diff --git a/frontend/routes/upload.py b/frontend/routes/upload.py
index c0fbfbb..040edc3 100644
--- a/frontend/routes/upload.py
+++ b/frontend/routes/upload.py
@@ -17,6 +17,17 @@ async def root():
 
 @router.get("/upload", response_class=HTMLResponse)
 async def index(request: Request):
+    """
+    ✅ CORRECTION BUG 2 : si la requête vient de HTMX (header HX-Request),
+    on retourne uniquement le partial upload_form.html (sans navbar, sans layout).
+    Si c'est une navigation directe dans le navigateur, on retourne index.html complet.
+    """
+    is_htmx = request.headers.get("HX-Request") == "true"
+    if is_htmx:
+        return request.app.state.templates.TemplateResponse(
+            "partials/upload_form.html",
+            {"request": request},
+        )
     return request.app.state.templates.TemplateResponse(
         "index.html",
         {"request": request, "active_tab": "upload"},