feat(agent): add frontend action bridge

.opencode/tools/zoom_to_map.ts

@@ -1,4 +1,5 @@
 import { tool } from "@opencode-ai/plugin";
+import { executeFrontendAction } from "./frontend_action.js";
 
 export default tool({
   description:
@@ -26,7 +27,7 @@ export default tool({
       .optional()
       .describe("Optional animation duration in milliseconds. Defaults to 1000."),
   },
-  async execute() {
-    return "已缩放到指定地图坐标。";
+  async execute(args, context) {
+    return executeFrontendAction("zoom_to_map", args, context);
   },
 });