Keep remote browsing on atlas command path

Only auto-inject the hidden atlas bridge when remote browsing is configured,
include thread ids in browser session notifications, and persist Atlas browser
state plus image artifacts so replay items can be rebuilt from history.

Co-authored-by: Codex <noreply@openai.com>

codex-rs/app-server-protocol/schema/json/v2/BrowserSessionUpdatedNotification.json

@@ -92,6 +92,12 @@
     },
     "browserState": {
       "$ref": "#/definitions/BrowserSessionState"
+    },
+    "threadId": {
+      "type": [
+        "string",
+        "null"
+      ]
     }
   },
   "required": [
@@ -100,4 +106,4 @@
   ],
   "title": "BrowserSessionUpdatedNotification",
   "type": "object"
-}
+}