fix: add Cache-Control no-store to dashboard to prevent stale data

app/admin/router.py

@@ -2,7 +2,7 @@ from jinja2 import Environment, FileSystemLoader
 from loguru import logger
 
 from fastapi import APIRouter, Form, Request
-from fastapi.responses import HTMLResponse, RedirectResponse
+from fastapi.responses import HTMLResponse, RedirectResponse, Response
 from sqlalchemy import func, select
 
 from app.database import async_session_factory
@@ -53,8 +53,8 @@ async def dashboard(request: Request):
         )
         total_revenue = float((await session.execute(rev_stmt)).scalar_one())
 
-    return HTMLResponse(
-        _render(
+    return Response(
+        content=_render(
             "dashboard.html",
             request=request,
             total_users=total_users,
@@ -65,7 +65,9 @@ async def dashboard(request: Request):
             total_payments=total_payments,
             confirmed_payments=confirmed_payments,
             total_revenue=total_revenue,
-        )
+        ),
+        media_type="text/html",
+        headers={"Cache-Control": "no-store, must-revalidate"},
     )