Implement show emojis feature with clean data separation
- Updated ServiceConfig interface with separate emoji/name fields
- Modified buildDestinations() to accept showEmojis parameter
- Created shared options utility with caching
- Updated popup to load options and pass to buildDestinations
- Added comprehensive tests for emoji enabled/disabled scenarios
- All existing tests continue to pass (60 total)
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Co-Authored-By: Claude <noreply@anthropic.com>