Add /api/v1/me/data endpoints for users to view, export, and delete
their own data without admin privileges (GDPR compliance).
Backend:
- New MeModule with MeController and MeService
- GET /api/v1/me/data - view own data summary
- GET /api/v1/me/data/export - download as JSON
- DELETE /api/v1/me/data - delete all own data
Frontend:
- New /settings/my-data page with full data overview
- Export button for JSON download
- DeleteConfirmationModal with email verification
- Link from settings page to my-data
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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