Initial commit: Complete project-bootstrap tool

- Bootstrap script for creating monorepo projects
- FastAPI backend templates with uv, ruff, mypy, pytest
- React frontend templates with TypeScript, ESLint, Prettier
- Docker Compose setup with backend, frontend, and database
- 9 development and CI scripts
- Gitea Actions CI/CD workflows
- Comprehensive documentation (8 files)
- 45 template files for complete project structure
- Automated verification script (all tests pass)
- Based on coding-agent-rules standards

templates/backend/app/core/errors.py

@@ -0,0 +1,58 @@
+"""Error handling utilities."""
+
+from typing import Any
+
+from fastapi import HTTPException, status
+
+
+class AppException(Exception):
+    """Base application exception."""
+
+    def __init__(self, message: str, details: dict[str, Any] | None = None) -> None:
+        """Initialize exception."""
+        self.message = message
+        self.details = details or {}
+        super().__init__(self.message)
+
+
+class NotFoundError(AppException):
+    """Resource not found error."""
+
+    pass
+
+
+class ValidationError(AppException):
+    """Validation error."""
+
+    pass
+
+
+class AuthenticationError(AppException):
+    """Authentication error."""
+
+    pass
+
+
+def raise_not_found(resource: str, identifier: str | int) -> None:
+    """Raise HTTP 404 exception."""
+    raise HTTPException(
+        status_code=status.HTTP_404_NOT_FOUND,
+        detail=f"{resource} with id '{identifier}' not found",
+    )
+
+
+def raise_validation_error(message: str) -> None:
+    """Raise HTTP 422 exception."""
+    raise HTTPException(
+        status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
+        detail=message,
+    )
+
+
+def raise_unauthorized(message: str = "Unauthorized") -> None:
+    """Raise HTTP 401 exception."""
+    raise HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail=message,
+        headers={"WWW-Authenticate": "Bearer"},
+    )