fix(bleed): remove dead begin_main_menu_bar() block from _gui_func (lines 1674-1697)

HelloImGui commits the menubar before invoking _gui_func, so begin_main_menu_bar()
always returned False. The 24-line block (Quit, View, Project menus) never executed.
Also removes the misaligned '# ---- Menubar' comment and dead '# --- Hubs ---' comment.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

gui_2.py

@@ -1671,30 +1671,6 @@ class App:
     for tc in self._pending_tool_calls:
      self._tool_log.append(tc)
     self._pending_tool_calls.clear()
-    # ---- Menubar
-   if imgui.begin_main_menu_bar():
-    if imgui.begin_menu("manual slop"):
-     if imgui.menu_item("Quit", "Ctrl+Q", False)[0]:
-      self.should_quit = True
-     imgui.end_menu()
-    if imgui.begin_menu("View"):
-     for name in self.show_windows:
-      _, self.show_windows[name] = imgui.menu_item(name, "", self.show_windows[name])
-     imgui.end_menu()
-    if imgui.begin_menu("Project"):
-     if imgui.menu_item("Save All", "Ctrl+S", False)[0]:
-      self._flush_to_project()
-      self._save_active_project()
-      self._flush_to_config()
-      save_config(self.config)
-      self.ai_status = "config saved"
-     if imgui.menu_item("Generate MD Only", "", False)[0]:
-      self._handle_md_only()
-     if imgui.menu_item("Reset Session", "", False)[0]:
-      self._handle_reset_session()
-     imgui.end_menu()
-    imgui.end_main_menu_bar()
-    # --- Hubs ---
    if self.show_windows.get("Context Hub", False):
     exp, self.show_windows["Context Hub"] = imgui.begin("Context Hub", self.show_windows["Context Hub"])
     if exp: