feat: Add presence heartbeat for Matrix online status

- matrix-gateway: POST /internal/matrix/presence/online endpoint
- usePresenceHeartbeat hook with activity tracking
- Auto away after 5 min inactivity
- Offline on page close/visibility change
- Integrated in MatrixChatRoom component

services/secondme-service/routes.py

@@ -0,0 +1,98 @@
+"""
+Second Me Service API Routes
+"""
+
+from fastapi import APIRouter, HTTPException, Depends
+from typing import List
+import logging
+
+from models import (
+    SecondMeInvokePayload,
+    SecondMeInvokeResponse,
+    SecondMeProfile
+)
+import service
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/secondme", tags=["secondme"])
+
+
+# =============================================================================
+# Second Me API
+# =============================================================================
+
+@router.post("/invoke", response_model=SecondMeInvokeResponse)
+async def invoke_secondme(payload: SecondMeInvokePayload):
+    """
+    Викликати Second Me agent
+    """
+    try:
+        # TODO: витягнути user_id з JWT
+        user_id = "u_mock_user"  # Mock для MVP
+        
+        result = await service.invoke_second_me(user_id, payload.prompt)
+        
+        # Додати історію
+        history = await service.get_user_history(user_id, limit=10)
+        
+        return {
+            **result,
+            "history": history
+        }
+    
+    except Exception as e:
+        logger.error(f"Failed to invoke SecondMe: {e}")
+        raise HTTPException(status_code=500, detail="Failed to invoke SecondMe")
+
+
+@router.get("/history")
+async def get_secondme_history(limit: int = 5):
+    """
+    Отримати історію розмов з Second Me
+    """
+    try:
+        # TODO: витягнути user_id з JWT
+        user_id = "u_mock_user"  # Mock для MVP
+        
+        history = await service.get_user_history(user_id, limit=limit)
+        return history
+    
+    except Exception as e:
+        logger.error(f"Failed to get SecondMe history: {e}")
+        raise HTTPException(status_code=500, detail="Failed to get history")
+
+
+@router.get("/profile", response_model=SecondMeProfile)
+async def get_secondme_profile():
+    """
+    Отримати профіль Second Me користувача
+    """
+    try:
+        # TODO: витягнути user_id з JWT
+        user_id = "u_mock_user"  # Mock для MVP
+        
+        profile = await service.get_user_profile(user_id)
+        return profile
+    
+    except Exception as e:
+        logger.error(f"Failed to get SecondMe profile: {e}")
+        raise HTTPException(status_code=500, detail="Failed to get profile")
+
+
+@router.post("/history/clear")
+async def clear_secondme_history():
+    """
+    Очистити історію розмов з Second Me
+    """
+    try:
+        # TODO: витягнути user_id з JWT
+        user_id = "u_mock_user"  # Mock для MVP
+        
+        await service.clear_user_history(user_id)
+        return {"status": "cleared"}
+    
+    except Exception as e:
+        logger.error(f"Failed to clear SecondMe history: {e}")
+        raise HTTPException(status_code=500, detail="Failed to clear history")
+