Badges: per-badge locked font sizes via cfg_json

Allows coordinators to pre-tune font sizes for attendees with long names
and have those sizes apply automatically on every kiosk, not just one machine.

- ae_types.ts: add cfg_json to ae_EventBadge interface
- db_events.ts: add cfg_json to Badge Dexie interface
- ae_events__event_badge.ts: add cfg_json to properties_to_save so it is
  persisted to IndexedDB on load and returned by the API
- print/+page.svelte: on first load per badge, read cfg_json.font_sizes and
  initialize font_size_name/title/affiliations/location state from saved values
  (guarded by _font_sizes_loaded_for to avoid clobbering user adjustments on
  background liveQuery refreshes)
- ae_comp__badge_print_controls.svelte: add lock_font_sizes() and
  reset_font_sizes_to_auto() functions; add Lock Sizes / Auto reset UI in the
  Staff adjustments section (trusted-only); button shows warning style when
  sizes are unsaved vs success when locked; status indicator shows what is
  currently locked

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

src/lib/types/ae_types.ts

@@ -507,6 +507,7 @@ export interface ae_EventBadge extends ae_BaseObj {
     agree_to_tc?: boolean | null;
 
     ticket_list?: any[] | null;
+    cfg_json?: any;
     data_json?: any;
     default_qry_str?: string | null;
 }