Initial commit: KPI Management System Backend

Features:
- FastAPI backend with JWT authentication
- MySQL database with SQLAlchemy ORM
- KPI workflow: draft → pending → approved → evaluation → completed
- Ollama LLM API integration for AI features
- Gitea API integration for version control
- Complete API endpoints for KPI, dashboard, notifications

Tables: KPI_D_* prefix naming convention

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/schemas/notification.py

@@ -0,0 +1,47 @@
+"""
+通知 Schemas
+"""
+from datetime import datetime
+from typing import Optional
+from pydantic import BaseModel
+
+
+class NotificationResponse(BaseModel):
+    """通知回應"""
+
+    id: int
+    type: str
+    title: str
+    content: Optional[str]
+    related_sheet_id: Optional[int]
+    is_read: bool
+    read_at: Optional[datetime]
+    created_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class NotificationPreferenceResponse(BaseModel):
+    """通知偏好回應"""
+
+    email_enabled: bool
+    in_app_enabled: bool
+    reminder_days_before: int
+
+    class Config:
+        from_attributes = True
+
+
+class NotificationPreferenceUpdate(BaseModel):
+    """更新通知偏好"""
+
+    email_enabled: Optional[bool] = None
+    in_app_enabled: Optional[bool] = None
+    reminder_days_before: Optional[int] = None
+
+
+class UnreadCountResponse(BaseModel):
+    """未讀數量回應"""
+
+    count: int