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/agent-runtime/memory_client.py

@@ -0,0 +1,86 @@
+import httpx
+import os
+from typing import List, Dict, Any
+
+AGENT_MEMORY_URL = os.getenv("AGENT_MEMORY_URL", "http://agent-memory:7008")
+
+async def query_memory(
+    agent_id: str,
+    microdao_id: str,
+    query: str,
+    k: int = 5
+) -> List[Dict[str, Any]]:
+    """
+    Query agent memory for relevant context
+    
+    Returns list of memory fragments relevant to the query
+    Falls back to empty list if Agent Memory service is not available
+    """
+    try:
+        async with httpx.AsyncClient(timeout=10.0) as client:
+            response = await client.post(
+                f"{AGENT_MEMORY_URL}/internal/agent-memory/query",
+                headers={
+                    "X-Internal-Secret": os.getenv("MEMORY_ORCHESTRATOR_SECRET", "dev-secret-token"),
+                    "Content-Type": "application/json"
+                },
+                json={
+                    "agent_id": agent_id,
+                    "microdao_id": microdao_id,
+                    "query": query,
+                    "limit": k
+                }
+            )
+            response.raise_for_status()
+            data = response.json()
+            results = data.get("results", [])
+            print(f"✅ Retrieved {len(results)} memory fragments")
+            return results
+    except httpx.ConnectError:
+        print(f"⚠️ Agent Memory service not available (Phase 2 - OK)")
+        return []
+    except httpx.HTTPStatusError as e:
+        print(f"⚠️ Agent Memory HTTP error: {e.response.status_code}")
+        return []
+    except Exception as e:
+        print(f"⚠️ Agent Memory error: {e}")
+        return []
+
+async def store_memory(
+    agent_id: str,
+    microdao_id: str,
+    channel_id: str,
+    content: Dict[str, Any]
+) -> bool:
+    """
+    Store interaction in agent memory
+    
+    Returns True if successful, False otherwise
+    Optional in Phase 2 - memory writeback
+    """
+    try:
+        async with httpx.AsyncClient(timeout=10.0) as client:
+            response = await client.post(
+                f"{AGENT_MEMORY_URL}/internal/agent-memory/store",
+                headers={
+                    "X-Internal-Secret": os.getenv("MEMORY_ORCHESTRATOR_SECRET", "dev-secret-token"),
+                    "Content-Type": "application/json"
+                },
+                json={
+                    "agent_id": agent_id,
+                    "microdao_id": microdao_id,
+                    "channel_id": channel_id,
+                    "kind": "conversation",
+                    "content": content
+                }
+            )
+            response.raise_for_status()
+            print(f"✅ Stored memory for {agent_id}")
+            return True
+    except httpx.ConnectError:
+        print(f"⚠️ Agent Memory service not available (Phase 2 - OK)")
+        return False
+    except Exception as e:
+        print(f"⚠️ Error storing memory: {e}")
+        return False
+