fix(board-buttons): hide catalog controls on flash upload boards

Flash boards do not use catalog view, so hide catalog links and OP search
without leaving empty bracket placeholders in desktop board controls.

src/lib/utils/__tests__/route-utils.test.ts

@@ -13,6 +13,7 @@ import {
   isDirectoryListRoute,
   isDirectoryRoute,
   isFeedRoute,
+  isFlashBoardRoute,
   isLegacyBoardModQueueRoute,
   isModQueueRoute,
   isPendingPostRoute,
@@ -33,6 +34,7 @@ const communities = [
     title: '/mu/ - Music',
   },
   { address: 'random.eth', directoryCode: 'b', title: 'Random' },
+  { address: 'flash-posting.bso', directoryCode: 'f', title: '/f/ - Flash' },
 ];
 
 beforeEach(() => {
@@ -66,6 +68,11 @@ describe('directory mapping helpers', () => {
     expect(isDirectoryRoute('business.eth', communities)).toBe(false);
     expect(isDirectoryBoard('biz', communities)).toBe(true);
     expect(isDirectoryBoard('business.eth', communities)).toBe(false);
+
+    expect(isFlashBoardRoute('f', communities)).toBe(true);
+    expect(isFlashBoardRoute('flash-posting.bso', communities)).toBe(true);
+    expect(isFlashBoardRoute('mu', communities)).toBe(false);
+    expect(isFlashBoardRoute('music-posting.bso', communities)).toBe(false);
   });
 });
 

src/lib/utils/route-utils.ts

@@ -1,4 +1,5 @@
 import { DirectoryCommunity, findDirectoryByAddress, normalizeBoardAddress } from '../../hooks/use-directories';
+import { isFlashDirectory, isFlashDirectoryCode } from '../flash-tags';
 import { getEffectiveTimeFilterName, getSearchWithTimeFilter } from './time-filter-utils';
 
 /**
@@ -122,6 +123,17 @@ export const isDirectoryRoute = (boardIdentifier: string, communities: Directory
   return directoryToAddress.has(boardIdentifier);
 };
 
+/** True when the board route segment refers to a flash (/f/) upload directory board. */
+export const isFlashBoardRoute = (boardIdentifier: string | undefined, communities: DirectoryCommunity[]): boolean => {
+  if (isFlashDirectoryCode(boardIdentifier)) {
+    return true;
+  }
+  if (!boardIdentifier) {
+    return false;
+  }
+  return isFlashDirectory(findDirectoryByAddress(communities, boardIdentifier));
+};
+
 /** @deprecated Use {@link isDirectoryRoute} */
 export const isDirectoryBoard = isDirectoryRoute;