feat(hooks): permission-driven gating via useHasPermission

Replace the rank-level family (useHasRankLevel + STAFF_LEVELS
constants + useIsRank) with a permission-driven family that reads
straight from the deployment's `permission_definitions` table — no
more hardcoded SecurityLevel/rank-id thresholds on the client. A new
rank in permission_ranks or a re-shuffling of permission_definitions
rank columns now propagates through the UI automatically.

Renderer-side wire shipped in companion commit
feat/react19-event-bus@159c5eb (UserPermissionsMapParser + Event,
SessionDataManager.getPermissionsSnapshot + USER_PERMISSIONS_UPDATED).

New public API in `useSessionSnapshots.ts`:
- useUserPermissions(): ReadonlyMap<string, number>  — full map
- useHasPermission(key): boolean                       — > 0 ⇒ true
- usePermissionValue(key): number                      — raw 1/2 or 0
- useIsAmbassador() now aliases useHasPermission('acc_ambassador')
- useUserRank() kept for PRESENTATIONAL use only (badge, prefix,
  prefix color) — documented as such in JSDoc; gating must use
  useHasPermission.

Dropped:
- src/api/nitro/session/RankLevels.ts (STAFF_LEVELS constants)
- useHasRankLevel / useIsRank exports (rank-based gating)

11 consumer migrations, each mapped to the right
`permission_definitions.permission_key`:

  - ToolbarView (mod-only chat-input button)        → acc_supporttool
  - ChooserWidgetView (room-object id column)       → acc_supporttool
  - CatalogClassicView (admin toggles)              → acc_catalogfurni
  - CatalogModernView (admin toggles)               → acc_catalogfurni
  - FurniEditorView (panel access)                  → acc_catalogfurni
  - CalendarView (force-open day)                   → acc_calendar_force
  - InfoStandWidgetFurniView (mod buildtools btn)   → acc_anyroomowner
  - AvatarInfoWidgetPetView (canPickUp)             → acc_anyroomowner
  - FurnitureMannequinView (controller mode)        → acc_anyroomowner
  - YouTubePlayerView (isMyRoom)                    → acc_anyroomowner
  - NavigatorRoomInfoView 'settings'                → acc_anyroomowner
  - NavigatorRoomInfoView 'staff_pick'              → acc_staff_pick

Test refresh:
- useUserRank still tested for the presentational shape.
- useHasPermission: true for non-zero, false for absent/zero.
- usePermissionValue: raw 1 / 2 / 0 (default).
- useUserPermissions: full map exposure.
- Runtime promote test: mutate the permissions map + dispatch
  USER_PERMISSIONS_UPDATED, assert useHasPermission flips false→true.
  Locks in the new reactive contract.

Mock unchanged (the test sets getPermissionsSnapshot via vi.mocked).

Verification: yarn typecheck clean, yarn lint:hooks clean, yarn test
214/214 (213 prior + 1 net new for useUserPermissions). Backward
compatible: older Arcturus deployments don't ship the map → empty
snapshot → every gate is false → mod UI hidden (safe default).

src/components/furni-editor/FurniEditorView.tsx

@@ -1,8 +1,7 @@
 import { AddLinkEventTracker, ILinkEventTracker, RemoveLinkEventTracker } from '@nitrots/nitro-renderer';
 import { FC, useCallback, useEffect, useState } from 'react';
-import { STAFF_LEVELS } from '../../api';
 import { NitroCardContentView, NitroCardHeaderView, NitroCardTabsItemView, NitroCardTabsView, NitroCardView } from '../../common';
-import { useHasRankLevel } from '../../hooks';
+import { useHasPermission } from '../../hooks';
 import { useFurniEditor } from '../../hooks/furni-editor';
 import { FurniEditorEditView } from './views/FurniEditorEditView';
 import { FurniEditorSearchView } from './views/FurniEditorSearchView';
@@ -22,7 +21,7 @@ export const FurniEditorView: FC<{}> = () =>
         searchItems, loadDetail, loadBySpriteId, updateItem, deleteItem, loadInteractions
     } = useFurniEditor();
 
-    const isMod = useHasRankLevel(STAFF_LEVELS.MOD);
+    const isMod = useHasPermission('acc_catalogfurni');
 
     // Auto-switch to edit tab when an item is selected
     useEffect(() =>