Initial commit: SQL audit platform v0.1.0

FastAPI backend with auth, user, instance, ticket, query, dashboard APIs.
React + TypeScript frontend with mock data UI (10 pages).
SQLite + async SQLAlchemy, JWT auth, role-based access control.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/app/schemas/auth.py

@@ -0,0 +1,24 @@
+from typing import Optional
+from pydantic import BaseModel
+
+
+class LoginRequest(BaseModel):
+    username: str
+    password: str
+
+
+class TokenResponse(BaseModel):
+    access_token: str
+    token_type: str = "bearer"
+    user: "UserBrief"
+
+
+class UserBrief(BaseModel):
+    id: int
+    username: str
+    display_name: str
+    role: str
+    email: Optional[str] = None
+
+    class Config:
+        from_attributes = True