Add V2 admin feedback and safety review

[Paul Lizer (paullizer)]

Summary

• Adds dedicated React V2 administrator pages for reviewing user feedback and safety violations, including filtering, statistics, exports, edits, archive management, and the corresponding review workflows.
• Exposes the pages in the account menu only when the features and configured administrator/reviewer roles allow access; existing backend authorization remains authoritative. Consequential deletion and chat rechecks require confirmation.
• Adds admin guides and records the feature under version 0.261.277.

Linked issue

N/A - no linked issue.

Release Notes & Latest Features

• New Feature
• Bug Fix
• UI Enhancement
• Breaking Change
• Internal only

Is this visible to end users?

• Yes
• No

Is this admin-facing (Admin Settings, governance, deployment, config)?

• Yes
• No

Should this become a Latest Feature card?

• Yes
• No
• Already added

Screenshot needed for the card?

• Yes
• No
• Attached

Version bump

• application/single_app/config.py VERSION third segment bumped, or not needed because this is docs-only
• deployers/version.txt bumped, or not needed because deployers/ was not changed

Testing / validation

• Push-Location application\v2_ui; npm run build; $result = $LASTEXITCODE; Pop-Location; exit $result - passed (Vite reports the existing large-chunk warning).
• python .\functional_tests\test_v2_admin_review_pages.py - passed.
• python .\functional_tests\test_docs_app_surface_coverage.py and python .\functional_tests\test_docs_site_quality.py - passed.
• python .\scripts\check_xss_sinks.py --full-file application\v2_ui\src\pages\AdminFeedbackReviewPage.tsx application\v2_ui\src\pages\AdminSafetyViolationsPage.tsx application\v2_ui\src\App.tsx application\v2_ui\src\components\layout\Sidebar.tsx - passed.
• git -c core.whitespace=blank-at-eol,blank-at-eof,space-before-tab,cr-at-eol diff --check - passed.

Documentation

• Release notes updated, or not needed
• Feature documentation updated, or not needed (admin usage guides added under docs/guides/)
• Fix documentation updated, or not needed

Security checklist

• No Flask routes added; existing backend authorization remains in force
• No settings route changes; existing sanitized bootstrap settings drive reviewer navigation
• Browser JavaScript is served from local SimpleChat static assets only; no CDN-hosted JS added
• No secrets, keys, connection strings, or local-only artifacts are included