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/living-map-service/adapters/space_client.py

@@ -0,0 +1,34 @@
+"""
+Space Service Client Adapter
+Phase 9: Living Map
+"""
+from typing import Dict, Any
+from .base_client import BaseServiceClient
+import os
+
+class SpaceClient(BaseServiceClient):
+    """Client for space-service"""
+    
+    def __init__(self):
+        base_url = os.getenv("SPACE_SERVICE_URL", "http://localhost:7002")
+        super().__init__(base_url)
+    
+    async def get_space_scene(self) -> Dict[str, Any]:
+        """Get space scene data"""
+        result = await self.get_with_fallback("/api/space/scene", fallback={})
+        return result
+    
+    async def get_layer_data(self) -> Dict[str, Any]:
+        """Get space layer data for Living Map"""
+        scene = await self.get_space_scene()
+        
+        # Extract planets and nodes from scene
+        # Format depends on space-service implementation
+        planets = scene.get("planets", [])
+        nodes = scene.get("nodes", [])
+        
+        return {
+            "planets": planets,
+            "nodes": nodes
+        }
+