feat: support mapping F1-F12 keys to ANSI escape sequences (resolves #91)

Add AuthMethod::Config: parse ~/.ssh/config and list concrete host
entries in the connection dialog. Selecting an entry pre-fills
host/port/user/identity file and connects.

- Extract shared key utilities into session::ssh_keys
  (private_keys_with_algs, normalize_inline_private_key,
  authenticate_with_default_keys, session_has_explicit_key), reused by
  backend::ssh and sftp to remove duplication.
- Add session::ssh_config parser for ~/.ssh/config (Host/HostName/User/
  Port/IdentityFile), skipping wildcard patterns and Match/Include.
- Key auth now falls back to default keys (~/.ssh/id_*) when no explicit
  key path or inline content is provided.
- Preserve escaped \r\n normalization in normalize_inline_private_key
  when refactoring into the shared module.

Cargo.lock

@@ -315,7 +315,7 @@ dependencies = [
 
 [[package]]
 name = "ashell"
-version = "0.4.9"
+version = "0.4.12"
 dependencies = [
  "alacritty_terminal",
  "anyhow",
@@ -334,6 +334,7 @@ dependencies = [
  "hex",
  "hmac",
  "image",
+ "libc",
  "menu",
  "notify 6.1.1",
  "open",
@@ -347,6 +348,7 @@ dependencies = [
  "rust-i18n 3.1.5",
  "serde",
  "serde_json",
+ "serialport",
  "sha2",
  "ssh-key",
  "sys-locale",
@@ -361,6 +363,7 @@ dependencies = [
  "tracing-subscriber",
  "uuid",
  "walkdir",
+ "winreg 0.52.0",
  "winres",
  "zip",
 ]
@@ -2760,7 +2763,7 @@ dependencies = [
  "itertools 0.14.0",
  "log",
  "lyon",
- "mach2",
+ "mach2 0.5.0",
  "media",
  "metal",
  "num_cpus",
@@ -2950,7 +2953,7 @@ dependencies = [
  "itertools 0.14.0",
  "libc",
  "log",
- "mach2",
+ "mach2 0.5.0",
  "media",
  "metal",
  "objc",
@@ -3683,6 +3686,16 @@ dependencies = [
  "rustversion",
 ]
 
+[[package]]
+name = "io-kit-sys"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "617ee6cf8e3f66f3b4ea67a4058564628cde41901316e19f559e14c7c72c5e7b"
+dependencies = [
+ "core-foundation-sys",
+ "mach2 0.4.3",
+]
+
 [[package]]
 name = "io-surface"
 version = "0.16.1"
@@ -3952,6 +3965,26 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "libudev"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78b324152da65df7bb95acfcaab55e3097ceaab02fb19b228a9eb74d55f135e0"
+dependencies = [
+ "libc",
+ "libudev-sys",
+]
+
+[[package]]
+name = "libudev-sys"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c8469b4a23b962c1396b9b451dda50ef5b283e8dd309d69033475fa9b334324"
+dependencies = [
+ "libc",
+ "pkg-config",
+]
+
 [[package]]
 name = "linebender_resource_handle"
 version = "0.1.1"
@@ -4099,6 +4132,15 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4"
 
+[[package]]
+name = "mach2"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d640282b302c0bb0a2a8e0233ead9035e3bed871f0b7e81fe4a1ec829765db44"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "mach2"
 version = "0.5.0"
@@ -4397,6 +4439,17 @@ dependencies = [
  "pin-utils",
 ]
 
+[[package]]
+name = "nix"
+version = "0.26.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "598beaf3cc6fdd9a5dfb1630c2800c7acd31df7aaf0f565796fba2b53ca1af1b"
+dependencies = [
+ "bitflags 1.3.2",
+ "cfg-if",
+ "libc",
+]
+
 [[package]]
 name = "nix"
 version = "0.29.0"
@@ -6897,6 +6950,25 @@ dependencies = [
  "serial-core",
 ]
 
+[[package]]
+name = "serialport"
+version = "4.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4d91116f97173694f1642263b2ff837f80d933aa837e2314969f6728f661df3"
+dependencies = [
+ "bitflags 2.12.1",
+ "cfg-if",
+ "core-foundation 0.10.0",
+ "core-foundation-sys",
+ "io-kit-sys",
+ "libudev",
+ "mach2 0.4.3",
+ "nix 0.26.4",
+ "scopeguard",
+ "unescaper",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "sha1"
 version = "0.10.6"
@@ -8133,6 +8205,15 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "unescaper"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7285e83a80ce76f5e7bce79fa41f68d78ba62d1003cf27bf748ab24413808cf4"
+dependencies = [
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "unicase"
 version = "2.9.0"
@@ -8310,7 +8391,7 @@ dependencies = [
  "itertools 0.14.0",
  "libc",
  "log",
- "mach2",
+ "mach2 0.5.0",
  "nix 0.29.0",
  "percent-encoding",
  "regex",
@@ -9563,6 +9644,16 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "winreg"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a277a57398d4bfa075df44f501a17cfdf8542d224f0d36095a2adc7aee4ef0a5"
+dependencies = [
+ "cfg-if",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "winreg"
 version = "0.55.0"

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ashell"
-version = "0.4.9"
+version = "0.4.12"
 edition = "2024"
 authors = ["ashell contributors"]
 description = "A GPUI Component based SSH and local terminal client"
@@ -50,10 +50,17 @@ base64 = "0.22"
 chacha20poly1305 = "0.10"
 hmac = "0.12"
 hex = "0.4"
+serialport = "4"
 rand = "0.8"
 reqwest = { version = "0.12", default-features = false, features = ["rustls-tls"] }
 sha2 = "0.10"
 
+[dev-dependencies]
+libc = "0.2"
+
+[target.'cfg(target_os = "windows")'.dependencies]
+winreg = "0.52"
+
 [package.metadata.deb]
 maintainer = "ashell contributors"
 license-file = ["LICENSE"]

locales/en.yml

@@ -13,6 +13,11 @@ size: "SIZE"
 modified: "MODIFIED"
 new_ssh_connection: "New SSH Connection"
 create_or_edit_ssh_session: "Create or edit an SSH session"
+new_serial_connection: "New Serial Connection"
+create_or_edit_serial_session: "Create or edit a Serial session"
+serial_port: "Serial Port Path"
+baud_rate: "Baud Rate"
+session_name: "Session Name"
 new_folder: "New Folder"
 create_folder_success: "Created folder: %{name}"
 create_folder_failed: "Failed to create folder: %{err}"
@@ -33,6 +38,8 @@ port: "Port"
 user: "User"
 password: "Password"
 key: "Key"
+ssh_config: "Config(~/.ssh/config)"
+ssh_config_empty: "No entries found in ~/.ssh/config"
 private_key_path: "Private Key Path"
 private_key_data: "Private Key Data"
 save_and_connect: "Save & Connect"
@@ -132,6 +139,8 @@ settings_copy: "Copy Selection"
 settings_paste: "Paste Clipboard"
 edit_file: "Edit File"
 edit_file_tooltip: "Download to temporary directory, open in default editor, and auto upload on save."
+sync_cwd_tooltip: "Sync path from active terminal"
+sync_cwd: "Sync Path"
 auto_saved_and_uploaded: "Auto-saved & uploaded: %{base}"
 scroll: "Scroll ↓"
 clone: "Clone"
@@ -211,3 +220,7 @@ global_proxy_port: "Proxy Port"
 global_proxy_user: "Proxy Username"
 global_proxy_password: "Proxy Password"
 save_proxy: "Save Proxy"
+settings_config_file: "Config File"
+settings_backup_local_desc: "Export or import your unencrypted configuration file locally."
+backup_export: "Export Config"
+backup_import: "Import Config"

locales/zh-CN.yml

@@ -13,6 +13,11 @@ size: "大小"
 modified: "修改时间"
 new_ssh_connection: "新建 SSH 连接"
 create_or_edit_ssh_session: "创建或编辑一个 SSH 会话"
+new_serial_connection: "新建串口连接"
+create_or_edit_serial_session: "创建或编辑串口会话"
+serial_port: "串口设备路径"
+baud_rate: "波特率"
+session_name: "会话名称"
 new_folder: "新建文件夹"
 create_folder_success: "成功创建文件夹: %{name}"
 create_folder_failed: "创建文件夹失败: %{err}"
@@ -34,6 +39,8 @@ port: "端口 (Port)"
 user: "用户 (User)"
 password: "密码 (Password)"
 key: "密钥 (Key)"
+ssh_config: "配置(~/.ssh/config)"
+ssh_config_empty: "~/.ssh/config 中未找到条目"
 private_key_path: "私钥路径"
 private_key_data: "私钥内容"
 save_and_connect: "保存并连接"
@@ -133,6 +140,8 @@ settings_copy: "复制选区"
 settings_paste: "粘贴剪贴板"
 edit_file: "编辑文件"
 edit_file_tooltip: "下载到临时目录，使用默认编辑器打开，并在保存后自动上传。"
+sync_cwd_tooltip: "从当前终端同步路径"
+sync_cwd: "同步路径"
 auto_saved_and_uploaded: "已自动保存并上传: %{base}"
 scroll: "滑动查看 ↓"
 clone: "克隆"
@@ -213,3 +222,7 @@ global_proxy_port: "代理端口"
 global_proxy_user: "代理用户名"
 global_proxy_password: "代理密码"
 save_proxy: "保存代理设置"
+settings_config_file: "配置文件"
+settings_backup_local_desc: "在本地导出或导入你未加密的配置文件。"
+backup_export: "导出配置"
+backup_import: "导入配置"

src/app/config_sync.rs

@@ -126,4 +126,73 @@ impl Ashell {
             let _ = events.send(BackendEvent::SyncFinished(result));
         });
     }
+
+    pub(crate) fn export_local_config(
+        &mut self,
+        window: &mut gpui::Window,
+        cx: &mut Context<Self>,
+    ) {
+        let local_config = self.config.cache.clone();
+        let file_dialog = rfd::AsyncFileDialog::new()
+            .set_file_name("ashell-config.json")
+            .add_filter("JSON", &["json"])
+            .save_file();
+
+        cx.spawn_in(window, async move |_this, cx| {
+            if let Some(file_handle) = file_dialog.await {
+                let path = file_handle.path().to_path_buf();
+                if let Ok(json_str) = serde_json::to_string_pretty(&local_config) {
+                    let _ = cx
+                        .background_executor()
+                        .spawn(async move {
+                            if let Err(err) = std::fs::write(path, json_str) {
+                                tracing::error!("failed to export local config: {err:#}");
+                            }
+                        })
+                        .await;
+                }
+            }
+            Ok::<(), anyhow::Error>(())
+        })
+        .detach();
+    }
+
+    pub(crate) fn import_local_config(
+        &mut self,
+        window: &mut gpui::Window,
+        cx: &mut Context<Self>,
+    ) {
+        let file_dialog = rfd::AsyncFileDialog::new()
+            .add_filter("JSON", &["json"])
+            .pick_file();
+
+        cx.spawn_in(window, async move |this, mut cx| {
+            if let Some(file_handle) = file_dialog.await {
+                let path = file_handle.path().to_path_buf();
+                let read_result = cx
+                    .background_executor()
+                    .spawn(async move { std::fs::read_to_string(path) })
+                    .await;
+
+                if let Ok(json_str) = read_result {
+                    if let Ok(config_file) =
+                        serde_json::from_str::<crate::session::config::ConfigFile>(&json_str)
+                    {
+                        let _ = gpui::AsyncWindowContext::update(&mut cx, |window, cx| {
+                            let _ = this.update(cx, |this, cx| {
+                                this.config.cache = config_file;
+                                if let Err(err) = this.config.save() {
+                                    tracing::error!("failed to save imported config: {err:#}");
+                                } else {
+                                    this.apply_loaded_config(window, cx);
+                                }
+                            });
+                        });
+                    }
+                }
+            }
+            Ok::<(), anyhow::Error>(())
+        })
+        .detach();
+    }
 }

src/app/keybinding_recorder.rs

@@ -128,12 +128,20 @@ pub(crate) const WORKSPACE_ACTIONS: &[WorkspaceAction] = &[
     WorkspaceAction {
         id: "Copy",
         label_key: "settings_copy",
-        default_suffix: if cfg!(target_os = "macos") { "c" } else { "shift-c" },
+        default_suffix: if cfg!(target_os = "macos") {
+            "c"
+        } else {
+            "shift-c"
+        },
     },
     WorkspaceAction {
         id: "Paste",
         label_key: "settings_paste",
-        default_suffix: if cfg!(target_os = "macos") { "v" } else { "shift-v" },
+        default_suffix: if cfg!(target_os = "macos") {
+            "v"
+        } else {
+            "shift-v"
+        },
     },
 ];
 
@@ -210,7 +218,7 @@ pub(crate) fn unbind_all_workspace_keys(cx: &mut App, config: &ConfigStore) {
 
             // Unbind both the default and configured keystroke
             bindings.push(KeyBinding::new(&default, Unbind(action_name.into()), None));
-            if configured != default {
+            if configured != default && configured != "none" && !configured.is_empty() {
                 bindings.push(KeyBinding::new(
                     &configured,
                     Unbind(action_name.into()),
@@ -254,7 +262,7 @@ pub(crate) fn find_conflict(
             continue;
         }
         let existing = configured_keystroke(config, action.id).unwrap_or_default();
-        if !existing.is_empty() && existing == new_keystroke {
+        if !existing.is_empty() && existing != "none" && existing == new_keystroke {
             return Some((action.id.to_string(), t!(action.label_key).to_string()));
         }
     }
@@ -274,7 +282,9 @@ fn bind_workspace_actions(cx: &mut App, config: &ConfigStore) {
                 bindings.push(KeyBinding::new(&default, Unbind(action_name.into()), None));
             }
 
-            bindings.push(KeyBinding::new(&configured, $action, None));
+            if configured != "none" && !configured.is_empty() {
+                bindings.push(KeyBinding::new(&configured, $action, None));
+            }
         };
     }
 
@@ -305,7 +315,15 @@ impl KeybindingsPage {
         let groups = [
             (
                 "settings_group_keybind_general",
-                vec!["OpenSettings", "OpenSession", "OpenTransfers", "NewSsh", "OpenSearch", "Copy", "Paste"],
+                vec![
+                    "OpenSettings",
+                    "OpenSession",
+                    "OpenTransfers",
+                    "NewSsh",
+                    "OpenSearch",
+                    "Copy",
+                    "Paste",
+                ],
             ),
             (
                 "settings_group_keybind_zoom",

src/app/mod.rs

@@ -2,11 +2,11 @@ pub mod config_sync;
 pub mod constants;
 pub mod dialogs;
 pub mod keybinding_recorder;
+pub mod resizable;
 pub mod search;
 pub mod startup;
 pub mod theme;
 pub mod ui;
-pub mod resizable;
 
 use std::{
     cell::{Cell, RefCell},
@@ -17,6 +17,7 @@ use std::{
     time::{Duration, Instant},
 };
 
+use crate::app::resizable::ResizableState;
 use gpui::{
     AppContext as _, Bounds, Context, Entity, FocusHandle, Pixels, Point, SharedString, Size,
     UniformListScrollHandle, Window, point, px, size,
@@ -26,12 +27,12 @@ use gpui_component::{
     input::{InputEvent, InputState},
     scroll::ScrollbarHandle,
 };
-use crate::app::resizable::ResizableState;
 use rust_i18n::t;
 use tokio::runtime::Runtime;
 
 use crate::{
     session::config::{AuthMethod, ConfigStore},
+    session::ssh_config::SshConfigEntry,
     system::{SystemSampler, SystemSnapshot},
     terminal::{self, BackendEvent, TabKind, TerminalTab},
 };
@@ -211,6 +212,8 @@ pub(crate) struct Ashell {
     pub(crate) key_path_input: Entity<InputState>,
     pub(crate) key_inline_input: Entity<InputState>,
     pub(crate) passphrase_input: Entity<InputState>,
+    pub(crate) baud_rate_input: Entity<InputState>,
+    pub(crate) session_protocol: String,
     pub(crate) ssh_proxy_type: String,
     pub(crate) proxy_host_input: Entity<InputState>,
     pub(crate) proxy_port_input: Entity<InputState>,
@@ -236,6 +239,8 @@ pub(crate) struct Ashell {
     pub(crate) sync_status: SharedString,
     pub(crate) sftp_path_input: Entity<InputState>,
     pub(crate) ssh_auth_method: AuthMethod,
+    pub(crate) ssh_config_entries: Vec<SshConfigEntry>,
+    pub(crate) ssh_config_selected: Option<usize>,
     pub(crate) editing_session_id: Option<String>,
     pub(crate) follow_system_theme: bool,
     pub(crate) theme_mode: ThemeMode,
@@ -322,6 +327,8 @@ pub(crate) struct Ashell {
     pub(crate) hovered_url: Option<HoveredUrl>,
     pub(crate) cmd_ctrl_pressed: bool,
     pub(crate) _subscriptions: Vec<gpui::Subscription>,
+    pub(crate) save_lock: std::sync::Arc<tokio::sync::Mutex<()>>,
+    pub(crate) save_latest_seq: std::sync::Arc<std::sync::atomic::AtomicU64>,
 }
 
 #[derive(Clone, Debug, PartialEq, Eq)]
@@ -398,16 +405,23 @@ impl Ashell {
                 .placeholder("SSH private key passphrase (optional)")
                 .masked(true)
         });
-        let proxy_host_input = cx.new(|cx| InputState::new(window, cx).placeholder(t!("proxy_host").to_string()));
-        let proxy_port_input = cx.new(|cx| InputState::new(window, cx).placeholder(t!("proxy_port").to_string()));
-        let proxy_user_input = cx.new(|cx| InputState::new(window, cx).placeholder(t!("proxy_user").to_string()));
-        let proxy_password_input = cx.new(|cx| InputState::new(window, cx).placeholder(t!("proxy_password").to_string()).masked(true));
+        let baud_rate_input = cx.new(|cx| InputState::new(window, cx).default_value("115200"));
+        let proxy_host_input =
+            cx.new(|cx| InputState::new(window, cx).placeholder(t!("proxy_host").to_string()));
+        let proxy_port_input =
+            cx.new(|cx| InputState::new(window, cx).placeholder(t!("proxy_port").to_string()));
+        let proxy_user_input =
+            cx.new(|cx| InputState::new(window, cx).placeholder(t!("proxy_user").to_string()));
+        let proxy_password_input = cx.new(|cx| {
+            InputState::new(window, cx)
+                .placeholder(t!("proxy_password").to_string())
+                .masked(true)
+        });
         let sftp_path_input = cx.new(|cx| InputState::new(window, cx).default_value("/"));
         let sftp_new_folder_input =
             cx.new(|cx| InputState::new(window, cx).placeholder(t!("new_folder").to_string()));
-        let search_input = cx.new(|cx| {
-            InputState::new(window, cx).placeholder(t!("search").to_string())
-        });
+        let search_input =
+            cx.new(|cx| InputState::new(window, cx).placeholder(t!("search").to_string()));
         let config = ConfigStore::load().unwrap_or_else(|err| {
             tracing::warn!("failed to load config: {err:#}");
             ConfigStore::in_memory()
@@ -420,7 +434,12 @@ impl Ashell {
         let global_proxy_port_input = cx.new(|cx| {
             InputState::new(window, cx)
                 .placeholder(t!("proxy_port").to_string())
-                .default_value(config.global_proxy_port().map(|p| p.to_string()).unwrap_or_default())
+                .default_value(
+                    config
+                        .global_proxy_port()
+                        .map(|p| p.to_string())
+                        .unwrap_or_default(),
+                )
         });
         let global_proxy_user_input = cx.new(|cx| {
             InputState::new(window, cx)
@@ -496,6 +515,7 @@ impl Ashell {
             cx.subscribe_in(&key_path_input, window, Self::on_input_event),
             cx.subscribe_in(&key_inline_input, window, Self::on_input_event),
             cx.subscribe_in(&passphrase_input, window, Self::on_input_event),
+            cx.subscribe_in(&baud_rate_input, window, Self::on_input_event),
             cx.subscribe_in(&proxy_host_input, window, Self::on_input_event),
             cx.subscribe_in(&proxy_port_input, window, Self::on_input_event),
             cx.subscribe_in(&proxy_user_input, window, Self::on_input_event),
@@ -574,6 +594,8 @@ impl Ashell {
             key_path_input,
             key_inline_input,
             passphrase_input,
+            baud_rate_input,
+            session_protocol: "ssh".to_string(),
             ssh_proxy_type: "none".to_string(),
             proxy_host_input,
             proxy_port_input,
@@ -599,6 +621,8 @@ impl Ashell {
             sync_status: t!("sync_not_run").into(),
             sftp_path_input,
             ssh_auth_method: AuthMethod::Password,
+            ssh_config_entries: crate::session::ssh_config::parse_ssh_config().unwrap_or_default(),
+            ssh_config_selected: None,
             editing_session_id: None,
             follow_system_theme,
             theme_mode,
@@ -696,6 +720,8 @@ impl Ashell {
             hovered_url: None,
             cmd_ctrl_pressed: false,
             _subscriptions,
+            save_lock: std::sync::Arc::new(tokio::sync::Mutex::new(())),
+            save_latest_seq: std::sync::Arc::new(std::sync::atomic::AtomicU64::new(0)),
         };
 
         this.apply_theme_preferences(window, cx);
@@ -704,6 +730,74 @@ impl Ashell {
         this
     }
 
+    pub(crate) fn apply_loaded_config(
+        &mut self,
+        window: &mut gpui::Window,
+        cx: &mut Context<Self>,
+    ) {
+        self.follow_system_theme = self.config.follow_system_theme();
+        self.theme_mode = match self.config.theme_mode() {
+            "light" => ThemeMode::Light,
+            "dark" => ThemeMode::Dark,
+            _ => ThemeMode::Dark,
+        };
+        self.light_theme_name = self.config.light_theme_name().to_string().into();
+        self.dark_theme_name = self.config.dark_theme_name().to_string().into();
+        self.ui_font_size = self.config.ui_font_size();
+        self.terminal_font_size = self.config.terminal_font_size();
+        self.cursor_style = self.config.cursor_style();
+        self.ui_font_family = self.config.ui_font_family().to_string().into();
+        self.terminal_font_family = self.config.terminal_font_family().to_string().into();
+        self.show_hidden_files = self.config.show_hidden_files();
+        self.sftp_panel_minimized = self.config.sftp_panel_minimized();
+        self.sidebar_collapsed = self.config.sidebar_collapsed();
+        self.active_title_bar_style = self.config.title_bar_style();
+
+        // Apply theme preferences
+        self.apply_theme_preferences(window, cx);
+
+        // Update inputs
+        Self::set_input_value(
+            &self.sync_endpoint_input,
+            self.config.sync_endpoint().to_string(),
+            window,
+            cx,
+        );
+        Self::set_input_value(
+            &self.sync_username_input,
+            self.config.sync_username().to_string(),
+            window,
+            cx,
+        );
+        Self::set_input_value(
+            &self.sync_s3_endpoint_input,
+            self.config.sync_s3_endpoint().to_string(),
+            window,
+            cx,
+        );
+        Self::set_input_value(
+            &self.sync_s3_region_input,
+            self.config.sync_s3_region().to_string(),
+            window,
+            cx,
+        );
+        Self::set_input_value(
+            &self.sync_s3_bucket_input,
+            self.config.sync_s3_bucket().to_string(),
+            window,
+            cx,
+        );
+        Self::set_input_value(
+            &self.sync_s3_object_key_input,
+            self.config.sync_s3_object_key().to_string(),
+            window,
+            cx,
+        );
+
+        // Notify
+        cx.notify();
+    }
+
     pub(crate) fn on_input_event(
         &mut self,
         input: &Entity<InputState>,
@@ -762,9 +856,29 @@ impl Ashell {
         cx.notify();
     }
 
