chore(quality): apply ruff autofixes and formatting (223 fixes, regression-free: 118/118 tests pass)

app/schemas/dashboard.py

@@ -3,7 +3,6 @@
 from __future__ import annotations
 
 from datetime import datetime
-from typing import Optional
 
 from pydantic import BaseModel, ConfigDict
 
@@ -27,13 +26,13 @@ class ActivityFeedItem(BaseModel):
     id: int
     type: ActivityType
     subject: str
-    body: Optional[str] = None
-    account_id: Optional[int] = None
-    contact_id: Optional[int] = None
-    deal_id: Optional[int] = None
+    body: str | None = None
+    account_id: int | None = None
+    contact_id: int | None = None
+    deal_id: int | None = None
     owner_id: int
-    completed_at: Optional[datetime] = None
-    due_date: Optional[datetime] = None
+    completed_at: datetime | None = None
+    due_date: datetime | None = None
     created_at: datetime