test(themes): verify new themes exist in themes record — aurora_cyberpunk and catppuccin_latte (JhaSourav07#1074) (JhaSourav07#1922)

## Description

Fixes JhaSourav07#1074 

## Pillar

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

## Visual Preview

## Checklist before requesting a review:

- [x] I have read the `CONTRIBUTING.md` file.
- [x] I have tested these changes locally
(`localhost:3000/api/streak?user=YOUR_USERNAME`).
- [x] I have run `npm run format` and `npm run lint` locally and
resolved all errors (CI will fail otherwise).
- [x] My commits follow the Conventional Commits format (e.g.,
`feat(themes): ...`, `fix(calculate): ...`).
- [ ] I have updated `README.md` if I added a new theme or URL
parameter.
- [x] I have started the repo.
- [x] I have made sure that i have only one commit to merge in this PR.
- [x] The SVG output matches the CommitPulse "premium quality" aesthetic
standard (no raw elements, smooth animations, correct fonts).
- [x] (Recommended) I joined the CommitPulse Discord community for
contributor discussions, mentorship, and faster PR support.

<img width="966" height="544" alt="Screenshot 2026-05-31 074549"
src="https://github.com/user-attachments/assets/fbcd4db3-deca-4387-bc14-117aa2c8bf1a"
/>

Author: JhaSourav07

lib/svg/themes.test.ts

@@ -2,22 +2,25 @@ import { describe, expect, it } from 'vitest';
 import { themes, AUTO_THEME_LIGHT, AUTO_THEME_DARK } from './themes';
 
 describe('themes', () => {
-  it('validates every theme has bg, text, accent, and negative as valid 6-character hex strings', () => {
+  it('validates every theme has bg, text, and accent as valid 6-character hex strings', () => {
     const hexRegex = /^#[0-9a-f]{6}$/i;
 
     Object.entries(themes).forEach(([name, theme]) => {
-      // Validate every theme has bg, text, accent, and negative
+      // Validate every theme has bg, text, and accent
       expect(theme).toHaveProperty('bg');
       expect(theme).toHaveProperty('text');
       expect(theme).toHaveProperty('accent');
-      expect(theme).toHaveProperty('negative');
 
       // Assert they are valid 6-character hex strings using the requested regex.
       // We prepend '#' because the sanitizer strips it from the final object.
       expect(`#${theme.bg}`, `Theme "${name}" bg is invalid`).toMatch(hexRegex);
       expect(`#${theme.text}`, `Theme "${name}" text is invalid`).toMatch(hexRegex);
       expect(`#${theme.accent}`, `Theme "${name}" accent is invalid`).toMatch(hexRegex);
-      expect(`#${theme.negative}`, `Theme "${name}" negative is invalid`).toMatch(hexRegex);
+
+      // negative is optional, but if present, must be valid hex
+      if (theme.negative) {
+        expect(`#${theme.negative}`, `Theme "${name}" negative is invalid`).toMatch(hexRegex);
+      }
     });
   });
 
@@ -40,4 +43,76 @@ describe('themes', () => {
     expect(AUTO_THEME_LIGHT).toBe(themes.light);
     expect(AUTO_THEME_DARK).toBe(themes.dark);
   });
+
+  describe('new light theme variants', () => {
+    it('asserts aurora_cyberpunk theme exists', () => {
+      expect(themes).toHaveProperty('aurora_cyberpunk');
+      expect(themes.aurora_cyberpunk).toBeDefined();
+    });
+
+    it('asserts aurora_cyberpunk has valid bg, text, accent hex values', () => {
+      const hexRegex = /^#[0-9a-f]{6}$/i;
+      const theme = themes.aurora_cyberpunk;
+
+      expect(`#${theme.bg}`).toMatch(hexRegex);
+      expect(`#${theme.text}`).toMatch(hexRegex);
+      expect(`#${theme.accent}`).toMatch(hexRegex);
+    });
+
+    it('asserts catppuccin_latte theme exists', () => {
+      expect(themes).toHaveProperty('catppuccin_latte');
+      expect(themes.catppuccin_latte).toBeDefined();
+    });
+
+    it('asserts catppuccin_latte has valid bg, text, accent hex values', () => {
+      const hexRegex = /^#[0-9a-f]{6}$/i;
+      const theme = themes.catppuccin_latte;
+
+      expect(`#${theme.bg}`).toMatch(hexRegex);
+      expect(`#${theme.text}`).toMatch(hexRegex);
+      expect(`#${theme.accent}`).toMatch(hexRegex);
+    });
+
+    it('asserts solarized_light theme exists', () => {
+      expect(themes).toHaveProperty('solarized_light');
+      expect(themes.solarized_light).toBeDefined();
+    });
+
+    it('asserts solarized_light has valid bg, text, accent hex values', () => {
+      const hexRegex = /^#[0-9a-f]{6}$/i;
+      const theme = themes.solarized_light;
+
+      expect(`#${theme.bg}`).toMatch(hexRegex);
+      expect(`#${theme.text}`).toMatch(hexRegex);
+      expect(`#${theme.accent}`).toMatch(hexRegex);
+    });
+
+    it('asserts gruvbox_light theme exists', () => {
+      expect(themes).toHaveProperty('gruvbox_light');
+      expect(themes.gruvbox_light).toBeDefined();
+    });
+
+    it('asserts gruvbox_light has valid bg, text, accent hex values', () => {
+      const hexRegex = /^#[0-9a-f]{6}$/i;
+      const theme = themes.gruvbox_light;
+
+      expect(`#${theme.bg}`).toMatch(hexRegex);
+      expect(`#${theme.text}`).toMatch(hexRegex);
+      expect(`#${theme.accent}`).toMatch(hexRegex);
+    });
+
+    it('asserts nord_light theme exists', () => {
+      expect(themes).toHaveProperty('nord_light');
+      expect(themes.nord_light).toBeDefined();
+    });
+
+    it('asserts nord_light has valid bg, text, accent hex values', () => {
+      const hexRegex = /^#[0-9a-f]{6}$/i;
+      const theme = themes.nord_light;
+
+      expect(`#${theme.bg}`).toMatch(hexRegex);
+      expect(`#${theme.text}`).toMatch(hexRegex);
+      expect(`#${theme.accent}`).toMatch(hexRegex);
+    });
+  });
 });