✨ feat(vscode): worktree 打开方式可选 VS Code/PyCharm，并修复 handleOpenWorktree 不展开 ~ 的打开报错

- worktree.ts: handleOpenWorktree/handleDeleteWorktree/dispatchImplTabPostCloseAsync 三处改用 resolveWorktreePath，修复带 ~ 的存量路径被拼成 <工作区>/~/... 导致打不开
- 新增全局设置 worktreeOpenWith（'vscode' | 'pycharm'，默认 vscode），贯穿 store/settings handler/messages/KanbanPanel 与 webview 的 messages/useIssues/App/SettingsModal「钩子」分组新增「工作树打开方式」下拉
- handleOpenWorktree 按设置分支：pycharm 走 JetBrains pycharm 启动器，ENOENT 时提示启用命令行启动器

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

vscode/src/panel/KanbanPanel.ts

@@ -841,6 +841,7 @@ export class KanbanWebviewPanel {
         devBranch: s.devBranch,
         autoBuildBranch: s.autoBuildBranch,
         worktreeDirectory: s.worktreeDirectory,
+        worktreeOpenWith: s.worktreeOpenWith,
         worktreePostCreateScript: s.worktreePostCreateScript,
         worktreePreRemoveScript: s.worktreePreRemoveScript,
         implTabPreCreateScript: s.implTabPreCreateScript,
@@ -901,6 +902,7 @@ export class KanbanWebviewPanel {
           devBranch: s.devBranch,
           autoBuildBranch: s.autoBuildBranch,
           worktreeDirectory: s.worktreeDirectory,
+          worktreeOpenWith: s.worktreeOpenWith,
           worktreePostCreateScript: s.worktreePostCreateScript,
           worktreePreRemoveScript: s.worktreePreRemoveScript,
           implTabPreCreateScript: s.implTabPreCreateScript,