Hide SITE_ADMIN from tenant admin, add Site Admin nav link

- Tenant admin user list filters out SITE_ADMIN users (server-side)
- API guard prevents tenant admins from modifying SITE_ADMIN users
- Tenant admins cannot change their own role (prevents self-demotion)
- Nav bar shows separate "Site Admin" link for SITE_ADMIN users
- Both desktop and mobile nav updated

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

src/routes/+layout.svelte

@@ -62,6 +62,14 @@
 						{/if}
 					</button>
 					{#if data.user}
+						{#if data.user.globalRole === 'SITE_ADMIN'}
+							<a
+								href="/admin/site"
+								class="rounded bg-white/20 px-3 py-1.5 text-sm text-white hover:bg-white/30 transition"
+							>
+								Site Admin
+							</a>
+						{/if}
 						{#if data.user.tenantRole === 'ADMIN' || data.user.globalRole === 'SITE_ADMIN'}
 							<a
 								href="/admin"
@@ -143,6 +151,15 @@
 					</div>
 					<div class="flex flex-col gap-1">
 						<a href="/account" class="text-white/80 text-sm py-1 hover:text-white transition" onclick={() => (mobileMenuOpen = false)}>{data.user.name}</a>
+						{#if data.user.globalRole === 'SITE_ADMIN'}
+							<a
+								href="/admin/site"
+								class="rounded bg-white/20 px-3 py-1.5 text-sm text-white hover:bg-white/30 transition text-center"
+								onclick={() => (mobileMenuOpen = false)}
+							>
+								Site Admin
+							</a>
+						{/if}
 						{#if data.user.tenantRole === 'ADMIN' || data.user.globalRole === 'SITE_ADMIN'}
 							<a
 								href="/admin"

src/routes/admin/+page.server.ts

@@ -11,13 +11,12 @@ export const load: PageServerLoad = async ({ locals }) => {
 	const { users, boards, tags, categories } = await withTenant(tenant.id, async (tx) => {
 		const [users, boards, tags, categories] = await Promise.all([
 			tx.user.findMany({
-				where: { tenantId: tenant.id },
+				where: { tenantId: tenant.id, globalRole: { not: 'SITE_ADMIN' } },
 				select: {
 					id: true,
 					name: true,
 					email: true,
 					tenantRole: true,
-					globalRole: true,
 					createdAt: true
 				},
 				orderBy: { createdAt: 'asc' }

src/routes/admin/+page.svelte

@@ -141,20 +141,21 @@
 						<tr class="hover:bg-gray-50 dark:hover:bg-gray-800">
 							<td class="px-4 py-3 font-medium text-gray-900 dark:text-gray-100">
 								{user.name}
-								{#if user.globalRole === 'SITE_ADMIN'}
-									<span class="ml-1 rounded bg-purple-100 px-1.5 py-0.5 text-[10px] font-semibold text-purple-700">SITE ADMIN</span>
-								{/if}
 							</td>
 							<td class="px-4 py-3 text-gray-600 dark:text-gray-400">{user.email}</td>
 							<td class="px-4 py-3">
-								<select
-									value={user.tenantRole}
-									onchange={(e) => changeRole(user.id, e.currentTarget.value)}
-									class="rounded border border-gray-300 dark:border-gray-600 dark:bg-gray-800 dark:text-gray-100 px-2 py-1 text-xs focus:border-[var(--color-primary)] focus:outline-none focus:ring-1 focus:ring-[var(--color-primary)]"
-								>
-									<option value="ADMIN">Admin</option>
-									<option value="MEMBER">Member</option>
-								</select>
+								{#if user.id === data.user?.id}
+									<span class="text-xs text-gray-500 dark:text-gray-400">{user.tenantRole === 'ADMIN' ? 'Admin' : 'Member'}</span>
+								{:else}
+									<select
+										value={user.tenantRole}
+										onchange={(e) => changeRole(user.id, e.currentTarget.value)}
+										class="rounded border border-gray-300 dark:border-gray-600 dark:bg-gray-800 dark:text-gray-100 px-2 py-1 text-xs focus:border-[var(--color-primary)] focus:outline-none focus:ring-1 focus:ring-[var(--color-primary)]"
+									>
+										<option value="ADMIN">Admin</option>
+										<option value="MEMBER">Member</option>
+									</select>
+								{/if}
 							</td>
 							<td class="px-4 py-3 text-gray-500 dark:text-gray-400">{formatDate(user.createdAt)}</td>
 						</tr>

src/routes/api/admin/users/[userId]/+server.ts

@@ -22,6 +22,11 @@ export const PATCH: RequestHandler = async ({ params, request, locals }) => {
 		});
 		if (!targetUser) throw error(404, 'User not found');
 
+		// Tenant admins cannot modify SITE_ADMIN users
+		if (targetUser.globalRole === 'SITE_ADMIN') {
+			throw error(403, 'Cannot modify a site admin');
+		}
+
 		// Prevent demoting the last tenant admin
 		if (targetUser.tenantRole === 'ADMIN' && result.data.tenantRole === 'MEMBER') {
 			const adminCount = await tx.user.count({