Fixed login redirecting issues

app/routes/admin_pages.py

@@ -27,8 +27,13 @@ from fastapi import APIRouter, Request, Depends, Path
 from fastapi.responses import HTMLResponse, RedirectResponse
 from fastapi.templating import Jinja2Templates
 from sqlalchemy.orm import Session
+from typing import Optional
 
-from app.api.deps import get_current_admin_from_cookie_or_header, get_db
+from app.api.deps import (
+    get_current_admin_from_cookie_or_header,
+    get_current_admin_optional,
+    get_db
+)
 from models.database.user import User
 
 router = APIRouter()
@@ -40,23 +45,37 @@ templates = Jinja2Templates(directory="app/templates")
 # ============================================================================
 
 @router.get("/", response_class=RedirectResponse, include_in_schema=False)
-async def admin_root():
+async def admin_root(
+        current_user: Optional[User] = Depends(get_current_admin_optional)
+):
     """
-    Redirect /admin/ to /admin/login.
+    Redirect /admin/ based on authentication status.
 
-    Simple approach:
-    - Unauthenticated users → see login form
-    - Authenticated users → login page shows form (they can navigate to dashboard)
+    - Authenticated admin users → /admin/dashboard
+    - Unauthenticated users → /admin/login
     """
+    if current_user:
+        # User is already logged in as admin, redirect to dashboard
+        return RedirectResponse(url="/admin/dashboard", status_code=302)
+
     return RedirectResponse(url="/admin/login", status_code=302)
 
 
 @router.get("/login", response_class=HTMLResponse, include_in_schema=False)
-async def admin_login_page(request: Request):
+async def admin_login_page(
+        request: Request,
+        current_user: Optional[User] = Depends(get_current_admin_optional)
+):
     """
     Render admin login page.
-    No authentication required.
+
+    If user is already authenticated as admin, redirect to dashboard.
+    Otherwise, show login form.
     """
+    if current_user:
+        # User is already logged in as admin, redirect to dashboard
+        return RedirectResponse(url="/admin/dashboard", status_code=302)
+
     return templates.TemplateResponse(
         "admin/login.html",
         {"request": request}