Viktor Miller 64caccc5c1 fix: resolve form submission issues and add CPT detail view
- Rename day/month/year form fields to umzug_day/umzug_month/umzug_year
  to avoid conflict with WordPress reserved public query variables that
  caused a 404 on form POST
- Move form handler instantiation to init_hooks() so handle_submission
  registers on the init action before it fires
- Add standalone template fallback: detect [umzugsliste] shortcode in
  page content when form_page_id option is not set
- Add submission details meta box to CPT entries showing addresses,
  furniture, additional work, and status
- Add German translations for all new admin meta box strings

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-07 13:03:31 +09:00
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