fix(mobile): link SystemConfiguration and install a rustls provider on iOS

The first iOS build failed to link: netdev and system-configuration, pulled
in by iroh, need SystemConfiguration.framework, which the generated Xcode
project does not list. bundle.iOS.frameworks adds it on `tauri ios init`.

Once linked, the app panicked at launch: iroh builds its reqwest client with
`rustls-no-provider`, so a process-wide crypto provider must be installed
before any client is built. Install ring's, which is already in the tree.

Co-Authored-By: Claude <noreply@anthropic.com>

mobile/src-tauri/Cargo.lock

@@ -5487,6 +5487,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "iroh",
+ "rustls",
  "serde",
  "serde_json",
  "tauri",

mobile/src-tauri/Cargo.toml

@@ -26,6 +26,7 @@ tty7-mobile-proto = { path = "../../crates/tty7-mobile-proto" }
 
 anyhow = "1"
 iroh = "1.2"
+rustls = { version = "0.23", default-features = false, features = ["ring"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 tauri = { version = "2", features = [] }

mobile/src-tauri/src/lib.rs

@@ -392,6 +392,11 @@ async fn pane_close(state: State<'_, Arc<AppState>>, handle: u32) -> CmdResult<(
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
+    // iroh builds its reqwest client with `rustls-no-provider`, which panics
+    // unless a process-wide provider is installed first. `ring` is the one
+    // already in the tree. An `Err` means one is installed, which is fine.
+    let _ = rustls::crypto::ring::default_provider().install_default();
+
     tauri::Builder::default()
         .setup(|app| {
             let dir = app.path().app_data_dir()?;

mobile/src-tauri/tauri.conf.json

@@ -31,6 +31,11 @@
       "icons/128x128@2x.png",
       "icons/icon.icns",
       "icons/icon.ico"
-    ]
+    ],
+    "iOS": {
+      "frameworks": [
+        "SystemConfiguration"
+      ]
+    }
   }
 }