feat: add bsk record for semantic user-action traces

Capture user actions in the Agent Window and export a record-only
trace (pages[] + navigate/click/fill/select/press steps with target
descriptors). Adds the record overlay UI aligned with the control
overlay, and wires record start/stop/await through CLI, daemon,
protocol, and extension.

packages/i18n/src/locales/en-US/extension.json

@@ -68,5 +68,9 @@
     "expand": "Expand",
     "dragHandle": "Drag to move",
     "notificationTitle": "BrowserSkill: Agent needs your help"
+  },
+  "recordOverlay": {
+    "recording": "Recording your actions",
+    "finish": "Finish"
   }
 }

packages/i18n/src/locales/zh-CN/extension.json

@@ -68,5 +68,9 @@
     "expand": "展开",
     "dragHandle": "拖动以移动",
     "notificationTitle": "BrowserSkill：Agent 需要你的帮助"
+  },
+  "recordOverlay": {
+    "recording": "正在录制用户操作",
+    "finish": "结束"
   }
 }