feat: API routes — speakers, rooms, search, RAG

Full implementations replacing stubs: speakers CRUD with utterance count,
rooms list + mute/unmute via pipeline, FTS5-based search, RAG /ask and
/summary endpoints. 15 route tests (8 new) all passing; 35 total.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/api/routes/rooms.py

@@ -1,6 +1,36 @@
-from fastapi import APIRouter
+import sqlite3
+import httpx
+from fastapi import APIRouter, HTTPException
+from app.shared.config import Settings
 
 
-def make_router(settings, db_factory):
+def make_router(settings: Settings, db_factory):
     router = APIRouter(prefix="/api/rooms")
+
+    @router.get("")
+    def list_rooms():
+        db: sqlite3.Connection = db_factory()
+        rows = db.execute(
+            "SELECT id, name, device_label, is_active, last_seen, created_at FROM rooms ORDER BY name"
+        ).fetchall()
+        return [dict(r) for r in rows]
+
+    @router.post("/{room_id}/mute")
+    def mute_room(room_id: int):
+        db: sqlite3.Connection = db_factory()
+        row = db.execute("SELECT name FROM rooms WHERE id=?", (room_id,)).fetchone()
+        if not row:
+            raise HTTPException(404, "Room not found")
+        httpx.post(f"{settings.pipeline_internal_url}/internal/rooms/{row['name']}/mute")
+        return {"ok": True, "room": row["name"]}
+
+    @router.post("/{room_id}/unmute")
+    def unmute_room(room_id: int):
+        db: sqlite3.Connection = db_factory()
+        row = db.execute("SELECT name FROM rooms WHERE id=?", (room_id,)).fetchone()
+        if not row:
+            raise HTTPException(404, "Room not found")
+        httpx.post(f"{settings.pipeline_internal_url}/internal/rooms/{row['name']}/unmute")
+        return {"ok": True, "room": row["name"]}
+
     return router