+    pub(crate) fn save_preferences_background(&mut self) {
+        let local_config = self.config.cache.clone();
+        let config_store = self.config.clone();
+        let latest_seq = self.save_latest_seq.clone();
+        let current_seq = latest_seq.fetch_add(1, std::sync::atomic::Ordering::SeqCst) + 1;
+        let save_lock = self.save_lock.clone();
+
+        self.runtime.spawn(async move {
+            let _guard = save_lock.lock().await;
+            if current_seq < latest_seq.load(std::sync::atomic::Ordering::SeqCst) {
+                return;
+            }
+            let _ = tokio::task::spawn_blocking(move || {
+                if let Err(err) = config_store.save_merged_preferences(local_config) {
+                    tracing::error!("failed to save merged preferences in background: {err:#}");
+                }
+            })
+            .await;
+        });
+    }
+
     pub(crate) fn start_event_pump(&self, cx: &mut Context<Self>) {
         cx.spawn(async move |this, cx| {
-            let mut idle_frames = 0u32;
             let mut last_blink_time = std::time::Instant::now();
             loop {
                 cx.background_executor()
@@ -781,19 +895,14 @@ impl Ashell {
                                 | crate::session::config::CursorStyle::BeamBlink
                         );
                         let now = std::time::Instant::now();
-                        let blink_due = is_blinking && now.duration_since(last_blink_time) >= std::time::Duration::from_millis(600);
+                        let blink_due = is_blinking
+                            && now.duration_since(last_blink_time)
+                                >= std::time::Duration::from_millis(600);
                         if changed || system_sampled || blink_due {
                             cx.notify();
-                            idle_frames = 0;
                             if blink_due {
                                 last_blink_time = now;
                             }
-                        } else {
-                            idle_frames += 1;
-                            if idle_frames >= 60 {
-                                cx.notify();
-                                idle_frames = 0;
-                            }
                         }
                     })
                     .is_err()
@@ -992,7 +1101,7 @@ impl Ashell {
                 }
                 BackendEvent::TerminalTitleChanged { tab_id, title } => {
                     if let Some(tab) = self.tabs.iter_mut().find(|t| t.id == tab_id) {
-                        tab.title = title.clone();
+                        tab.dynamic_title = title;
                     }
                 }
                 BackendEvent::SyncFinished(result) => {
@@ -1127,7 +1236,7 @@ impl Ashell {
         let mut retry_tabs = Vec::new();
         for (ix, tab) in self.tabs.iter().enumerate() {
             if !tab.connected && tab.session.is_some() && tab.id == progress.tab_id {
-                retry_tabs.push((ix, tab.id.clone(), tab.session.clone().unwrap()));
+                retry_tabs.push((ix, tab.id.clone(), tab.session.clone().unwrap(), tab.kind));
             }
         }
 
@@ -1136,19 +1245,34 @@ impl Ashell {
             return;
         }
 
-        for (ix, tab_id, session) in retry_tabs {
+        for (ix, tab_id, session, tab_kind) in retry_tabs {
             // Close old backend
             self.tabs[ix].send_backend(crate::terminal::BackendCommand::Close);
 
             // Spawn new backend
-            let backend = crate::backend::ssh::spawn_ssh_terminal(
-                self.runtime.handle(),
-                tab_id.clone(),
-                session.clone(),
-                self.tabs[ix].cols,
-                self.tabs[ix].rows,
-                self.events_tx.clone(),
-            );
+            let backend = match tab_kind {
+                crate::terminal::TabKind::Serial => {
+                    let b = crate::backend::serial::spawn_serial_client(
+                        self.runtime.handle(),
+                        tab_id.clone(),
+                        session.clone(),
+                        self.events_tx.clone(),
+                    );
+                    crate::terminal::BackendTx::Serial(b)
+                }
+                crate::terminal::TabKind::Ssh => {
+                    let b = crate::backend::ssh::spawn_ssh_terminal(
+                        self.runtime.handle(),
+                        tab_id.clone(),
+                        session.clone(),
+                        self.tabs[ix].cols,
+                        self.tabs[ix].rows,
+                        self.events_tx.clone(),
+                    );
+                    b
+                }
+                _ => continue,
+            };
 
             // Replace tab state
             self.tabs[ix].set_backend(backend);
@@ -1171,20 +1295,22 @@ impl Ashell {
                     .and_then(|t| t.session.clone());
 
                 if let Some(session) = group_session {
-                    if let Some(old_handle) = self.sftp_handles.remove(&group_id) {
-                        old_handle.close();
-                    }
-                    let sftp_handle = crate::sftp::spawn_sftp(
-                        self.runtime.handle(),
-                        group_id.clone(),
-                        session,
-                        self.events_tx.clone(),
-                    );
-                    self.sftp_handles.insert(group_id.clone(), sftp_handle);
+                    if session.protocol != "serial" {
+                        if let Some(old_handle) = self.sftp_handles.remove(&group_id) {
+                            old_handle.close();
+                        }
+                        let sftp_handle = crate::sftp::spawn_sftp(
+                            self.runtime.handle(),
+                            group_id.clone(),
+                            session,
+                            self.events_tx.clone(),
+                        );
+                        self.sftp_handles.insert(group_id.clone(), sftp_handle);
 
-                    if let Some(group) = self.tab_groups.iter_mut().find(|g| g.id == group_id) {
-                        if let Some(sftp) = group.sftp.as_mut() {
-                            sftp.status = rust_i18n::t!("sftp_connecting").to_string();
+                        if let Some(group) = self.tab_groups.iter_mut().find(|g| g.id == group_id) {
+                            if let Some(sftp) = group.sftp.as_mut() {
+                                sftp.status = rust_i18n::t!("sftp_connecting").to_string();
+                            }
                         }
                     }
                 }
@@ -1210,6 +1336,73 @@ impl Ashell {
         cx.notify();
     }
 
+    pub(crate) fn sync_cwd_from_terminal(
+        &mut self,
+        _window: &mut gpui::Window,
+        _cx: &mut Context<Self>,
+    ) {
+        let active_id = self.active_tab.clone();
+        let Some(active_id) = active_id else {
+            return;
+        };
+
+        if let Some(tab) = self.tabs.iter().find(|t| t.id == active_id) {
+            let home_dir = if let Some(group) = self
+                .tab_groups
+                .iter()
+                .find(|g| g.pane_root.contains(&tab.id))
+            {
+                group
+                    .sftp
+                    .as_ref()
+                    .map(|s| s.home_dir.as_str())
+                    .unwrap_or("/")
+            } else {
+                "/"
+            };
+
+            let parsed = Self::parse_path_from_title(&tab.dynamic_title, home_dir);
+
+            if let Some(path) = parsed {
+                if let Some(group) = self
+                    .tab_groups
+                    .iter_mut()
+                    .find(|g| g.pane_root.contains(&active_id))
+                {
+                    if let Some(sftp) = group.sftp.as_mut() {
+                        sftp.current_path = path.clone();
+                        self.pending_sftp_path_sync = Some(path.clone());
+                        if let Some(handle) = self.sftp_handles.get(&group.id) {
+                            let _ = handle
+                                .commands
+                                .send(crate::sftp::SftpCommand::ListDir(path));
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    fn parse_path_from_title(title: &str, home_dir: &str) -> Option<String> {
+        let title = title.strip_prefix("ASHELL_CWD:").unwrap_or(title);
+        let path_part = if let Some(pos) = title.find(':') {
+            title[pos + 1..].trim()
+        } else {
+            title.trim()
+        };
+
+        if path_part.starts_with('/') {
+            Some(path_part.to_string())
+        } else if path_part == "~" {
+            Some(home_dir.to_string())
+        } else if let Some(rest) = path_part.strip_prefix("~/") {
+            let home = home_dir.trim_end_matches('/');
+            Some(format!("{}/{}", home, rest))
+        } else {
+            None
+        }
+    }
+
     pub(crate) fn save_layout_state(&self, window: &mut gpui::Window, cx: &gpui::App) {
         if self.is_layout_reset {
             tracing::info!("[ui] layout was reset, skipping save layout state.");
@@ -1223,8 +1416,9 @@ impl Ashell {
         };
         let size = bounds.size;
         if size.width.as_f32() > 400.0 && size.height.as_f32() > 300.0 {
-            tracing::info!("[ui] saving layout state...");
-            let mut config = ConfigStore::load().unwrap_or_else(|_| ConfigStore::in_memory());
+            self.save_latest_seq
+                .fetch_add(1, std::sync::atomic::Ordering::SeqCst);
+            let mut config = self.config.clone();
             let saved_bounds = match current_bounds {
                 gpui::WindowBounds::Fullscreen(b) => {
                     crate::session::config::SavedWindowBounds::Fullscreen {
@@ -1235,13 +1429,28 @@ impl Ashell {
                     }
                 }
                 gpui::WindowBounds::Maximized(b) => {
-                    let mut restore_bounds = (b.origin.x.into(), b.origin.y.into(), b.size.width.into(), b.size.height.into());
+                    let mut restore_bounds = (
+                        b.origin.x.into(),
+                        b.origin.y.into(),
+                        b.size.width.into(),
+                        b.size.height.into(),
+                    );
                     if let Some(existing_bounds) = config.window_bounds() {
                         match existing_bounds {
-                            crate::session::config::SavedWindowBounds::Windowed { x, y, width, height } => {
+                            crate::session::config::SavedWindowBounds::Windowed {
+                                x,
+                                y,
+                                width,
+                                height,
+                            } => {
                                 restore_bounds = (*x, *y, *width, *height);
                             }
-                            crate::session::config::SavedWindowBounds::Maximized { x, y, width, height } => {
+                            crate::session::config::SavedWindowBounds::Maximized {
+                                x,
+                                y,
+                                width,
+                                height,
+                            } => {
                                 restore_bounds = (*x, *y, *width, *height);
                             }
                             _ => {}
@@ -1263,13 +1472,15 @@ impl Ashell {
                     }
                 }
             };
-            let workspace_sizes: Vec<f32> = self.workspace_panels
+            let workspace_sizes: Vec<f32> = self
+                .workspace_panels
                 .read(cx)
                 .sizes()
                 .iter()
                 .map(|s| s.into())
                 .collect();
-            let mut body_sizes: Vec<f32> = self.body_panels
+            let mut body_sizes: Vec<f32> = self
+                .body_panels
                 .read(cx)
                 .sizes()
                 .iter()

src/app/resizable/panel.rs

@@ -4,17 +4,15 @@ use std::{
 };
 
 use gpui::{
-    Along, AnyElement, App, Axis, Bounds, Context, Element, ElementId, Empty, Entity,
-    EventEmitter, InteractiveElement as _, IntoElement, MouseMoveEvent, MouseUpEvent,
-    ParentElement, Pixels, Render, RenderOnce, Style, StyleRefinement, Styled, Window, div,
-    prelude::FluentBuilder, AppContext as _, IsZero as _,
+    Along, AnyElement, App, AppContext as _, Axis, Bounds, Context, Element, ElementId, Empty,
+    Entity, EventEmitter, InteractiveElement as _, IntoElement, IsZero as _, MouseMoveEvent,
+    MouseUpEvent, ParentElement, Pixels, Render, RenderOnce, Style, StyleRefinement, Styled,
+    Window, div, prelude::FluentBuilder,
 };
 
-use gpui_component::{
-    AxisExt, ElementExt, h_flex, v_flex, StyledExt,
-};
+use gpui_component::{AxisExt, ElementExt, StyledExt, h_flex, v_flex};
 
-use super::{ResizableState, resizable_panel, resize_handle, PANEL_MIN_SIZE, ResizablePanelEvent};
+use super::{PANEL_MIN_SIZE, ResizablePanelEvent, ResizableState, resizable_panel, resize_handle};
 
 #[derive(Clone)]
 pub(crate) struct DragPanel;
@@ -305,16 +303,13 @@ impl RenderOnce for ResizablePanel {
                 let handle = if self.locked {
                     handle
                 } else {
-                    handle.on_drag(
-                        DragPanel,
-                        move |drag_panel, _, _, cx| {
-                            cx.stop_propagation();
-                            state.update(cx, |state, _| {
-                                state.resizing_panel_ix = Some(ix);
-                            });
-                            cx.new(|_| drag_panel.deref().clone())
-                        },
-                    )
+                    handle.on_drag(DragPanel, move |drag_panel, _, _, cx| {
+                        cx.stop_propagation();
+                        state.update(cx, |state, _| {
+                            state.resizing_panel_ix = Some(ix);
+                        });
+                        cx.new(|_| drag_panel.deref().clone())
+                    })
                 };
                 this.child(handle)
             })

src/app/resizable/resize_handle.rs

@@ -1,9 +1,9 @@
 use std::{cell::Cell, rc::Rc};
 
 use gpui::{
-    div, prelude::FluentBuilder as _, px, AnyElement, App, Axis, Element, ElementId, Entity,
-    GlobalElementId, InteractiveElement, IntoElement, MouseDownEvent, MouseUpEvent,
-    ParentElement as _, Pixels, Point, Render, StatefulInteractiveElement, Styled as _, Window,
+    AnyElement, App, Axis, Element, ElementId, Entity, GlobalElementId, InteractiveElement,
+    IntoElement, MouseDownEvent, MouseUpEvent, ParentElement as _, Pixels, Point, Render,
+    StatefulInteractiveElement, Styled as _, Window, div, prelude::FluentBuilder as _, px,
 };
 
 use gpui_component::{ActiveTheme as _, AxisExt as _, dock::DockPlacement};
@@ -126,14 +126,13 @@ impl<T: 'static, E: 'static + Render> Element for ResizeHandle<T, E> {
                     )
                 })
                 .map(|this| match self.placement {
-                    Some(DockPlacement::Left) => {
-                        this.when(has_drag, |this| this.cursor_col_resize())
-                            .top_0()
-                            .right(px(1.))
-                            .h_full()
-                            .w(HANDLE_SIZE)
-                            .pl(HANDLE_PADDING)
-                    }
+                    Some(DockPlacement::Left) => this
+                        .when(has_drag, |this| this.cursor_col_resize())
+                        .top_0()
+                        .right(px(1.))
+                        .h_full()
+                        .w(HANDLE_SIZE)
+                        .pl(HANDLE_PADDING),
                     _ => this
                         .when(axis.is_horizontal(), |this| {
                             this.when(has_drag, |this| this.cursor_col_resize())

src/app/search.rs

@@ -1,13 +1,14 @@
 use std::collections::HashMap;
 
 use gpui::{
-    Context, Focusable as _, Hsla, IntoElement, InteractiveElement as _, MouseButton,
+    Context, Focusable as _, Hsla, InteractiveElement as _, IntoElement, MouseButton,
     ParentElement as _, Styled as _, Window, div, prelude::FluentBuilder as _, px, rems,
 };
 use gpui_component::{
     ActiveTheme as _, Disableable as _, ElementExt as _, IconName, Sizable as _,
     button::{Button, ButtonVariants as _},
-    h_flex, input::Input,
+    h_flex,
+    input::Input,
 };
 use rust_i18n::t;
 
@@ -214,7 +215,7 @@ impl Ashell {
         };
 
         if let Some(tab) = tab {
-            let snapshot = tab.render_snapshot();
+            let snapshot = tab.render_snapshot(false);
             let display_offset = snapshot.display_offset as i32;
             let rows = snapshot.rows as i32;
 
@@ -274,7 +275,7 @@ impl Ashell {
         let Some(tab) = tab else {
             return None;
         };
-        let snapshot = tab.render_snapshot();
+        let snapshot = tab.render_snapshot(false);
         let display_offset = snapshot.display_offset as i32;
         let rows = snapshot.rows as i32;
 
@@ -323,23 +324,19 @@ impl Ashell {
     }
 
     /// Render the search button (used in the tab bar).
-    pub(crate) fn render_search_button(
-        &self,
-        cx: &mut Context<Self>,
-    ) -> impl gpui::IntoElement {
+    pub(crate) fn render_search_button(&self, cx: &mut Context<Self>) -> impl gpui::IntoElement {
         // Wrap in a div so .hover() doesn't conflict with Button's internal hover.
-        div()
-            .child(
-                Button::new("search-btn")
-                    .ghost()
-                    .small()
-                    .rounded(px(999.))
-                    .icon(IconName::Search)
-                    .tooltip(t!("search").to_string())
-                    .on_click(cx.listener(|this, _, window, cx| {
-                        this.toggle_search(window, cx);
-                    })),
-            )
+        div().child(
+            Button::new("search-btn")
+                .ghost()
+                .small()
+                .rounded(px(999.))
+                .icon(IconName::Search)
+                .tooltip(t!("search").to_string())
+                .on_click(cx.listener(|this, _, window, cx| {
+                    this.toggle_search(window, cx);
+                })),
+        )
     }
 
     /// Render the expanded search bar overlay (when search is active).
@@ -369,10 +366,13 @@ impl Ashell {
                     this.search_bar_bounds = Some(bounds);
                 });
             })
-            .on_mouse_down(MouseButton::Left, cx.listener(|this, _, window, cx| {
-                this.refocus_search_input(window, cx);
-                cx.stop_propagation();
-            }))
+            .on_mouse_down(
+                MouseButton::Left,
+                cx.listener(|this, _, window, cx| {
+                    this.refocus_search_input(window, cx);
+                    cx.stop_propagation();
+                }),
+            )
             .child(
                 h_flex()
                     .gap_1()
@@ -385,13 +385,15 @@ impl Ashell {
                     .child(
                         div()
                             .w(px(200.))
-                            .on_key_down(cx.listener(|this, event: &gpui::KeyDownEvent, window, cx| {
-                                if event.keystroke.key.as_str() == "escape" {
-                                    this.close_search(window, cx);
-                                    window.prevent_default();
-                                    cx.stop_propagation();
-                                }
-                            }))
+                            .on_key_down(cx.listener(
+                                |this, event: &gpui::KeyDownEvent, window, cx| {
+                                    if event.keystroke.key.as_str() == "escape" {
+                                        this.close_search(window, cx);
+                                        window.prevent_default();
+                                        cx.stop_propagation();
+                                    }
+                                },
+                            ))
                             .child(Input::new(&self.search_input).small()),
                     )
                     .when(!current_display.is_empty(), |this| {

src/app/startup.rs

@@ -179,7 +179,14 @@ pub(crate) fn sync_macos_launch_environment() {
 }
 
 fn read_proxy_from_env() -> Option<(String, String, Option<u16>, String, String)> {
-    let vars = ["ALL_PROXY", "all_proxy", "HTTPS_PROXY", "https_proxy", "HTTP_PROXY", "http_proxy"];
+    let vars = [
+        "ALL_PROXY",
+        "all_proxy",
+        "HTTPS_PROXY",
+        "https_proxy",
+        "HTTP_PROXY",
+        "http_proxy",
+    ];
     for var in vars {
         if let Ok(val) = std::env::var(var) {
             if val.is_empty() {
@@ -301,13 +308,13 @@ pub(crate) fn open_main_window(cx: &mut App) {
         let focus_handle = view.read(cx).focus_handle.clone();
         window.focus(&focus_handle, cx);
 
-
-
         let view_clone = view.clone();
         window.on_window_should_close(cx, move |window: &mut gpui::Window, cx: &mut gpui::App| {
             let handle = window.window_handle();
             if !cx.windows().contains(&handle) {
-                tracing::warn!("[ui] window not found in app during close, skipping save layout state.");
+                tracing::warn!(
+                    "[ui] window not found in app during close, skipping save layout state."
+                );
                 return true;
             }
             view_clone.read(cx).save_layout_state(window, cx);

src/app/theme.rs

@@ -17,7 +17,10 @@ use std::sync::atomic::{AtomicBool, Ordering};
 pub(crate) static USING_SYSTEM_MAPLE: AtomicBool = AtomicBool::new(false);
 
 pub(crate) fn load_fonts(cx: &mut App) -> Result<()> {
-    let has_system_maple = cx.text_system().all_font_names().contains(&"Maple Mono NF CN".to_string());
+    let has_system_maple = cx
+        .text_system()
+        .all_font_names()
+        .contains(&"Maple Mono NF CN".to_string());
     if has_system_maple {
         USING_SYSTEM_MAPLE.store(true, Ordering::Relaxed);
     } else {
@@ -123,9 +126,7 @@ impl Ashell {
         }
         rust_i18n::set_locale(&active_locale);
         gpui_component::set_locale(&active_locale);
-        if let Err(err) = self.config.save() {
-            tracing::warn!("failed to save language preferences: {err:#}");
-        }
+        self.save_preferences_background();
         window.refresh();
         cx.notify();
     }
@@ -165,8 +166,6 @@ impl Ashell {
             self.light_theme_name.to_string(),
             self.dark_theme_name.to_string(),
         );
-        if let Err(err) = self.config.save() {
-            tracing::warn!("failed to save theme preferences: {err:#}");
-        }
+        self.save_preferences_background();
     }
 }

src/app/ui.rs

@@ -1,3 +1,4 @@
+use crate::app::resizable::{h_resizable, resizable_panel, v_resizable};
 use gpui::{
     Context, ElementId, Focusable as _, FontWeight, Hsla, InteractiveElement as _, IntoElement,
     MouseButton, MouseDownEvent, ParentElement as _, PathBuilder, Pixels, Render,
@@ -17,7 +18,6 @@ use gpui_component::{
     tab::{Tab, TabBar},
     v_flex,
 };
-use crate::app::resizable::{h_resizable, resizable_panel, v_resizable};
 use rust_i18n::t;
 
 use crate::{
@@ -26,7 +26,7 @@ use crate::{
     sftp::format_mtime,
     sftp::ops::is_editable_text_file,
     system::format_bytes,
-    terminal::{self, TabKind, TerminalTab},
+    terminal::{self, TabKind},
 };
 
 impl Ashell {
@@ -111,7 +111,7 @@ impl Ashell {
         }
         self.config
             .set_sftp_panel_minimized(self.sftp_panel_minimized);
-        let _ = self.config.save();
+        self.save_preferences_background();
         cx.notify();
     }
 
