feat: cross-origin session bridge between web and dashboard apps

[NehanAhmed]

Implements a token relay mechanism for sharing Supabase auth sessions across different origins (port 5173 web → port 5174 dashboard).

Flow:

1. Dashboard redirects to web login with ?redirectTo= param
2. After login (email/password or OAuth), web extracts session tokens
3. Web redirects to dashboard's /auth/callback#access_token=...&refresh_token=...&redirectTo=...
4. Dashboard AuthCallback calls supabase.auth.setSession() to persist tokens into dashboard's own localStorage
5. User is redirected to the intended page

Security:

• Tokens passed via URL fragment (never sent to servers)
• window.location.replace() prevents token URL from entering browser history
• Hash cleared immediately after extraction
• Referrer-Policy: no-referrer on dashboard index.html

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 065a57f2-e812-4564-8df2-1c5cb0c2a829

📥 Commits

Reviewing files that changed from the base of the PR and between 1389880 and ec7155a.

📒 Files selected for processing (7)

• apps/dashboard/index.html
• apps/dashboard/src/App.tsx
• apps/dashboard/src/hooks/use-auth.tsx
• apps/dashboard/src/pages/AuthCallback.tsx
• apps/web/src/hooks/use-auth.tsx
• apps/web/src/lib/config.ts
• apps/web/src/pages/AuthCallback.tsx

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/session-bridge

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