v2.3.2: fix HelpView showing blank window (regression in v2.3.1)

In v2.3.1 the new 'Re-run Onboarding' button was added but the
self.setLayout(main_layout) line was accidentally indented into the
new _reopen_onboarding method body, so init_ui returned without
applying the layout. Result: F1 opened an empty dialog with no tabs.

Move setLayout back to the end of init_ui.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ui/help_view.py

@@ -68,14 +68,14 @@ class HelpView(QDialog):
         button_layout.addWidget(close_button)
         main_layout.addLayout(button_layout)
 
+        self.setLayout(main_layout)
+
     def _reopen_onboarding(self):
         """부모 윈도우의 show_onboarding 호출 후 도움말 닫음."""
         self.close()
         if self.parent() and hasattr(self.parent(), 'show_onboarding'):
             self.parent().show_onboarding()
 
-        self.setLayout(main_layout)
-
     def _make_tab(self, html: str) -> QWidget:
         container = QWidget()
         layout = QVBoxLayout()