test(portal): fix vitest config (jsdom + @/ alias)

[tofikwest]

What

Fixes two real gaps in the portal vitest config that was introduced in #3454 (CS-760), flagged by the cubic review on #3456.

• Add resolve.alias for @/* → ./src. The config had no alias mapping, so any test importing via @/... fails at module resolution. Both apps/app and apps/framework-editor configs already do this.
• Switch environment from node → jsdom. The include glob targets .jsx/.tsx component tests, which need DOM APIs (e.g. testing-library's render). Both sibling configs use jsdom; node-only tests still run fine under it.

Uses the hand-mapped-alias / no-plugin approach (like apps/framework-editor) to avoid the vite plugin type clash with Next's build-time typecheck on Vercel. Adds jsdom + vitest as portal devDependencies so resolution no longer relies on workspace hoisting.

What was NOT changed (and why)

The cubic review also flagged a P2 in auth-callback.ts — "invite recovery breaks after an OAuth error; the /auth redirect drops inviteCode." This is not a real bug. In the portal, inviteCode is never populated: LoginForm is rendered without it in (public)/auth/page.tsx, there is no /invite/[code] route, and nothing sets it — the /invite/${inviteCode} success path is itself unreachable. Preserving it through the error path would mean building a speculative invite flow that doesn't exist here, so it's intentionally left alone.

Verification

cd apps/portal && npx vitest run — 4/4 pass under jsdom. Separately verified a probe test importing via @/app/lib/... resolves correctly with the new alias (removed after verifying).

---

Summary by cubic

Fixes the portal vitest config by adding @/* alias resolution and switching the test environment to jsdom, so component tests import correctly and DOM APIs work. Follows up on CS-760 to match sibling app configs.

• Bug Fixes

  • Add @/* → ./src alias so @/... imports resolve in tests.
  • Use jsdom for JSX/TSX tests that need the DOM.
  • Mirror alias by hand; no Vite plugins to avoid Next/Vercel type clashes.

• Dependencies

  • Add jsdom and vitest to apps/portal devDependencies.

^{Written for commit 4239b2d. Summary will update on new commits.}

[vercel]

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Project	Deployment	Actions	Updated (UTC)
app	Ready	Preview, Comment	Jul 20, 2026 9:57pm
comp-framework-editor	Ready	Preview, Comment	Jul 20, 2026 9:57pm
portal	Ready	Preview, Comment	Jul 20, 2026 9:57pm

[cubic-dev-ai]

No issues found across 3 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}

[claudfuen]

🎉 This PR is included in version 3.104.2 🎉

The release is available on GitHub release

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