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/stores/__tests__/theme-store.test.ts

@@ -0,0 +1,72 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+const testState = vi.hoisted(() => ({
+  entriesMock: vi.fn(async () => [] as Array<['nsfw' | 'sfw', string]>),
+  setItemMock: vi.fn(async () => undefined),
+}));
+
+vi.mock('@bitsocialhq/bitsocial-react-hooks/dist/lib/localforage-lru/index.js', () => ({
+  default: {
+    createInstance: () => ({
+      entries: testState.entriesMock,
+      setItem: testState.setItemMock,
+    }),
+  },
+}));
+
+const waitFor = async (predicate: () => boolean) => {
+  for (let i = 0; i < 20; i += 1) {
+    await Promise.resolve();
+    if (predicate()) {
+      return;
+    }
+  }
+};
+
+describe('useThemeStore', () => {
+  beforeEach(() => {
+    vi.resetModules();
+    testState.entriesMock.mockReset();
+    testState.entriesMock.mockResolvedValue([]);
+    testState.setItemMock.mockReset();
+    testState.setItemMock.mockResolvedValue(undefined);
+  });
+
+  it('loads stored themes on initialization', async () => {
+    testState.entriesMock.mockResolvedValue([
+      ['nsfw', 'tomorrow'],
+      ['sfw', 'photon'],
+    ]);
+
+    const store = (await import('../use-theme-store')).default;
+    await waitFor(() => store.getState().themes.nsfw === 'tomorrow');
+
+    expect(store.getState().themes).toEqual({
+      nsfw: 'tomorrow',
+      sfw: 'photon',
+    });
+    expect(store.getState().currentTheme).toBeNull();
+  });
+
+  it('setTheme persists the updated theme and updates currentTheme', async () => {
+    const store = (await import('../use-theme-store')).default;
+    await waitFor(() => testState.entriesMock.mock.calls.length > 0);
+
+    await store.getState().setTheme('nsfw', 'photon');
+
+    expect(testState.setItemMock).toHaveBeenCalledWith('nsfw', 'photon');
+    expect(store.getState().themes.nsfw).toBe('photon');
+    expect(store.getState().currentTheme).toBe('photon');
+  });
+
+  it('getTheme can skip updating currentTheme when requested', async () => {
+    const store = (await import('../use-theme-store')).default;
+    await waitFor(() => testState.entriesMock.mock.calls.length > 0);
+
+    expect(store.getState().getTheme('sfw', false)).toBe('yotsuba-b');
+    expect(store.getState().currentTheme).toBeNull();
+
+    expect(store.getState().getTheme('sfw')).toBe('yotsuba-b');
+    expect(store.getState().currentTheme).toBe('yotsuba-b');
+  });
+});