@@ -197,6 +197,17 @@ impl Ashell {
             .when_some(active_sftp.clone(), |this, sftp| {
                 let selected_entries = sftp.selected_entries.clone();
                 this.child(
+                    Button::new("sftp-sync-cwd")
+                        .ghost()
+                        .small()
+                        .icon(IconName::SquareTerminal)
+                        .label(t!("sync_cwd").to_string())
+                        .tooltip(t!("sync_cwd_tooltip").to_string())
+                        .on_click(cx.listener(|this, _, window, cx| {
+                            this.sync_cwd_from_terminal(window, cx);
+                        })),
+                )
+                .child(
                     Button::new("sftp-refresh")
                         .ghost()
                         .small()
@@ -282,7 +293,7 @@ impl Ashell {
                         .on_click(cx.listener(|this, checked, _, cx| {
                             this.show_hidden_files = *checked;
                             this.config.set_show_hidden_files(*checked);
-                            let _ = this.config.save();
+                            this.save_preferences_background();
                             cx.notify();
                         })),
                 )
@@ -1582,7 +1593,7 @@ impl Ashell {
                                     .on_click(cx.listener(|this, _, _, cx| {
                                         this.sidebar_collapsed = true;
                                         this.config.set_sidebar_collapsed(true);
-                                        let _ = this.config.save();
+                                        this.save_preferences_background();
                                         cx.notify();
                                     })),
                             )
@@ -1611,6 +1622,13 @@ impl Ashell {
                                                 "ssh".to_string()
                                             }
                                         }
+                                        TabKind::Serial => {
+                                            if let Some((_, session)) = self.active_ssh_session() {
+                                                format!("serial / {}", session.name)
+                                            } else {
+                                                "serial".to_string()
+                                            }
+                                        }
                                     }
                                 } else {
                                     self.active_title()
@@ -1815,7 +1833,7 @@ impl Ashell {
                             .on_click(cx.listener(|this, _, _, cx| {
                                 this.sidebar_collapsed = false;
                                 this.config.set_sidebar_collapsed(false);
-                                let _ = this.config.save();
+                                this.save_preferences_background();
                                 cx.notify();
                             })),
                     ),
@@ -1984,7 +2002,7 @@ impl Ashell {
     ) -> impl IntoElement {
         let is_macos = cfg!(target_os = "macos");
         let is_fullscreen = window.is_fullscreen();
-        
+
         let is_active = cx.active_window() == Some(window.window_handle());
 
         h_flex()
@@ -1999,9 +2017,17 @@ impl Ashell {
                         .id("window-close")
                         .size(px(12.))
                         .rounded_full()
-                        .bg(if is_active { hsla(3.0 / 360.0, 1.0, 0.67, 1.0) } else { hsla(0.0, 0.0, 0.8, 1.0) }) // Red or Inactive Grey
-                        .group_hover("window-controls", |s| s.bg(hsla(3.0 / 360.0, 1.0, 0.67, 1.0)))
-                        .when(!is_macos, |this| this.window_control_area(gpui::WindowControlArea::Close))
+                        .bg(if is_active {
+                            hsla(3.0 / 360.0, 1.0, 0.67, 1.0)
+                        } else {
+                            hsla(0.0, 0.0, 0.8, 1.0)
+                        }) // Red or Inactive Grey
+                        .group_hover("window-controls", |s| {
+                            s.bg(hsla(3.0 / 360.0, 1.0, 0.67, 1.0))
+                        })
+                        .when(!is_macos, |this| {
+                            this.window_control_area(gpui::WindowControlArea::Close)
+                        })
                         .on_click(cx.listener(|this, _, window, cx| {
                             this.save_layout_state(window, cx);
                             window.remove_window();
@@ -2020,7 +2046,7 @@ impl Ashell {
                                 .text_color(hsla(3.0 / 360.0, 1.0, 0.15, 0.7))
                                 .opacity(0.0)
                                 .group_hover("window-controls", |s| s.opacity(1.0))
-                                .child("✕")
+                                .child("✕"),
                         ),
                 )
                 .child(
@@ -2028,9 +2054,17 @@ impl Ashell {
                         .id("window-minimize")
                         .size(px(12.))
                         .rounded_full()
-                        .bg(if is_active { hsla(39.0 / 360.0, 1.0, 0.59, 1.0) } else { hsla(0.0, 0.0, 0.8, 1.0) }) // Yellow or Inactive Grey
-                        .group_hover("window-controls", |s| s.bg(hsla(39.0 / 360.0, 1.0, 0.59, 1.0)))
-                        .when(!is_macos, |this| this.window_control_area(gpui::WindowControlArea::Min))
+                        .bg(if is_active {
+                            hsla(39.0 / 360.0, 1.0, 0.59, 1.0)
+                        } else {
+                            hsla(0.0, 0.0, 0.8, 1.0)
+                        }) // Yellow or Inactive Grey
+                        .group_hover("window-controls", |s| {
+                            s.bg(hsla(39.0 / 360.0, 1.0, 0.59, 1.0))
+                        })
+                        .when(!is_macos, |this| {
+                            this.window_control_area(gpui::WindowControlArea::Min)
+                        })
                         .on_click(|_, window, _| window.minimize_window())
                         .hover(|s| s.bg(hsla(39.0 / 360.0, 1.0, 0.49, 1.0)))
                         .active(|s| s.bg(hsla(39.0 / 360.0, 1.0, 0.39, 1.0)))
@@ -2046,7 +2080,7 @@ impl Ashell {
                                 .text_color(hsla(39.0 / 360.0, 1.0, 0.15, 0.8))
                                 .opacity(0.0)
                                 .group_hover("window-controls", |s| s.opacity(1.0))
-                                .child("−")
+                                .child("−"),
                         ),
                 )
                 .child(
@@ -2054,9 +2088,17 @@ impl Ashell {
                         .id("window-maximize")
                         .size(px(12.))
                         .rounded_full()
-                        .bg(if is_active { hsla(127.0 / 360.0, 0.68, 0.47, 1.0) } else { hsla(0.0, 0.0, 0.8, 1.0) }) // Green or Inactive Grey
-                        .group_hover("window-controls", |s| s.bg(hsla(127.0 / 360.0, 0.68, 0.47, 1.0)))
-                        .when(!is_macos, |this| this.window_control_area(gpui::WindowControlArea::Max))
+                        .bg(if is_active {
+                            hsla(127.0 / 360.0, 0.68, 0.47, 1.0)
+                        } else {
+                            hsla(0.0, 0.0, 0.8, 1.0)
+                        }) // Green or Inactive Grey
+                        .group_hover("window-controls", |s| {
+                            s.bg(hsla(127.0 / 360.0, 0.68, 0.47, 1.0))
+                        })
+                        .when(!is_macos, |this| {
+                            this.window_control_area(gpui::WindowControlArea::Max)
+                        })
                         .on_click(|_, window, _| {
                             if window.is_fullscreen() {
                                 window.toggle_fullscreen();
@@ -2081,7 +2123,7 @@ impl Ashell {
                                 .text_color(hsla(127.0 / 360.0, 1.0, 0.15, 0.8))
                                 .opacity(0.0)
                                 .group_hover("window-controls", |s| s.opacity(1.0))
-                                .child("+")
+                                .child("+"),
                         ),
                 )
             })
@@ -2315,11 +2357,12 @@ impl Ashell {
                     return this.render_home_page(cx).into_any_element();
                 }
                 let is_focused = path == this.focused_pane_path.as_slice();
+                let keyword_highlight = this.config.keyword_highlight();
                 let snapshot = this
                     .tabs
                     .iter()
                     .find(|t| &t.id == tab_id)
-                    .map(TerminalTab::render_snapshot);
+                    .map(|t| t.render_snapshot(keyword_highlight));
                 let Some(snapshot) = snapshot else {
                     return div().into_any_element();
                 };
@@ -2334,7 +2377,10 @@ impl Ashell {
                 let font_size = px(this.terminal_font_size);
                 let line_height = px(this.terminal_line_height());
                 let cell_width = px(this.terminal_cell_width());
-                let is_url_hovered = this.hovered_url.as_ref().map_or(false, |hu| hu.tab_id == *tab_id);
+                let is_url_hovered = this
+                    .hovered_url
+                    .as_ref()
+                    .map_or(false, |hu| hu.tab_id == *tab_id);
                 let mut el = div()
                     .size_full()
                     .overflow_hidden()
@@ -2375,44 +2421,38 @@ impl Ashell {
                     .and_then(|tab| tab.disconnected_reason.clone());
                 if let Some(reason) = disconnected_reason {
                     let tab_id_for_reconnect = tab_id.clone();
-                    el = div()
-                        .size_full()
-                        .relative()
-                        .child(el)
-                        .child(
-                            div()
-                                .absolute()
-                                .bottom_0()
-                                .left_0()
-                                .right_0()
+                    el = div().size_full().relative().child(el).child(
+                        div().absolute().bottom_0().left_0().right_0().child(
+                            h_flex()
+                                .w_full()
+                                .items_center()
+                                .gap_2()
+                                .px_3()
+                                .py_1()
+                                .bg(cx.theme().danger.opacity(0.15))
                                 .child(
-                                    h_flex()
-                                        .w_full()
-                                        .items_center()
-                                        .gap_2()
-                                        .px_3()
-                                        .py_1()
-                                        .bg(cx.theme().danger.opacity(0.15))
+                                    div()
+                                        .text_size(rems(0.85))
+                                        .text_color(cx.theme().danger)
                                         .child(
-                                            div()
-                                                .text_size(rems(0.85))
-                                                .text_color(cx.theme().danger)
-                                                .child(t!("session_disconnected", "reason" = reason).to_string()),
-                                        )
-                                        .child(
-                                            div()
-                                                .text_size(rems(0.85))
-                                                .text_color(cx.theme().muted_foreground)
-                                                .child(format!("— {}", t!("press_enter_to_reconnect"))),
-                                        )
-                                        .on_mouse_down(
-                                            MouseButton::Left,
-                                            cx.listener(move |this, _, _, cx| {
-                                                this.retry_disconnected_tab(&tab_id_for_reconnect, cx);
-                                            }),
+                                            t!("session_disconnected", "reason" = reason)
+                                                .to_string(),
                                         ),
+                                )
+                                .child(
+                                    div()
+                                        .text_size(rems(0.85))
+                                        .text_color(cx.theme().muted_foreground)
+                                        .child(format!("— {}", t!("press_enter_to_reconnect"))),
+                                )
+                                .on_mouse_down(
+                                    MouseButton::Left,
+                                    cx.listener(move |this, _, _, cx| {
+                                        this.retry_disconnected_tab(&tab_id_for_reconnect, cx);
+                                    }),
                                 ),
-                        );
+                        ),
+                    );
                 }
                 let indicator_color = this
                     .tabs
@@ -2606,7 +2646,7 @@ impl Render for Ashell {
             if let Some(scrollbar) = self.terminal_scrollbars.get(&active_id) {
                 if let Some(new_display_offset) = scrollbar.future_display_offset.take() {
                     if let Some(tab) = self.tabs.iter_mut().find(|tab| tab.id == active_id) {
-                        let current = tab.render_snapshot().display_offset;
+                        let current = tab.render_snapshot(false).display_offset;
                         match new_display_offset.cmp(&current) {
                             std::cmp::Ordering::Greater => {
                                 tab.scroll_up_by(new_display_offset - current)
@@ -2757,16 +2797,16 @@ impl Render for Ashell {
             .on_action(cx.listener(|this, _: &crate::ToggleSidebar, _, cx| {
                 this.sidebar_collapsed = !this.sidebar_collapsed;
                 this.config.set_sidebar_collapsed(this.sidebar_collapsed);
-                let _ = this.config.save();
+                this.save_preferences_background();
                 cx.notify();
             }))
             .on_action(cx.listener(|this, _: &crate::ToggleSftpZoom, window, cx| {
                 this.toggle_sftp_minimized(window, cx);
             }))
-            .on_action(cx.listener(|this, _: &crate::FocusPaneLeft, _, _| this.focus_adjacent_pane("left")))
-            .on_action(cx.listener(|this, _: &crate::FocusPaneRight, _, _| this.focus_adjacent_pane("right")))
-            .on_action(cx.listener(|this, _: &crate::FocusPaneUp, _, _| this.focus_adjacent_pane("up")))
-            .on_action(cx.listener(|this, _: &crate::FocusPaneDown, _, _| this.focus_adjacent_pane("down")))
+            .on_action(cx.listener(|this, _: &crate::FocusPaneLeft, _, cx| this.focus_adjacent_pane("left", cx)))
+            .on_action(cx.listener(|this, _: &crate::FocusPaneRight, _, cx| this.focus_adjacent_pane("right", cx)))
+            .on_action(cx.listener(|this, _: &crate::FocusPaneUp, _, cx| this.focus_adjacent_pane("up", cx)))
+            .on_action(cx.listener(|this, _: &crate::FocusPaneDown, _, cx| this.focus_adjacent_pane("down", cx)))
             .on_action(cx.listener(|this, _: &crate::SplitPaneLeft, _, cx| this.split_current_pane("left", cx)))
             .on_action(cx.listener(|this, _: &crate::SplitPaneRight, _, cx| this.split_current_pane("right", cx)))
             .on_action(cx.listener(|this, _: &crate::SplitPaneUp, _, cx| this.split_current_pane("up", cx)))
@@ -2819,7 +2859,6 @@ impl Render for Ashell {
                                 .flex_1()
                                 .min_w(px(0.))
                                 .h_full()
-                                .window_control_area(gpui::WindowControlArea::Drag)
                                 .on_double_click(|_, window, _| {
                                     #[cfg(target_os = "macos")]
                                     window.titlebar_double_click();

src/backend/mod.rs

@@ -1,2 +1,3 @@
 pub mod local;
+pub mod serial;
 pub mod ssh;

src/backend/serial.rs

@@ -0,0 +1,223 @@
+use crate::session::config::Session;
+use crate::terminal::{BackendCommand, BackendEvent};
+use std::io::{Read, Write};
+
+/// Spawn the serial port backend threads.
+/// Returns a sender to send commands (like keyboard inputs) to the serial port.
+pub fn spawn_serial_client(
+    _handle: &tokio::runtime::Handle,
+    tab_id: String,
+    session: Session,
+    events_tx: std::sync::mpsc::Sender<BackendEvent>,
+) -> tokio::sync::mpsc::UnboundedSender<BackendCommand> {
+    let (cmd_tx, mut cmd_rx) = tokio::sync::mpsc::unbounded_channel::<BackendCommand>();
+
+    let tab_id_clone = tab_id.clone();
+    let events_tx_clone = events_tx.clone();
+
+    std::thread::spawn(move || {
+        let _ = events_tx_clone.send(BackendEvent::Status {
+            tab_id: tab_id_clone.clone(),
+            text: rust_i18n::t!("starting_connection").to_string(),
+        });
+
+        let port_name = session.host;
+        let baud_rate = session.baud_rate;
+
+        tracing::info!(
+            "[serial] opening port {} at baud rate {}",
+            port_name,
+            baud_rate
+        );
+
+        let mut port_result = serialport::new(&port_name, baud_rate)
+            .timeout(std::time::Duration::from_millis(100))
+            .open();
+
+        if port_result.is_err() && baud_rate != 0 {
+            tracing::info!(
+                "[serial] failed to open port with baud rate {}, retrying with 0 (virtual port mode)",
+                baud_rate
+            );
+            port_result = serialport::new(&port_name, 0)
+                .timeout(std::time::Duration::from_millis(100))
+                .open();
+        }
+
+        let mut port = match port_result {
+            Ok(p) => p,
+            Err(e) => {
+                tracing::error!("[serial] failed to open port {}: {}", port_name, e);
+                let _ = events_tx_clone.send(BackendEvent::Closed {
+                    tab_id: tab_id_clone,
+                    reason: format!("Failed to open serial port {port_name}: {e}"),
+                });
+                return;
+            }
+        };
+
+        let mut port_write = match port.try_clone() {
+            Ok(pw) => pw,
+            Err(e) => {
+                tracing::error!("[serial] failed to clone port: {}", e);
+                let _ = events_tx_clone.send(BackendEvent::Closed {
+                    tab_id: tab_id_clone,
+                    reason: format!("Failed to clone serial port: {e}"),
+                });
+                return;
+            }
+        };
+
+        // Notify connected
+        let _ = events_tx_clone.send(BackendEvent::Connected {
+            tab_id: tab_id_clone.clone(),
+        });
+
+        // Spawn write thread
+        let tab_id_write = tab_id_clone.clone();
+        let events_tx_write = events_tx_clone.clone();
+        std::thread::spawn(move || {
+            while let Some(cmd) = cmd_rx.blocking_recv() {
+                match cmd {
+                    BackendCommand::Input(bytes) => {
+                        if let Err(e) = port_write.write_all(&bytes) {
+                            tracing::error!("[serial] write error: {}", e);
+                            let _ = events_tx_write.send(BackendEvent::Closed {
+                                tab_id: tab_id_write.clone(),
+                                reason: format!("Serial write error: {e}"),
+                            });
+                            break;
+                        }
+                        let _ = port_write.flush();
+                    }
+                    BackendCommand::Close => break,
+                    _ => {}
+                }
+            }
+        });
+
+        // Read loop in current thread
+        let mut buf = [0u8; 1024];
+        let mut last_was_cr = false;
+        loop {
+            match port.read(&mut buf) {
+                Ok(n) if n > 0 => {
+                    let mut processed = Vec::with_capacity(n * 2);
+                    let read_bytes = &buf[..n];
+                    for i in 0..n {
+                        let b = read_bytes[i];
+                        if b == b'\n' {
+                            let prev_was_cr = if i > 0 {
+                                read_bytes[i - 1] == b'\r'
+                            } else {
+                                last_was_cr
+                            };
+                            if !prev_was_cr {
+                                processed.push(b'\r');
+                            }
+                        }
+                        processed.push(b);
+                    }
+                    last_was_cr = read_bytes[n - 1] == b'\r';
+
+                    let _ = events_tx_clone.send(BackendEvent::Output {
+                        tab_id: tab_id_clone.clone(),
+                        bytes: processed,
+                    });
+                }
+                Ok(_) => {}
+                Err(ref e) if e.kind() == std::io::ErrorKind::TimedOut => {}
+                Err(e) => {
+                    tracing::info!("[serial] port read error/closed: {}", e);
+                    let _ = events_tx_clone.send(BackendEvent::Closed {
+                        tab_id: tab_id_clone,
+                        reason: format!("Serial read error: {e}"),
+                    });
+                    break;
+                }
+            }
+        }
+    });
+
+    cmd_tx
+}
+
+#[cfg(all(test, unix))]
+mod tests {
+    use super::*;
+    use portable_pty::{NativePtySystem, PtySize, PtySystem};
+
+    #[tokio::test]
+    async fn test_serial_read_write_simulation() {
+        // 1. Create a PTY pair using portable-pty to simulate a serial device
+        let pty_system = NativePtySystem::default();
+        let pair = pty_system
+            .openpty(PtySize {
+                rows: 24,
+                cols: 80,
+                pixel_width: 0,
+                pixel_height: 0,
+            })
+            .unwrap();
+
+        // On macOS/Linux, the slave name path behaves like a TTY device.
+        let fd = pair.master.as_raw_fd().unwrap();
+        let slave_name = unsafe {
+            let ptr = libc::ptsname(fd);
+            assert!(!ptr.is_null());
+            std::ffi::CStr::from_ptr(ptr).to_string_lossy().into_owned()
+        };
+        println!("Simulating serial device on PTY slave path: {}", slave_name);
+
+        // 2. Spawn the serial backend targeting the PTY slave path
+        let (events_tx, events_rx) = std::sync::mpsc::channel();
+        let handle = tokio::runtime::Handle::current();
+        let session = Session::serial(slave_name, 0);
+        let cmd_tx = spawn_serial_client(&handle, "test-tab".to_string(), session, events_tx);
+
+        // Wait for the Status event
+        let status_event = events_rx.recv_timeout(std::time::Duration::from_secs(2));
+        assert!(status_event.is_ok(), "Failed to receive Status event");
+        if let Ok(BackendEvent::Status { tab_id, .. }) = status_event {
+            assert_eq!(tab_id, "test-tab");
+        } else {
+            panic!("Expected Status event, got: {:?}", status_event);
+        }
+
+        // Wait for the Connected event
+        let connected_event = events_rx.recv_timeout(std::time::Duration::from_secs(2));
+        assert!(connected_event.is_ok(), "Failed to receive Connected event");
+        if let Ok(BackendEvent::Connected { tab_id }) = connected_event {
+            assert_eq!(tab_id, "test-tab");
+        } else {
+            panic!("Expected Connected event, got: {:?}", connected_event);
+        }
+
+        // 3. Test Reading: Write to PTY master, verify serial backend outputs it to UI
+        let mut master_writer = pair.master.take_writer().unwrap();
+        master_writer.write_all(b"hello serial simulator").unwrap();
+        master_writer.flush().unwrap();
+
+        let output_event = events_rx.recv_timeout(std::time::Duration::from_secs(2));
+        assert!(output_event.is_ok(), "Failed to receive Output event");
+        if let Ok(BackendEvent::Output { tab_id, bytes }) = output_event {
+            assert_eq!(tab_id, "test-tab");
+            assert_eq!(bytes, b"hello serial simulator");
+        } else {
+            panic!("Expected Output event");
+        }
+
+        // 4. Test Writing: Send BackendCommand::Input to backend, verify PTY master reads it
+        cmd_tx
+            .send(BackendCommand::Input(b"world serial simulator".to_vec()))
+            .unwrap();
+
+        let mut master_reader = pair.master.try_clone_reader().unwrap();
+        let mut read_buf = [0u8; 128];
+        let bytes_read = master_reader.read(&mut read_buf).unwrap();
+        assert_eq!(&read_buf[..bytes_read], b"world serial simulator");
+
+        // 5. Clean up
+        cmd_tx.send(BackendCommand::Close).unwrap();
+    }
+}

src/backend/ssh.rs

@@ -9,12 +9,18 @@ use directories::BaseDirs;
 use russh::{
     ChannelMsg, Disconnect,
     client::{self, Handler},
-    keys::{HashAlg, PrivateKey, decode_secret_key, key::PrivateKeyWithHashAlg, load_secret_key},
+    keys::{PrivateKey, decode_secret_key, load_secret_key},
 };
 use tokio::sync::mpsc;
 
 use crate::{
-    session::config::{AuthMethod, Session},
+    session::{
+        config::{AuthMethod, Session},
+        ssh_keys::{
+            authenticate_with_default_keys, normalize_inline_private_key, private_keys_with_algs,
+            session_has_explicit_key,
+        },
+    },
     system::{SystemSnapshot, remote_snapshot_from_kv},
     terminal::{BackendCommand, BackendEvent, BackendTx},
 };
@@ -219,9 +225,9 @@ async fn connect_and_authenticate(
     events: &std::sync::mpsc::Sender<BackendEvent>,
 ) -> Result<russh::client::Handle<ClientHandler>> {
     let config = Arc::new(client::Config {
-        inactivity_timeout: Some(std::time::Duration::from_secs(600)),
-        keepalive_interval: Some(std::time::Duration::from_secs(3)),
-        keepalive_max: 2,
+        inactivity_timeout: None,
+        keepalive_interval: Some(std::time::Duration::from_secs(5)),
+        keepalive_max: 3,
         ..Default::default()
     });
     let addr = format!("{}:{}", session.host, session.port);
@@ -230,12 +236,18 @@ async fn connect_and_authenticate(
         addr,
         session.user
     );
-    let status_text = if let Some((ptype, phost, pport)) = crate::session::config::active_proxy(session) {
-        let pport_val = pport.unwrap_or_else(|| if ptype == "http" { 8080 } else { 1080 });
-        format!("connecting to {addr} via {} proxy {}:{}", ptype.to_uppercase(), phost, pport_val)
-    } else {
-        format!("opening tcp connection to {addr}")
-    };
+    let status_text =
+        if let Some((ptype, phost, pport)) = crate::session::config::active_proxy(session) {
+            let pport_val = pport.unwrap_or_else(|| if ptype == "http" { 8080 } else { 1080 });
+            format!(
+                "connecting to {addr} via {} proxy {}:{}",
+                ptype.to_uppercase(),
+                phost,
+                pport_val
+            )
+        } else {
+            format!("opening tcp connection to {addr}")
+        };
     let _ = events.send(BackendEvent::Status {
         tab_id: tab_id.to_string(),
         text: status_text,
@@ -267,7 +279,12 @@ async fn connect_and_authenticate(
                 .context("password authentication failed")?
         }
         AuthMethod::Key => {
-            let source = key_source_label(session);
+            let has_explicit_key = session_has_explicit_key(session);
+            let source = if has_explicit_key {
+                key_source_label(session)
+            } else {
+                "~/.ssh/ default keys".to_string()
+            };
             tracing::info!(
                 "[ssh] sending key authentication for {}@{} (key source: {})",
                 session.user,
@@ -276,44 +293,143 @@ async fn connect_and_authenticate(
             );
             let _ = events.send(BackendEvent::Status {
                 tab_id: tab_id.to_string(),
-                text: format!("connected to {addr}, loading private key from {source}"),
+                text: if has_explicit_key {
+                    format!("connected to {addr}, loading private key from {source}")
+                } else {
+                    format!(
+                        "connected to {addr}, trying default keys from ~/.ssh/ for {}",
+                        session.user
+                    )
+                },
             });
-            let keypair = load_session_private_key(session)?;
-            let algorithm = format!("{:?}", keypair.algorithm());
-            let _ = events.send(BackendEvent::Status {
-                tab_id: tab_id.to_string(),
-                text: format!("private key loaded from {source}, algorithm {algorithm}, sending public key authentication for {}", session.user),
-            });
-            let keys = private_keys_with_algs(keypair).context("invalid private key")?;
-            let mut success = false;
-            for key in keys {
-                match handle.authenticate_publickey(&session.user, key).await {
-                    Ok(true) => {
-                        success = true;
-                        break;
-                    }
-                    Ok(false) => {
-                        tracing::debug!("[ssh] public key auth failed with algorithm, trying next");
-                        continue;
-                    }
-                    Err(e) => {
-                        tracing::debug!("[ssh] public key auth error: {:?}, trying next", e);
-                        continue;
+
+            let passphrase = session.passphrase.trim();
+            let passphrase = (!passphrase.is_empty()).then_some(passphrase);
+
+            let success = if has_explicit_key {
+                let keypair = load_session_private_key(session)?;
+                let algorithm = format!("{:?}", keypair.algorithm());
+                let _ = events.send(BackendEvent::Status {
+                    tab_id: tab_id.to_string(),
+                    text: format!("private key loaded from {source}, algorithm {algorithm}, sending public key authentication for {}", session.user),
+                });
+                let keys = private_keys_with_algs(keypair).context("invalid private key")?;
+                let mut success = false;
+                for key in keys {
+                    match handle.authenticate_publickey(&session.user, key).await {
+                        Ok(true) => {
+                            success = true;
+                            break;
+                        }
+                        Ok(false) => {
+                            tracing::debug!(
+                                "[ssh] public key auth failed with algorithm, trying next"
+                            );
+                            continue;
+                        }
+                        Err(e) => {
+                            tracing::debug!("[ssh] public key auth error: {:?}, trying next", e);
+                            continue;
+                        }
                     }
                 }
-            }
-            if !success {
-                return Err(anyhow::anyhow!(
-                    "public key authentication failed for {}@{}:{} using {} ({})",
-                    session.user,
-                    session.host,
-                    session.port,
-                    source,
-                    algorithm
-                ));
-            }
+                if !success {
+                    return Err(anyhow::anyhow!(
+                        "public key authentication failed for {}@{}:{} using {} ({})",
+                        session.user,
+                        session.host,
+                        session.port,
+                        source,
+                        algorithm
+                    ));
+                }
+                success
+            } else {
+                let success =
+                    authenticate_with_default_keys(&mut handle, &session.user, passphrase).await?;
+                if !success {
+                    return Err(anyhow::anyhow!(
+                        "public key authentication failed for {}@{}:{} - no valid default key found in ~/.ssh/",
+                        session.user,
+                        session.host,
+                        session.port
+                    ));
+                }
+                success
+            };
             success
         }
+        AuthMethod::Config => {
+            // SSH Config auth: try the identity file from config, or default keys
+            let source = key_source_label(session);
+            tracing::info!(
+                "[ssh] sending ssh-config authentication for {}@{} (key source: {})",
+                session.user,
+                addr,
+                source
+            );
+            let _ = events.send(BackendEvent::Status {
+                tab_id: tab_id.to_string(),
+                text: format!("connected to {addr}, loading private key from {source}"),
+            });
+
+            // If an explicit key path is set from the SSH config IdentityFile, use it;
+            // otherwise try default keys from ~/.ssh/
+            // Note: for Config auth, we never use inline key content
+            let has_explicit_key = !session.private_key_path.trim().is_empty();
+            if has_explicit_key {
+                let keypair = load_session_private_key(session)?;
+                let algorithm = format!("{:?}", keypair.algorithm());
+                let keys = private_keys_with_algs(keypair).context("invalid private key")?;
+                let mut success = false;
+                for key in keys {
+                    match handle.authenticate_publickey(&session.user, key).await {
+                        Ok(true) => {
+                            success = true;
+                            break;
+                        }
+                        Ok(false) => {
+                            continue;
+                        }
+                        Err(_) => {
+                            continue;
+                        }
+                    }
+                }
+                if !success {
+                    return Err(anyhow::anyhow!(
+                        "ssh-config key authentication failed for {}@{}:{} using {} ({})",
+                        session.user,
+                        session.host,
+                        session.port,
+                        source,
+                        algorithm
+                    ));
+                }
+                success
+            } else {
+                let passphrase = session.passphrase.trim();
+                let passphrase = (!passphrase.is_empty()).then_some(passphrase);
+                let _ = events.send(BackendEvent::Status {
+                    tab_id: tab_id.to_string(),
+                    text: format!(
+                        "connected to {addr}, trying default keys from ~/.ssh/ for {}",
+                        session.user
+                    ),
+                });
+                let success =
+                    authenticate_with_default_keys(&mut handle, &session.user, passphrase).await?;
+                if !success {
+                    return Err(anyhow::anyhow!(
+                        "ssh-config authentication failed for {}@{}:{} - no valid default key found",
+                        session.user,
+                        session.host,
+                        session.port
+                    ));
+                }
+                success
+            }
+        }
     };
 
     if !authed {
@@ -335,6 +451,10 @@ async fn connect_and_authenticate(
                     session.port,
                     key_source_label(session)
                 ),
+                AuthMethod::Config => format!(
+                    "authentication failed: server rejected ssh-config authentication for {}@{}:{}",
+                    session.user, session.host, session.port
+                ),
             }
         ));
     }
@@ -387,47 +507,6 @@ fn load_session_private_key(session: &Session) -> Result<PrivateKey> {
     Err(anyhow!(errors.join("; ")))
 }
 
-fn private_keys_with_algs(keypair: PrivateKey) -> Result<Vec<PrivateKeyWithHashAlg>> {
-    let mut algs = Vec::new();
-    let key_arc = Arc::new(keypair);
-
-    if key_arc.algorithm().is_rsa() {
-        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), Some(HashAlg::Sha512)) {
-            algs.push(k);
-        }
-        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), Some(HashAlg::Sha256)) {
-            algs.push(k);
-        }
-        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), None) {
-            algs.push(k);
-        }
-    } else {
-        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), None) {
-            algs.push(k);
-        }
-    }
-
-    if algs.is_empty() {
-        return Err(anyhow!(
-            "Failed to construct PrivateKeyWithHashAlg for any supported hash algorithm"
-        ));
-    }
-
-    Ok(algs)
-}
-
-fn normalize_inline_private_key(value: &str) -> String {
-    let mut normalized = value
-        .trim()
-        .replace("\\r\\n", "\n")
-        .replace("\\n", "\n")
-        .replace("\r\n", "\n");
-    if !normalized.ends_with('\n') {
-        normalized.push('\n');
-    }
-    normalized
-}
-
 fn expand_key_path(value: &str) -> Option<PathBuf> {
     if value.is_empty() {
         return None;

src/main.rs

@@ -16,14 +16,12 @@ rust_i18n::i18n!("locales", fallback = "en");
 gpui::actions!(ashell_terminal, [TerminalTabKey, TerminalBacktabKey]);
 
 pub(crate) use app::keybinding_recorder::{
-    ClosePane, FocusPaneDown, FocusPaneLeft, FocusPaneRight, FocusPaneUp, NewSsh, OpenSearch,
-    OpenSession, OpenSettings, OpenTransfers, SplitPaneDown, SplitPaneLeft, SplitPaneRight,
-    SplitPaneUp, ToggleSftpZoom, ToggleSidebar, Copy, Paste,
+    ClosePane, Copy, FocusPaneDown, FocusPaneLeft, FocusPaneRight, FocusPaneUp, NewSsh, OpenSearch,
+    OpenSession, OpenSettings, OpenTransfers, Paste, SplitPaneDown, SplitPaneLeft, SplitPaneRight,
+    SplitPaneUp, ToggleSftpZoom, ToggleSidebar,
 };
 
-pub(crate) use app::{
-    Ashell, PaneLayout, SelectorEntry, SftpContextMenuState, TabGroup,
-};
+pub(crate) use app::{Ashell, PaneLayout, SelectorEntry, SftpContextMenuState, TabGroup};
 
 fn main() {
     app::startup::sync_macos_launch_environment();

src/session/config.rs

@@ -1,7 +1,14 @@
-use std::{fs, path::PathBuf};
+use std::{fs, path::PathBuf, sync::OnceLock};
 
 use anyhow::{Context, Result};
+use argon2::Argon2;
+use base64::{Engine as _, engine::general_purpose::STANDARD};
+use chacha20poly1305::{
+    XChaCha20Poly1305, XNonce,
+    aead::{Aead, KeyInit},
+};
 use directories::BaseDirs;
+use rand::{RngCore, rngs::OsRng};
 use serde::{Deserialize, Serialize};
 use uuid::Uuid;
 
@@ -10,6 +17,15 @@ use uuid::Uuid;
 pub enum AuthMethod {
     Password,
     Key,
+    Config,
+}
+
+fn default_protocol() -> String {
+    "ssh".to_string()
+}
+
+fn default_baud_rate() -> u32 {
+    115200
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -40,6 +56,10 @@ pub struct Session {
     pub proxy_user: String,
     #[serde(default)]
     pub proxy_password: String,
+    #[serde(default = "default_protocol")]
+    pub protocol: String,
+    #[serde(default = "default_baud_rate")]
+    pub baud_rate: u32,
 }
 
 impl Session {
@@ -62,6 +82,8 @@ impl Session {
             proxy_port: None,
             proxy_user: String::new(),
             proxy_password: String::new(),
+            protocol: "ssh".to_string(),
+            baud_rate: 115200,
         }
     }
 
@@ -91,6 +113,32 @@ impl Session {
             proxy_port: None,
             proxy_user: String::new(),
             proxy_password: String::new(),
+            protocol: "ssh".to_string(),
+            baud_rate: 115200,
+        }
+    }
+
+    pub fn serial(port_name: String, baud_rate: u32) -> Self {
+        let name = format!("serial://{port_name}@{baud_rate}");
+        Self {
+            id: Uuid::new_v4().to_string(),
+            name,
+            host: port_name,
+            port: 0,
+            user: String::new(),
+            auth: AuthMethod::Password,
+            password: String::new(),
+            private_key_path: String::new(),
+            private_key_inline: String::new(),
+            passphrase: String::new(),
+            last_used: None,
+            proxy_type: "none".to_string(),
+            proxy_host: String::new(),
+            proxy_port: None,
+            proxy_user: String::new(),
+            proxy_password: String::new(),
+            protocol: "serial".to_string(),
+            baud_rate,
         }
     }
 }
@@ -316,9 +364,10 @@ impl Default for ConfigFile {
     }
 }
 
+#[derive(Clone)]
 pub struct ConfigStore {
-    path: PathBuf,
-    cache: ConfigFile,
+    pub(crate) path: PathBuf,
+    pub(crate) cache: ConfigFile,
 }
 
 impl ConfigStore {
@@ -343,26 +392,33 @@ impl ConfigStore {
         }
 
         let mut cache = if path.exists() {
-            let raw = fs::read_to_string(&path)
-                .with_context(|| format!("failed to read {}", path.display()))?;
-            match serde_json::from_str::<ConfigFile>(&raw) {
+            let raw_bytes =
+                fs::read(&path).with_context(|| format!("failed to read {}", path.display()))?;
+            let hardware_uuid = get_hardware_uuid();
+            match decrypt_config(&raw_bytes, &hardware_uuid) {
                 Ok(cache) => cache,
-                Err(err) => {
-                    let backup_path = path.with_extension("json.bak");
-                    if let Err(backup_err) = fs::write(&backup_path, raw.as_bytes()) {
-                        tracing::warn!(
-                            "failed to parse config {}; backup to {} also failed: {backup_err:#}; parse error: {err:#}",
-                            path.display(),
-                            backup_path.display(),
-                        );
-                    } else {
-                        tracing::warn!(
-                            "failed to parse config {}; backed up the original to {} and loaded defaults: {err:#}",
-                            path.display(),
-                            backup_path.display(),
-                        );
+                Err(decrypt_err) => {
+                    // Fallback to plain text JSON if decryption/parsing failed
+                    match serde_json::from_slice::<ConfigFile>(&raw_bytes) {
+                        Ok(cache) => cache,
+                        Err(json_err) => {
+                            let backup_path = path.with_extension("json.bak");
+                            if let Err(backup_err) = fs::write(&backup_path, &raw_bytes) {
+                                tracing::warn!(
+                                    "failed to parse config {} (decrypt err: {decrypt_err:#}, json err: {json_err:#}); backup to {} also failed: {backup_err:#}",
+                                    path.display(),
+                                    backup_path.display(),
+                                );
+                            } else {
+                                tracing::warn!(
+                                    "failed to parse config {} (decrypt err: {decrypt_err:#}, json err: {json_err:#}); backed up the original to {} and loaded defaults",
+                                    path.display(),
+                                    backup_path.display(),
+                                );
+                            }
+                            ConfigFile::default()
+                        }
                     }
-                    ConfigFile::default()
                 }
             }
         } else {
@@ -438,7 +494,11 @@ impl ConfigStore {
     }
 
     pub fn sync_s3_region(&self) -> &str {
-        if self.cache.sync_s3_region.is_empty() { "us-east-1" } else { &self.cache.sync_s3_region }
+        if self.cache.sync_s3_region.is_empty() {
+            "us-east-1"
+        } else {
+            &self.cache.sync_s3_region
+        }
     }
 
     pub fn sync_s3_bucket(&self) -> &str {
@@ -446,7 +506,11 @@ impl ConfigStore {
     }
 
     pub fn sync_s3_object_key(&self) -> &str {
-        if self.cache.sync_s3_object_key.is_empty() { "ashell-sync.json" } else { &self.cache.sync_s3_object_key }
+        if self.cache.sync_s3_object_key.is_empty() {
+            "ashell-sync.json"
+        } else {
+            &self.cache.sync_s3_object_key
+        }
     }
 
     pub fn set_sync_connection(&mut self, endpoint: String, username: String) {
@@ -749,8 +813,68 @@ impl ConfigStore {
         if self.path.as_os_str().is_empty() {
             return Ok(());
         }
-        let raw = serde_json::to_string_pretty(&self.cache)?;
-        fs::write(&self.path, raw)
+        let hardware_uuid = get_hardware_uuid();
+        let encrypted_bytes = encrypt_config(&self.cache, &hardware_uuid)?;
+        fs::write(&self.path, encrypted_bytes)
+            .with_context(|| format!("failed to write {}", self.path.display()))?;
+
+        #[cfg(unix)]
+        {
+            use std::os::unix::fs::PermissionsExt;
+            if let Ok(mut perms) = fs::metadata(&self.path).map(|m| m.permissions()) {
+                perms.set_mode(0o600);
+                let _ = fs::set_permissions(&self.path, perms);
+            }
+        }
+
+        Ok(())
+    }
+
+    pub fn save_merged_preferences(&self, local_config: ConfigFile) -> Result<()> {
+        if self.path.as_os_str().is_empty() {
+            return Ok(());
+        }
+        let hardware_uuid = get_hardware_uuid();
+
+        let mut disk_config = if self.path.exists() {
+            if let Ok(raw_bytes) = fs::read(&self.path) {
+                match decrypt_config(&raw_bytes, &hardware_uuid) {
+                    Ok(loaded) => loaded,
+                    Err(_) => serde_json::from_slice::<ConfigFile>(&raw_bytes)
+                        .unwrap_or_else(|_| self.cache.clone()),
+                }
+            } else {
+                self.cache.clone()
+            }
+        } else {
+            self.cache.clone()
+        };
+
+        // Merge UI preference fields
+        disk_config.follow_system_theme = local_config.follow_system_theme;
+        disk_config.theme_mode = local_config.theme_mode;
+        disk_config.light_theme_name = local_config.light_theme_name;
+        disk_config.dark_theme_name = local_config.dark_theme_name;
+        disk_config.locale = local_config.locale;
+        disk_config.terminal_font_size = local_config.terminal_font_size;
+        disk_config.ui_font_size = local_config.ui_font_size;
+        disk_config.right_click_copy_paste = local_config.right_click_copy_paste;
+        disk_config.keyword_highlight = local_config.keyword_highlight;
+        disk_config.ui_font_family = local_config.ui_font_family;
+        disk_config.terminal_font_family = local_config.terminal_font_family;
+        disk_config.title_bar_style = local_config.title_bar_style;
+        disk_config.cursor_style = local_config.cursor_style;
+        disk_config.window_bounds = local_config.window_bounds;
+        disk_config.workspace_panels = local_config.workspace_panels;
+        disk_config.body_panels = local_config.body_panels;
+        disk_config.show_hidden_files = local_config.show_hidden_files;
+        disk_config.lock_layout = local_config.lock_layout;
+        disk_config.monitoring_position = local_config.monitoring_position;
+        disk_config.sidebar_collapsed = local_config.sidebar_collapsed;
+        disk_config.sftp_panel_minimized = local_config.sftp_panel_minimized;
+
+        let encrypted_bytes = encrypt_config(&disk_config, &hardware_uuid)?;
+        fs::write(&self.path, encrypted_bytes)
             .with_context(|| format!("failed to write {}", self.path.display()))?;
 
         #[cfg(unix)]
@@ -766,10 +890,14 @@ impl ConfigStore {
     }
 }
 
-pub trait ProxyStream: tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin + Send + Sync + 'static {}
-impl<T: tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin + Send + Sync + 'static> ProxyStream for T {}
-
-use std::sync::OnceLock;
+pub trait ProxyStream:
+    tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin + Send + Sync + 'static
+{
+}
+impl<T: tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin + Send + Sync + 'static> ProxyStream
+    for T
+{
+}
 
 #[derive(Debug, Clone)]
 pub struct EnvProxy {
@@ -783,110 +911,126 @@ pub struct EnvProxy {
 pub static ENV_PROXY: OnceLock<Option<EnvProxy>> = OnceLock::new();
 
 pub async fn connect_proxy(session: &Session) -> Result<Box<dyn ProxyStream>> {
-    let target_host = &session.host;
+    let target_host = session.host.clone();
     let target_port = session.port;
+    let session = session.clone();
 
-    let config = ConfigStore::load().unwrap_or_else(|_| ConfigStore::in_memory());
-    let (proxy_type, proxy_host, proxy_port, proxy_user, proxy_password) = {
-        if !session.proxy_type.is_empty() && session.proxy_type != "none" {
-            (
-                session.proxy_type.clone(),
-                session.proxy_host.clone(),
-                session.proxy_port,
-                session.proxy_user.clone(),
-                session.proxy_password.clone(),
-            )
-        } else if config.cache.read_env_proxy && ENV_PROXY.get().and_then(|opt| opt.as_ref()).is_some() {
-            let env_p = ENV_PROXY.get().and_then(|opt| opt.as_ref()).unwrap();
-            (
-                env_p.proxy_type.clone(),
-                env_p.host.clone(),
-                env_p.port,
-                env_p.user.clone(),
-                env_p.pass.clone(),
-            )
-        } else if config.cache.use_proxy {
-            (
-                config.cache.global_proxy_type.clone(),
-                config.cache.global_proxy_host.clone(),
-                config.cache.global_proxy_port,
-                config.cache.global_proxy_user.clone(),
-                config.cache.global_proxy_password.clone(),
-            )
-        } else {
-            ("none".to_string(), String::new(), None, String::new(), String::new())
-        }
-    };
-    
-    if proxy_type != "none" && (proxy_host.is_empty() || proxy_port.is_none()) {
-        let addr = format!("{}:{}", target_host, target_port);
-        let stream = tokio::net::TcpStream::connect(&addr).await?;
-        return Ok(Box::new(stream));
-    }
-
-    match proxy_type.as_str() {
-        "socks5" | "socks5h" => {
-            let proxy_port = proxy_port.unwrap_or(1080);
-            let proxy_addr = format!("{}:{}", proxy_host, proxy_port);
-
-            if !proxy_user.is_empty() {
-                let stream = tokio_socks::tcp::Socks5Stream::connect_with_password(
-                    proxy_addr.as_str(),
-                    (target_host.as_str(), target_port),
-                    &proxy_user,
-                    &proxy_password,
+    let connect_fut = async move {
+        let target_host = &target_host;
+        let config = ConfigStore::load().unwrap_or_else(|_| ConfigStore::in_memory());
+        let (proxy_type, proxy_host, proxy_port, proxy_user, proxy_password) = {
+            if !session.proxy_type.is_empty() && session.proxy_type != "none" {
+                (
+                    session.proxy_type.clone(),
+                    session.proxy_host.clone(),
+                    session.proxy_port,
+                    session.proxy_user.clone(),
+                    session.proxy_password.clone(),
+                )
+            } else if config.cache.read_env_proxy
+                && ENV_PROXY.get().and_then(|opt| opt.as_ref()).is_some()
+            {
+                let env_p = ENV_PROXY.get().and_then(|opt| opt.as_ref()).unwrap();
+                (
+                    env_p.proxy_type.clone(),
+                    env_p.host.clone(),
+                    env_p.port,
+                    env_p.user.clone(),
+                    env_p.pass.clone(),
+                )
+            } else if config.cache.use_proxy {
+                (
+                    config.cache.global_proxy_type.clone(),
+                    config.cache.global_proxy_host.clone(),
+                    config.cache.global_proxy_port,
+                    config.cache.global_proxy_user.clone(),
+                    config.cache.global_proxy_password.clone(),
                 )
-                .await
-                .map_err(|e| anyhow::anyhow!("SOCKS5 proxy connection failed: {}", e))?;
-                Ok(Box::new(stream))
             } else {
-                let stream = tokio_socks::tcp::Socks5Stream::connect(
-                    proxy_addr.as_str(),
-                    (target_host.as_str(), target_port),
+                (
+                    "none".to_string(),
+                    String::new(),
+                    None,
+                    String::new(),
+                    String::new(),
                 )
-                .await
-                .map_err(|e| anyhow::anyhow!("SOCKS5 proxy connection failed: {}", e))?;
-                Ok(Box::new(stream))
             }
-        }
-        "http" => {
-            let proxy_port = proxy_port.unwrap_or(8080);
-            let proxy_addr = format!("{}:{}", proxy_host, proxy_port);
+        };
 
-            use tokio::io::AsyncWriteExt;
-            let mut stream = tokio::net::TcpStream::connect(&proxy_addr)
-                .await
-                .map_err(|e| anyhow::anyhow!("HTTP proxy connection failed: {}", e))?;
-
-            let mut request = format!(
-                "CONNECT {}:{} HTTP/1.1\r\nHost: {}:{}\r\n",
-                target_host, target_port, target_host, target_port
-            );
-            if !proxy_user.is_empty() {
-                use base64::Engine as _;
-                let auth = format!("{}:{}", proxy_user, proxy_password);
-                let encoded = base64::engine::general_purpose::STANDARD.encode(auth);
-                request.push_str(&format!("Proxy-Authorization: Basic {}\r\n", encoded));
-            }
-            request.push_str("\r\n");
-
-            stream.write_all(request.as_bytes()).await?;
-
-            let mut response = [0u8; 1024];
-            let n = tokio::io::AsyncReadExt::read(&mut stream, &mut response).await?;
-            let resp_str = String::from_utf8_lossy(&response[..n]);
-            if !resp_str.contains("200") && !resp_str.contains("established") {
-                return Err(anyhow::anyhow!("HTTP proxy CONNECT failed: {}", resp_str));
-            }
-
-            Ok(Box::new(stream))
-        }
-        _ => {
+        if proxy_type != "none" && (proxy_host.is_empty() || proxy_port.is_none()) {
             let addr = format!("{}:{}", target_host, target_port);
             let stream = tokio::net::TcpStream::connect(&addr).await?;
-            Ok(Box::new(stream))
+            return Ok(Box::new(stream) as Box<dyn ProxyStream>);
         }
-    }
+
+        match proxy_type.as_str() {
+            "socks5" | "socks5h" => {
+                let proxy_port = proxy_port.unwrap_or(1080);
+                let proxy_addr = format!("{}:{}", proxy_host, proxy_port);
+
+                if !proxy_user.is_empty() {
+                    let stream = tokio_socks::tcp::Socks5Stream::connect_with_password(
+                        proxy_addr.as_str(),
+                        (target_host.as_str(), target_port),
+                        &proxy_user,
+                        &proxy_password,
+                    )
+                    .await
+                    .map_err(|e| anyhow::anyhow!("SOCKS5 proxy connection failed: {}", e))?;
+                    Ok(Box::new(stream) as Box<dyn ProxyStream>)
+                } else {
+                    let stream = tokio_socks::tcp::Socks5Stream::connect(
+                        proxy_addr.as_str(),
+                        (target_host.as_str(), target_port),
+                    )
+                    .await
+                    .map_err(|e| anyhow::anyhow!("SOCKS5 proxy connection failed: {}", e))?;
+                    Ok(Box::new(stream) as Box<dyn ProxyStream>)
+                }
+            }
+            "http" => {
+                let proxy_port = proxy_port.unwrap_or(8080);
+                let proxy_addr = format!("{}:{}", proxy_host, proxy_port);
+
+                use tokio::io::AsyncWriteExt;
+                let mut stream = tokio::net::TcpStream::connect(&proxy_addr)
+                    .await
+                    .map_err(|e| anyhow::anyhow!("HTTP proxy connection failed: {}", e))?;
+
+                let mut request = format!(
+                    "CONNECT {}:{} HTTP/1.1\r\nHost: {}:{}\r\n",
+                    target_host, target_port, target_host, target_port
+                );
+                if !proxy_user.is_empty() {
+                    use base64::Engine as _;
+                    let auth = format!("{}:{}", proxy_user, proxy_password);
+                    let encoded = base64::engine::general_purpose::STANDARD.encode(auth);
+                    request.push_str(&format!("Proxy-Authorization: Basic {}\r\n", encoded));
+                }
+                request.push_str("\r\n");
+
+                stream.write_all(request.as_bytes()).await?;
+
+                let mut response = [0u8; 1024];
+                let n = tokio::io::AsyncReadExt::read(&mut stream, &mut response).await?;
+                let resp_str = String::from_utf8_lossy(&response[..n]);
+                if !resp_str.contains("200") && !resp_str.contains("established") {
+                    return Err(anyhow::anyhow!("HTTP proxy CONNECT failed: {}", resp_str));
+                }
+
+                Ok(Box::new(stream) as Box<dyn ProxyStream>)
+            }
+            _ => {
+                let addr = format!("{}:{}", target_host, target_port);
+                let stream = tokio::net::TcpStream::connect(&addr).await?;
+                Ok(Box::new(stream) as Box<dyn ProxyStream>)
+            }
+        }
+    };
+
+    tokio::time::timeout(std::time::Duration::from_secs(16), connect_fut)
+        .await
+        .map_err(|_| anyhow::anyhow!("connection timed out after 16 seconds"))?
 }
 
 pub fn active_proxy(session: &Session) -> Option<(String, String, Option<u16>)> {
@@ -900,7 +1044,9 @@ pub fn active_proxy(session: &Session) -> Option<(String, String, Option<u16>)>
                 session.proxy_user.clone(),
                 session.proxy_password.clone(),
             )
-        } else if config.cache.read_env_proxy && ENV_PROXY.get().and_then(|opt| opt.as_ref()).is_some() {
+        } else if config.cache.read_env_proxy
+            && ENV_PROXY.get().and_then(|opt| opt.as_ref()).is_some()
+        {
             let env_p = ENV_PROXY.get().and_then(|opt| opt.as_ref()).unwrap();
             (
                 env_p.proxy_type.clone(),
@@ -918,13 +1064,248 @@ pub fn active_proxy(session: &Session) -> Option<(String, String, Option<u16>)>
                 config.cache.global_proxy_password.clone(),
             )
         } else {
-            ("none".to_string(), String::new(), None, String::new(), String::new())
+            (
+                "none".to_string(),
+                String::new(),
+                None,
+                String::new(),
+                String::new(),
+            )
         }
     };
-    
+
     if proxy_type != "none" && !proxy_host.is_empty() && proxy_port.is_some() {
         Some((proxy_type, proxy_host, proxy_port))
     } else {
         None
     }
 }
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+struct EncryptedConfigEnvelope {
+    format_version: u32,
+    kdf: String,
+    cipher: String,
+    salt: String,
+    nonce: String,
+    payload: String,
+}
+
+static HARDWARE_UUID_CACHE: OnceLock<String> = OnceLock::new();
+
+pub fn get_hardware_uuid() -> String {
+    HARDWARE_UUID_CACHE
+        .get_or_init(|| {
+            #[cfg(target_os = "macos")]
+            {
+                if let Ok(output) = std::process::Command::new("ioreg")
+                    .args(&["-rd1", "-c", "IOPlatformExpertDevice"])
+                    .output()
+                {
+                    let stdout = String::from_utf8_lossy(&output.stdout);
+                    for line in stdout.lines() {
+                        if line.contains("IOPlatformUUID") {
+                            if let Some(uuid) = line.split('"').nth(3) {
+                                let uuid = uuid.trim().to_string();
+                                if !uuid.is_empty() {
+                                    return uuid;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
+            #[cfg(target_os = "linux")]
+            {
+                if let Ok(uuid) = std::fs::read_to_string("/sys/class/dmi/id/product_uuid") {
+                    let uuid = uuid.trim().to_string();
+                    if !uuid.is_empty() {
+                        return uuid;
+                    }
+                }
+                if let Ok(id) = std::fs::read_to_string("/etc/machine-id") {
+                    let id = id.trim().to_string();
+                    if !id.is_empty() {
+                        return id;
+                    }
+                }
+                if let Ok(id) = std::fs::read_to_string("/var/lib/dbus/machine-id") {
+                    let id = id.trim().to_string();
+                    if !id.is_empty() {
+                        return id;
+                    }
+                }
+            }
+
+            #[cfg(target_os = "windows")]
+            {
+                use winreg::RegKey;
+                use winreg::enums::HKEY_LOCAL_MACHINE;
+                let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
+                if let Ok(subkey) = hklm.open_subkey("SOFTWARE\\Microsoft\\Cryptography") {
+                    if let Ok(guid) = subkey.get_value::<String, _>("MachineGuid") {
+                        let guid = guid.trim().to_string();
+                        if !guid.is_empty() {
+                            return guid;
+                        }
+                    }
+                }
+            }
+
+            "ashell-default-hardware-uuid-fallback".to_string()
+        })
+        .clone()
+}
+
+fn encrypt_config(config: &ConfigFile, password: &str) -> Result<Vec<u8>> {
+    let mut salt = [0u8; 16];
+    let mut nonce = [0u8; 24];
+    OsRng.fill_bytes(&mut salt);
+    OsRng.fill_bytes(&mut nonce);
+
+    let mut key = [0u8; 32];
+    Argon2::default()
+        .hash_password_into(password.as_bytes(), &salt, &mut key)
+        .map_err(|err| anyhow::anyhow!("derive encryption key: {err}"))?;
+
+    let plaintext = serde_json::to_vec(config).context("serialize config")?;
+    let ciphertext = XChaCha20Poly1305::new((&key).into())
+        .encrypt(XNonce::from_slice(&nonce), plaintext.as_ref())
+        .map_err(|_| anyhow::anyhow!("encrypt config payload"))?;
+
+    serde_json::to_vec_pretty(&EncryptedConfigEnvelope {
+        format_version: 1,
+        kdf: "argon2id".to_string(),
+        cipher: "xchacha20poly1305".to_string(),
+        salt: STANDARD.encode(salt),
+        nonce: STANDARD.encode(nonce),
+        payload: STANDARD.encode(ciphertext),
+    })
+    .context("serialize encrypted config envelope")
+}
+
+fn decrypt_config(raw: &[u8], password: &str) -> Result<ConfigFile> {
+    let envelope: EncryptedConfigEnvelope =
+        serde_json::from_slice(raw).context("parse encrypted config envelope")?;
+    if envelope.format_version != 1
+        || envelope.kdf != "argon2id"
+        || envelope.cipher != "xchacha20poly1305"
+    {
+        return Err(anyhow::anyhow!("unsupported encrypted config format"));
+    }
+    let salt = STANDARD
+        .decode(envelope.salt)
+        .context("decode config salt")?;
+    let nonce = STANDARD
+        .decode(envelope.nonce)
+        .context("decode config nonce")?;
+    if nonce.len() != 24 {
+        return Err(anyhow::anyhow!("invalid config nonce"));
+    }
+    let ciphertext = STANDARD
+        .decode(envelope.payload)
+        .context("decode encrypted config payload")?;
+
+    let mut key = [0u8; 32];
+    Argon2::default()
+        .hash_password_into(password.as_bytes(), &salt, &mut key)
+        .map_err(|err| anyhow::anyhow!("derive encryption key: {err}"))?;
+
+    let plaintext = XChaCha20Poly1305::new((&key).into())
+        .decrypt(XNonce::from_slice(&nonce), ciphertext.as_ref())
+        .map_err(|_| {
+            anyhow::anyhow!("cannot decrypt config; hardware UUID mismatch or corrupted data")
+        })?;
+
+    serde_json::from_slice(&plaintext).context("parse decrypted config")
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_get_hardware_uuid() {
+        let uuid = get_hardware_uuid();
+        assert!(!uuid.is_empty());
+    }
+
+    #[test]
+    fn test_config_encryption_roundtrip() {
+        let config = ConfigFile::default();
+        let password = "test-password-123";
+        let encrypted = encrypt_config(&config, password).unwrap();
+
+        // Ensure it doesn't contain plain text fields of default config
+        let encrypted_str = String::from_utf8_lossy(&encrypted);
+        assert!(!encrypted_str.contains("Maple Mono NF CN"));
+        assert!(encrypted_str.contains("argon2id"));
+
+        let decrypted = decrypt_config(&encrypted, password).unwrap();
+        assert_eq!(decrypted.terminal_font_family, config.terminal_font_family);
+
+        // Decrypt with wrong password should fail
+        assert!(decrypt_config(&encrypted, "wrong-password").is_err());
+    }
+
+    #[test]
+    fn test_save_merged_preferences() {
+        let temp_dir = std::env::temp_dir();
+        let path = temp_dir.join(format!("ashell-test-config-{}.json", Uuid::new_v4()));
+        let mut store = ConfigStore {
+            path: path.clone(),
+            cache: ConfigFile::default(),
+        };
+
+        let session = Session {
+            id: "test-session-id".to_string(),
+            name: "Test Session".to_string(),
+            host: "1.2.3.4".to_string(),
+            port: 22,
+            user: "root".to_string(),
+            auth: AuthMethod::Password,
+            password: "pwd".to_string(),
+            private_key_path: String::new(),
+            private_key_inline: String::new(),
+            passphrase: String::new(),
+            last_used: None,
+            proxy_type: String::new(),
+            proxy_host: String::new(),
+            proxy_port: None,
+            proxy_user: String::new(),
+            proxy_password: String::new(),
+            protocol: "ssh".to_string(),
+            baud_rate: 115200,
+        };
+        store.cache.sessions.push(session.clone());
+        store.save().unwrap();
+
+        let mut local_config = ConfigFile::default();
+        local_config.ui_font_size = 18.0;
+        local_config.terminal_font_size = 20.0;
+        local_config.show_hidden_files = true;
+
+        store.save_merged_preferences(local_config).unwrap();
+
+        let loaded_bytes = fs::read(&path).unwrap();
+        let decrypted = decrypt_config(&loaded_bytes, &get_hardware_uuid()).unwrap();
+
+        assert_eq!(decrypted.ui_font_size, 18.0);
+        assert_eq!(decrypted.terminal_font_size, 20.0);
+        assert!(decrypted.show_hidden_files);
+
+        assert_eq!(decrypted.sessions.len(), 1);
+        assert_eq!(decrypted.sessions[0].name, "Test Session");
+        assert_eq!(decrypted.sessions[0].host, "1.2.3.4");
+
+        let _ = fs::remove_file(&path);
+    }
+
+    #[test]
+    fn test_key_binding_unbinding_none() {
+        let mut store = ConfigStore::in_memory();
+        store.set_key_binding("OpenSettings", "none");
+        assert_eq!(store.key_bindings().get("OpenSettings").unwrap(), "none");
+    }
+}

src/session/mod.rs

@@ -1,8 +1,10 @@
 pub mod config;
+pub mod ssh_config;
+pub mod ssh_keys;
 
 use gpui::{
-    AppContext as _, Context, Entity, KeyDownEvent, MouseButton, MouseDownEvent,
-    MouseMoveEvent, SharedString, Window, px,
+    AppContext as _, Context, Entity, KeyDownEvent, MouseButton, MouseDownEvent, MouseMoveEvent,
+    SharedString, Window, px,
 };
 use gpui_component::{Theme, WindowExt as _, input::InputState};
 use rust_i18n::t;
@@ -12,9 +14,7 @@ use self::config::{AuthMethod, Session};
 
 use crate::{
     Ashell, PaneLayout, SelectorEntry, TabGroup,
-    app::constants::{
-        DEFAULT_COLS, DEFAULT_ROWS,
-    },
+    app::constants::{DEFAULT_COLS, DEFAULT_ROWS},
     backend::{local, ssh},
     terminal::{BackendCommand, RenderSnapshot, TabKind, TerminalTab},
 };
@@ -56,6 +56,55 @@ impl Ashell {
     }
 
     pub(crate) fn connect_ssh(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        if self.session_protocol == "serial" {
+            let session_name = self.session_name_input.read(cx).value().trim().to_string();
+            let port_name = self.host_input.read(cx).value().trim().to_string();
+            let baud_rate = self
+                .baud_rate_input
+                .read(cx)
+                .value()
+                .trim()
+                .parse::<u32>()
+                .unwrap_or(115200);
+
+            if port_name.is_empty() {
+                self.status = "Serial port path is required".into();
+                cx.notify();
+                return;
+            }
+
+            let name = if session_name.is_empty() {
+                port_name.clone()
+            } else {
+                session_name
+            };
+
+            let existing_id = self.editing_session_id.clone();
+            let existing_last_used = existing_id
+                .as_deref()
+                .and_then(|id| self.config.get(id))
+                .and_then(|session| session.last_used.clone());
+
+            let mut session = Session::serial(port_name, baud_rate);
+            session.name = name;
+            if let Some(id) = existing_id {
+                session.id = id;
+            }
+            session.last_used = existing_last_used;
+
+            self.config.upsert(session.clone());
+            if let Err(err) = self.config.save() {
+                tracing::warn!("failed to save config: {err:#}");
+            }
+
+            self.open_serial_session(session, cx);
+            self.editing_session_id = None;
+            self.active_dialog = None;
+            window.close_dialog(cx);
+            cx.notify();
+            return;
+        }
+
         tracing::info!("[ui] user initiating new ssh connection from form");
         let session_name = self.session_name_input.read(cx).value().trim().to_string();
         let host = self.host_input.read(cx).value().trim().to_string();
@@ -102,13 +151,14 @@ impl Ashell {
 
         let mut session = match self.ssh_auth_method {
             AuthMethod::Password => Session::password(host, port, user, password),
-            AuthMethod::Key => {
-                if key_path.is_empty() && key_inline.trim().is_empty() {
-                    self.status = "private key path or content is required".into();
-                    cx.notify();
-                    return;
-                }
-                Session::key(host, port, user, key_path, key_inline, passphrase)
+            AuthMethod::Key => Session::key(host, port, user, key_path, key_inline, passphrase),
+            AuthMethod::Config => {
+                // Force key_inline to empty — config mode never uses inline key content.
+                // The backend will try default keys from ~/.ssh/ if no explicit key path is set.
+                let mut session =
+                    Session::key(host, port, user, key_path, String::new(), String::new());
+                session.auth = AuthMethod::Config;
+                session
             }
         };
         session.name = name;
@@ -151,6 +201,8 @@ impl Ashell {
     pub(crate) fn reset_ssh_form(&mut self, window: &mut Window, cx: &mut Context<Self>) {
         self.editing_session_id = None;
         self.ssh_auth_method = AuthMethod::Password;
+        self.ssh_config_selected = None;
+        self.session_protocol = "ssh".to_string();
         Self::set_input_value(&self.session_name_input, "", window, cx);
         Self::set_input_value(&self.host_input, "", window, cx);
         Self::set_input_value(&self.port_input, "22", window, cx);
@@ -159,6 +211,7 @@ impl Ashell {
         Self::set_input_value(&self.key_path_input, "", window, cx);
         Self::set_input_value(&self.key_inline_input, "", window, cx);
         Self::set_input_value(&self.passphrase_input, "", window, cx);
+        Self::set_input_value(&self.baud_rate_input, "115200", window, cx);
         self.ssh_proxy_type = "none".to_string();
         Self::set_input_value(&self.proxy_host_input, "", window, cx);
         Self::set_input_value(&self.proxy_port_input, "", window, cx);
@@ -174,6 +227,7 @@ impl Ashell {
     ) {
         self.editing_session_id = Some(session.id.clone());
         self.ssh_auth_method = session.auth;
+        self.session_protocol = session.protocol.clone();
         Self::set_input_value(&self.session_name_input, session.name.clone(), window, cx);
         Self::set_input_value(&self.host_input, session.host.clone(), window, cx);
         Self::set_input_value(&self.port_input, session.port.to_string(), window, cx);
@@ -197,20 +251,44 @@ impl Ashell {
             window,
             cx,
         );
+        Self::set_input_value(
+            &self.baud_rate_input,
+            session.baud_rate.to_string(),
+            window,
+            cx,
+        );
         self.ssh_proxy_type = if session.proxy_type.is_empty() {
             "none".to_string()
         } else {
             session.proxy_type.clone()
         };
-        Self::set_input_value(&self.proxy_host_input, session.proxy_host.clone(), window, cx);
         Self::set_input_value(
+            &self.proxy_host_input,
+            session.proxy_host.clone(),
+            window,
+            cx,
+        );
+        Self::set_input_value(
             &self.proxy_port_input,
-            session.proxy_port.map(|p| p.to_string()).unwrap_or_default(),
+            session
+                .proxy_port
+                .map(|p| p.to_string())
+                .unwrap_or_default(),
+            window,
+            cx,
+        );
+        Self::set_input_value(
+            &self.proxy_user_input,
+            session.proxy_user.clone(),
+            window,
+            cx,
+        );
+        Self::set_input_value(
+            &self.proxy_password_input,
+            session.proxy_password.clone(),
             window,
             cx,
         );
-        Self::set_input_value(&self.proxy_user_input, session.proxy_user.clone(), window, cx);
-        Self::set_input_value(&self.proxy_password_input, session.proxy_password.clone(), window, cx);
     }
 
     pub(crate) fn pick_ssh_key_path(&mut self, window: &mut Window, cx: &mut Context<Self>) {
@@ -293,9 +371,7 @@ impl Ashell {
     pub(crate) fn change_terminal_font_size(&mut self, delta: f32, cx: &mut Context<Self>) {
         self.terminal_font_size = (self.terminal_font_size + delta).clamp(10.0, 24.0);
         self.config.set_terminal_font_size(self.terminal_font_size);
-        if let Err(err) = self.config.save() {
-            tracing::warn!("failed to save terminal font size: {err:#}");
-        }
+        self.save_preferences_background();
         self.status = format!("terminal font size: {:.0}px", self.terminal_font_size).into();
         cx.notify();
     }
@@ -303,9 +379,7 @@ impl Ashell {
     pub(crate) fn change_ui_font_size(&mut self, delta: f32, cx: &mut Context<Self>) {
         self.ui_font_size = (self.ui_font_size + delta).clamp(8.0, 24.0);
         self.config.set_ui_font_size(self.ui_font_size);
-        if let Err(err) = self.config.save() {
-            tracing::warn!("failed to save UI font size: {err:#}");
-        }
+        self.save_preferences_background();
         Theme::global_mut(cx).font_size = px(self.ui_font_size);
         self.status = format!("UI font size: {:.0}px", self.ui_font_size).into();
         cx.notify();
@@ -319,9 +393,7 @@ impl Ashell {
     ) {
         self.ui_font_family = family.into();
         self.config.set_ui_font_family(family);
-        if let Err(err) = self.config.save() {
-            tracing::warn!("failed to save UI font family: {err:#}");
-        }
+        self.save_preferences_background();
         crate::app::theme::set_theme_font_names(Theme::global_mut(cx), &self.ui_font_family);
         cx.notify();
         window.refresh();
@@ -330,9 +402,7 @@ impl Ashell {
     pub(crate) fn change_terminal_font_family(&mut self, family: &str, cx: &mut Context<Self>) {
         self.terminal_font_family = family.into();
         self.config.set_terminal_font_family(family);
-        if let Err(err) = self.config.save() {
-            tracing::warn!("failed to save terminal font family: {err:#}");
-        }
+        self.save_preferences_background();
         cx.notify();
     }
 
