diff --git a/src/easy_tdx/commands/security_quotes.py b/src/easy_tdx/commands/security_quotes.py
index 1bf8fa4..b2c00eb 100644
--- a/src/easy_tdx/commands/security_quotes.py
+++ b/src/easy_tdx/commands/security_quotes.py
@@ -201,7 +201,8 @@ class GetSecurityQuotesCmd(BaseCommand[list[SecurityQuote]]):
                 raise TdxDecodeError(f"security_quotes 非法 market 值: {market_b}") from e
 
             code = code_b.decode("utf-8").rstrip("\x00")
-            # 价格按品种有效小数位解析：股票/大盘指数 ÷100，ETF/基金/债券/880 统计指数 ÷1000（Issue #8）
+            # 价格按品种有效小数位解析：股票/大盘指数 ÷100；
+            # ETF/基金/债券/880 统计指数 ÷1000（Issue #8）
             divisor = 10 ** _price_decimal_digits(market, code)
             p = price_raw / divisor
 
diff --git a/src/easy_tdx/web/app.py b/src/easy_tdx/web/app.py
index 5aed2fc..0a8525b 100644
--- a/src/easy_tdx/web/app.py
+++ b/src/easy_tdx/web/app.py
@@ -88,7 +88,7 @@ async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
 
         store = get_watchlist_store()
 
-        async def _watch_symbols():
+        async def _watch_symbols() -> list[tuple[Market, str]]:
             # SQLite 存 "SH"/"SZ"/"BJ" 字符串，轮询器需要 Market 枚举
             return [(Market[mkt], code) for mkt, code in store.symbols()]
 
@@ -132,10 +132,10 @@ async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
     yield
 
     # --- 关闭实时行情推送器 ---
-    streamer = getattr(app.state, "quote_streamer", None)
-    if streamer is not None:
+    streamer_svc = getattr(app.state, "quote_streamer", None)
+    if streamer_svc is not None:
         try:
-            await streamer.stop()
+            await streamer_svc.stop()
         except Exception:
             logger.warning("QuoteStreamer stop failed", exc_info=True)
 
diff --git a/src/easy_tdx/web/quote_streamer.py b/src/easy_tdx/web/quote_streamer.py
index d2f887b..a960712 100644
--- a/src/easy_tdx/web/quote_streamer.py
+++ b/src/easy_tdx/web/quote_streamer.py
@@ -19,7 +19,8 @@ import asyncio
 import itertools
 import logging
 from collections.abc import Awaitable, Callable
-from datetime import datetime, timedelta, timezone as dt_timezone
+from datetime import datetime, timedelta
+from datetime import timezone as dt_timezone
 from typing import Any
 
 import pandas as pd
diff --git a/src/easy_tdx/web/routers/stream.py b/src/easy_tdx/web/routers/stream.py
index 4425661..2a556a5 100644
--- a/src/easy_tdx/web/routers/stream.py
+++ b/src/easy_tdx/web/routers/stream.py
@@ -15,6 +15,7 @@ from __future__ import annotations
 import asyncio
 import json
 import logging
+from collections.abc import AsyncGenerator
 
 from fastapi import APIRouter, Request
 from fastapi.responses import StreamingResponse
@@ -37,7 +38,7 @@ async def stream_quotes(request: Request) -> StreamingResponse:
 
     qid, queue = streamer.subscribe()
 
-    async def event_gen():  # type: ignore[no-untyped-def]
+    async def event_gen() -> AsyncGenerator[str, None]:
         try:
             # 首帧 hello：告诉前端连接可用 + 当前订阅规模
             hello = {"type": "hello", "subscribers": streamer.subscriber_count}
diff --git a/src/easy_tdx/web/routers/watchlist.py b/src/easy_tdx/web/routers/watchlist.py
index 8b41541..3d2ece3 100644
--- a/src/easy_tdx/web/routers/watchlist.py
+++ b/src/easy_tdx/web/routers/watchlist.py
@@ -20,26 +20,28 @@ class WatchItemAdd(BaseModel):
 
 
 class WatchlistResponse(BaseModel):
-    items: list[dict]
+    items: list[dict[str, object]]
     count: int
 
 
 @router.get("/watchlist", response_model=WatchlistResponse)
-async def list_watchlist(group: str | None = Query(None, description="按分组过滤")) -> WatchlistResponse:
+async def list_watchlist(
+    group: str | None = Query(None, description="按分组过滤"),
+) -> WatchlistResponse:
     """列出全部自选（按加入顺序）。"""
     items = get_watchlist_store().list_all(group=group)
     return WatchlistResponse(items=[i.to_dict() for i in items], count=len(items))
 
