Persist Plutonium keys by server ID and add key management

src/routes/api/server-keys/+server.ts

@@ -0,0 +1,22 @@
+import { json } from '@sveltejs/kit';
+import { listServerKeys, saveServerKey, removeServerKey, validServerId } from '$lib/server/fleet/server-keys.js';
+
+export function GET() {
+    return json({ keys: listServerKeys() }, { headers: { 'Cache-Control': 'no-store' } });
+}
+
+export async function PUT({ request }: { request: Request }) {
+    const body = await request.json().catch(() => null);
+    try {
+        saveServerKey(body?.serverId, body?.plutoKey);
+        return json({ ok: true });
+    } catch (err) {
+        return json({ ok: false, error: (err as Error).message }, { status: 400 });
+    }
+}
+
+export async function DELETE({ request }: { request: Request }) {
+    const body = await request.json().catch(() => null);
+    if (!validServerId(body?.serverId)) return json({ error: 'Invalid server ID' }, { status: 400 });
+    return json({ ok: removeServerKey(body.serverId) });
+}