FIX: Loading requests from history doesn't immediately mark the tab as modified

src/tab_manager.py

@@ -40,13 +40,16 @@ class TabManager:
 
         # Store original request for change detection
         # Make a copy to avoid reference issues
+        # Create original for saved requests or loaded history items (anything with content)
+        # Only skip for truly blank new requests
+        has_content = bool(request.url or request.body or request.headers)
         original_request = HttpRequest(
             method=request.method,
             url=request.url,
             headers=request.headers.copy(),
             body=request.body,
             syntax=request.syntax
-        ) if saved_request_id else None
+        ) if has_content else None
 
         tab = RequestTab(
             id=tab_id,