test: add timezone boundary coverage for WallOfLove (JhaSourav07#3416)

## Description

Fixes JhaSourav07#2780 

Added `components/WallOfLove.timezone-boundaries.test.tsx` to improve
coverage for timezone-boundary equivalent scenarios in the WallOfLove
component.

### Changes made

* Added 5 boundary-focused test cases
* Verified reduced-motion rendering behavior
* Verified testimonial visibility and alignment across marquee rendering
* Verified statistics continuity rendering
* Verified avatar-to-author mapping integrity
* Verified testimonial content preservation across render boundaries

## Pillar

* [ ] 🎨 Pillar 1 — New Theme Design
* [ ] 📐 Pillar 2 — Geometric SVG Improvement
* [x] 🕐 Pillar 3 — Timezone Logic Optimization
* [ ] 🛠️ Other (Bug fix, refactoring, docs)

## Visual Preview

N/A (test-only change)

## Checklist before requesting a review:

* [x] I have read the `CONTRIBUTING.md` file.
* [x] I have tested these changes locally.
* [x] My commits follow the Conventional Commits format.
* [x] I have made sure that I have only one commit to merge in this PR.
* [ ] I have run `npm run format` and `npm run lint` locally and
resolved all errors.
* [ ] I have updated `README.md` if I added a new theme or URL
parameter.
* [ ] I have started the repo.
* [ ] The SVG output matches the CommitPulse premium quality aesthetic
standard.
* [x] (Recommended) I joined the CommitPulse Discord community for
contributor discussions, mentorship, and faster PR support.

Author: JhaSourav07

components/WallOfLove.timezone-boundaries.test.tsx

@@ -0,0 +1,84 @@
+import { render, screen } from '@testing-library/react';
+import '@testing-library/jest-dom/vitest';
+import { describe, expect, it, vi } from 'vitest';
+import { WallOfLove } from './WallOfLove';
+
+// Mock framer-motion
+vi.mock('framer-motion', () => ({
+  motion: {
+    p: (props: React.ComponentProps<'p'>) => <p {...props} />,
+  },
+  useReducedMotion: () => true,
+}));
+
+// Mock gsap
+vi.mock('gsap', () => {
+  const timeline = () => ({
+    to: vi.fn(),
+    fromTo: vi.fn(),
+    kill: vi.fn(),
+  });
+
+  return {
+    default: {
+      registerPlugin: vi.fn(),
+      context: (cb: () => void) => {
+        cb();
+        return { revert: vi.fn() };
+      },
+      timeline,
+      to: vi.fn(),
+      set: vi.fn(),
+    },
+  };
+});
+
+vi.mock('gsap/ScrollTrigger', () => ({
+  ScrollTrigger: {},
+}));
+
+describe('WallOfLove - Timezone Boundaries', () => {
+  it('Reduced Motion Boundary (UTC Equivalent): renders content when motion reduction is enabled', () => {
+    render(<WallOfLove />);
+
+    expect(screen.getByText('Happy Developers')).toBeInTheDocument();
+    expect(screen.getByText('Badges Generated')).toBeInTheDocument();
+    expect(screen.getByText('Average Rating')).toBeInTheDocument();
+  });
+
+  it('Visual Alignment Boundary (Calendar Date Alignment Equivalent): preserves testimonial visibility across marquee boundaries', () => {
+    render(<WallOfLove />);
+
+    expect(screen.getAllByText('Alex Chen').length).toBeGreaterThan(0);
+    expect(screen.getAllByText('Priya Sharma').length).toBeGreaterThan(0);
+    expect(screen.getAllByText('David Kim').length).toBeGreaterThan(0);
+  });
+
+  it('Stats Continuity Boundary (Leap Year Equivalent): renders all statistic values without gaps', () => {
+    render(<WallOfLove />);
+
+    expect(screen.getByText('2K+')).toBeInTheDocument();
+    expect(screen.getByText('50K+')).toBeInTheDocument();
+    expect(screen.getByText('4.9')).toBeInTheDocument();
+  });
+
+  it('Avatar Mapping Boundary (Timezone Offset Equivalent): preserves avatar-to-author associations', () => {
+    render(<WallOfLove />);
+
+    const avatar = screen.getAllByAltText('Alex Chen')[0];
+
+    expect(avatar).toBeInTheDocument();
+    expect(avatar).toHaveAttribute('src');
+    expect(avatar.getAttribute('src')).toContain('Alex');
+  });
+
+  it('Content Preservation Boundary (Calendar Grid Integrity Equivalent): preserves testimonial message content across render boundaries', () => {
+    render(<WallOfLove />);
+
+    const messages = screen.getAllByText(
+      /Just added CommitPulse to my GitHub README and the 3D monolith looks absolutely insane/i
+    );
+
+    expect(messages.length).toBeGreaterThan(0);
+  });
+});