fix: restore test suite, CI and repo hygiene lost in 78edd57

[FranGuh]

Summary

• Restores the entire testing/CI layer accidentally deleted by commit 78edd57 ("feat: UX/UI polish"): 72 tests, vitest config, GitHub Actions workflow, husky pre-commit hook, Phase 2 planning doc and conductor track docs
• Fixes repo hygiene: UTF-16-corrupted .gitignore entry (which caused coverage/ to be tracked), dual-lockfile conflict (npm + pnpm)
• Consolidates tooling on pnpm end to end (CI, pre-commit, docs, README)

Changes

Area	Change
src/__tests__/	4 test files + setup restored; minimal drift fixes so tests match current UI (no source code touched)
vitest.config.js	Restored (jsdom env, setup file, globals)
.github/workflows/ci.yml	Restored and converted npm → pnpm (pnpm/action-setup@v4, frozen lockfile)
.husky/pre-commit	Restored; now pnpm exec lint-staged
package.json	Re-added prepare script, husky + lint-staged devDeps; added packageManager; dropped deprecated git add from lint-staged
.gitignore	Rewritten as clean UTF-8 (was UTF-16-corrupted); coverage/ and package-lock.json now ignored
coverage/	Untracked and removed (stale report from deleted tests)
package-lock.json	Deleted — pnpm is the single package manager
README.md	CI badge added; install instructions npm → pnpm
docs/, conductor/	Phase 2 plan + track docs restored; commands updated to pnpm

Test Plan

• pnpm run test — 71 passed, 1 todo, 0 failed
• pnpm run build — success
• pnpm run lint — clean
• Pre-commit hook verified live (ran on this PR's commit)

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
computer-selector-helper	Ready	Preview, Comment	Jun 11, 2026 5:19am