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/common.py

@@ -0,0 +1,37 @@
+"""
+共用 Schemas
+"""
+from typing import Generic, TypeVar, Optional, List
+from pydantic import BaseModel
+
+T = TypeVar("T")
+
+
+class ErrorDetail(BaseModel):
+    """錯誤詳情"""
+
+    code: str
+    message: str
+    details: Optional[dict] = None
+
+
+class ErrorResponse(BaseModel):
+    """錯誤回應"""
+
+    error: ErrorDetail
+
+
+class PaginatedResponse(BaseModel, Generic[T]):
+    """分頁回應"""
+
+    items: List[T]
+    total: int
+    page: int
+    page_size: int
+    pages: int
+
+
+class MessageResponse(BaseModel):
+    """訊息回應"""
+
+    message: str