refactor(router): guards AdminLayout + ImportPage → RequireRole wrapper (Etapa 6A)

- Crea RequireRole component (Approach B — router sin auth context)
- AdminLayout: elimina useEffect + spinner + null check, usa <RequireRole roles={['platform_admin']}>
- ImportPage: elimina useEffect guard + return null client_viewer, usa <RequireRole roles={['platform_admin','member','client_editor']}>

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

supabase/functions/list-users/index.ts

@@ -0,0 +1,74 @@
+/**
+ * Edge Function: list-users
+ * Propósito: devuelve usuarios de public.users con email de auth.users (requiere service_role).
+ * Solo accesible por platform_admin.
+ * Deploy: supabase functions deploy list-users
+ */
+
+import { createClient } from 'https://esm.sh/@supabase/supabase-js@2'
+
+Deno.serve(async (req: Request) => {
+  const headers = {
+    'Content-Type': 'application/json',
+    'Access-Control-Allow-Origin': '*',
+    'Access-Control-Allow-Methods': 'POST, GET, OPTIONS',
+    'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey, content-type',
+  }
+
+  if (req.method === 'OPTIONS') {
+    return new Response('ok', { headers })
+  }
+
+  const adminClient = createClient(
+    Deno.env.get('SUPABASE_URL')!,
+    Deno.env.get('SUPABASE_SERVICE_ROLE_KEY')!,
+  )
+
+  // ── 1. Autenticar al llamador ──────────────────────────────────────────────
+
+  const callerToken = req.headers.get('Authorization')?.replace('Bearer ', '')
+  if (!callerToken) {
+    return new Response(JSON.stringify({ error: 'Authorization header requerido' }), { status: 401, headers })
+  }
+
+  const { data: { user: caller }, error: authError } = await adminClient.auth.getUser(callerToken)
+  if (authError || !caller) {
+    return new Response(JSON.stringify({ error: 'Token inválido o expirado' }), { status: 401, headers })
+  }
+
+  const { data: callerProfile, error: profileError } = await adminClient
+    .from('users')
+    .select('platform_role')
+    .eq('id', caller.id)
+    .single()
+
+  if (profileError || callerProfile?.platform_role !== 'platform_admin') {
+    return new Response(
+      JSON.stringify({ error: 'Forbidden: solo platform_admin puede listar usuarios con email' }),
+      { status: 403, headers },
+    )
+  }
+
+  // ── 2. Obtener emails de auth.users ───────────────────────────────────────
+
+  const { data: authData, error: listError } = await adminClient.auth.admin.listUsers({
+    page: 1,
+    perPage: 1000,
+  })
+
+  if (listError) {
+    return new Response(
+      JSON.stringify({ error: `Error al listar usuarios: ${listError.message}` }),
+      { status: 500, headers },
+    )
+  }
+
+  // ── 3. Devolver mapa id → email ───────────────────────────────────────────
+
+  const result = (authData?.users ?? []).map((u) => ({
+    id: u.id,
+    email: u.email ?? null,
+  }))
+
+  return new Response(JSON.stringify(result), { status: 200, headers })
+})