v2.3.1: add 'Re-run Onboarding' button to Help dialog

v2.3.0 had show_onboarding() method but no UI entry point. Existing
users couldn't reach the wizard since auto-migration marks them done.
Now Help dialog (F1) has a button to re-trigger the wizard.

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

CHANGELOG.md

@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## [2.3.1] — 2026-04-30
+
+### Fixed
+- **도움말 다이얼로그에 "온보딩 다시 보기" 버튼 추가**
+  - v2.3.0에서 `show_onboarding()` 메서드는 만들었지만 UI 진입점 누락
+  - 이제 도움말 (F1) → 좌측 하단 "🚀 온보딩 다시 보기" 버튼으로 위저드 재실행 가능
+  - 본인 검증/설정 변경 시 유용
+
 ## [2.3.0] — 2026-04-30
 
 ### Added — Phase 1 + E1 (소비자 친화 6종)

core/version.py

@@ -4,4 +4,4 @@
 릴리스 시 이 값을 올린 후 git tag → push.
 CHANGELOG.md의 최상단 항목과 일치시킬 것.
 """
-__version__ = '2.3.0'
+__version__ = '2.3.1'

ui/help_view.py

@@ -51,16 +51,29 @@ class HelpView(QDialog):
 
         button_layout = QHBoxLayout()
         button_layout.setContentsMargins(20, 10, 20, 20)
+
+        # 온보딩 다시 보기 (왼쪽)
+        onboarding_button = QPushButton("🚀 온보딩 다시 보기")
+        onboarding_button.setMinimumHeight(40)
+        onboarding_button.clicked.connect(self._reopen_onboarding)
+        button_layout.addWidget(onboarding_button)
+
         button_layout.addStretch()
+
         close_button = QPushButton(tr('btn.close'))
         close_button.setObjectName("btn_primary")
         close_button.setMinimumHeight(40)
         close_button.setMinimumWidth(120)
         close_button.clicked.connect(self.close)
         button_layout.addWidget(close_button)
-        button_layout.addStretch()
         main_layout.addLayout(button_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: