feat: UI/UX redesign and security audit

[otatechie]

Summary

• UI/UX redesign with consistent design tokens and NN/G usability principles
• Redesigned form components, buttons, badges, modals, and auth layout
• Heroicons replacing inline SVGs across 30+ components
• Security fixes for mass assignment, authorization, and session handling
• Configurable auth branding panel via APP_AUTH_BRANDING_PANEL env toggle

Test plan

• Verify auth pages render correctly
• Test dark mode across all pages
• Test form inputs, selects, checkboxes
• Test admin user and notification management
• Verify mobile responsiveness
• Test with APP_AUTH_BRANDING_PANEL=false

[github-actions]

Dependency Review

The following issues were found:

• ✅ 0 vulnerable package(s)
• ✅ 0 package(s) with incompatible licenses
• ✅ 0 package(s) with invalid SPDX license definitions
• ⚠️ 1 package(s) with unknown licenses.

See the Details below.

License Issues

package.json

Package	Version	License	Issue Type
@heroicons/vue	^2.2.0	Null	Unknown License

OpenSSF Scorecard

Package	Version	Score	Details
npm/@heroicons/vue	^2.2.0	Unknown	Unknown

Scanned Files

• package.json