feat: voice assistant integration, PiP window fixes, widget improvements and pixel art scrollbar

- Android voice assistant: RecognitionService, VoiceInteractionSession with startAssistantActivity, es-HN speech recognition
- Voice transcript sent to first alive terminal via WebSocket, opens FloatingTranscriptDebug on correct session
- PiP window: fix close button using getCurrentWebviewWindow(), add mini/restore toggle, remove alwaysOnTop
- Add webview-close and window-destroy permissions to capabilities
- Pixel art ocean scrollbar on /transcript-debug respecting scroll nav mode settings
- Widget improvements: terminal list service, input widget provider, updated layouts

frontend/src/App.vue

@@ -32,6 +32,7 @@ const serverConfig = isTauri ? useServerConfig() : null
 const showServerConfig = ref(false)
 const needsServerConfig = computed(() => isTauri && serverConfig && !serverConfig.isConfigured)
 
+const isPipWindow = computed(() => route.query.pip === '1')
 const showVoice = ref(false)
 const showTranscriptDebug = ref(false)
 const showDebugConsole = ref(false)
@@ -229,23 +230,16 @@ onMounted(async () => {
     return true
   }
 
-  // Bridge for Android voice assistant — opens FloatingTranscriptDebug on the target terminal
+  // Bridge for Android voice assistant — navigates to transcript-debug page on the target terminal
   ;(window as any).__VOICE_OPEN_TERMINAL__ = (ephemeralSessionId: string) => {
     const entry = sessionState.terminalRegistry.find(
       t => t.ephemeralSessionId === ephemeralSessionId
     )
-    if (entry && transcriptDebugRef.value) {
-      transcriptDebugRef.value.switchToTerminal(entry.transcriptSessionId)
-      showTranscriptDebug.value = true
-      return true
-    }
-    // Fallback: open on first terminal
-    if (sessionState.terminalRegistry.length && transcriptDebugRef.value) {
-      transcriptDebugRef.value.switchToTerminal(sessionState.terminalRegistry[0].transcriptSessionId)
-      showTranscriptDebug.value = true
-      return true
-    }
-    return false
+    const idx = entry
+      ? sessionState.terminalRegistry.indexOf(entry) + 1
+      : 1
+    router.push(`/transcript-debug/${idx}`)
+    return true
   }
 
   // Sync Windows titlebar color with CSS variable
@@ -372,8 +366,8 @@ if (serverConfig) {
 </script>
 
 <template>
-  <div class="app-container" :class="{ wco: forceWco }">
-    <header class="app-header" :class="{ 'wco-header': forceWco }">
+  <div class="app-container" :class="{ wco: forceWco, 'pip-window': isPipWindow }">
+    <header v-if="!isPipWindow" class="app-header" :class="{ 'wco-header': forceWco }">
       <div class="header-left">
         <button
           class="toolbar-toggle"
@@ -439,7 +433,7 @@ if (serverConfig) {
       </div>
     </header>
     <main class="app-main">
-      <Toolbar :collapsed="!toolbarVisible" />
+      <Toolbar v-if="!isPipWindow" :collapsed="!toolbarVisible" />
       <RouterView v-slot="{ Component }">
         <Transition name="page" mode="out-in">
           <component :is="Component" />
@@ -447,8 +441,8 @@ if (serverConfig) {
       </RouterView>
     </main>
 
-    <!-- Transcript Debug FAB Button (pixel art ocean) -->
-    <div class="transcript-fab-wrap" :class="{ 'sheet-open': showVoice || showTranscriptDebug, 'keyboard-visible': keyboardVisible }" @contextmenu.prevent>
+    <!-- Transcript Debug FAB Button (pixel art ocean) — hidden in PiP -->
+    <div v-if="!isPipWindow" class="transcript-fab-wrap" :class="{ 'sheet-open': showVoice || showTranscriptDebug, 'keyboard-visible': keyboardVisible }" @contextmenu.prevent>
       <TerminalFabStack
         :terminals="extraTerminals"
         :active-session-id="transcriptDebugRef?.activeTerminalSessionId ?? null"
@@ -559,6 +553,16 @@ if (serverConfig) {
   background: var(--bg-primary);
 }
 
+/* PiP window: no header, no chrome, full bleed */
+.app-container.pip-window {
+  border-radius: 8px;
+  overflow: hidden;
+}
+
+.app-container.pip-window .app-main {
+  border-radius: 8px;
+}
+
 .app-header {
   display: flex;
   align-items: center;