Fix validation, middleware, and client typing regressions

[Copilot]

The repo had a mix of failing backend schema checks, broken middleware exports, and a few high-signal client lint/type regressions. The affected paths now align with the expected constraints and runtime behavior again.

• Backend validation

  • Tightened profile/sponsor/resource URL validation to reject non-web schemes consistently.
  • Enforced the expected skills limit and UUID validation on leaderboard inputs.
  • Adjusted sponsor tier messaging to match the schema contract used by tests.

• Middleware

  • Restored a callable middleware export for CORS handling.
  • Kept Clerk-compatible request flow while ensuring the CORS response shape is stable for preflight and standard requests.

• Supabase client surface

  • Added the missing backend/lib/supabase index module with the server/client helpers expected by consumers and tests.
  • Preserved error normalization for query execution.

• Client cleanup

  • Removed any from the touched auth/API paths.
  • Replaced empty catch blocks and untyped action payloads in the mentorship UI.
  • Fixed the hook dependency issue in the mentor panel.

Example:

export const profileUpdateSchema = z.object({
  github_url: z.string().regex(/^https?:\/\/.+/i, 'GitHub URL must be a valid URL').optional().or(z.literal('')),
  skills: z.array(z.string()).max(10, 'Cannot have more than 10 skills').optional(),
})

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Project	Deployment	Actions	Updated (UTC)
aryansondharva	Ready	Preview, Comment	May 28, 2026 5:11am
tech-assassin	Ready	Preview, Comment	May 28, 2026 5:11am