fix(gui_2): use str sentinel not bytes in _capture_workspace_profile

src/gui_2.py

@@ -598,15 +598,15 @@ class App:
   finally:
    self._is_applying_snapshot = False
 
- def _capture_workspace_profile(self, name: str) -> models.WorkspaceProfile:
-  if not getattr(self, "_ini_capture_ready", False):
-   self._ini_capture_ready = True
-   ini = b""
-  else:
-   try:
-    ini = imgui.save_ini_settings_to_memory()
-   except Exception:
-    ini = b""
+  def _capture_workspace_profile(self, name: str) -> models.WorkspaceProfile:
+   if not getattr(self, "_ini_capture_ready", False):
+    self._ini_capture_ready = True
+    ini = ""
+   else:
+    try:
+     ini = str(imgui.save_ini_settings_to_memory() or "")
+    except Exception:
+     ini = ""
   panel_states = {
    "ui_separate_context_preview": getattr(self, "ui_separate_context_preview", False),
    "ui_separate_message_panel": getattr(self, "ui_separate_message_panel", False),