 
-@router.post("/watchlist", response_model=dict)
-async def add_watch_item(req: WatchItemAdd) -> dict:
+@router.post("/watchlist", response_model=dict[str, object])
+async def add_watch_item(req: WatchItemAdd) -> dict[str, object]:
     """加入自选（幂等：重复加入仅刷新名称）。"""
     item = get_watchlist_store().add(req.market, req.code, name=req.name, group=req.group)
     return {"ok": True, "item": item.to_dict()}
 
 
-@router.delete("/watchlist/{market}/{code}", response_model=dict)
-async def remove_watch_item(market: str, code: str) -> dict:
+@router.delete("/watchlist/{market}/{code}", response_model=dict[str, object])
+async def remove_watch_item(market: str, code: str) -> dict[str, object]:
     """移除自选。"""
     if market.upper() not in {"SZ", "SH", "BJ"}:
         raise HTTPException(status_code=400, detail=f"非法市场: {market}")
diff --git a/src/easy_tdx/web/watchlist_store.py b/src/easy_tdx/web/watchlist_store.py
index e310aa8..28872b3 100644
--- a/src/easy_tdx/web/watchlist_store.py
+++ b/src/easy_tdx/web/watchlist_store.py
@@ -56,7 +56,7 @@ class WatchItem:
         """前端统一标识：SH600000 形式。"""
         return f"{self.market}{self.code}"
 
-    def to_dict(self) -> dict:
+    def to_dict(self) -> dict[str, object]:
         return {
             "market": self.market,
             "code": self.code,
@@ -125,7 +125,8 @@ class WatchlistStore:
         market = market.upper()
         with _write_lock, self._connect() as conn:
             row = conn.execute(
-                "SELECT * FROM watchlist WHERE market = ? AND code = ?", (market, code)
+                "SELECT * FROM watchlist WHERE market = ? AND code = ?",
+                (market, code),
             ).fetchone()
             if row is not None:
                 if name and name != row["name"]:
@@ -141,19 +142,26 @@ class WatchlistStore:
                     created_at=row["created_at"],
                     sort_order=row["sort_order"],
                 )
-            next_order = conn.execute("SELECT COALESCE(MAX(sort_order), 0) + 1 FROM watchlist").fetchone()[0]
+            next_order = conn.execute(
+                "SELECT COALESCE(MAX(sort_order), 0) + 1 FROM watchlist"
+            ).fetchone()[0]
             conn.execute(
                 "INSERT INTO watchlist (market, code, name, group_name, created_at, sort_order)"
                 " VALUES (?, ?, ?, ?, ?, ?)",
                 (market, code, name, group, _now_iso(), next_order),
             )
-        return WatchItem(market=market, code=code, name=name, group_name=group, created_at=_now_iso(), sort_order=next_order)
+        return WatchItem(
+            market=market, code=code, name=name, group_name=group,
+            created_at=_now_iso(), sort_order=next_order,
+        )
 
     def remove(self, market: str, code: str) -> bool:
         """移除自选；返回是否确实删除了一条。"""
         market = market.upper()
         with _write_lock, self._connect() as conn:
-            cur = conn.execute("DELETE FROM watchlist WHERE market = ? AND code = ?", (market, code))
+            cur = conn.execute(
+                "DELETE FROM watchlist WHERE market = ? AND code = ?", (market, code)
+            )
             return cur.rowcount > 0
 
 
diff --git a/tests/unit/test_watchlist_and_streamer.py b/tests/unit/test_watchlist_and_streamer.py
index f458d89..1de2510 100644
--- a/tests/unit/test_watchlist_and_streamer.py
+++ b/tests/unit/test_watchlist_and_streamer.py
@@ -12,7 +12,6 @@ from easy_tdx.models.enums import Market
 from easy_tdx.web.quote_streamer import INDEX_SYMBOLS, QuoteStreamer, _is_trading_hours
 from easy_tdx.web.watchlist_store import WatchlistStore
 
-
 # ── WatchlistStore ──────────────────────────────────────────────────────────
 
 
@@ -147,7 +146,8 @@ def test_streamer_backpressure_drops_oldest() -> None:
 
 
 def test_is_trading_hours() -> None:
-    from datetime import datetime, timedelta, timezone as dt_timezone
+    from datetime import datetime, timedelta
+    from datetime import timezone as dt_timezone
 
     tz = dt_timezone(timedelta(hours=8))
     assert _is_trading_hours(datetime(2026, 9, 1, 10, 0, tzinfo=tz)) is True  # 周二盘中