Productionize project onboarding wizard

[simple-agent-manager]

Summary

Productionizes idea 01KTEQTH0E2VYRBP6MK3QK6HJ1 by replacing the flat /projects/new form with a guided 3-step onboarding wizard wired to real production endpoints.

• Step 1 creates GitHub-backed projects from live installations/repositories/branches and maps duplicate name, repository, and GitHub repo ID conflicts inline.
• Step 2 lets users optionally create conversation/task agent profiles and a cron-only trigger, using only configured agents from GET /api/agents.
• Step 3 starts either task or conversation kickoff through POST /api/projects/:projectId/tasks/submit, with graceful cloud-credential 403 handling.

Constraints Preserved

• DRAFT PR only. DO NOT MERGE.
• No product mocks; the wizard uses production API clients/endpoints.
• Skills are excluded from onboarding payloads and UI.
• Agent choices are filtered to configured === true.
• Trigger onboarding is cron-only, requires cronExpression, and handles per-project trigger-name 409s.
• githubCliPolicy is omitted for inherited/default policy and sent only with the exact custom schema.
• Branch copy does not claim the default branch stays untouched.
• The throwaway /prototype/project-onboarding route/directory is absent from the current tree.

Validation

• pnpm --filter @simple-agent-manager/web typecheck passed.
• pnpm --filter @simple-agent-manager/web test -- tests/unit/components/project-onboarding-wizard.test.tsx passed.
• pnpm --filter @simple-agent-manager/web lint passed with existing repo warnings.
• pnpm lint passed with existing repo warnings.
• pnpm typecheck passed.
• pnpm build passed.
• Playwright visual audit passed at 375px and 1280px:
  npx playwright test tests/playwright/project-create-artifacts-audit.spec.ts --project="iPhone SE (375x667)" --project="Desktop (1280x800)"
• Staging deploy and smoke tests passed: https://github.com/raphaeltm/simple-agent-manager/actions/runs/27068216032
• Staging authenticated /projects/new rendered the wizard with no horizontal overflow.
• Staging create/kickoff verification created project 01KTEY73G24BJY922G2AT59TWW; POST /api/projects/:projectId/tasks/submit returned queued task 01KTEY75G1FHYW220Q49S93PNS.

Known Caveat

• Full pnpm test did not exit cleanly because of an unrelated order-dependent assertion in apps/web/tests/unit/pages/project-library.test.tsx: screen.getByText(/2 files/) matches both visible text and an sr-only live-region duplicate. The isolated rerun of that test passed.

[sonarqubecloud]

Quality Gate passed

Issues
12 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud