fix(quotes): keep same-thread board previews local

src/lib/utils/__tests__/external-quote-utils.test.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it } from 'vitest';
+import { getExternalQuoteBoardAddress, getExternalQuoteBoardLabel } from '../external-quote-utils';
+
+const directories = [
+  {
+    address: 'music-posting.eth',
+    name: 'music-posting.bso',
+    title: '/mu/ - Music',
+  },
+  {
+    address: 'random.eth',
+    directoryCode: 'b',
+    title: 'Random',
+  },
+];
+
+describe('external quote board resolution', () => {
+  it('canonicalizes same-board aliases through the directories list', () => {
+    const reference = {
+      communityAddress: 'music-posting.bso',
+      kind: 'same-board' as const,
+      number: 42,
+      raw: '>>42',
+    };
+
+    expect(getExternalQuoteBoardAddress(reference, directories)).toBe('music-posting.eth');
+    expect(getExternalQuoteBoardLabel(reference, directories)).toBe('mu');
+  });
+
+  it('canonicalizes cross-board aliases through the directories list', () => {
+    const reference = {
+      boardIdentifier: 'music-posting.bso',
+      kind: 'cross-board' as const,
+      number: 77,
+      raw: '>>>/music-posting.bso/77',
+    };
+
+    expect(getExternalQuoteBoardAddress(reference, directories)).toBe('music-posting.eth');
+    expect(getExternalQuoteBoardLabel(reference, directories)).toBe('mu');
+  });
+});