Add --json command-line flag to mo status that outputs system metrics
in JSON format without requiring a TTY environment.
This enables:
- Integration with GUI applications (e.g., native macOS apps)
- Use in automation scripts and monitoring systems
- Piping output to tools like jq for data extraction
- Recording metrics for analysis
Implementation:
- Add JSON struct tags to all metric types
- Add --json flag using Go's flag package
- Implement runJSONMode() for one-time metric collection
- Refactor main() to support both TUI and JSON modes
- Maintain 100% backward compatibility (default TUI unchanged)
Testing:
- All 454 existing tests pass
- JSON output validated with jq and python json.tool
- Pipeline and redirection work correctly
- No breaking changes to existing functionality
- Disable sensors data collection (CPU temp already shown in CPU card)
- Remove unused sensor-related functions (collectSensors, prettifyLabel, hasSensorData, renderSensorsCard)
- Remove unused gopsutil/sensors import
- Fix inline spinner disown call with explicit PID
- Update version from 1.22.0 to 1.22.1
- Update SECURITY_AUDIT.md to match new version and date
- Show all CPU cores instead of top 3 busiest
- Add P-CPU/E-CPU core grouping (Performance/Efficiency)
- Display GPU core count from system_profiler
- Add GPU usage meter via powermetrics (requires sudo)
- Show hint to run with sudo for GPU metrics
Tested on M2 Pro (6P + 4E cores, 16 GPU cores)
