Kaj Kowalski 40452e100e Refactor: Extract testable functions and improve code organization ...

- Extract TokenUsage as named type (eliminates inline struct repetition)
- Refactor main() into testable functions:
  - readInputFromStdin: Read JSON from stdin
  - parseStatusInput: Validate and parse JSON
  - buildStatusLine: Construct left and right statusline parts
  - calculatePadding: Compute padding for alignment
  - formatOutput: Combine components into final output
- Add comprehensive tests for extracted functions
- Improve coverage from 45% to 71% (+26 percentage points)
- All new functions have 100% test coverage
- Clean linting with zero issues

2025-12-18 11:31:35 +01:00

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