feat: native notifications + in-app update checker

- Register tauri-plugin-notification; inject initialization script that
  patches window.Notification to route through the native plugin and
  always report permission as granted — bypasses WebView2's default deny
- Also grant COREWEBVIEW2_PERMISSION_KIND_NOTIFICATIONS via existing
  PermissionRequestedEventHandler
- Register tauri-plugin-updater; add check_for_update and install_update
  commands using the pubkey/endpoint already in tauri.conf.json

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src-tauri/src/lib.rs

@@ -6,6 +6,93 @@
 use tauri::{webview::{NewWindowResponse, WebviewWindowBuilder}, WebviewUrl};
 use tauri_plugin_opener::OpenerExt;
 
+// Injected into every page before app scripts load.
+// Patches window.Notification to route through tauri-plugin-notification so
+// WebView2's default "denied" state never reaches cinny's permission check.
+// Also patches navigator.permissions.query so the React hook sees "granted".
+const NOTIFICATION_BRIDGE: &str = r#"(function(){
+  function TauriNotification(title,options){
+    var opts=options||{};
+    try{
+      window.__TAURI_INTERNALS__.invoke('send_notification',{
+        title:String(title),
+        body:opts.body!=null?String(opts.body):undefined
+      }).catch(function(){});
+    }catch(_){}
+  }
+  TauriNotification.prototype=Object.create(EventTarget.prototype);
+  TauriNotification.prototype.constructor=TauriNotification;
+  TauriNotification.prototype.close=function(){};
+  Object.defineProperty(TauriNotification,'permission',{get:function(){return 'granted';},configurable:true});
+  TauriNotification.requestPermission=function(){return Promise.resolve('granted');};
+  TauriNotification.maxActions=0;
+  Object.defineProperty(window,'Notification',{value:TauriNotification,writable:true,configurable:true});
+  var _q=navigator.permissions.query.bind(navigator.permissions);
+  navigator.permissions.query=function(desc){
+    if(desc&&desc.name==='notifications'){
+      return Promise.resolve(Object.assign(new EventTarget(),{state:'granted',onchange:null}));
+    }
+    return _q(desc);
+  };
+})();"#;
+
+#[tauri::command]
+fn send_notification(
+    app: tauri::AppHandle,
+    title: String,
+    body: Option<String>,
+) -> Result<(), String> {
+    use tauri_plugin_notification::NotificationExt;
+    let mut builder = app.notification().builder().title(&title);
+    if let Some(b) = &body {
+        builder = builder.body(b);
+    }
+    builder.show().map_err(|e| e.to_string())
+}
+
+#[derive(serde::Serialize)]
+struct UpdateInfo {
+    available: bool,
+    version: Option<String>,
+}
+
+#[tauri::command]
+async fn check_for_update(app: tauri::AppHandle) -> Result<UpdateInfo, String> {
+    #[cfg(not(any(target_os = "android", target_os = "ios")))]
+    {
+        use tauri_plugin_updater::UpdaterExt;
+        match app.updater().map_err(|e| e.to_string())?.check().await {
+            Ok(Some(update)) => {
+                return Ok(UpdateInfo { available: true, version: Some(update.version) });
+            }
+            Ok(None) => return Ok(UpdateInfo { available: false, version: None }),
+            Err(e) => return Err(e.to_string()),
+        }
+    }
+    Ok(UpdateInfo { available: false, version: None })
+}
+
+#[tauri::command]
+async fn install_update(app: tauri::AppHandle) -> Result<(), String> {
+    #[cfg(not(any(target_os = "android", target_os = "ios")))]
+    {
+        use tauri_plugin_updater::UpdaterExt;
+        if let Some(update) = app
+            .updater()
+            .map_err(|e| e.to_string())?
+            .check()
+            .await
+            .map_err(|e| e.to_string())?
+        {
+            update
+                .download_and_install(|_chunk, _total| {}, || {})
+                .await
+                .map_err(|e| e.to_string())?;
+        }
+    }
+    Ok(())
+}
+
 #[tauri::command]
 fn set_badge_count(count: u32, window: tauri::Window) -> Result<(), String> {
     #[cfg(target_os = "windows")]
@@ -63,14 +150,12 @@ fn set_badge_count(count: u32, window: tauri::Window) -> Result<(), String> {
                     .map_err(|e| e.to_string())?;
                 let old_bm = SelectObject(hdc, hbm_color);
 
