refactor: PostDetail cards as status dashboard, panel for creation
Reverted inline asset creation — the copy workflow (original → approve →
translate → approve translations) needs the full panel, not a card form.
PostDetail cards now:
- "Create new" → creates asset (type pre-set, post linked) → opens panel
- "Open" → opens panel for editing/reviewing
- Card shows: title, status, preview, approval info (status dashboard)
Panel handles: write copy, add translations, upload files, select reviewer,
submit for review — the full workflow in its proper workspace.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
