feat(agents): implement Code Commander module (Phases 1-5)

- Phase 1: Infrastructure (state, prompts, registry)
- Phase 2: Execution engine (AI adapters, security classifier, executors)
- Phase 3: Agent integration (graph nodes, routing)
- Phase 4: Streaming interaction (PTY terminal, WebSocket)
- Phase 5: Frontend integration (Vue components)

backend/app/agents/tools/interactive_input.py

@@ -0,0 +1,58 @@
+"""
+InteractiveInputHandler - 交互输入处理
+"""
+
+import asyncio
+from typing import Any
+
+from app.agents.tools.terminal_engine import PTYManager
+
+
+class InteractiveInputHandler:
+    """交互输入处理器"""
+
+    def __init__(self, pty_manager: PTYManager):
+        self.pty_manager = pty_manager
+        self._pending_inputs: dict[str, asyncio.Event] = {}
+        self._input_cache: dict[str, str] = {}
+
+    async def wait_for_input(self, session_id: str, prompt: str) -> str:
+        """等待用户输入（如 "y" 确认）"""
+        event = asyncio.Event()
+        self._pending_inputs[session_id] = event
+
+        # 发送提示
+        from app.routers.terminal import manager
+
+        try:
+            await manager.send(session_id, f"\n{prompt}\n")
+        except Exception:
+            pass
+
+        # 等待输入完成
+        try:
+            await asyncio.wait_for(event.wait(), timeout=60.0)
+        except asyncio.TimeoutError:
+            del self._pending_inputs[session_id]
+            return self._input_cache.get(session_id, "")
+
+        del self._pending_inputs[session_id]
+
+        return self._input_cache.get(session_id, "")
+
+    async def send_input(self, session_id: str, data: str):
+        """用户发送输入"""
+        self._input_cache[session_id] = data
+        if session_id in self._pending_inputs:
+            self._pending_inputs[session_id].set()
+
+        # 同时写入 PTY
+        await self.pty_manager.write(session_id, data + "\n")
+
+    def clear_input(self, session_id: str):
+        """清除输入缓存"""
+        if session_id in self._input_cache:
+            del self._input_cache[session_id]
+        if session_id in self._pending_inputs:
+            self._pending_inputs[session_id].set()  # 取消等待
+            del self._pending_inputs[session_id]