Add providers management page

[vontell]

Problem

The map credits organizations beneath a resource via ProvidedBy, which reads the providers table — but there's no way to manage that list. Adding, editing, or removing a provider means editing rows directly in Supabase. Production has just 2 provider rows today, one a leftover "Test Provider" with no logo.

Solution

Adds a /providers page to the admin dashboard:

• List — logo, name, website, and a count of how many resources each provider is attributed to
• Add / Edit — name (required), website URL, logo URL
• Remove — with a warning when the provider is still attributed to resources

Files:

• app/types/Provider.ts — Provider / ProviderInput types
• app/api/providers/methods.ts — CRUD client + per-provider resource counts
• app/routes/authenticated/providers/index.tsx — page, dialogs, and action
• Sidebar nav entry + route wiring

Also included: an RLS migration

providers has RLS enabled with no write policy, so inserts fail with 42501: new row violates row-level security policy — even for a signed-in user. supabase/migrations/20260722010000_providers_rls.sql grants insert/update/delete to authenticated and keeps reads public, since phlask-map fetches providers with the anon key.

This migration must be applied for the page's save actions to work.

Screenshots

Providers list, with live production data:

Add provider dialog:

Reference

Closes #39.

Checklist

• Changes have been tested locally
• Changes have been self-reviewed

Testing notes

pnpm run typecheck and biome check both pass. The pages above were captured running against the live Supabase project.

Two honest caveats:

• Screenshots were taken with the auth middleware temporarily bypassed locally (signups are disabled on the project, so I had no account to sign in with). That bypass was reverted and is not part of this diff — only the real authMiddleware is committed.
• Because the RLS policy isn't applied yet, a successful create/update/delete has not been exercised end to end. The read path, dialogs, validation, and error handling are verified; the write path needs the migration applied plus a manual pass by someone with an account.

🤖 Generated with Claude Code

https://claude.ai/code/session_01DQCnNexihkvzxUYee3NUa1

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