- Teach smoke-cloud-api to serve workspace bundle fixtures for packaged project
  validation scenarios
- Expand installer-smoke to seed a workspace fixture and verify packaged
  installer behavior against the prepared bundle scenario
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

- Extend shared IPC/DesktopApi types with per-project session listing and creation
- Add project store support for per-project sessions, active project metadata,
  and builtin home project descriptors
- Update preload bridge and desktop UI to show project switcher, project-scoped
  session lists, and per-project session actions
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

- Add project-workspace-agent-runner.js to asarUnpack so it runs outside
  the asar archive in packaged builds
- Use absolute Windows System32 PowerShell path in project-bundle and
  project-workspace-executor to avoid Git Bash path hijacking
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

- Extract workspace-startup.ts with buildChatSummary, shouldRetryBootstrapWarmup,
  isTransientLocalGatewayError and toStartupErrorMessage for unified startup state
- Converge index.ts and ipc.ts to use runtimeManager.getGatewayConnection() as
  truth source for bundled-runtime mode, preventing fallback to persisted 18789
- Add WINDOWS_POWERSHELL_PATH / WINDOWS_TASKKILL_PATH absolute paths in
  runtime-manager to fix Git Bash path hijacking on Windows
- Buffer last 50 stderr lines and surface name-conflict / port-in-use hints in
  lastError via buildStderrHint()
- Add smoke:workspace-startup script and workspace-startup-smoke test
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>