feat: status dropdowns, difficulty badges, published=violet

- STATUS_COLORS: published → violet, draft → gray
- StatusSelect: shared dropdown component with status colors
- Top bar: picture status dropdown (uploaded/published/blocked)
- ObjectListPanel: per-object status dropdown, changeable inline
- PairsPanel collapsed: difficulty badge (Leicht/Mittel) + status badge
- EditPairForm: status dropdown at top of edit form

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/tables.js

@@ -276,9 +276,9 @@ export const TABLES = {
 };
 
 export const STATUS_COLORS = {
-  published:   'bg-green-100 text-green-800',
+  published:   'bg-violet-100 text-violet-800',
   blocked:     'bg-red-100 text-red-800',
-  draft:       'bg-gray-100 text-gray-700',
+  draft:       'bg-gray-100 text-gray-600',
   uploaded:    'bg-blue-100 text-blue-800',
   requested:   'bg-yellow-100 text-yellow-800',
   translated:  'bg-indigo-100 text-indigo-800',