[yucheng922003]

Let candidates save multiple attempts without repe## Summary

• Add checkboxes to past interview attempts, selected by default.
• Add Select all / Deselect all and Download selected controls.
• Download only selected reports visible under the current filters.
• Preserve selections when filters change and reset them when history is reloaded.
• Reuse the existing Markdown download logic to preserve filenames and report content.

Screenshots

Before

After — default state

After — after clicking batch download

After — filtered with no matching reports

Testing

• Manually verified selection, filtering, and multiple Markdown downloads in Chrome on Windows.
• Passed ESLint, Prettier, DOM contract tests, and download unit tests.
• Added browser tests for selection and batch downloads; these are pending CI execution.

Closes #444titive downloads.

---

Summary by cubic

Adds checkboxes to past interview attempts so you can download multiple saved reports at once instead of one by one.

• Attempts are ticked by default; the Select all / Deselect all and Download selected controls sit above the list.
• Batch downloads only the ticked reports visible under the current filters, reusing the existing per-report Markdown download.
• Selections persist across filter changes and reset when the history reloads.
• Browsers may block downloads after the first; the page tells users how to allow them.

Closes #444.

^{Written for commit f056d58. Summary will update on new commits.}

[jserv]

Deleting one report brings back every untick. deleteSavedReport calls reloadAfterDelete, which goes through showProgress and normalizeProgressEntries and builds new row objects, so this WeakSet recognizes none of them. If a user unticks A and then deletes B, A is ticked again and the next "Download selected" includes a report they excluded. Key the unticked set on attempt.id (fall back to the row object for rows with no id), clear it only when the history source changes (account vs device), and add a browser test that unticks A, deletes B, and asserts A stays unticked.