feat: Agent Chat API backend - profiles, send, history

- GET /api/agents - list known profiles with online/offline status
- POST /api/agents/{profile}/send - send message via Hermes CLI subprocess
- GET /api/agents/{profile}/history - retrieve conversation history
- SQLite conversation store at ~/.hermes/kanban/boards/hermes-command-center/conversations.db
- Response cleanup to strip Hermes CLI wrapper formatting
- Auth-gated via existing Basic Auth middleware

server.py

@@ -143,6 +143,42 @@ def _get_conversation_history(profile: str, limit: int = 50) -> list[dict]:
         conn.close()
 
 
+def _clean_agent_response(text: str) -> str:
+    """Extract just the agent's reply from Hermes CLI wrapper output."""
+    lines = text.splitlines()
+    result_lines = []
+    in_box = False
+    for line in lines:
+        stripped = line.strip()
+        if stripped.startswith("Query:") or stripped.startswith("Initializing"):
+            continue
+        if stripped.startswith("╭─"):
+            in_box = True
+            continue
+        if stripped.startswith("╰─"):
+            in_box = False
+            continue
+        if in_box:
+            result_lines.append(stripped)
+        if stripped.startswith("Resume this session") \
+                or stripped.startswith("Session:") \
+                or stripped.startswith("Duration:") \
+                or stripped.startswith("Messages:"):
+            break
+    cleaned = "\n".join(result_lines).strip()
+    if cleaned:
+        return cleaned
+    if "╰─" in text:
+        parts = text.split("╰─")
+        before = parts[0]
+        if "╭─" in before:
+            for line in before.split("╭─", 1)[1].splitlines():
+                s = line.strip()
+                if s:
+                    return s
+    return ""
+
+
 _init_conversations_db()
 
 app = FastAPI(title="Hermes Command Center")
@@ -729,6 +765,11 @@ async def agent_send(profile: str, request: Request):
         if not response_text:
             response_text = "(no response)"
 
+        # Clean up CLI wrapper text — extract the actual agent response
+        cleaned = _clean_agent_response(response_text)
+        if cleaned:
+            response_text = cleaned
+
         # Save agent response
         _save_message(profile, "agent", response_text)