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## Summary
Improves reliability and correctness of `bin/` maintenance scripts used for local development and CI.
## Behavioral fixes
- **Exit codes**: `test_integration.js` exits with code 1 when `--suite` names an unknown suite; `test_unit.js` uses a non-zero fallback (`-1`) when the coverage or mocha child process has no status; `esbuild_all.mjs` exits non-zero if any parallel esbuild child fails.
- **Repo root**: `setup-full.mjs` resolves the repository root one directory above `bin/` (was incorrectly using `bin/` as root).
- **esbuild_all**: Propagates child build failures instead of always exiting 0.
- **Integration suites**: When `--suite` is omitted, all configured Playwright suites (core + addons) run; when provided, only the matching suite runs.
- **test_unit.js**: Declares the `files` filter variable so file arguments from `npm run test-unit` work without a ReferenceError.
- **test_mousemodes.js**: Uses the correct cursor-home CSI (`ESC [ H`) when clearing the menu screen.
- **Cleanup**: Removes debug logging from the test-unit coverage path; adds a missing semicolon after the suite regex match.
## Affected scripts
- `bin/test_integration.js`
- `bin/test_unit.js`
- `bin/esbuild_all.mjs`
- `bin/setup-full.mjs`
- `bin/test_mousemodes.js`
## Testing
- Syntax-checked affected scripts with `node --check`
- Verified `node bin/test_integration.js --suite=unknown` exits 1 with an error message
- `npm run lint-changes` (no TypeScript files changed)
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Daniel Imms
Jörg Breitbart
