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/models.py

@@ -0,0 +1,37 @@
+from pydantic import BaseModel
+from typing import Literal, Optional, Dict, Any
+from datetime import datetime
+
+class AgentInvocation(BaseModel):
+    agent_id: str
+    entrypoint: Literal["channel_message", "direct", "cron"] = "channel_message"
+    payload: Dict[str, Any]
+
+class AgentBlueprint(BaseModel):
+    id: str
+    name: str
+    model: str
+    instructions: str
+    capabilities: Dict[str, Any] = {}
+    tools: list[str] = []
+
+class ChannelMessage(BaseModel):
+    sender_id: str
+    sender_type: Literal["human", "agent"]
+    content: str
+    created_at: datetime
+
+class LLMRequest(BaseModel):
+    model: str
+    messages: list[Dict[str, str]]
+    max_tokens: int = 1000
+    temperature: float = 0.7
+
+class LLMResponse(BaseModel):
+    content: str
+    model: str
+    usage: Optional[Dict[str, int]] = None
+
+
+
+