test: expand honest whole-repo coverage

Adds broad coverage across stores, hooks, and runtime utilities while switching `vitest.config.ts` to an explicit whole-repo include list. This turns the coverage report into a real repo-wide baseline instead of an imported-file subset.

src/hooks/__tests__/use-author-address-click.test.ts

@@ -0,0 +1,41 @@
+import { beforeEach, describe, expect, it } from 'vitest';
+import useAuthorAddressClick from '../use-author-address-click';
+
+describe('useAuthorAddressClick', () => {
+  beforeEach(() => {
+    document.body.innerHTML = '';
+  });
+
+  it('highlights matching author nodes except the op post and clears previous highlights', () => {
+    document.body.innerHTML = `
+      <span class="highlight" data-author-address="old" data-post-cid="post-1" data-cid="reply-old"></span>
+      <span data-author-address="0x1...3" data-post-cid="post-1" data-cid="post-1"></span>
+      <span data-author-address="0x1...3" data-post-cid="post-1" data-cid="reply-1"></span>
+      <span data-author-address="0x1...3" data-post-cid="post-1" data-cid="reply-2"></span>
+    `;
+
+    const handleUserAddressClick = useAuthorAddressClick();
+    handleUserAddressClick('0x1...3', 'post-1');
+
+    const matches = document.querySelectorAll('[data-author-address="0x1...3"][data-post-cid="post-1"]');
+    expect(matches[0].classList.contains('highlight')).toBe(false);
+    expect(matches[1].classList.contains('highlight')).toBe(true);
+    expect(matches[2].classList.contains('highlight')).toBe(true);
+    expect(document.querySelector('[data-author-address="old"]')?.classList.contains('highlight')).toBe(false);
+  });
+
+  it('toggles the highlight off when the same address is clicked again', () => {
+    document.body.innerHTML = `
+      <span data-author-address="0x1...3" data-post-cid="post-1" data-cid="reply-1"></span>
+      <span data-author-address="0x1...3" data-post-cid="post-1" data-cid="reply-2"></span>
+    `;
+
+    const handleUserAddressClick = useAuthorAddressClick();
+    handleUserAddressClick('0x1...3', 'post-1');
+    handleUserAddressClick('0x1...3', 'post-1');
+
+    const matches = document.querySelectorAll('[data-author-address="0x1...3"][data-post-cid="post-1"]');
+    expect(matches[0].classList.contains('highlight')).toBe(false);
+    expect(matches[1].classList.contains('highlight')).toBe(false);
+  });
+});