feat: add runtime listen-only switch and API controls

qingjian_cs/app/http_api.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 from flask import Flask, jsonify, request
 
 from .logger import setup_logger
+from .runtime_switch import is_listen_only, set_listen_only
 from .task_manager import TaskManager
 
 
@@ -15,6 +16,20 @@ def create_http_app(task_manager: TaskManager | None = None) -> Flask:
     def health():
         return jsonify({'ok': True})
 
+    @app.get('/api/runtime/listen_only')
+    def get_listen_only():
+        return jsonify({'ok': True, 'listen_only': is_listen_only()})
+
+    @app.post('/api/runtime/listen_only')
+    def set_listen_only_mode():
+        body = request.get_json(silent=True) or {}
+        if "enabled" not in body:
+            return jsonify({'ok': False, 'error': 'enabled required'}), 400
+        enabled = bool(body.get("enabled"))
+        current = set_listen_only(enabled)
+        logger.info('[运行时] listen_only=%s', current)
+        return jsonify({'ok': True, 'listen_only': current})
+
     @app.post('/api/task/receive')
     def receive_task():
         payload = request.get_json(silent=True) or {}