fix(feeds): force infinite scroll on multiboards and canonicalize page URLs

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

@@ -0,0 +1,29 @@
+import { describe, it, expect } from 'vitest';
+import { normalizeMultiboardFeedPath } from '../route-utils';
+
+describe('normalizeMultiboardFeedPath', () => {
+  it('normalizes /all/3 -> /all', () => {
+    expect(normalizeMultiboardFeedPath('/all/3')).toBe('/all');
+  });
+
+  it('normalizes /all/1w/3 -> /all/1w', () => {
+    expect(normalizeMultiboardFeedPath('/all/1w/3')).toBe('/all/1w');
+  });
+
+  it('normalizes /subs/2/settings -> /subs/settings', () => {
+    expect(normalizeMultiboardFeedPath('/subs/2/settings')).toBe('/subs/settings');
+  });
+
+  it('normalizes /mod/catalog/4 -> /mod/catalog', () => {
+    expect(normalizeMultiboardFeedPath('/mod/catalog/4')).toBe('/mod/catalog');
+  });
+
+  it('leaves non-multiboard paths unchanged', () => {
+    expect(normalizeMultiboardFeedPath('/biz')).toBe('/biz');
+    expect(normalizeMultiboardFeedPath('/biz/3')).toBe('/biz/3');
+    expect(normalizeMultiboardFeedPath('/biz/1w/2')).toBe('/biz/1w/2');
+    expect(normalizeMultiboardFeedPath('/biz/catalog/4')).toBe('/biz/catalog/4');
+    expect(normalizeMultiboardFeedPath('/pending/0')).toBe('/pending/0');
+    expect(normalizeMultiboardFeedPath('/')).toBe('/');
+  });
+});