Duplicate Code: URL Launching Logic in AboutPage

*Analysis of commit eaf30eabe62f9b178466629c6d3a4c4390e17311*

## Summary

URL launching logic with identical error handling is duplicated between `AboutPage` widget and `LinkService` class. The `AboutPage` directly implements URL launching instead of using the existing `LinkService`, leading to code duplication and inconsistent service usage patterns.

## Duplication Details

### Pattern: Direct URL Launching vs LinkService
- **Severity**: Medium
- **Occurrences**: 2 instances
- **Locations**:
- `lib/ui/pages/about.dart` (lines 77-81)
- `lib/services/link.dart` (lines 7-11)
- **Code Sample**:

In `lib/ui/pages/about.dart:77-81`:
``````dart
if (await canLaunchUrl(Uri.parse(url!))) {
await launchUrl(Uri.parse(url));
} else {
throw 'Could not launch $url';
}
``````

In `lib/services/link.dart:7-11`:
``````dart
if (await canLaunchUrlString(link)) {
await launchUrlString(link);
} else {
throw 'Could not launch $link';
}
``````

## Impact Analysis

- **Maintainability**: Changes to URL launching logic need to be made in multiple places, increasing the risk of inconsistencies
- **Bug Risk**: If a bug fix is applied to `LinkService`, the same bug may still exist in `AboutPage` unless both locations are updated
- **Code Bloat**: 11 lines of duplicated logic that could be consolidated
- **Inconsistency**: Other pages (`MorePage`, `IssueDetailPage`) correctly use `LinkService.launchLink()`, but `AboutPage` implements its own version

## Refactoring Recommendations

1. **Refactor AboutPage to use LinkService**
- Update `lib/ui/pages/about.dart` to use the existing `LinkService.launchLink()` method
- Estimated effort: Low complexity (15-30 minutes)
- Benefits:
- Eliminates code duplication
- Ensures consistent URL launching behavior across the app
- Centralizes error handling in one location
- Makes AboutPage consistent with other pages (MorePage, IssueDetailPage)

2. **Implementation approach**:
- Inject `LinkService` via Riverpod provider (already available as `linkServiceProvider`)
- Replace the inline URL launching logic with `ref.read(linkServiceProvider).launchLink(url)`
- Remove the duplicate error handling code

## Implementation Checklist

- [ ] Review duplication findings
- [ ] Update `AboutPage` to inject and use `linkServiceProvider`
- [ ] Replace inline URL launching logic with `LinkService.launchLink()` calls
- [ ] Verify all contact info links still work correctly
- [ ] Ensure consistent error handling across the app
- [ ] Run tests to verify no functionality broken

## Analysis Metadata

- **Analyzed Files**: 33 .dart files
- **Detection Method**: Pattern matching and code structure analysis
- **Commit**: eaf30eabe62f9b178466629c6d3a4c4390e17311
- **Analysis Date**: 2026-02-25

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