style: 样式优化

frontend/src/lib/i18n/en-US.ts

@@ -89,6 +89,42 @@ export const enUS: TranslationMap = {
   "sidebar.messages": " messages",
   "sidebar.rename": "Rename",
   "sidebar.delete": "Delete",
+  "sidebar.search": "Search conversations...",
+  "sidebar.today": "Today",
+  "sidebar.yesterday": "Yesterday",
+  "sidebar.earlier": "Earlier",
+  "sidebar.pinned": "Pinned",
+  "sidebar.video": "Video",
+  "sidebar.clearHistory": "Clear History",
+
+  // Scene cards (empty state)
+  "scene.describe": "Describe my surroundings",
+  "scene.describe.desc": "Let AI observe and describe the current scene",
+  "scene.text": "Recognize text in view",
+  "scene.text.desc": "Extract and translate text from the scene",
+  "scene.object": "Analyze this object",
+  "scene.object.desc": "Identify objects and provide information",
+  "scene.suggest": "Give me suggestions",
+  "scene.suggest.desc": "Practical suggestions based on the current scene",
+
+  // Video controls (enhanced)
+  "controls.recognize": "Analyze Scene",
+  "controls.device.camera": "Camera",
+  "controls.device.mic": "Microphone",
+  "controls.device.default": "Default",
+  "controls.mode.realtime": "Realtime",
+  "controls.mode.ondemand": "On-demand",
+  "controls.mode.chat": "Chat only",
+
+  // Status bar
+  "statusbar.ready": "Ready · Select devices to start",
+  "statusbar.calling": "In call",
+  "statusbar.duration": "Duration",
+  "statusbar.recognitions": "recognitions",
+  "statusbar.tokens": "Tokens",
+
+  // Input enhanced
+  "chat.input.voice": "Voice input",
 
   // Device errors
   "error.vadInit": "VAD initialization failed",