feat: change auth page color scheme to blue-based

[devin-ai-integration]

What does this PR do?

Updates the auth pages (login, setup wizard) to use a blue-based color scheme instead of the default dark/gray theme.

Changes:

• AuthContainer: Background → blue gradient (from-blue-50 to-blue-100), card border → border-blue-200, heading → text-blue-900
• Login page: Brand CSS custom properties updated to blue palette (#2563eb, #1e40af, etc.), sign-in button changed from secondary to primary
• Setup page: Background → same blue gradient as login
• WizardForm: Title and card border updated to blue tones
• Steps indicator: Active steps → bg-blue-600, inactive → bg-blue-200

All changes include dark mode variants.

Link to Devin run: https://partner-workshops.devinenterprise.com/sessions/142d3dd0cb6147a5904057961845a69b

Visual Demo

Image Demo:

Login page (after):

Setup page (after):

Video Demo:

Setup wizard flow:

View original video (rec-e508b70556f544d0bc6c28bf8349244d-edited.mp4)

Login page local test:

View original video (rec-49740a7aee064d1cb945d977ae6155d7-edited.mp4)

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. N/A — no doc changes needed.
• I confirm automated tests are in place that prove my fix is effective or that my feature works.

How should this be tested?

1. Run yarn dev and navigate to http://localhost:3000/auth/login (seeded DB) or /auth/setup?step=1 (fresh DB)
2. Verify the page background is a blue gradient (light: blue-50 → blue-100, dark: blue-950 → gray-900)
3. Verify card borders are blue-tinted
4. Verify step progress indicators are blue
5. Verify heading text is blue-900 in light mode
6. Verify the "Sign in" button on the login page is blue (primary color)
7. Toggle dark mode and verify dark mode variants render correctly

Human Review Checklist

⚠️ Important items to verify:

• Shared component impact: Steps.tsx and WizardForm.tsx live in packages/ui/ and are used across the entire app. The hardcoded blue colors will affect all wizard flows (onboarding, settings, etc.), not just auth pages. Confirm this is the intended scope — if not, these color changes should be scoped to auth-only wrappers.
• Design system consistency: The changes replace semantic design tokens (bg-inverted, text-emphasis, border-subtle) with hardcoded blue Tailwind classes. This breaks the design system's theming capabilities. Consider whether these should use CSS custom properties or design tokens for better maintainability and consistency.
• Import changes: Biome added import process from "node:process" to login-view.tsx (a "use client" component). Verify this doesn't cause issues in the client-side bundle — process.env is typically available in Next.js client components without explicit imports.
• Dark mode: Verify all dark mode variants (dark:bg-blue-950, dark:text-blue-100, etc.) render correctly across both login and setup pages.
• Login page: Verified locally with seeded database — blue gradient background, blue heading, blue primary button all render correctly.

Checklist

• I have read the contributing guide
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas (N/A - no complex logic)
• I have checked if my changes generate no new warnings (pre-existing warnings remain)

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[devin-ai-integration]

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[devin-ai-integration]

Devin Review found 1 potential issue.

View 3 additional findings in Devin Review.

[devin-ai-integration]

🔴 Importing node:process in a "use client" component may break the login page in the browser

The PR adds import process from "node:process" at line 3 of apps/web/modules/auth/login-view.tsx, which is a "use client" component (line 1). The node: protocol prefix is meant for Node.js built-in modules and is not available in browser environments.

Root Cause

Before this PR, the code already referenced process.env.NEXT_PUBLIC_DISABLE_SIGNUP at line 186, but that worked fine because Next.js automatically inlines NEXT_PUBLIC_* environment variables as literal string values at build time — no actual process object is needed at runtime in the browser.

By explicitly importing process from "node:process", the bundler is now asked to resolve and include the Node.js process built-in module in the client-side bundle. Depending on how webpack/turbopack handles the node: protocol prefix for client bundles, this could cause:

• A build-time error (module not found)
• A runtime error in the browser (missing module)

The only other usage of import process from "node:process" in the codebase is in apps/web/app/e2e/session-warmup/page.tsx, which is a server component (no "use client" directive), so that usage is correct.

Impact: If the bundler fails to resolve node:process for the client bundle, the entire login page would be broken — users would be unable to log in.

Suggested change

import process from "node:process";

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