feat(settings): 헤더 빌드 버전 배지 (v2.2.207)

Settings 헤더에 현재 확장 버전 표시(provider가 __VERSION__ 주입). 새 vsix
로딩 여부 확인 마커.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/features/settings/settingsPanelProvider.ts

@@ -717,9 +717,11 @@ export class SettingsPanelProvider implements vscode.WebviewViewProvider {
         const scriptUri = webview.asWebviewUri(vscode.Uri.joinPath(mediaRoot, 'settings-panel.js')).toString();
         const tplPath = path.join(this._deps.extensionUri.fsPath, 'media', 'settings-panel.html');
         const tpl = fs.readFileSync(tplPath, 'utf8');
+        const version = (this._deps.context?.extension?.packageJSON?.version as string) || '';
         return tpl
             .replace('__STYLES_URI__', stylesUri)
-            .replace('__SCRIPT_URI__', scriptUri);
+            .replace('__SCRIPT_URI__', scriptUri)
+            .replace('__VERSION__', version);
     }
 }