@@ -343,15 +413,13 @@ impl Ashell {
     ) {
         self.cursor_style = style;
         self.config.set_cursor_style(style);
-        if let Err(err) = self.config.save() {
-            tracing::warn!("failed to save cursor style: {err:#}");
-        }
+        self.save_preferences_background();
         cx.notify();
     }
 
     pub(crate) fn reset_layout(&mut self, _window: &mut Window, cx: &mut Context<Self>) {
         self.config.set_layout_state(None, None, None);
-        let _ = self.config.save();
+        self.save_preferences_background();
 
         self.is_layout_reset = true;
         self.workspace_panels = cx.new(|_| crate::app::resizable::ResizableState::default());
@@ -362,9 +430,62 @@ impl Ashell {
 
     pub(crate) fn set_ssh_auth_method(&mut self, method: AuthMethod, cx: &mut Context<Self>) {
         self.ssh_auth_method = method;
+        if method == AuthMethod::Config {
+            self.refresh_ssh_config();
+            self.ssh_config_selected = None;
+        }
         cx.notify();
     }
 
+    pub(crate) fn set_session_protocol(&mut self, protocol: String, cx: &mut Context<Self>) {
+        self.session_protocol = protocol;
+        cx.notify();
+    }
+
+    pub(crate) fn refresh_ssh_config(&mut self) {
+        self.ssh_config_entries =
+            crate::session::ssh_config::parse_ssh_config().unwrap_or_default();
+    }
+
+    pub(crate) fn select_ssh_config_entry(
+        &mut self,
+        index: usize,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        self.ssh_config_selected = Some(index);
+        if let Some(entry) = self.ssh_config_entries.get(index) {
+            Self::set_input_value(
+                &self.session_name_input,
+                entry.host_alias.clone(),
+                window,
+                cx,
+            );
+            Self::set_input_value(&self.host_input, entry.hostname.clone(), window, cx);
+            Self::set_input_value(&self.port_input, entry.port.to_string(), window, cx);
+            // If no user specified in config, use current system user
+            let user = if entry.user.is_empty() {
+                std::env::var("USER")
+                    .or_else(|_| std::env::var("USERNAME"))
+                    .unwrap_or_else(|_| "root".to_string())
+            } else {
+                entry.user.clone()
+            };
+            Self::set_input_value(&self.user_input, user, window, cx);
+            Self::set_input_value(
+                &self.key_path_input,
+                entry.identity_files.first().cloned().unwrap_or_default(),
+                window,
+                cx,
+            );
+            Self::set_input_value(&self.password_input, String::new(), window, cx);
+            Self::set_input_value(&self.key_inline_input, String::new(), window, cx);
+            Self::set_input_value(&self.passphrase_input, String::new(), window, cx);
+            // Auto-connect on selection
+            self.connect_ssh(window, cx);
+        }
+    }
+
     pub(crate) fn set_ssh_proxy_type(&mut self, proxy_type: String, cx: &mut Context<Self>) {
         self.ssh_proxy_type = proxy_type;
         cx.notify();
@@ -380,7 +501,11 @@ impl Ashell {
             cx.notify();
             return;
         };
-        self.open_ssh_session(session, cx);
+        if session.protocol == "serial" {
+            self.open_serial_session(session, cx);
+        } else {
+            self.open_ssh_session(session, cx);
+        }
     }
 
     pub(crate) fn selector_entries(&self) -> Vec<SelectorEntry> {
@@ -545,6 +670,57 @@ impl Ashell {
         cx.notify();
     }
 
+    pub(crate) fn open_serial_session(&mut self, session: Session, cx: &mut Context<Self>) {
+        tracing::info!(
+            "[session] opening serial tab for session '{}' ({})",
+            session.name,
+            session.host
+        );
+        let id = Uuid::new_v4().to_string();
+        let backend = crate::backend::serial::spawn_serial_client(
+            self.runtime.handle(),
+            id.clone(),
+            session.clone(),
+            self.events_tx.clone(),
+        );
+        self.tabs.push(TerminalTab::new_serial(
+            id.clone(),
+            &session,
+            crate::terminal::BackendTx::Serial(backend),
+            self.events_tx.clone(),
+        ));
+        self.active_tab = Some(id.clone());
+        self.connection_progress = Some(crate::app::ConnectionProgress {
+            tab_id: id.clone(),
+            title: rust_i18n::t!("connecting").into(),
+            lines: vec![rust_i18n::t!("starting_connection").into()],
+            failed: false,
+        });
+        self.pane_root = PaneLayout::Single(id.clone());
+        self.focused_pane_path = vec![];
+        let group_id = Uuid::new_v4().to_string();
+        self.tab_groups.push(TabGroup {
+            id: group_id.clone(),
+            title: session.name.clone(),
+            pane_root: PaneLayout::Single(id.clone()),
+            sftp: None,
+        });
+        self.active_group = Some(group_id.clone());
+        self.tabs_scroll_handle.scroll_to_item(self.tabs.len() - 1);
+        if let Some(session_id) = self.active_session_id() {
+            if let Some(index) = self
+                .config
+                .sessions()
+                .iter()
+                .position(|s| s.id == session_id)
+            {
+                self.saved_scroll_handle.scroll_to_item(index);
+            }
+        }
+        self.status = "serial tab opened".into();
+        cx.notify();
+    }
+
     pub(crate) fn remove_saved_session(&mut self, session_id: String, cx: &mut Context<Self>) {
         self.config.remove(&session_id);
         if let Err(err) = self.config.save() {
@@ -578,20 +754,30 @@ impl Ashell {
         self.tabs[ix].send_backend(BackendCommand::Close);
 
         if let Some(session) = session {
-            // SSH tab: spawn new SSH connection
-            let backend = ssh::spawn_ssh_terminal(
-                self.runtime.handle(),
-                tab_id.to_string(),
-                session.clone(),
-                cols,
-                rows,
-                self.events_tx.clone(),
-            );
-
-            // Swap the backend — the Term's internal listener shares the
-            // same Arc<Mutex<BackendTx>>, so user input is automatically
-            // routed to the new backend. Terminal history is preserved.
-            self.tabs[ix].set_backend(backend);
+            let tab_kind = self.tabs[ix].kind;
+            match tab_kind {
+                crate::terminal::TabKind::Serial => {
+                    let backend = crate::backend::serial::spawn_serial_client(
+                        self.runtime.handle(),
+                        tab_id.to_string(),
+                        session.clone(),
+                        self.events_tx.clone(),
+                    );
+                    self.tabs[ix].set_backend(crate::terminal::BackendTx::Serial(backend));
+                }
+                crate::terminal::TabKind::Ssh => {
+                    let backend = ssh::spawn_ssh_terminal(
+                        self.runtime.handle(),
+                        tab_id.to_string(),
+                        session.clone(),
+                        cols,
+                        rows,
+                        self.events_tx.clone(),
+                    );
+                    self.tabs[ix].set_backend(backend);
+                }
+                _ => {}
+            }
             self.tabs[ix].connected = false;
             self.tabs[ix].status = "connecting".into();
             self.tabs[ix].disconnected_reason = None;
@@ -612,20 +798,22 @@ impl Ashell {
                     .and_then(|t| t.session.clone());
 
                 if let Some(session) = group_session {
-                    if let Some(old_handle) = self.sftp_handles.remove(&group_id) {
-                        old_handle.close();
-                    }
-                    let sftp_handle = crate::sftp::spawn_sftp(
-                        self.runtime.handle(),
-                        group_id.clone(),
-                        session,
-                        self.events_tx.clone(),
-                    );
-                    self.sftp_handles.insert(group_id.clone(), sftp_handle);
+                    if session.protocol != "serial" {
+                        if let Some(old_handle) = self.sftp_handles.remove(&group_id) {
+                            old_handle.close();
+                        }
+                        let sftp_handle = crate::sftp::spawn_sftp(
+                            self.runtime.handle(),
+                            group_id.clone(),
+                            session,
+                            self.events_tx.clone(),
+                        );
+                        self.sftp_handles.insert(group_id.clone(), sftp_handle);
 
-                    if let Some(group) = self.tab_groups.iter_mut().find(|g| g.id == group_id) {
-                        if let Some(sftp) = group.sftp.as_mut() {
-                            sftp.status = rust_i18n::t!("sftp_connecting").to_string();
+                        if let Some(group) = self.tab_groups.iter_mut().find(|g| g.id == group_id) {
+                            if let Some(sftp) = group.sftp.as_mut() {
+                                sftp.status = rust_i18n::t!("sftp_connecting").to_string();
+                            }
                         }
                     }
                 }
@@ -715,6 +903,13 @@ impl Ashell {
     }
 
     pub(crate) fn handle_tab_close(&mut self, id: String) {
+        if self
+            .connection_progress
+            .as_ref()
+            .map_or(false, |p| p.tab_id == id)
+        {
+            self.connection_progress = None;
+        }
         let group_ix = self
             .tab_groups
             .iter()
@@ -901,7 +1096,12 @@ impl Ashell {
             if event.modifiers.platform {
                 if let Some((row, col, _side)) = self.terminal_grid_point_and_side(event.position) {
                     if let Some(snapshot) = self.active_snapshot() {
-                        if let Some((url, _)) = crate::terminal::highlight::find_url_at_cell(&snapshot.cells, snapshot.rows, row, col) {
+                        if let Some((url, _)) = crate::terminal::highlight::find_url_at_cell(
+                            &snapshot.cells,
+                            snapshot.rows,
+                            row,
+                            col,
+                        ) {
                             let _ = open::that(&url);
                             return;
                         }
@@ -913,7 +1113,8 @@ impl Ashell {
                     if !text.is_empty() {
                         cx.write_to_clipboard(gpui::ClipboardItem::new_string(text));
                         if let Some(active_id) = &self.active_tab {
-                            if let Some(tab) = self.tabs.iter_mut().find(|tab| &tab.id == active_id) {
+                            if let Some(tab) = self.tabs.iter_mut().find(|tab| &tab.id == active_id)
+                            {
                                 tab.clear_selection();
                             }
                         }
@@ -929,7 +1130,7 @@ impl Ashell {
         self.active_tab
             .as_ref()
             .and_then(|id| self.tabs.iter().find(|t| &t.id == id))
-            .map(TerminalTab::render_snapshot)
+            .map(|t| t.render_snapshot(self.config.keyword_highlight()))
     }
 
     pub(crate) fn active_kind(&self) -> Option<TabKind> {
@@ -965,13 +1166,13 @@ impl Ashell {
     }
 
     pub(crate) fn session_detail(&self, session: &Session) -> String {
-        format!("{}@{}:{}", session.user, session.host, session.port)
+        if session.protocol == "serial" {
+            format!("Serial: {}@{}", session.host, session.baud_rate)
+        } else {
+            format!("{}@{}:{}", session.user, session.host, session.port)
+        }
     }
 
-
-
-
-
     pub(crate) fn split_current_pane(&mut self, direction: &str, cx: &mut Context<Self>) {
         tracing::info!(
             "[split] direction={} pane_root={:?} focused_path={:?} active_tab={:?} tabs={}",
@@ -1035,6 +1236,25 @@ impl Ashell {
                 self.sftp_handles.insert(new_id.clone(), sftp_handle);
                 TerminalTab::new_ssh(new_id.clone(), &session, backend, self.events_tx.clone())
             }
+            TabKind::Serial => {
+                let Some(session) = current_tab.session.clone() else {
+                    self.status = "cannot split: no session info".into();
+                    cx.notify();
+                    return;
+                };
+                let backend = crate::backend::serial::spawn_serial_client(
+                    self.runtime.handle(),
+                    new_id.clone(),
+                    session.clone(),
+                    self.events_tx.clone(),
+                );
+                TerminalTab::new_serial(
+                    new_id.clone(),
+                    &session,
+                    crate::terminal::BackendTx::Serial(backend),
+                    self.events_tx.clone(),
+                )
+            }
         };
         tab.resize(DEFAULT_COLS, DEFAULT_ROWS);
         // Do NOT add to tab_groups — pane stays within the existing group
@@ -1086,7 +1306,7 @@ impl Ashell {
         cx.notify();
     }
 
-    pub(crate) fn focus_adjacent_pane(&mut self, direction: &str) {
+    pub(crate) fn focus_adjacent_pane(&mut self, direction: &str, cx: &mut Context<Self>) {
         if self.focused_pane_path.is_empty() {
             return;
         }
@@ -1105,6 +1325,7 @@ impl Ashell {
                     self.search_target_tab = None;
                 }
             }
+            cx.notify();
         }
     }
 

src/session/ssh_config.rs

@@ -0,0 +1,179 @@
+use std::fs;
+use std::path::PathBuf;
+
+use anyhow::{Context, Result};
+use directories::BaseDirs;
+
+/// A parsed entry from ~/.ssh/config
+#[derive(Debug, Clone)]
+pub struct SshConfigEntry {
+    /// The Host pattern (alias) from the config, e.g. "myserver"
+    pub host_alias: String,
+    /// The actual hostname (HostName), defaults to the host alias if not specified
+    pub hostname: String,
+    /// The user, defaults to empty (will use current OS user)
+    pub user: String,
+    /// The port, defaults to 22
+    pub port: u16,
+    /// Identity files specified for this host
+    pub identity_files: Vec<String>,
+    /// Whether this is a wildcard/pattern host (Host * or Host *)
+    pub is_wildcard: bool,
+}
+
+/// Parse ~/.ssh/config and return a list of concrete host entries.
+/// Wildcard patterns (Host *) are excluded.
+pub fn parse_ssh_config() -> Result<Vec<SshConfigEntry>> {
+    let config_path = ssh_config_path()?;
+    if !config_path.is_file() {
+        return Ok(Vec::new());
+    }
+
+    let content = fs::read_to_string(&config_path)
+        .with_context(|| format!("failed to read {}", config_path.display()))?;
+
+    parse_ssh_config_content(&content)
+}
+
+fn ssh_config_path() -> Result<PathBuf> {
+    BaseDirs::new()
+        .map(|dirs| dirs.home_dir().join(".ssh/config"))
+        .context("failed to determine home directory")
+}
+
+/// Parse the content of an ssh config file into entries.
+pub fn parse_ssh_config_content(content: &str) -> Result<Vec<SshConfigEntry>> {
+    let mut entries: Vec<SshConfigEntry> = Vec::new();
+    let mut current_host: Option<SshConfigEntry> = None;
+
+    for line in content.lines() {
+        let line = line.trim();
+
+        // Skip empty lines and comments
+        if line.is_empty() || line.starts_with('#') {
+            continue;
+        }
+
+        // Split into keyword and value
+        // OpenSSH supports both "keyword value" and "keyword=value" formats
+        let (keyword, value) = if let Some(pos) = line.find('=') {
+            (&line[..pos], line[pos + 1..].trim())
+        } else if let Some(pos) = line.find(' ') {
+            (&line[..pos], line[pos..].trim())
+        } else {
+            continue;
+        };
+
+        let keyword_lower = keyword.trim().to_lowercase();
+        let value = value.trim();
+
+        match keyword_lower.as_str() {
+            "host" => {
+                // Save previous entry if it exists and is not a wildcard
+                if let Some(entry) = current_host.take() {
+                    if !entry.is_wildcard {
+                        entries.push(entry);
+                    }
+                }
+
+                // Host line may contain multiple patterns (Host a b c)
+                // Take the first non-wildcard pattern as the display alias
+                let patterns: Vec<&str> = value.split_whitespace().collect();
+                if patterns.is_empty() {
+                    continue;
+                }
+                let host_alias = patterns
+                    .iter()
+                    .find(|p| !p.contains('*') && !p.contains('?'))
+                    .map(|p| p.to_string())
+                    .unwrap_or_else(|| patterns[0].to_string());
+
+                let is_wildcard = value.contains('*') || value.contains('?');
+
+                current_host = Some(SshConfigEntry {
+                    host_alias: host_alias.clone(),
+                    hostname: host_alias,
+                    user: String::new(),
+                    port: 22,
+                    identity_files: Vec::new(),
+                    is_wildcard,
+                });
+            }
+            "hostname" => {
+                if let Some(entry) = current_host.as_mut() {
+                    entry.hostname = value.to_string();
+                }
+            }
+            "user" => {
+                if let Some(entry) = current_host.as_mut() {
+                    entry.user = value.to_string();
+                }
+            }
+            "port" => {
+                if let Some(entry) = current_host.as_mut() {
+                    entry.port = value.parse::<u16>().unwrap_or(22);
+                }
+            }
+            "identityfile" => {
+                if let Some(entry) = current_host.as_mut() {
+                    entry.identity_files.push(value.to_string());
+                }
+            }
+            // Skip Match blocks and Include directives — not supported yet
+            "match" | "include" => {
+                // If we encounter a Match block, flush the current Host entry
+                // since Match blocks apply to all subsequent hosts until the next Match/Host
+                if let Some(entry) = current_host.take() {
+                    if !entry.is_wildcard {
+                        entries.push(entry);
+                    }
+                }
+                // Don't create a new entry for Match/Include
+            }
+            _ => {}
+        }
+    }
+
+    // Save the last entry if it's not a wildcard
+    if let Some(entry) = current_host.take() {
+        if !entry.is_wildcard {
+            entries.push(entry);
+        }
+    }
+
+    Ok(entries)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse_ssh_config_content() {
+        let content = r#"
+            Host myhost
+                HostName 1.2.3.4
+                User git
+                Port 2222
+                IdentityFile ~/.ssh/id_rsa
+
+            Host
+            Host = 
+
+            Host anotherhost
+                HostName 5.6.7.8
+        "#;
+
+        let entries = parse_ssh_config_content(content).unwrap();
+        assert_eq!(entries.len(), 2);
+
+        assert_eq!(entries[0].host_alias, "myhost");
+        assert_eq!(entries[0].hostname, "1.2.3.4");
+        assert_eq!(entries[0].user, "git");
+        assert_eq!(entries[0].port, 2222);
+        assert_eq!(entries[0].identity_files, vec!["~/.ssh/id_rsa".to_string()]);
+
+        assert_eq!(entries[1].host_alias, "anotherhost");
+        assert_eq!(entries[1].hostname, "5.6.7.8");
+    }
+}

src/session/ssh_keys.rs

@@ -0,0 +1,96 @@
+use std::sync::Arc;
+
+use anyhow::{Result, anyhow};
+use directories::BaseDirs;
+use russh::{
+    client::{self, Handler},
+    keys::{HashAlg, PrivateKey, key::PrivateKeyWithHashAlg, load_secret_key},
+};
+
+use crate::session::config::Session;
+
+pub const DEFAULT_KEY_NAMES: &[&str] = &["id_ed25519", "id_rsa", "id_ecdsa", "id_dsa"];
+
+pub fn session_has_explicit_key(session: &Session) -> bool {
+    !session.private_key_path.trim().is_empty()
+        || !normalize_inline_private_key(&session.private_key_inline).is_empty()
+}
+
+pub fn normalize_inline_private_key(value: &str) -> String {
+    let mut normalized = value
+        .trim()
+        .replace("\\r\\n", "\n")
+        .replace("\\n", "\n")
+        .replace("\r\n", "\n");
+    if normalized.is_empty() {
+        return String::new();
+    }
+    if !normalized.ends_with('\n') {
+        normalized.push('\n');
+    }
+    normalized
+}
+
+pub fn private_keys_with_algs(keypair: PrivateKey) -> Result<Vec<PrivateKeyWithHashAlg>> {
+    let mut algs = Vec::new();
+    let key_arc = Arc::new(keypair);
+
+    if key_arc.algorithm().is_rsa() {
+        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), Some(HashAlg::Sha512)) {
+            algs.push(k);
+        }
+        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), Some(HashAlg::Sha256)) {
+            algs.push(k);
+        }
+        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), None) {
+            algs.push(k);
+        }
+    } else if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), None) {
+        algs.push(k);
+    }
+
+    if algs.is_empty() {
+        return Err(anyhow!(
+            "Failed to construct PrivateKeyWithHashAlg for any supported hash algorithm"
+        ));
+    }
+
+    Ok(algs)
+}
+
+pub async fn authenticate_with_default_keys<H>(
+    handle: &mut client::Handle<H>,
+    user: &str,
+    passphrase: Option<&str>,
+) -> Result<bool>
+where
+    H: Handler + Send + Sync,
+    H::Error: Into<anyhow::Error>,
+{
+    let Some(ssh_dir) = BaseDirs::new().map(|d| d.home_dir().join(".ssh")) else {
+        return Ok(false);
+    };
+
+    for key_name in DEFAULT_KEY_NAMES {
+        let key_path = ssh_dir.join(key_name);
+        if !key_path.exists() {
+            continue;
+        }
+        tracing::debug!("[ssh] trying default key {}", key_path.display());
+        match load_secret_key(&key_path, passphrase) {
+            Ok(keypair) => {
+                if let Ok(keys) = private_keys_with_algs(keypair) {
+                    for key in keys {
+                        match handle.authenticate_publickey(user, key).await {
+                            Ok(true) => return Ok(true),
+                            Ok(false) | Err(_) => continue,
+                        }
+                    }
+                }
+            }
+            Err(_) => continue,
+        }
+    }
+
+    Ok(false)
+}

src/sftp/mod.rs

@@ -14,7 +14,7 @@ use flate2::read::GzDecoder;
 use russh::{
     Disconnect,
     client::{self, Handler},
-    keys::{HashAlg, PrivateKey, decode_secret_key, key::PrivateKeyWithHashAlg, load_secret_key},
+    keys::{PrivateKey, decode_secret_key, load_secret_key},
 };
 use russh_sftp::client::SftpSession;
 use tokio::{
@@ -29,7 +29,13 @@ use zip::read::ZipArchive;
 use rust_i18n::t;
 
 use crate::{
-    session::config::{AuthMethod, Session},
+    session::{
+        config::{AuthMethod, Session},
+        ssh_keys::{
+            authenticate_with_default_keys, normalize_inline_private_key, private_keys_with_algs,
+            session_has_explicit_key,
+        },
+    },
     terminal::BackendEvent,
 };
 
