- Removed configurable tab width support and the `display.tabWidth` setting across all packages.
- Deleted obsolete utility functions `getIndentation`, `getIndentationNoescape`, and `setDefaultTabWidth`.
- Standardized tab expansion logic to use a fixed `DEFAULT_TAB_WIDTH` globally.
- Cleaned up related configuration schemas, test suites, and internal API signatures to remove path-dependency.
- Added `#disposed` flags and guards to `StatusLineComponent` to stop async callbacks running post-dispose.
- Updated `onThemeChange` to return an unsubscribe function and registered it in `InteractiveMode`.
- Fixed schema validation for `spinnerFramesSchema` to narrower types instead of dynamic or-validation.
- Resolved settings leaks by saving and restoring `tuiTight` state in tests.
- Added regression tests verifying that pending async microtasks do not trigger updates after disposal.
- Added a setup-system-deps action with preloaded-runner guards and apt fallbacks.
- Updated CI workflows to download Linux x64 native artifacts and gate on native job success.
- Renamed coding-agent fast mode to singleton in scripts and test partitioning logic.
- Added settings test-state begin/restore helpers with recursive cleanup in affected tests.