feat(cdp): Phase 2 - real-time UI mirroring via screencast + remote input

server/index.js

@@ -43,6 +43,9 @@ wss.on('connection', (ws) => {
         const state = wsClients.get(ws);
         if (state?.activeSessionId) {
             stopSessionPolling(state.activeSessionId);
+            // 스크린캠스트도 중지
+            const session = sessionManager.getSession(state.activeSessionId);
+            if (session) session.client.stopScreencast();
         }
         wsClients.delete(ws);
         console.log('[WS] 클라이언트 연결 해제');
@@ -126,6 +129,56 @@ async function handleWsMessage(ws, msg) {
             break;
         }
 
+        // ─── Phase 2: Screencast & Remote Input ────────────
+
+        case 'start_screencast': {
+            const session = sessionManager.getSession(msg.sessionId || state.activeSessionId);
+            if (!session) {
+                ws.send(JSON.stringify({ type: 'error', message: '활성 세션 없음' }));
+                return;
+            }
+
+            // 스크린캠스트 프레임 콜백 등록
+            session.client.onScreencastFrame = (frame) => {
+                if (ws.readyState === WebSocket.OPEN) {
+                    ws.send(JSON.stringify({
+                        type: 'screencast_frame',
+                        sessionId: session.id,
+                        data: frame.data,
+                        metadata: frame.metadata,
+                    }));
+                }
+            };
+
+            const ok = await session.client.startScreencast(msg.options || {});
+            ws.send(JSON.stringify({
+                type: 'screencast_started',
+                sessionId: session.id,
+                success: ok,
+            }));
+            break;
+        }
+
+        case 'stop_screencast': {
+            const session = sessionManager.getSession(msg.sessionId || state.activeSessionId);
+            if (session) {
+                await session.client.stopScreencast();
+            }
+            ws.send(JSON.stringify({
+                type: 'screencast_stopped',
+                sessionId: msg.sessionId || state.activeSessionId,
+            }));
+            break;
+        }
+
+        case 'input_event': {
+            const session = sessionManager.getSession(msg.sessionId || state.activeSessionId);
+            if (session) {
+                await session.client.dispatchInput(msg.event);
+            }
+            break;
+        }
+
         default:
             ws.send(JSON.stringify({ type: 'error', message: `알 수 없는 메시지 타입: ${msg.type}` }));
     }