feat: integrate Tauri v2 with Android widget and voice assistant

- Add Tauri v2 shell (Cargo, tauri.conf.json, capabilities, plugins)
- Migrate all fetch() calls to apiFetch() for Tauri-aware HTTP
- Migrate WebSocket endpoints to resolveEndpoints() for dynamic URLs
- Add ServerConfigDialog for remote server URL configuration
- Add tauri.ts lib with isTauri detection, apiFetch wrapper, plugin helpers
- Add server-config Pinia store with persistence via plugin-store
- Conditional PWA (disabled in Tauri builds)
- Android: home screen transcript widget (last 5 messages, 30s refresh)
- Android: voice command / share activity (SpeechRecognizer + WebSocket)
- Android: signed release APK with auto-copy to installers/
- Remove stale frontend/src-tauri directory

frontend/src/App.vue

@@ -10,19 +10,27 @@ import FloatingTranscriptDebug from './components/FloatingTranscriptDebug.vue'
 import TerminalFabStack from './components/transcript-debug/TerminalFabStack.vue'
 import PwaInstallBanner from './components/PwaInstallBanner.vue'
 import HooksApprovalModal from './components/HooksApprovalModal.vue'
+import ServerConfigDialog from './components/ServerConfigDialog.vue'
 import { useGlobalApproval } from './composables/useGlobalApproval'
 import { initWebMCP, getWebMCP } from './services/webmcp'
 import { initTorch, destroyTorch } from './services/torch'
 import { initSessionStateWS, destroySessionStateWS } from './services/session-state-ws'
-import { endpoints } from './config/endpoints'
 import { initToolRegistry, activatePageTools, initToolsOnRefresh } from './services/toolRegistry'
 import { setResponseControls } from './services/tools/handlers/responseHandlers'
 import { useCanvasStore } from './stores/canvas'
 import { useProjectCanvasStore } from './stores/projectCanvas'
 import { useSessionState } from './stores/session-state'
+import { isTauri } from './lib/tauri'
+import { useServerConfig } from './stores/server-config'
 
 const route = useRoute()
 const router = useRouter()
+
+// Tauri server config
+const serverConfig = isTauri ? useServerConfig() : null
+const showServerConfig = ref(false)
+const needsServerConfig = computed(() => isTauri && serverConfig && !serverConfig.isConfigured)
+
 const showVoice = ref(false)
 const showTranscriptDebug = ref(false)
 const showDebugConsole = ref(false)
@@ -293,6 +301,20 @@ watch(() => route.name, (newPage) => {
     activatePageTools(newPage as PageName)
   }
 })
+
+// Watch for Tauri server config changes — re-init services when server is configured
+if (serverConfig) {
+  watch(() => serverConfig!.isConfigured, async (configured) => {
+    if (configured) {
+      showServerConfig.value = false
+      // Re-initialize all services with the new server URL
+      initSessionStateWS()
+      initWhisperSocket()
+      await initWebMCP()
+      await initTorch()
+    }
+  })
+}
 </script>
 
 <template>
@@ -325,7 +347,12 @@ watch(() => route.name, (newPage) => {
           </svg>
           <span v-if="debugLogs.length" class="log-count">{{ debugLogs.length }}</span>
         </button>
-        <PwaInstallBanner />
+        <PwaInstallBanner v-if="!isTauri" />
+        <button v-if="isTauri" class="server-config-btn" @click="showServerConfig = true" title="Server settings">
+          <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+            <rect x="2" y="2" width="20" height="8" rx="2" ry="2"/><rect x="2" y="14" width="20" height="8" rx="2" ry="2"/><line x1="6" y1="6" x2="6.01" y2="6"/><line x1="6" y1="18" x2="6.01" y2="18"/>
+          </svg>
+        </button>
       </div>
       <div class="header-right">
         <button
@@ -427,6 +454,9 @@ watch(() => route.name, (newPage) => {
     <!-- Global Hooks Approval Modal -->
     <HooksApprovalModal />
 
+    <!-- Tauri Server Config Dialog -->
+    <ServerConfigDialog v-if="needsServerConfig || showServerConfig" />
+
     <!-- Debug Console Panel -->
     <Teleport to="body">
       <Transition name="debug-slide">
@@ -1031,6 +1061,28 @@ watch(() => route.name, (newPage) => {
   }
 }
 
+/* Server Config Button (Tauri) */
+.server-config-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 28px;
+  height: 28px;
+  padding: 0;
+  background: transparent;
+  border: 1px solid var(--border-color);
+  border-radius: 5px;
+  color: var(--text-secondary);
+  cursor: pointer;
+  transition: all 0.15s ease;
+}
+
+.server-config-btn:hover {
+  background: var(--bg-hover);
+  color: var(--accent, #6366f1);
+  border-color: var(--accent, #6366f1);
+}
+
 /* Debug Console Button */
 .debug-btn {
   display: flex;