style(frontend): standardize semicolons across TS/JS configs and components (#4525)

# Description of Changes

- **What was changed**
- Added missing trailing semicolons across React components, utilities,
tests, and build/test configs to ensure consistent formatting.
- Normalized arrow-function assignments to end with semicolons (e.g.,
`const fn = () => { ... };`).
- Harmonized imports/exports and object literals in configuration files
to terminate statements with semicolons.
  - Updated test setup files and mocks to consistently use semicolons.

- **Why the change was made**
- Aligns the codebase with ESLint/Prettier conventions to prevent
auto-format churn and avoid ASI (automatic semicolon insertion) edge
cases.
- Improves readability and produces cleaner diffs in future
contributions.

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

---------

Co-authored-by: Reece Browne <[email protected]>

frontend/tailwind.config.js

@@ -63,11 +63,11 @@ module.exports = {
         background: 'rgb(var(--background) / <alpha-value>)',
         border: 'rgb(var(--border) / <alpha-value>)',
       },
-      
+
       // Z-index scale
       zIndex: {
         'dropdown': '1000',
-        'sticky': '1020', 
+        'sticky': '1020',
         'fixed': '1030',
         'modal-backdrop': '1040',
         'modal': '1050',
@@ -81,4 +81,4 @@ module.exports = {
   corePlugins: {
     preflight: true,
   },
-}
+};