@@ -827,9 +833,9 @@ async fn connect_and_authenticate(
     session: &Session,
 ) -> Result<Arc<russh::client::Handle<SftpClientHandler>>> {
     let config = Arc::new(client::Config {
-        inactivity_timeout: Some(std::time::Duration::from_secs(600)),
-        keepalive_interval: Some(std::time::Duration::from_secs(3)),
-        keepalive_max: 2,
+        inactivity_timeout: None,
+        keepalive_interval: Some(std::time::Duration::from_secs(5)),
+        keepalive_max: 3,
         ..Default::default()
     });
     let addr = format!("{}:{}", session.host, session.port);
@@ -844,37 +850,107 @@ async fn connect_and_authenticate(
             .await
             .context("password authentication failed")?,
         AuthMethod::Key => {
-            let keypair = load_session_private_key(session)?;
-            let keys = private_keys_with_algs(keypair).context("invalid private key")?;
-            let mut success = false;
-            for key in keys {
-                match handle.authenticate_publickey(&session.user, key).await {
-                    Ok(true) => {
-                        success = true;
-                        break;
-                    }
-                    Ok(false) => {
-                        tracing::debug!(
-                            "[sftp] public key auth failed with algorithm, trying next"
-                        );
-                        continue;
-                    }
-                    Err(e) => {
-                        tracing::debug!("[sftp] public key auth error: {:?}, trying next", e);
-                        continue;
+            let has_explicit_key = session_has_explicit_key(session);
+            let success = if has_explicit_key {
+                let keypair = load_session_private_key(session)?;
+                let keys = private_keys_with_algs(keypair).context("invalid private key")?;
+                let mut success = false;
+                for key in keys {
+                    match handle.authenticate_publickey(&session.user, key).await {
+                        Ok(true) => {
+                            success = true;
+                            break;
+                        }
+                        Ok(false) => {
+                            tracing::debug!(
+                                "[sftp] public key auth failed with algorithm, trying next"
+                            );
+                            continue;
+                        }
+                        Err(e) => {
+                            tracing::debug!("[sftp] public key auth error: {:?}, trying next", e);
+                            continue;
+                        }
                     }
                 }
-            }
-            if !success {
-                return Err(anyhow!(
-                    "public key authentication failed for {}@{}:{}",
-                    session.user,
-                    session.host,
-                    session.port
-                ));
-            }
+                if !success {
+                    return Err(anyhow!(
+                        "public key authentication failed for {}@{}:{}",
+                        session.user,
+                        session.host,
+                        session.port
+                    ));
+                }
+                success
+            } else {
+                let passphrase = session.passphrase.trim();
+                let passphrase = (!passphrase.is_empty()).then_some(passphrase);
+                let success =
+                    authenticate_with_default_keys(&mut handle, &session.user, passphrase).await?;
+                if !success {
+                    return Err(anyhow!(
+                        "public key authentication failed for {}@{}:{} - no valid default key found in ~/.ssh/",
+                        session.user,
+                        session.host,
+                        session.port
+                    ));
+                }
+                success
+            };
             success
         }
+        AuthMethod::Config => {
+            // For Config auth, try the identity file from config entry, or default keys
+            // Note: for Config auth, we never use inline key content
+            let has_explicit_key = !session.private_key_path.trim().is_empty();
+
+            if has_explicit_key {
+                let keypair = load_session_private_key(session)?;
+                let keys = private_keys_with_algs(keypair).context("invalid private key")?;
+                let mut success = false;
+                for key in keys {
+                    match handle.authenticate_publickey(&session.user, key).await {
+                        Ok(true) => {
+                            success = true;
+                            break;
+                        }
+                        Ok(false) => {
+                            tracing::debug!(
+                                "[sftp] public key auth failed with algorithm, trying next"
+                            );
+                            continue;
+                        }
+                        Err(e) => {
+                            tracing::debug!("[sftp] public key auth error: {:?}, trying next", e);
+                            continue;
+                        }
+                    }
+                }
+                if !success {
+                    return Err(anyhow!(
+                        "ssh-config key authentication failed for {}@{}:{}",
+                        session.user,
+                        session.host,
+                        session.port
+                    ));
+                }
+                success
+            } else {
+                let passphrase = session.passphrase.trim();
+                let passphrase = (!passphrase.is_empty()).then_some(passphrase);
+                let success =
+                    authenticate_with_default_keys(&mut handle, &session.user, passphrase).await?;
+                if !success {
+                    return Err(anyhow!(
+                        "ssh-config authentication failed for {}@{}:{} - no valid default key found",
+                        session.user,
+                        session.host,
+                        session.port
+                    ));
+                }
+                success
+            }
+        }
     };
 
     if !authed {
@@ -886,6 +962,7 @@ async fn connect_and_authenticate(
             match session.auth {
                 AuthMethod::Password => "password",
                 AuthMethod::Key => "public key",
+                AuthMethod::Config => "ssh-config",
             },
             session.user,
             session.host,
@@ -927,47 +1004,6 @@ fn load_session_private_key(session: &Session) -> Result<PrivateKey> {
     Err(anyhow!(errors.join("; ")))
 }
 
-fn private_keys_with_algs(keypair: PrivateKey) -> Result<Vec<PrivateKeyWithHashAlg>> {
-    let mut algs = Vec::new();
-    let key_arc = Arc::new(keypair);
-
-    if key_arc.algorithm().is_rsa() {
-        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), Some(HashAlg::Sha512)) {
-            algs.push(k);
-        }
-        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), Some(HashAlg::Sha256)) {
-            algs.push(k);
-        }
-        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), None) {
-            algs.push(k);
-        }
-    } else {
-        if let Ok(k) = PrivateKeyWithHashAlg::new(key_arc.clone(), None) {
-            algs.push(k);
-        }
-    }
-
-    if algs.is_empty() {
-        return Err(anyhow!(
-            "Failed to construct PrivateKeyWithHashAlg for any supported hash algorithm"
-        ));
-    }
-
-    Ok(algs)
-}
-
-fn normalize_inline_private_key(value: &str) -> String {
-    let mut normalized = value
-        .trim()
-        .replace("\\r\\n", "\n")
-        .replace("\\n", "\n")
-        .replace("\r\n", "\n");
-    if !normalized.ends_with('\n') {
-        normalized.push('\n');
-    }
-    normalized
-}
-
 fn expand_key_path(value: &str) -> Option<PathBuf> {
     if value.is_empty() {
         return None;

src/terminal/element.rs

@@ -375,7 +375,12 @@ impl TerminalElement {
     fn layout_grid(
         &self,
         cx: &App,
-    ) -> (Vec<LayoutRect>, Vec<BatchedTextRun>, Vec<LayoutCustomBlock>, Vec<LayoutUnderline>) {
+    ) -> (
+        Vec<LayoutRect>,
+        Vec<BatchedTextRun>,
+        Vec<LayoutCustomBlock>,
+        Vec<LayoutUnderline>,
+    ) {
         let view_read = self.view.read(cx);
         let hovered_url = view_read.hovered_url.clone();
 
@@ -439,12 +444,18 @@ impl TerminalElement {
             // Apply hover underline if mouse is hovering over this URL
             if let Some(hu) = &hovered_url {
                 if hu.tab_id == self.tab_id
-                    && hu.cells.contains(&(render_cell.row as usize, render_cell.col as usize))
+                    && hu
+                        .cells
+                        .contains(&(render_cell.row as usize, render_cell.col as usize))
                 {
                     underlines.push(LayoutUnderline {
                         row: render_cell.row,
                         col: render_cell.col,
-                        cells: if cell.flags.contains(Flags::WIDE_CHAR) { 2 } else { 1 },
+                        cells: if cell.flags.contains(Flags::WIDE_CHAR) {
+                            2
+                        } else {
+                            1
+                        },
                         color: style.color,
                     });
                 }
@@ -515,7 +526,9 @@ impl TerminalElement {
         let cursor_style = self.view.read(cx).cursor_style;
         let show_cursor = match cursor_style {
             CursorStyle::Blink | CursorStyle::BeamBlink => {
-                if let Ok(duration) = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH) {
+                if let Ok(duration) =
+                    std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH)
+                {
                     (duration.as_millis() / 600) % 2 == 0
                 } else {
                     true
@@ -595,7 +608,7 @@ impl Element for TerminalElement {
         let tab_id = self.tab_id.clone();
         let _ = view.update(cx, |this, cx| {
             let old_bounds = this.terminal_bounds.insert(tab_id.clone(), bounds);
-            
+
             // Sync PTY size unconditionally on every prepaint layout pass to ensure
             // absolute synchronization with GPUI layout regardless of intermediate events.
             let line_height = this.terminal_line_height();
@@ -604,11 +617,11 @@ impl Element for TerminalElement {
             let h = bounds.size.height.as_f32();
             let cols = (w / cell_width).floor().max(1.0) as u16;
             let rows = (h / line_height).floor().max(1.0) as u16;
-            
+
             if let Some(tab) = this.tabs.iter_mut().find(|t| t.id == tab_id) {
                 tab.resize(cols, rows);
             }
-            
+
             if old_bounds != Some(bounds) {
                 cx.notify();
             }
@@ -640,9 +653,14 @@ impl Element for TerminalElement {
     ) {
         // Compute a vertical offset to center the text grid vertically,
         // distributing the leftover pixel remainder evenly to the top and bottom.
-        let grid_height = prepaint.metrics.line_height * (prepaint.bounds.size.height.as_f32() / prepaint.metrics.line_height.as_f32()).floor();
+        let grid_height = prepaint.metrics.line_height
+            * (prepaint.bounds.size.height.as_f32() / prepaint.metrics.line_height.as_f32())
+                .floor();
         let y_offset = ((prepaint.bounds.size.height - grid_height) / 2.0).max(px(0.0));
-        let draw_origin = point(prepaint.bounds.origin.x, prepaint.bounds.origin.y + y_offset);
+        let draw_origin = point(
+            prepaint.bounds.origin.x,
+            prepaint.bounds.origin.y + y_offset,
+        );
 
         for rect in &prepaint.rects {
             rect.paint(draw_origin, prepaint.metrics, window);
@@ -657,10 +675,10 @@ impl Element for TerminalElement {
         }
 
         for block in &prepaint.custom_blocks {
-            let x = draw_origin.x.as_f32()
-                + block.col as f32 * prepaint.metrics.cell_width.as_f32();
-            let y = draw_origin.y.as_f32()
-                + block.row as f32 * prepaint.metrics.line_height.as_f32();
+            let x =
+                draw_origin.x.as_f32() + block.col as f32 * prepaint.metrics.cell_width.as_f32();
+            let y =
+                draw_origin.y.as_f32() + block.row as f32 * prepaint.metrics.line_height.as_f32();
             paint_custom_block(
                 window,
                 block.c,
@@ -801,10 +819,7 @@ fn merge_underlines(mut underlines: Vec<LayoutUnderline>) -> Vec<LayoutUnderline
 
     for u in underlines {
         if let Some(last) = merged.last_mut() {
-            if last.row == u.row
-                && last.color == u.color
-                && last.col + last.cells as i32 == u.col
-            {
+            if last.row == u.row && last.color == u.color && last.col + last.cells as i32 == u.col {
                 last.cells += u.cells;
                 continue;
             }

src/terminal/highlight.rs

@@ -1,6 +1,6 @@
-use std::collections::HashMap;
-use gpui::Hsla;
 use crate::terminal::RenderCell;
+use gpui::Hsla;
+use std::collections::HashMap;
 
 trait HslaExt {
     fn into_rgba_like(self, r: u8, g: u8, b: u8) -> Self;
@@ -15,10 +15,19 @@ impl HslaExt for Hsla {
         let min = rf.min(gf).min(bf);
         let l = (max + min) / 2.0;
         if max == min {
-            return Hsla { h: 0.0, s: 0.0, l, a: 1.0 };
+            return Hsla {
+                h: 0.0,
+                s: 0.0,
+                l,
+                a: 1.0,
+            };
         }
         let d = max - min;
-        let s = if l > 0.5 { d / (2.0 - max - min) } else { d / (max + min) };
+        let s = if l > 0.5 {
+            d / (2.0 - max - min)
+        } else {
+            d / (max + min)
+        };
         let h = if max == rf {
             ((gf - bf) / d + if gf < bf { 6.0 } else { 0.0 }) / 6.0
         } else if max == gf {
@@ -33,58 +42,58 @@ impl HslaExt for Hsla {
 #[derive(Debug, Clone)]
 struct HighlightColors {
     // Log levels
-    error: Hsla,       // ERROR, ERR
-    critical: Hsla,    // PANIC, FATAL, EMERGENCY, CRITICAL
-    warning: Hsla,     // WARNING, WARN
-    info: Hsla,        // INFO, NOTICE
-    debug: Hsla,       // DEBUG, TRACE, DBG
-    alert: Hsla,       // ALERT
+    error: Hsla,    // ERROR, ERR
+    critical: Hsla, // PANIC, FATAL, EMERGENCY, CRITICAL
+    warning: Hsla,  // WARNING, WARN
+    info: Hsla,     // INFO, NOTICE
+    debug: Hsla,    // DEBUG, TRACE, DBG
+    alert: Hsla,    // ALERT
 
     // Status indicators
-    success: Hsla,     // SUCCESS, OK, PASS, DONE, COMPLETED
-    failure: Hsla,     // FAILED, FAIL, FAILURE
-    pending: Hsla,     // PENDING, WAITING, PROCESSING
-    running: Hsla,     // RUNNING, ACTIVE, EXECUTING
-    stopped: Hsla,     // STOPPED, INACTIVE, HALTED, IDLE
-    skipped: Hsla,     // SKIPPED, SKIP
+    success: Hsla, // SUCCESS, OK, PASS, DONE, COMPLETED
+    failure: Hsla, // FAILED, FAIL, FAILURE
+    pending: Hsla, // PENDING, WAITING, PROCESSING
+    running: Hsla, // RUNNING, ACTIVE, EXECUTING
+    stopped: Hsla, // STOPPED, INACTIVE, HALTED, IDLE
+    skipped: Hsla, // SKIPPED, SKIP
 
     // Network
-    network_up: Hsla,      // UP, ONLINE, CONNECTED
-    network_down: Hsla,    // DOWN, OFFLINE, UNREACHABLE
-    timeout: Hsla,         // TIMEOUT, TIMED OUT
-    refused: Hsla,         // REFUSED, REJECTED, DENIED
+    network_up: Hsla,   // UP, ONLINE, CONNECTED
+    network_down: Hsla, // DOWN, OFFLINE, UNREACHABLE
+    timeout: Hsla,      // TIMEOUT, TIMED OUT
+    refused: Hsla,      // REFUSED, REJECTED, DENIED
 
     // Security & Auth
-    security: Hsla,    // SSH, SSL, TLS, CERTIFICATE
-    auth: Hsla,        // AUTHENTICATED, AUTHORIZED, LOGIN
-    danger: Hsla,      // ROOT, SUDO, PASSWORD, SECRET
+    security: Hsla, // SSH, SSL, TLS, CERTIFICATE
+    auth: Hsla,     // AUTHENTICATED, AUTHORIZED, LOGIN
+    danger: Hsla,   // ROOT, SUDO, PASSWORD, SECRET
 
     // Operations
-    started: Hsla,     // START, BOOT, STARTING
-    stopped_op: Hsla,  // STOP, SHUTDOWN, STOPPING
-    restart: Hsla,     // RESTART, RESTARTING
-    deploy: Hsla,      // DEPLOY, DEPLOYED, DEPLOYMENT
-    crashed: Hsla,     // CRASH, CRASHED, SIGSEGV
+    started: Hsla,    // START, BOOT, STARTING
+    stopped_op: Hsla, // STOP, SHUTDOWN, STOPPING
+    restart: Hsla,    // RESTART, RESTARTING
+    deploy: Hsla,     // DEPLOY, DEPLOYED, DEPLOYMENT
+    crashed: Hsla,    // CRASH, CRASHED, SIGSEGV
 
     // Resources
-    memory: Hsla,      // MEMORY, RAM, SWAP, HEAP
-    cpu: Hsla,         // CPU, PROCESSOR, CORE
-    disk: Hsla,        // DISK, STORAGE, PARTITION, MOUNT
+    memory: Hsla, // MEMORY, RAM, SWAP, HEAP
+    cpu: Hsla,    // CPU, PROCESSOR, CORE
+    disk: Hsla,   // DISK, STORAGE, PARTITION, MOUNT
 
     // HTTP codes
-    http_2xx: Hsla,    // 200-299 Success
-    http_3xx: Hsla,    // 300-399 Redirect
-    http_4xx: Hsla,    // 400-499 Client Error
-    http_5xx: Hsla,    // 500-599 Server Error
+    http_2xx: Hsla, // 200-299 Success
+    http_3xx: Hsla, // 300-399 Redirect
+    http_4xx: Hsla, // 400-499 Client Error
+    http_5xx: Hsla, // 500-599 Server Error
 
     // Dev / Exceptions
-    exception: Hsla,   // Exception, Traceback, Error type
-    deprecated: Hsla,  // DEPRECATED, TODO, FIXME
+    exception: Hsla,  // Exception, Traceback, Error type
+    deprecated: Hsla, // DEPRECATED, TODO, FIXME
 
     // Existing
-    network: Hsla,     // IP addresses
-    url: Hsla,         // http://, https://
-    port: Hsla,        // :22, :443, etc.
+    network: Hsla, // IP addresses
+    url: Hsla,     // http://, https://
+    port: Hsla,    // :22, :443, etc.
 }
 
 fn hsla(r: u8, g: u8, b: u8) -> Hsla {
@@ -100,58 +109,58 @@ fn hsla(r: u8, g: u8, b: u8) -> Hsla {
 fn highlight_colors() -> HighlightColors {
     HighlightColors {
         // Log levels
-        error:      hsla(224,  96,  96), // #E06060 red
-        critical:   hsla(255,  50,  50), // #FF3232 bright red
-        warning:    hsla(232, 201, 122), // #E8C97A yellow
-        info:       hsla(108, 180, 238), // #6CB4EE blue
-        debug:      hsla(130, 140, 155), // #828C9B gray
-        alert:      hsla(213, 126, 234), // #D57EEA bright magenta
+        error: hsla(224, 96, 96),     // #E06060 red
+        critical: hsla(255, 50, 50),  // #FF3232 bright red
+        warning: hsla(232, 201, 122), // #E8C97A yellow
+        info: hsla(108, 180, 238),    // #6CB4EE blue
+        debug: hsla(130, 140, 155),   // #828C9B gray
+        alert: hsla(213, 126, 234),   // #D57EEA bright magenta
 
         // Status
-        success:    hsla(126, 198, 153), // #7EC699 green
-        failure:    hsla(232, 168, 124), // #E8A87C orange
-        pending:    hsla(232, 201, 122), // #E8C97A yellow
-        running:    hsla( 86, 206, 234), // #56CEEA cyan
-        stopped:    hsla(160, 165, 175), // #A0A5AF gray
-        skipped:    hsla(199, 146, 234), // #C792EA purple
+        success: hsla(126, 198, 153), // #7EC699 green
+        failure: hsla(232, 168, 124), // #E8A87C orange
+        pending: hsla(232, 201, 122), // #E8C97A yellow
+        running: hsla(86, 206, 234),  // #56CEEA cyan
+        stopped: hsla(160, 165, 175), // #A0A5AF gray
+        skipped: hsla(199, 146, 234), // #C792EA purple
 
         // Network
-        network_up:   hsla(126, 198, 153), // #7EC699 green
-        network_down: hsla(224,  96,  96), // #E06060 red
-        timeout:      hsla(213, 126, 234), // #D57EEA magenta
-        refused:      hsla(245, 160,  80), // #F5A050 orange
+        network_up: hsla(126, 198, 153), // #7EC699 green
+        network_down: hsla(224, 96, 96), // #E06060 red
+        timeout: hsla(213, 126, 234),    // #D57EEA magenta
+        refused: hsla(245, 160, 80),     // #F5A050 orange
 
         // Security
-        security:   hsla( 86, 206, 234), // #56CEEA cyan
-        auth:       hsla(126, 198, 153), // #7EC699 green
-        danger:     hsla(180,  50,  50), // #B43232 dark red
+        security: hsla(86, 206, 234), // #56CEEA cyan
+        auth: hsla(126, 198, 153),    // #7EC699 green
+        danger: hsla(180, 50, 50),    // #B43232 dark red
 
         // Operations
-        started:    hsla(126, 198, 153), // #7EC699 green
-        stopped_op: hsla(224,  96,  96), // #E06060 red
-        restart:    hsla(232, 201, 122), // #E8C97A yellow
-        deploy:     hsla(100, 210, 140), // #64D28C bright green
-        crashed:    hsla(255,  50,  50), // #FF3232 bright red
+        started: hsla(126, 198, 153),  // #7EC699 green
+        stopped_op: hsla(224, 96, 96), // #E06060 red
+        restart: hsla(232, 201, 122),  // #E8C97A yellow
+        deploy: hsla(100, 210, 140),   // #64D28C bright green
+        crashed: hsla(255, 50, 50),    // #FF3232 bright red
 
         // Resources
-        memory:     hsla(199, 146, 234), // #C792EA purple
-        cpu:        hsla( 86, 206, 234), // #56CEEA cyan
-        disk:       hsla(108, 180, 238), // #6CB4EE blue
+        memory: hsla(199, 146, 234), // #C792EA purple
+        cpu: hsla(86, 206, 234),     // #56CEEA cyan
+        disk: hsla(108, 180, 238),   // #6CB4EE blue
 
         // HTTP codes
-        http_2xx:   hsla(126, 198, 153), // #7EC699 green
-        http_3xx:   hsla( 86, 206, 234), // #56CEEA cyan
-        http_4xx:   hsla(232, 201, 122), // #E8C97A yellow
-        http_5xx:   hsla(224,  96,  96), // #E06060 red
+        http_2xx: hsla(126, 198, 153), // #7EC699 green
+        http_3xx: hsla(86, 206, 234),  // #56CEEA cyan
+        http_4xx: hsla(232, 201, 122), // #E8C97A yellow
+        http_5xx: hsla(224, 96, 96),   // #E06060 red
 
         // Dev
-        exception:  hsla(224,  96,  96), // #E06060 red
-        deprecated: hsla(245, 160,  80), // #F5A050 orange
+        exception: hsla(224, 96, 96),   // #E06060 red
+        deprecated: hsla(245, 160, 80), // #F5A050 orange
 
         // Existing
-        network:    hsla(199, 146, 234), // #C792EA purple
-        url:        hsla( 86, 212, 199), // #56D4C7 teal
-        port:       hsla(130, 170, 200), // #82AAC8 muted teal
+        network: hsla(199, 146, 234), // #C792EA purple
+        url: hsla(86, 212, 199),      // #56D4C7 teal
+        port: hsla(130, 170, 200),    // #82AAC8 muted teal
     }
 }
 
@@ -202,18 +211,40 @@ fn highlight_http_codes(
     // Specific HTTP codes to highlight
     const HTTP_CODES: &[(u16, bool)] = &[
         // 2xx
-        (200, true), (201, true), (202, true), (204, true), (206, true),
+        (200, true),
+        (201, true),
+        (202, true),
+        (204, true),
+        (206, true),
         // 3xx
-        (301, true), (302, true), (304, true), (307, true), (308, true),
+        (301, true),
+        (302, true),
+        (304, true),
+        (307, true),
+        (308, true),
         // 4xx
-        (400, true), (401, true), (403, true), (404, true), (405, true),
-        (408, true), (409, true), (410, true), (422, true), (429, true),
+        (400, true),
+        (401, true),
+        (403, true),
+        (404, true),
+        (405, true),
+        (408, true),
+        (409, true),
+        (410, true),
+        (422, true),
+        (429, true),
         // 5xx
-        (500, true), (502, true), (503, true), (504, true),
+        (500, true),
+        (502, true),
+        (503, true),
+        (504, true),
     ];
 
     for i in 0..len.saturating_sub(2) {
-        if !bytes[i].is_ascii_digit() || !bytes[i + 1].is_ascii_digit() || !bytes[i + 2].is_ascii_digit() {
+        if !bytes[i].is_ascii_digit()
+            || !bytes[i + 1].is_ascii_digit()
+            || !bytes[i + 2].is_ascii_digit()
+        {
             continue;
         }
 
@@ -249,10 +280,7 @@ fn highlight_http_codes(
     }
 }
 
-pub fn highlight_cells(
-    cells: &[RenderCell],
-    rows: usize,
-) -> HashMap<(i32, i32), Hsla> {
+pub fn highlight_cells(cells: &[RenderCell], rows: usize) -> HashMap<(i32, i32), Hsla> {
     let colors = highlight_colors();
 
     let mut row_chars: Vec<Vec<(i32, char)>> = vec![Vec::with_capacity(128); rows];
@@ -289,178 +317,458 @@ pub fn highlight_cells(
         let text = chars_buf.as_str();
 
         // ── 1. Critical errors (highest priority) ──────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["PANIC", "EMERGENCY", "FATAL", "SEGFAULT", "CRITICAL",
-              "OOM", "OUT OF MEMORY", "KERNEL PANIC", "CORE DUMPED", "BUS ERROR"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "PANIC",
+                "EMERGENCY",
+                "FATAL",
+                "SEGFAULT",
+                "CRITICAL",
+                "OOM",
+                "OUT OF MEMORY",
+                "KERNEL PANIC",
+                "CORE DUMPED",
+                "BUS ERROR",
+            ],
             colors.critical,
         );
 
         // ── 2. Error keywords ──────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["ERROR", "ERR"], colors.error);
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &["ERROR", "ERR"],
+            colors.error,
+        );
 
         // ── 3. Alert ───────────────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["ALERT"], colors.alert);
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &["ALERT"],
+            colors.alert,
+        );
 
         // ── 4. Warning keywords ────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["WARNING", "WARN"], colors.warning);
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &["WARNING", "WARN"],
+            colors.warning,
+        );
 
         // ── 5. Info keywords ───────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["INFO", "INFORMATION", "NOTICE"], colors.info);
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &["INFO", "INFORMATION", "NOTICE"],
+            colors.info,
+        );
 
         // ── 6. Debug keywords ──────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["DEBUG", "DBG", "TRACE"], colors.debug);
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &["DEBUG", "DBG", "TRACE"],
+            colors.debug,
+        );
 
         // ── 7. Success status ──────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["SUCCESS", "SUCCEEDED", "SUCCESSFUL", "PASSED", "PASS",
-              "OK", "DONE", "COMPLETED", "FINISHED", "COMPLETE"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "SUCCESS",
+                "SUCCEEDED",
+                "SUCCESSFUL",
+                "PASSED",
+                "PASS",
+                "OK",
+                "DONE",
+                "COMPLETED",
+                "FINISHED",
+                "COMPLETE",
+            ],
             colors.success,
         );
 
         // ── 8. Failure status ──────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
             &["FAILED", "FAILURE", "FAIL", "NOT OK"],
             colors.failure,
         );
 
         // ── 9. Pending / Waiting ───────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
             &["PENDING", "WAITING", "PROCESSING", "IN PROGRESS", "QUEUED"],
             colors.pending,
         );
 
         // ── 10. Running / Active ───────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
             &["RUNNING", "ACTIVE", "EXECUTING", "IN_PROGRESS", "LIVE"],
             colors.running,
         );
 
         // ── 11. Stopped / Inactive ─────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
             &["STOPPED", "INACTIVE", "HALTED", "IDLE", "PAUSED"],
             colors.stopped,
         );
 
         // ── 12. Skipped ────────────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["SKIPPED", "SKIP", "SKIPPING"], colors.skipped);
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &["SKIPPED", "SKIP", "SKIPPING"],
+            colors.skipped,
+        );
 
         // ── 13. Network UP ─────────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["UP", "ONLINE", "CONNECTED", "REACHABLE", "LISTENING",
-              "ESTABLISHED", "LINK UP"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "UP",
+                "ONLINE",
+                "CONNECTED",
+                "REACHABLE",
+                "LISTENING",
+                "ESTABLISHED",
+                "LINK UP",
+            ],
             colors.network_up,
         );
 
         // ── 14. Network DOWN ───────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["DOWN", "OFFLINE", "UNREACHABLE", "DISCONNECTED",
-              "NOT LISTENING", "LINK DOWN", "NO CARRIER"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "DOWN",
+                "OFFLINE",
+                "UNREACHABLE",
+                "DISCONNECTED",
+                "NOT LISTENING",
+                "LINK DOWN",
+                "NO CARRIER",
+            ],
             colors.network_down,
         );
 
         // ── 15. Timeout ────────────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["TIMEOUT", "TIMED OUT", "TIMEOUTS", "ETIMEDOUT", "SLOW", "LATENCY"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "TIMEOUT",
+                "TIMED OUT",
+                "TIMEOUTS",
+                "ETIMEDOUT",
+                "SLOW",
+                "LATENCY",
+            ],
             colors.timeout,
         );
 
         // ── 16. Refused / Denied ───────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["REFUSED", "REJECTED", "DENIED", "PERMISSION DENIED",
-              "ACCESS DENIED", "FORBIDDEN", "BLOCKED", "DROP"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "REFUSED",
+                "REJECTED",
+                "DENIED",
+                "PERMISSION DENIED",
+                "ACCESS DENIED",
+                "FORBIDDEN",
+                "BLOCKED",
+                "DROP",
+            ],
             colors.refused,
         );
 
         // ── 17. Security / Protocol ────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["SSH", "SSHD", "SSL", "TLS", "HTTPS", "CERTIFICATE", "CERT",
-              "FIREWALL", "IPTABLES", "ACL", "WAF"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "SSH",
+                "SSHD",
+                "SSL",
+                "TLS",
+                "HTTPS",
+                "CERTIFICATE",
+                "CERT",
+                "FIREWALL",
+                "IPTABLES",
+                "ACL",
+                "WAF",
+            ],
             colors.security,
         );
 
         // ── 18. Authentication ─────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["AUTHENTICATED", "ACCEPTED", "AUTHORIZED", "LOGIN", "LOGOUT",
-              "LOGGED IN", "LOGGED OUT", "SESSION"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "AUTHENTICATED",
+                "ACCEPTED",
+                "AUTHORIZED",
+                "LOGIN",
+                "LOGOUT",
+                "LOGGED IN",
+                "LOGGED OUT",
+                "SESSION",
+            ],
             colors.auth,
         );
 
         // ── 19. Danger (root/sudo/secrets) ─────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["ROOT", "SUDO", "UID=0", "PASSWORD", "SECRET", "TOKEN",
-              "API_KEY", "APIKEY", "PRIVATE KEY", "CREDENTIALS"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "ROOT",
+                "SUDO",
+                "UID=0",
+                "PASSWORD",
+                "SECRET",
+                "TOKEN",
+                "API_KEY",
+                "APIKEY",
+                "PRIVATE KEY",
+                "CREDENTIALS",
+            ],
             colors.danger,
         );
 
         // ── 20. Operations: Start ──────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["STARTED", "START", "STARTING", "BOOT", "BOOTING", "LAUNCHED", "LAUNCH"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "STARTED", "START", "STARTING", "BOOT", "BOOTING", "LAUNCHED", "LAUNCH",
+            ],
             colors.started,
         );
 
         // ── 21. Operations: Stop ───────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["STOPPED", "STOP", "STOPPING", "SHUTDOWN", "SHUTTING DOWN", "TERMINATED"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "STOPPED",
+                "STOP",
+                "STOPPING",
+                "SHUTDOWN",
+                "SHUTTING DOWN",
+                "TERMINATED",
+            ],
             colors.stopped_op,
         );
 
         // ── 22. Operations: Restart ────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["RESTARTED", "RESTART", "RESTARTING", "RELOAD", "RELOADED", "RELOADING"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "RESTARTED",
+                "RESTART",
+                "RESTARTING",
+                "RELOAD",
+                "RELOADED",
+                "RELOADING",
+            ],
             colors.restart,
         );
 
         // ── 23. Operations: Deploy ─────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["DEPLOYED", "DEPLOYMENT", "DEPLOYING", "DEPLOY",
-              "ROLLBACK", "ROLLED BACK", "ROLLING BACK", "UPGRADE", "UPGRADED"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "DEPLOYED",
+                "DEPLOYMENT",
+                "DEPLOYING",
+                "DEPLOY",
+                "ROLLBACK",
+                "ROLLED BACK",
+                "ROLLING BACK",
+                "UPGRADE",
+                "UPGRADED",
+            ],
             colors.deploy,
         );
 
         // ── 24. Operations: Crash ──────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["CRASH", "CRASHED", "CRASHING", "SIGSEGV", "SIGABRT", "SIGKILL",
-              "DIED", "EXITED", "EXIT CODE", "CORE DUMP"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "CRASH",
+                "CRASHED",
+                "CRASHING",
+                "SIGSEGV",
+                "SIGABRT",
+                "SIGKILL",
+                "DIED",
+                "EXITED",
+                "EXIT CODE",
+                "CORE DUMP",
+            ],
             colors.crashed,
         );
 
         // ── 25. Resources: Memory ──────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
             &["MEMORY", "RAM", "HEAP", "STACK", "SWAP", "MEM"],
             colors.memory,
         );
 
         // ── 26. Resources: CPU ─────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["CPU", "PROCESSOR", "CORE", "CORES", "THREAD", "THREADS", "LOAD"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "CPU",
+                "PROCESSOR",
+                "CORE",
+                "CORES",
+                "THREAD",
+                "THREADS",
+                "LOAD",
+            ],
             colors.cpu,
         );
 
         // ── 27. Resources: Disk ────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["DISK", "STORAGE", "PARTITION", "MOUNT", "FILESYSTEM",
-              "INODE", "IOPS", "READ", "WRITE"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "DISK",
+                "STORAGE",
+                "PARTITION",
+                "MOUNT",
+                "FILESYSTEM",
+                "INODE",
+                "IOPS",
+                "READ",
+                "WRITE",
+            ],
             colors.disk,
         );
 
         // ── 28. Dev: Exceptions ────────────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["EXCEPTION", "TRACEBACK", "THROW", "THROWN", "STACKTRACE",
-              "TYPEERROR", "VALUEERROR", "KEYERROR", "ATTRIBUTEERROR",
-              "INDEXERROR", "RUNTIMEERROR", "IOERROR", "OSERROR",
-              "NULLPOINTER", "NPE", "SEGFAULT"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "EXCEPTION",
+                "TRACEBACK",
+                "THROW",
+                "THROWN",
+                "STACKTRACE",
+                "TYPEERROR",
+                "VALUEERROR",
+                "KEYERROR",
+                "ATTRIBUTEERROR",
+                "INDEXERROR",
+                "RUNTIMEERROR",
+                "IOERROR",
+                "OSERROR",
+                "NULLPOINTER",
+                "NPE",
+                "SEGFAULT",
+            ],
             colors.exception,
         );
 
         // ── 29. Dev: Deprecated / TODO ─────────────────────────
-        highlight_keywords(&mut map, text, &byte_to_col, row_i32,
-            &["DEPRECATED", "TODO", "FIXME", "HACK", "XXX", "WORKAROUND", "TEMPORARY"],
+        highlight_keywords(
+            &mut map,
+            text,
+            &byte_to_col,
+            row_i32,
+            &[
+                "DEPRECATED",
+                "TODO",
+                "FIXME",
+                "HACK",
+                "XXX",
+                "WORKAROUND",
+                "TEMPORARY",
+            ],
             colors.deprecated,
         );
 
@@ -477,8 +785,6 @@ pub fn highlight_cells(
             }
         }
 
-
-
         // ── 33. Port numbers ───────────────────────────────────
         for m in find_ports(text) {
             let port_len = find_port_len(&text[m..]);
@@ -537,11 +843,7 @@ fn find_ip_len(text: &str) -> usize {
         len += 1;
     }
 
-    if dots == 3 && digits > 0 {
-        len
-    } else {
-        0
-    }
+    if dots == 3 && digits > 0 { len } else { 0 }
 }
 
 fn find_ip_addresses(text: &str) -> Vec<usize> {
@@ -550,16 +852,12 @@ fn find_ip_addresses(text: &str) -> Vec<usize> {
     let len = bytes.len();
 
     for i in 0..len {
-        if bytes[i].is_ascii_digit()
-            && (i == 0 || is_boundary(bytes[i - 1] as char))
-        {
+        if bytes[i].is_ascii_digit() && (i == 0 || is_boundary(bytes[i - 1] as char)) {
             let remaining = &text[i..];
             let ip_len = find_ip_len(remaining);
             if ip_len > 0 {
                 let ip_str = &remaining[..ip_len];
-                let valid = ip_str
-                    .split('.')
-                    .all(|octet| octet.parse::<u8>().is_ok());
+                let valid = ip_str.split('.').all(|octet| octet.parse::<u8>().is_ok());
                 if valid {
                     positions.push(i);
                 }
@@ -671,7 +969,9 @@ pub fn build_logical_lines<'a>(cells: &'a [RenderCell], rows: usize) -> Vec<Logi
         let wraps_from_prev = row_idx > 0 && {
             current_line.as_ref().map_or(false, |line| {
                 line.row_cells.last().map_or(false, |rc| {
-                    rc.cell.flags.contains(alacritty_terminal::term::cell::Flags::WRAPLINE)
+                    rc.cell
+                        .flags
+                        .contains(alacritty_terminal::term::cell::Flags::WRAPLINE)
                 })
             })
         };
@@ -738,4 +1038,3 @@ pub fn find_url_at_cell(
     }
     None
 }
-

src/terminal/input.rs

@@ -42,10 +42,10 @@ impl Ashell {
             && !event.keystroke.modifiers.platform
         {
             match event.keystroke.key.to_ascii_lowercase().as_str() {
-                "h" => self.focus_adjacent_pane("left"),
-                "j" => self.focus_adjacent_pane("down"),
-                "k" => self.focus_adjacent_pane("up"),
-                "l" => self.focus_adjacent_pane("right"),
+                "h" => self.focus_adjacent_pane("left", cx),
+                "j" => self.focus_adjacent_pane("down", cx),
+                "k" => self.focus_adjacent_pane("up", cx),
+                "l" => self.focus_adjacent_pane("right", cx),
                 "q" => {
                     if let Some(active_id) = self.active_tab.clone() {
                         self.close_tab(active_id, cx);
@@ -165,7 +165,7 @@ impl Ashell {
             return;
         };
 
-        if tab.render_snapshot().display_offset > 0 {
+        if tab.render_snapshot(false).display_offset > 0 {
             tab.scroll_to_bottom();
         }
         tab.clear_selection();
@@ -204,7 +204,7 @@ impl Ashell {
             return;
         };
 
-        if tab.render_snapshot().display_offset > 0 {
+        if tab.render_snapshot(false).display_offset > 0 {
             tab.scroll_to_bottom();
         }
 
@@ -236,7 +236,7 @@ impl Ashell {
             return;
         };
 
-        if tab.render_snapshot().display_offset > 0 {
+        if tab.render_snapshot(false).display_offset > 0 {
             tab.scroll_to_bottom();
         }
         tab.clear_selection();
@@ -291,7 +291,7 @@ impl Ashell {
             return;
         };
 
-        if tab.render_snapshot().display_offset > 0 {
+        if tab.render_snapshot(false).display_offset > 0 {
             tab.scroll_to_bottom();
         }
         tab.clear_selection();
@@ -387,7 +387,12 @@ impl Ashell {
         if let Some((row, col, _side)) = self.terminal_grid_point_and_side(event.position) {
             if let Some(snapshot) = self.active_snapshot() {
                 if let Some(active_id) = &self.active_tab {
-                    if let Some((url, url_cells)) = crate::terminal::highlight::find_url_at_cell(&snapshot.cells, snapshot.rows, row, col) {
+                    if let Some((url, url_cells)) = crate::terminal::highlight::find_url_at_cell(
+                        &snapshot.cells,
+                        snapshot.rows,
+                        row,
+                        col,
+                    ) {
                         hovered_url = Some(crate::app::HoveredUrl {
                             url,
                             tab_id: active_id.clone(),
@@ -397,7 +402,7 @@ impl Ashell {
                 }
             }
         }
-        
+
         if self.hovered_url != hovered_url || self.cmd_ctrl_pressed != cmd_ctrl_pressed {
             self.hovered_url = hovered_url;
             self.cmd_ctrl_pressed = cmd_ctrl_pressed;

src/terminal/mod.rs

@@ -1,7 +1,7 @@
 pub mod custom_blocks;
 pub mod element;
-pub mod input;
 pub mod highlight;
+pub mod input;
 
 use std::sync::mpsc::Sender;
 
@@ -23,6 +23,7 @@ use crate::system::SystemSnapshot;
 pub enum TabKind {
     Local,
     Ssh,
+    Serial,
 }
 
 #[derive(Debug)]
@@ -98,6 +99,7 @@ pub enum BackendEvent {
 pub enum BackendTx {
     Local(Sender<BackendCommand>),
     Ssh(tokio::sync::mpsc::UnboundedSender<BackendCommand>),
+    Serial(tokio::sync::mpsc::UnboundedSender<BackendCommand>),
 }
 
 impl BackendTx {
@@ -109,6 +111,9 @@ impl BackendTx {
             Self::Ssh(tx) => {
                 let _ = tx.send(command);
             }
+            Self::Serial(tx) => {
+                let _ = tx.send(command);
+            }
         }
     }
 }
@@ -116,6 +121,7 @@ impl BackendTx {
 pub struct TerminalTab {
     pub id: String,
     pub title: String,
+    pub dynamic_title: String,
     pub kind: TabKind,
     pub status: String,
     pub connected: bool,
@@ -134,7 +140,12 @@ pub struct TerminalTab {
     pub rows: u16,
     pub backend: std::sync::Arc<std::sync::Mutex<BackendTx>>,
     pub scroll_pixel_y: f32,
-    pub(crate) highlight_cache: std::cell::RefCell<Option<(Vec<RenderCell>, std::collections::HashMap<(i32, i32), gpui::Hsla>)>>,
+    pub(crate) highlight_cache: std::cell::RefCell<
+        Option<(
+            Vec<RenderCell>,
+            std::collections::HashMap<(i32, i32), gpui::Hsla>,
+        )>,
+    >,
 }
 
 #[derive(Clone, Copy)]
@@ -222,6 +233,25 @@ impl TerminalTab {
         tab
     }
 
+    pub fn new_serial(
+        id: String,
+        session: &Session,
+        backend: BackendTx,
+        events: std::sync::mpsc::Sender<BackendEvent>,
+    ) -> Self {
+        let mut tab = Self::new(
+            id,
+            session.name.clone(),
+            TabKind::Serial,
+            format!("connecting serial://{}@{}", session.host, session.baud_rate),
+            backend,
+            events,
+        );
+        tab.session = Some(session.clone());
+        tab.connected = false;
+        tab
+    }
+
     fn new(
         id: String,
         title: String,
@@ -233,7 +263,8 @@ impl TerminalTab {
         let shared_backend = std::sync::Arc::new(std::sync::Mutex::new(backend));
         Self {
             id: id.clone(),
-            title,
+            title: title.clone(),
+            dynamic_title: title,
             kind,
             status,
             connected: matches!(kind, TabKind::Local),
@@ -242,7 +273,7 @@ impl TerminalTab {
             backend_initialized: true,
             session: None,
             processor: Processor::new(),
-            term: new_term(100, 30, shared_backend.clone(), id, events),
+            term: new_term(100, 30, shared_backend.clone(), id, events.clone()),
             cols: 100,
             rows: 30,
             backend: shared_backend,
@@ -312,7 +343,7 @@ impl TerminalTab {
         self.term.mode().contains(TermMode::APP_CURSOR)
     }
 
-    pub fn render_snapshot(&self) -> RenderSnapshot {
+    pub fn render_snapshot(&self, keyword_highlight: bool) -> RenderSnapshot {
         let rows = self.rows;
         let cols = self.cols;
         let content = self.term.renderable_content();
@@ -342,15 +373,13 @@ impl TerminalTab {
         }
 
         // Get highlights from cache or recompute, only if keyword_highlight is enabled.
-        let is_enabled = crate::session::config::ConfigStore::load()
-            .map(|c| c.keyword_highlight())
-            .unwrap_or(false);
+        let is_enabled = keyword_highlight;
 
         let highlights = if is_enabled {
             let mut cache = self.highlight_cache.borrow_mut();
-            let cache_valid = cache.as_ref().is_some_and(|(cached_cells, _)| {
-                cached_cells == &cells
-            });
+            let cache_valid = cache
+                .as_ref()
+                .is_some_and(|(cached_cells, _)| cached_cells == &cells);
             if cache_valid {
                 cache.as_ref().unwrap().1.clone()
             } else {
@@ -503,7 +532,10 @@ fn viewport_selection_from_range(
     } = selection.as_ref().copied()?;
 
     let top_point = viewport_to_point(display_offset, Point::new(0, Column(0)));
-    let bottom_point = viewport_to_point(display_offset, Point::new(rows.saturating_sub(1), Column(0)));
+    let bottom_point = viewport_to_point(
+        display_offset,
+        Point::new(rows.saturating_sub(1), Column(0)),
+    );
 
     let top_line = top_point.line;
     let bottom_line = bottom_point.line;
@@ -521,7 +553,10 @@ fn viewport_selection_from_range(
     } else if end.line > bottom_line {
         Point::new(rows.saturating_sub(1), Column(cols.saturating_sub(1)))
     } else {
-        point_to_viewport(display_offset, end).unwrap_or(Point::new(rows.saturating_sub(1), Column(cols.saturating_sub(1))))
+        point_to_viewport(display_offset, end).unwrap_or(Point::new(
+            rows.saturating_sub(1),
+            Column(cols.saturating_sub(1)),
+        ))
     };
 
     Some(ViewportSelection {
@@ -729,6 +764,18 @@ fn zed_like_to_esc_str(
         ("^", TerminalModifiers::Ctrl) => Some("\x1e"),
         ("_", TerminalModifiers::Ctrl) => Some("\x1f"),
         ("?", TerminalModifiers::Ctrl) => Some("\x7f"),
+        ("f1", TerminalModifiers::None) => Some("\x1bOP"),
+        ("f2", TerminalModifiers::None) => Some("\x1bOQ"),
+        ("f3", TerminalModifiers::None) => Some("\x1bOR"),
+        ("f4", TerminalModifiers::None) => Some("\x1bOS"),
+        ("f5", TerminalModifiers::None) => Some("\x1b[15~"),
+        ("f6", TerminalModifiers::None) => Some("\x1b[17~"),
+        ("f7", TerminalModifiers::None) => Some("\x1b[18~"),
+        ("f8", TerminalModifiers::None) => Some("\x1b[19~"),
+        ("f9", TerminalModifiers::None) => Some("\x1b[20~"),
+        ("f10", TerminalModifiers::None) => Some("\x1b[21~"),
+        ("f11", TerminalModifiers::None) => Some("\x1b[23~"),
+        ("f12", TerminalModifiers::None) => Some("\x1b[24~"),
         _ => None,
     };
     if let Some(esc) = manual_esc_str {
@@ -747,6 +794,18 @@ fn zed_like_to_esc_str(
             "pagedown" => Some(format!("\x1b[6;{}~", modifier_code)),
             "end" => Some(format!("\x1b[1;{}F", modifier_code)),
             "home" => Some(format!("\x1b[1;{}H", modifier_code)),
+            "f1" => Some(format!("\x1b[1;{}P", modifier_code)),
+            "f2" => Some(format!("\x1b[1;{}Q", modifier_code)),
+            "f3" => Some(format!("\x1b[1;{}R", modifier_code)),
+            "f4" => Some(format!("\x1b[1;{}S", modifier_code)),
+            "f5" => Some(format!("\x1b[15;{}~", modifier_code)),
+            "f6" => Some(format!("\x1b[17;{}~", modifier_code)),
+            "f7" => Some(format!("\x1b[18;{}~", modifier_code)),
+            "f8" => Some(format!("\x1b[19;{}~", modifier_code)),
+            "f9" => Some(format!("\x1b[20;{}~", modifier_code)),
+            "f10" => Some(format!("\x1b[21;{}~", modifier_code)),
+            "f11" => Some(format!("\x1b[23;{}~", modifier_code)),
+            "f12" => Some(format!("\x1b[24;{}~", modifier_code)),
             _ => None,
         };
         if let Some(esc) = modified {