v0.17.2: auto-fact detection with conflict-alert flow

- auto_detect_facts() scans chat turns for factual content (IPs, paths,
  services, config changes, hardware refs) using pattern matching
- check_fact_conflicts() cross-references detected facts against stored
  FTS5 memories — when a contradiction exists (same topic, diff value)
  the system surfaces a rag_update_suggestion in the done SSE payload
- Frontend shows a floating notification banner comparing old vs new
  fact with Update/Dismiss buttons
- confirm_fact_update() replaces the memory + re-embeds/re-indexes
  the Qdraft entry on user confirmation
- Silent auto-ingest (memories + Qdrant) when no conflict exists
- Frontend: msg-toolbar opacity 0→0.35 for visibility

routers/memories.py

@@ -4,6 +4,7 @@ from typing import Optional
 
 from db import get_db
 from memory import add_memory, delete_memory, update_memory, get_all_memories, search_memories
+from rag import confirm_fact_update
 from security import read_json_body, BODY_LIMIT_DEFAULT_BYTES
 from config import MAX_MEMORY_FACT_CHARS
 
@@ -54,6 +55,22 @@ async def search_memories_api(q: str, limit: int = 10):
     return {"results": results, "count": len(results)}
 
 
+@router.post("/api/memories/confirm-update")
+async def confirm_memory_update(request: Request):
+    body = await read_json_body(request, BODY_LIMIT_DEFAULT_BYTES)
+    memory_id = body.get("memory_id")
+    new_fact = str(body.get("new_fact", "")).strip()
+    old_fact = str(body.get("old_fact", "")).strip()
+    user_message = str(body.get("user_message", "")).strip()
+    assistant_message = str(body.get("assistant_message", "")).strip()
+    if not memory_id or not new_fact:
+        raise HTTPException(status_code=400, detail="memory_id and new_fact are required")
+    ok = await confirm_fact_update(memory_id, old_fact, new_fact, user_message, assistant_message)
+    if not ok:
+        raise HTTPException(status_code=404, detail="Memory not found")
+    return {"status": "ok"}
+
+
 @router.get("/api/memories/stats")
 async def memory_stats():
     db = get_db()