feat(desktop): enhance error handling and logging for session synchronization and window mode transitions

apps/desktop-client/src/renderer/App.vue

@@ -30,7 +30,14 @@ function getModeBridge(): WindowModeBridge | undefined {
 }
 
 function syncWindowMode(authenticated: boolean): void {
-  void getModeBridge()?.setWindowMode?.(authenticated ? 'main' : 'login', { source: 'auth-state' })
+  void getModeBridge()
+    ?.setWindowMode?.(authenticated ? 'main' : 'login', { source: 'auth-state' })
+    .catch((err) => {
+      console.warn('[desktop-app] window mode sync failed', {
+        authenticated,
+        message: err instanceof Error ? err.message : String(err),
+      })
+    })
 }
 
 const rendererWindowMode = resolveRendererWindowMode()
@@ -62,7 +69,11 @@ if (rendererWindowMode === 'main') {
 
 onMounted(() => {
   if (rendererWindowMode !== 'login') {
-    void syncRuntimeSession()
+    void syncRuntimeSession().catch((err) => {
+      console.warn('[desktop-app] runtime session sync failed', {
+        message: err instanceof Error ? err.message : String(err),
+      })
+    })
   }
   if (usesAutomaticWindowMode) {
     syncWindowMode(isAuthenticated.value)

apps/desktop-client/src/renderer/composables/useDesktopSession.ts

@@ -55,6 +55,13 @@ let logoutPromise: Promise<void> | null = null
 let renewPromise: Promise<void> | null = null
 let tokenRenewTimer: ReturnType<typeof setInterval> | null = null
 
+function logRuntimeSessionSyncFailure(reason: string, err: unknown): void {
+  console.warn('[desktop-session] runtime session sync failed', {
+    reason,
+    message: err instanceof Error ? err.message : String(err),
+  })
+}
+
 function readStoredSession(): DesktopSession | null {
   if (typeof window === 'undefined') {
     return null
@@ -117,7 +124,9 @@ function persistSession(next: DesktopSession | null): void {
     window.localStorage.setItem(sessionStorageKey, JSON.stringify(next))
   }
 
-  void syncRuntimeSessionToMain(next)
+  void syncRuntimeSessionToMain(next).catch((err) => {
+    logRuntimeSessionSyncFailure('persist-session', err)
+  })
 }
 
 function readStoredApiBaseURL(): string {
@@ -141,7 +150,9 @@ function persistApiBaseURL(value: string): void {
     window.localStorage.setItem(apiBaseURLStorageKey, normalized)
   }
 
-  void syncRuntimeSessionToMain()
+  void syncRuntimeSessionToMain().catch((err) => {
+    logRuntimeSessionSyncFailure('api-base-url-change', err)
+  })
 }
 
 function createPublicClient() {
@@ -753,7 +764,9 @@ if (typeof window !== 'undefined') {
   window.addEventListener('storage', (event) => {
     if (event.key === apiBaseURLStorageKey) {
       apiBaseURL.value = normalizeDesktopApiBaseURL(event.newValue, normalizedDefaultApiBaseURL)
-      void syncRuntimeSessionToMain()
+      void syncRuntimeSessionToMain().catch((err) => {
+        logRuntimeSessionSyncFailure('storage-api-base-url-change', err)
+      })
     }
   })
   void syncStoredDesktopClientDeviceInfo()

apps/desktop-client/src/renderer/views/LoginView.vue

@@ -62,7 +62,13 @@ async function submitLogin() {
     password: form.password,
   })
   await persistCredentialsPreference()
-  await window.desktopBridge?.app?.setWindowMode?.('main', { source: 'login' })
+  try {
+    await window.desktopBridge?.app?.setWindowMode?.('main', { source: 'login' })
+  } catch (err) {
+    console.warn('[login-view] switch to main window failed', {
+      message: err instanceof Error ? err.message : String(err),
+    })
+  }
 }
 
 async function hydrateSavedCredentials() {