test: improved unit test coverage

[gallayl]

🧪 Test Coverage Improvements

Adds unit test coverage for frontend components and services to improve code quality and prevent regressions.

✨ What's New

• Component Tests (391 lines)

  • Icon component with multiple icon type support
  • Separator component rendering
  • Error404 page display and messaging
  • ThemeSwitch component with theme provider integration

• Service Tests (1,472 lines)

  • DashboardService CRUD operations and caching
  • ErrorReporter GitHub issue creation
  • InstallService status checking
  • IotDevicesService device management and monitoring
  • LoggingService log entry management
  • MoviesService movie data operations
  • SeriesService series data operations

🎯 Coverage

• All service tests include cache behavior verification
• Observable pattern testing for reactive state
• Proper resource disposal with usingAsync
• Consistent mocking patterns across all tests

📊 Stats

• Files Changed: 11 new test files
• Lines Added: 1,863 lines
• Test Cases: ~80+ test cases

[codecov-commenter]

Codecov Report

❌ Patch coverage is 16.66667% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.07%. Comparing base (de29af6) to head (c455c4a).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
frontend/src/services/iot-devices-service.ts	16.66%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #103      +/-   ##
===========================================
+ Coverage    32.08%   37.07%   +4.98%     
===========================================
  Files          209      211       +2     
  Lines         3537     3555      +18     
  Branches       553      558       +5     
===========================================
+ Hits          1135     1318     +183     
+ Misses        2152     1990     -162     
+ Partials       250      247       -3     

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🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[codecov-commenter]

Bundle Report

Changes will increase total bundle size by 143 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
shades-showcase-app-esm	15.04MB	143 bytes (0.0%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: shades-showcase-app-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/index-*.js	143 bytes	481.58kB	0.03%

Files in assets/index-*.js:

• ./src/services/iot-devices-service.ts → Total Size: 6.2kB