feat: add logo and polish icon presentation

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

extension/src/setup/setup.ts

@@ -109,6 +109,7 @@ function render(): void {
 
   app.innerHTML = `
     <div class="pad" style="padding-top:12px;">
+      <img class="brand-logo" src="icons/idfoto-logo.svg" alt="" style="margin-bottom:12px;">
       <div class="brand" style="margin-bottom:4px;">idfoto vault setup</div>
       ${progressHtml}
       ${state.error ? `<div class="error">${escapeHtml(state.error)}</div>` : ''}