feat(theme): add One Dark Pro built-in theme

Add One Dark Pro as a ninth built-in, slotted alphabetically among the
dark themes: background #282c34, foreground #abb2bf, the classic One
Dark syntax palette for the normal ANSI slots and One Dark Pro's bright
variants for the bright ones.

Two seeds deliberately diverge from the VS Code theme's terminal set:

* The accent is the editor cursor/focus blue #528bff, not the syntax
  blue #61afef — the accent doubles as the switch's checked track, and
  #61afef sits at the same luminance as the #abb2bf knob (1.11:1).
* The normal red is the classic #e06c75, not the Pro terminal #e05561 —
  conditioned for AA the latter lands within 37 channel-distance of the
  orange-yellow #d18f52, under the 40 separability floor danger/warning
  must clear.

Also bumps the theme count in README and docs (eight → nine).

README.md

@@ -41,7 +41,7 @@ Native builds for each platform on [**Releases**](https://github.com/l0ng-ai/tty
 | | |
 |---|---|
 | **Input** | ghost suggestions from history · explained tab completion · syntax highlighting · multi-line editing · click places the caret · <kbd>⌃ R</kbd> fuzzy history |
-| **Window** | tabs & splits · <kbd>⌘ P</kbd> palette · <kbd>⌘ F</kbd> scrollback search · eight themes · IME |
+| **Window** | tabs & splits · <kbd>⌘ P</kbd> palette · <kbd>⌘ F</kbd> scrollback search · nine themes · IME |
 | **Coding agents** | per-pane agent detection (~17 CLIs): status dot, notifications, branch + diff, resume after reboot, tray icon that signals "needs your input" |
 | **SSH** | native russh stack: profiles with keychain secrets, SFTP panel, port forwarding, jump hosts |
 

docs/features.md

@@ -19,7 +19,7 @@
 - **Command palette** <kbd>⌘ P</kbd> · scrollback search <kbd>⌘ F</kbd>
 - **⌘/Ctrl-click links** (⌘ on macOS, Ctrl on Windows/Linux) · desktop notifications · copy on select (opt-in, Settings → Terminal → Clipboard)
 - **Smart double-click selection** — double-click grabs the whole URL, file path, bracket/quote pair, or dictionary-segmented CJK word under the cursor; Shift-click extends a selection (toggle in Settings → Terminal → Mouse; word separators via `word_separators` in `config.json`)
-- **Eight themes, plus your own** — YAML seed themes with solid, gradient, or image backgrounds; iTerm2 `.itermcolors` import; in-app color editor with a background-image picker
+- **Nine themes, plus your own** — YAML seed themes with solid, gradient, or image backgrounds; iTerm2 `.itermcolors` import; in-app color editor with a background-image picker
 - **Sync with system** — Settings → Appearance; pick separate light and dark themes and tty7 follows the OS appearance live (`theme_follow_system`, `theme_preset_light` / `theme_preset_dark` in `config.json`)
 - **Window opacity & blur** — Settings → Appearance → Window; applies to every theme, *Follow theme* returns to the theme's own `opacity` / `blur`
 - **CJK / IME input**

docs/features.zh-CN.md

@@ -19,7 +19,7 @@
 - **命令面板** <kbd>⌘ P</kbd> · 回滚搜索 <kbd>⌘ F</kbd>
 - **⌘ 点击打开链接** · 桌面通知 · 划选即复制（可选，设置 → 终端 → 剪贴板）
 - **智能双击选中** —— 双击直接选中整条 URL、文件路径、括号/引号对，中文按词典分词出词；Shift 点击扩展选区（设置 → 终端 → 鼠标可开关；分隔符用 `config.json` 的 `word_separators` 配置）
-- **8 套主题，也能自定义** — YAML 种子主题，背景支持纯色、渐变或图片；可导入 iTerm2 `.itermcolors`；应用内颜色编辑器带背景图选择
+- **9 套主题，也能自定义** — YAML 种子主题，背景支持纯色、渐变或图片；可导入 iTerm2 `.itermcolors`；应用内颜色编辑器带背景图选择
 - **跟随系统外观** — 设置 → Appearance；分别选好浅色和深色主题，tty7 随系统深浅模式实时切换（`config.json` 中的 `theme_follow_system`、`theme_preset_light` / `theme_preset_dark`）
 - **窗口透明与模糊** — 设置 → Appearance → Window；对所有主题生效，*Follow theme* 恢复主题自带的 `opacity` / `blur`
 - **CJK / 输入法输入**

src/ui/presets.rs

@@ -1109,7 +1109,7 @@ struct BuiltinSpec {
 }
 
 /// A hand-picked set of familiar terminal palettes.
-static BUILTINS: [BuiltinSpec; 8] = [
+static BUILTINS: [BuiltinSpec; 9] = [
     BuiltinSpec {
         id: "light",
         name: "Light",
@@ -1295,6 +1295,35 @@ static BUILTINS: [BuiltinSpec; 8] = [
             (0xff, 0xff, 0xff),
         ],
     },
+    BuiltinSpec {
+        id: "one_dark_pro",
+        name: "One Dark Pro",
+        background: 0x282c34,
+        foreground: 0xabb2bf,
+        // The editor cursor / focus blue, not the syntax blue `#61afef`: the
+        // accent doubles as the switch's checked track, and `#61afef` sits at
+        // the same luminance as the `#abb2bf` knob (1.11:1 — invisible).
+        accent: 0x528bff,
+        caret: None,
+        ansi16: [
+            (0x3f, 0x44, 0x51),
+            (0xe0, 0x6c, 0x75),
+            (0x98, 0xc3, 0x79),
+            (0xe5, 0xc0, 0x7b),
+            (0x61, 0xaf, 0xef),
+            (0xc6, 0x78, 0xdd),
+            (0x56, 0xb6, 0xc2),
+            (0xab, 0xb2, 0xbf),
+            (0x5c, 0x63, 0x70),
+            (0xff, 0x61, 0x6e),
+            (0xa5, 0xe0, 0x75),
+            (0xf0, 0xa4, 0x5d),
+            (0x4d, 0xc4, 0xff),
+            (0xde, 0x73, 0xff),
+            (0x4c, 0xd1, 0xe0),
+            (0xe6, 0xe6, 0xe6),
+        ],
+    },
     BuiltinSpec {
         id: "rose_pine",
         name: "Rosé Pine",
@@ -1341,7 +1370,7 @@ mod tests {
     }
 
     /// Brightness is inferred correctly: the four light built-ins classify light,
-    /// the four dark ones dark.
+    /// the five dark ones dark.
     #[test]
     fn dark_is_inferred_from_background() {
         let dark: Vec<_> = builtins()
@@ -1349,7 +1378,10 @@ mod tests {
             .filter(|t| t.dark)
             .map(|t| t.id)
             .collect();
-        assert_eq!(dark, ["dark", "dracula", "harbor", "rose_pine"]);
+        assert_eq!(
+            dark,
+            ["dark", "dracula", "harbor", "one_dark_pro", "rose_pine"]
+        );
     }
 
     /// The selection surface must stay a *tint* — decisively on the background's