feat(settings): add admin settings API routes

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

app/lib/auth.server.ts

@@ -0,0 +1,6 @@
+export async function requireAdmin(request: Request) {
+  // Simple fallback: check x-admin-token header vs ADMIN_TOKEN
+  const token = request.headers.get('x-admin-token');
+  if (process.env.ADMIN_TOKEN && token === process.env.ADMIN_TOKEN) return;
+  throw new Response('Unauthorized', { status: 401 });
+}

app/routes/api/admin/__tests__/settings.api.test.ts

@@ -0,0 +1,8 @@
+import { settingsService } from '../../../lib/settings.server';
+
+test('settings API helper behavior', async () => {
+  const key = 'api_test_' + Date.now();
+  await settingsService.set(key, { foo: 'bar' }, 'test');
+  const v = await settingsService.get(key);
+  expect(v).toEqual({ foo: 'bar' });
+});

app/routes/api/admin/settings/[key].ts

@@ -0,0 +1,12 @@
+import type { ActionFunction } from '@remix-run/node';
+import { settingsService } from '~/lib/settings.server';
+import { requireAdmin } from '~/lib/auth.server';
+
+export const action: ActionFunction = async ({ request, params }) => {
+  await requireAdmin(request);
+  const key = params.key as string;
+  const body = await request.json();
+  if (!key) return new Response('Missing key', { status: 400 });
+  await settingsService.set(key, body.value, 'admin');
+  return new Response(null, { status: 204 });
+};

app/routes/api/admin/settings/index.ts

@@ -0,0 +1,23 @@
+import type { LoaderFunction, ActionFunction } from '@remix-run/node';
+import { json } from '@remix-run/node';
+import { settingsService } from '~/lib/settings.server';
+import { requireAdmin } from '~/lib/auth.server';
+
+export const loader: LoaderFunction = async ({ request }) => {
+  await requireAdmin(request);
+  await settingsService.init?.();
+  const entries: any[] = [];
+  // @ts-ignore access cache
+  for (const key of (settingsService as any).cache.keys()) {
+    entries.push({ key, value: await settingsService.get(key) });
+  }
+  return json(entries);
+};
+
+export const action: ActionFunction = async ({ request }) => {
+  await requireAdmin(request);
+  const body = await request.json();
+  if (!body || !body.key) return new Response('Missing key', { status: 400 });
+  const created = await settingsService.set(body.key, body.value, 'admin');
+  return new Response(JSON.stringify(created), { status: 201 });
+};