-                // Red circle (COLORREF is 0x00BBGGRR)
                 let hbrush = CreateSolidBrush(COLORREF(0x003030DD));
                 let old_brush = SelectObject(hdc, hbrush);
                 let hpen = CreatePen(PS_NULL, 0, COLORREF(0));
                 let old_pen = SelectObject(hdc, hpen);
                 let _ = Ellipse(hdc, 0, 0, size, size);
 
-                // White bold text centered
                 let hfont = CreateFontW(
                     11, 0, 0, 0, FW_BOLD.0 as i32, 0, 0, 0,
                     DEFAULT_CHARSET.0 as u32,
@@ -142,13 +227,26 @@ fn set_badge_count(count: u32, window: tauri::Window) -> Result<(), String> {
 pub fn run() {
     let port: u16 = 44548;
     let context = tauri::generate_context!();
-    let builder = tauri::Builder::default();
 
-    builder
-        .invoke_handler(tauri::generate_handler![set_badge_count])
+    #[allow(unused_mut)]
+    let mut builder = tauri::Builder::default()
+        .invoke_handler(tauri::generate_handler![
+            set_badge_count,
+            send_notification,
+            check_for_update,
+            install_update,
+        ])
         .plugin(tauri_plugin_localhost::Builder::new(port).build())
         .plugin(tauri_plugin_window_state::Builder::default().build())
         .plugin(tauri_plugin_opener::init())
+        .plugin(tauri_plugin_notification::init());
+
+    #[cfg(not(any(target_os = "android", target_os = "ios")))]
+    {
+        builder = builder.plugin(tauri_plugin_updater::Builder::new().build());
+    }
+
+    builder
         .setup(move |app| {
             #[cfg(debug_assertions)]
             let window_url = WebviewUrl::App(Default::default());
@@ -162,6 +260,7 @@ pub fn run() {
             let app_handle = app.handle().clone();
             let window = WebviewWindowBuilder::new(app, "main".to_string(), window_url)
                 .title("Lotus Chat")
+                .initialization_script(NOTIFICATION_BRIDGE)
                 .disable_drag_drop_handler()
                 .on_new_window(move |url, _features| {
                     let _ = app_handle.opener().open_url(url.as_str(), None::<&str>);
@@ -169,8 +268,7 @@ pub fn run() {
                 })
                 .build()?;
 
-            // Grant camera and microphone to WebView2 automatically.
-            // Windows requires an explicit PermissionRequested COM event handler.
+            // Auto-grant camera, microphone, and notification permissions in WebView2.
             #[cfg(target_os = "windows")]
             window.with_webview(|webview| {
                 use webview2_com::{
@@ -178,6 +276,7 @@ pub fn run() {
                         COREWEBVIEW2_PERMISSION_KIND,
                         COREWEBVIEW2_PERMISSION_KIND_CAMERA,
                         COREWEBVIEW2_PERMISSION_KIND_MICROPHONE,
+                        COREWEBVIEW2_PERMISSION_KIND_NOTIFICATIONS,
                         COREWEBVIEW2_PERMISSION_STATE_ALLOW,
                     },
                     PermissionRequestedEventHandler,
@@ -192,6 +291,7 @@ pub fn run() {
                                 unsafe { args.PermissionKind(&mut kind) }?;
                                 if kind == COREWEBVIEW2_PERMISSION_KIND_MICROPHONE
                                     || kind == COREWEBVIEW2_PERMISSION_KIND_CAMERA
+                                    || kind == COREWEBVIEW2_PERMISSION_KIND_NOTIFICATIONS
                                 {
                                     unsafe {
                                         args.SetState(COREWEBVIEW2_PERMISSION_STATE_ALLOW)