CRITICAL FIX: Economist submission package was showing no data because
the frontend was storing the entire API response wrapper instead of
extracting the actual post and submission data.
Changes:
- submission-modal-enhanced.js: Extract .post from blog API response
- submission-modal-enhanced.js: Extract .data from submissions API response
- publications.routes.js: Restore original routes and add /targets endpoint
- Cache version bumped to force browser updates
Fixes: #economist-submission-data-missing