Move the frontend to @clerk/react (Clerk Core 3)

[jayypatel18]

The API side already uses @clerk/backend 3, but the frontend is still on @clerk/clerk-react 5, which is the Clerk Core 2 package. Clerk renamed it to @clerk/react in Core 3, and their schedule ends long term support for Core 2 in January 2027. This brings the frontend onto the same generation as the API.

• Upgrade guide: https://clerk.com/docs/guides/development/upgrading/upgrade-guides/core-3
• Versioning and support schedule: https://clerk.com/docs/guides/development/upgrading/versioning

What changed

• package.json, pnpm-lock.yaml: @clerk/clerk-react ^5.61.9 replaced by @clerk/react ^6.0.0 (resolves to 6.17.4).
• src/app/main.tsx: the dynamic import now loads @clerk/react. On ClerkProvider, afterSignInUrl and afterSignUpUrl were removed in Core 3; they become signInFallbackRedirectUrl and signUpFallbackRedirectUrl, same /#/ value.
• src/features/auth/AccountButton.tsx, AuthBridge.tsx, UpgradeModal.tsx: import path only.
• src/features/auth/clerkAppearance.ts: Core 3 renamed five appearance variables. colorText is now colorForeground, colorTextSecondary is colorMutedForeground, colorInputText is colorInputForeground, colorInputBackground is colorInput, colorTextOnPrimaryBackground is colorPrimaryForeground. Values are unchanged. Without this the sign-in modal would stop picking up the app's theme tokens, and TypeScript would not complain because the object is not typed as Appearance.

What I checked

In a clean Node 22 container with pnpm 11, on main and then on this branch, with install scripts off. These are the steps in ci.yml:

Step	main	this branch
pnpm install --frozen-lockfile	ok	ok
pnpm test	204 passed in 10 files	204 passed in 10 files
pnpm run typecheck (non-blocking in CI)	64 errors	the same 64 errors
pnpm run build:local	ok	ok

None of the 64 existing type errors are in files this PR touches (they are in the dashboard, media, weather, settings and RSS code).

Not checked: I did not sign in against a real Clerk instance, so the themed sign-in modal is the thing to eyeball. Nothing under .agents/ was touched.

[vercel]

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[jayypatel18]

Hi Tim,

A gentle follow up on this PR. It upgrades your clerk package to the latest supported package before EOL Jan, 2027 of current package.

Once you get time kindly take a look at this PR, your time is much appreciated!

Thanks,
Jay