- Added `markHandled` helper to prevent unhandled promise rejections in fire-and-forget browser tasks.
- Integrated `postmortem.markExpectedCleanupError` to distinguish between expected teardown aborts and actual runtime failures.
- Updated `runCmuxCode` and `WorkerCore` to propagate abort reasons via `ToolAbortError` cause chains.
- Modified `tab-protocol` and supervisor logic to signal expected cleanup states during tab release.
- Added test coverage for `ToolAbortError` wrapping and cause preservation.
- Converted class properties to TypeScript parameter properties across 51 files to reduce boilerplate code.
- Removed explicit field declarations and manual assignments in constructors by using TypeScript's parameter property syntax with access modifiers.
- Applied consistent pattern of declaring private readonly and public readonly properties directly in constructor parameters.
- Removed Prettier configuration files (.prettierignore and .prettierrc) and migrated formatting to Biome.
- Updated Biome configuration from version 2.3.11 to 2.3.12 and changed arrowParentheses rule from 'always' to 'asNeeded'.
- Pinned @biomejs/biome dependency to exact version 2.3.12 in package.json and bun.lock.
- Applied consistent arrow function formatting across 489 files by removing unnecessary parentheses around single parameters.
- Removed blank lines after comment blocks and reorganized imports for consistency across the codebase.
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