Ensure the jiggler config loads the defaults so they can be saved.
Ensure the file.Sync occurs before acknowledging save.
Also fixup the old KeyboardLayout to use en-US not en_US
* feat: add timezone support to jiggler and fix custom settings persistence
- Add timezone field to JigglerConfig with comprehensive IANA timezone list
- Fix custom settings not loading current values
- Remove business hours preset, add as examples in custom settings
- Improve error handling for invalid cron expressions
* fix: format jiggler.go with gofmt
* fix: add embedded timezone data and validation
- Import time/tzdata to embed timezone database in binary
- Add timezone validation in runJigglerCronTab() to gracefully fallback to UTC
- Add timezone to debug logging in rpcSetJigglerConfig
- Fixes 'unknown time zone' errors when system lacks timezone data
* refactor: add timezone field comments from jiggler options
* chore: move tzdata to backend
* refactor: fix JigglerSetting linting
- Adjusted useEffect dependency to include send function for better data fetching
- Modified layout classes for improved responsiveness and consistency
- Cleaned up code formatting for better readability
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Co-authored-by: Siyuan Miao <i@xswan.net>
