feat: Initialize frontend and backend structure with essential configurations

- Added TypeScript build info for frontend.
- Created Vite configuration for React application.
- Implemented pre-commit hook to run checks before commits.
- Set up PostgreSQL Dockerfile with PostGIS support and initialization scripts.
- Added database creation script for PostgreSQL with necessary extensions.
- Established Python project configuration with dependencies and development tools.
- Developed pre-commit script to enforce code quality checks for backend and frontend.
- Created PowerShell script to set up Git hooks path.

backend/tests/test_auth_api.py

@@ -0,0 +1,81 @@
+from uuid import uuid4
+
+from fastapi.testclient import TestClient
+
+from backend.app.main import app
+
+client = TestClient(app)
+
+
+def test_login_returns_token_and_user() -> None:
+    response = client.post(
+        "/api/auth/login",
+        json={"username": "demo", "password": "railgame123"},
+    )
+    assert response.status_code == 200
+
+    payload = response.json()
+    assert "accessToken" in payload
+    assert payload["tokenType"] == "bearer"
+    assert payload["user"]["username"] == "demo"
+
+
+def test_login_with_invalid_credentials_fails() -> None:
+    response = client.post(
+        "/api/auth/login",
+        json={"username": "demo", "password": "wrong"},
+    )
+    assert response.status_code == 401
+
+
+def test_me_endpoint_returns_current_user() -> None:
+    login = client.post(
+        "/api/auth/login",
+        json={"username": "demo", "password": "railgame123"},
+    )
+    token = login.json()["accessToken"]
+
+    response = client.get(
+        "/api/auth/me", headers={"Authorization": f"Bearer {token}"}
+    )
+    assert response.status_code == 200
+    assert response.json()["username"] == "demo"
+
+
+def test_register_creates_user_and_returns_token() -> None:
+    username = f"player_{uuid4().hex[:8]}"
+    response = client.post(
+        "/api/auth/register",
+        json={
+            "username": username,
+            "password": "testpass123",
+            "fullName": "Test Player",
+        },
+    )
+    assert response.status_code == 201
+    payload = response.json()
+    assert payload["user"]["username"] == username
+    assert payload["tokenType"] == "bearer"
+
+    me = client.get(
+        "/api/auth/me",
+        headers={"Authorization": f"Bearer {payload['accessToken']}"},
+    )
+    assert me.status_code == 200
+    assert me.json()["username"] == username
+
+
+def test_register_duplicate_username_returns_conflict() -> None:
+    username = f"dupe_{uuid4().hex[:8]}"
+    first = client.post(
+        "/api/auth/register",
+        json={"username": username, "password": "firstpass"},
+    )
+    assert first.status_code == 201
+
+    duplicate = client.post(
+        "/api/auth/register",
+        json={"username": username, "password": "secondpass"},
+    )
+    assert duplicate.status_code == 409
+    assert duplicate.json()["detail"] == "Username already exists"