refactor: remove manual refresh and search controls

backend/mvp.py

@@ -144,7 +144,6 @@ def _memo_excerpt(content: str) -> str:
 @router.get("/memos")
 async def list_memos(
     scope: str = Query("active", pattern="^(active|trash)$"),
-    q: str = "",
     page: int = Query(1, ge=1),
     page_size: int = Query(50, ge=1, le=100),
     user: User = Depends(current_user),
@@ -152,10 +151,6 @@ async def list_memos(
 ):
     filters = [Memo.user_id == user.id]
     filters.append(Memo.deleted_at.is_(None) if scope == "active" else Memo.deleted_at.is_not(None))
-    query = q.strip()
-    if query:
-        pattern = f"%{query}%"
-        filters.append((Memo.title.ilike(pattern)) | (Memo.content.ilike(pattern)))
     total = await db.scalar(select(func.count()).select_from(Memo).where(*filters))
     rows = (await db.scalars(
         select(Memo).where(*filters).order_by(Memo.updated_at.desc(), Memo.id.desc())