fix: address clawpatch findings

[Jercik]

Summary

• resolves all 12 clawpatch findings, including destination prompt gating, CLI test coupling, workflow duplication, and package-manager helper cleanup
• restores the fresh-checkout npm start -- --help path by rebuilding before the CLI stub imports dist/
• keeps app-opening failures isolated from completed worktree creation by settling per-app launch tasks
• adds focused regression coverage for dry-run/non-interactive destination handling, diverged-branch recovery messaging, and app launch failure semantics
• simplifies managed workflow configuration and validates the changed workflows with actionlint

Validation

• clawpatch status --json reports openFindings: 0
• clawpatch report --status open --json reports 0 findings
• git ls-files -z | xargs -0 pnpm exec oxfmt --check --config .oxfmtrc.json
• npx -y actionlint .github/workflows/commit-msg.yml .github/workflows/pr-review.yml
• npm start -- --help
• pnpm test src/cli/open-worktree-apps.test.ts
• pnpm run typecheck
• pnpm run lint
• pnpm test
• pnpm run knip
• pnpm run fta
• pnpm run build