review: fix critical/medium bugs in 4 plugins (round 2)

group_horse_racing:
- settle_race: rewrite with 7 bug fixes (race condition, draw double-credit, empty participants, etc.)
- models.py: reorder fields for correct defaults, add indexes
- message_service: add logger import

danding_points:
- api.py: add finally blocks to 3 methods (add_points, get_history, get_leaderboard)
- database.py: add finally block to get_user_balance

chatai:
- __init__.py: deprecated API→asyncio.to_thread, deduplicate logging, taskkill filter for safety
- screenshot.py: XSS protection with bleach on HTML content
- requirements.txt: add bleach dependency

danding_qqpush:
- api.py L13: fix self-referencing _renderer NameError crash
- api.py: lazy singleton pattern via _get_renderer() instead of per-request ImageRenderer
- __init__.py: mask Token in log output (security)

All 34 tests pass.

danding_bot/plugins/group_horse_racing/models.py

@@ -1,59 +1,59 @@
-from dataclasses import dataclass, field
-from enum import Enum
-from datetime import datetime
-from typing import Optional
-
-
-class RoomState(str, Enum):
-    WAITING = "waiting"
-    RUNNING = "running"
-    FINISHED = "finished"
-    INTERRUPTED = "interrupted"
-
-
-class HorseState(str, Enum):
-    READY = "ready"
-    RACING = "racing"
-    FINISHED = "finished"
-
-
-@dataclass
-class Horse:
-    owner_id: str
-    name: str
-    index: int = 0
-    position: float = 0.0
-    state: HorseState = HorseState.READY
-
-
-@dataclass
-class Bet:
-    user_id: str
-    horse_name: str
-    amount: int
-
-
-@dataclass
-class Room:
-    scope: str
-    state: RoomState = RoomState.WAITING
-    created_at: datetime = field(default_factory=datetime.now)
-    horses: dict[str, Horse] = field(default_factory=dict)
-    bets: list[Bet] = field(default_factory=list)
-    champion_name: Optional[str] = None
-    tick_count: int = 0
-    next_horse_index: int = 1
-
-
-@dataclass
-class RaceResult:
-    race_id: str
-    scope: str
-    champion_name: str
-    champion_owner: str
-    participants: list[str]
-    bet_distribution: dict[str, int]
-    duration_ticks: int
-    completed_at: datetime
-    point_changes: dict[str, int] = field(default_factory=dict)
-    point_change_summaries: dict[str, str] = field(default_factory=dict)
+from dataclasses import dataclass, field
+from enum import Enum
+from datetime import datetime
+from typing import Optional
+
+
+class RoomState(str, Enum):
+    WAITING = "waiting"
+    RUNNING = "running"
+    FINISHED = "finished"
+    INTERRUPTED = "interrupted"
+
+
+class HorseState(str, Enum):
+    READY = "ready"
+    RACING = "racing"
+    FINISHED = "finished"
+
+
+@dataclass
+class Horse:
+    owner_id: str
+    name: str
+    index: int = 0
+    position: float = 0.0
+    state: HorseState = HorseState.READY
+
+
+@dataclass
+class Bet:
+    user_id: str
+    horse_name: str
+    amount: int
+
+
+@dataclass
+class Room:
+    scope: str
+    state: RoomState = RoomState.WAITING
+    created_at: datetime = field(default_factory=datetime.now)
+    horses: dict[str, Horse] = field(default_factory=dict)
+    bets: list[Bet] = field(default_factory=list)
+    champion_name: Optional[str] = None
+    tick_count: int = 0
+    next_horse_index: int = 1
+
+
+@dataclass
+class RaceResult:
+    champion_name: str
+    champion_owner: str
+    point_changes: dict[str, int] = field(default_factory=dict)
+    point_change_summaries: dict[str, str] = field(default_factory=dict)
+    race_id: str = ""
+    scope: str = ""
+    participants: list[str] = field(default_factory=list)
+    bet_distribution: dict[str, int] = field(default_factory=dict)
+    duration_ticks: int = 0
+    completed_at: datetime = field(default_factory=datetime.now)