admin) User management admin page (#35)

Reviewed-on: #35
Reviewed-by: shaun <shaun@campbellwireless.net>
Co-authored-by: AI Agent <ai-agent@campbellwireless.net>
Co-committed-by: AI Agent <ai-agent@campbellwireless.net>

src/auth.ts

@@ -1,5 +1,6 @@
 import { SvelteKitAuth } from '@auth/sveltekit';
 import { env } from '$env/dynamic/private';
+import { upsertUserFromAuth } from '$lib/server/users.js';
 
 export const { handle, signIn, signOut } = SvelteKitAuth({
 	providers: [
@@ -23,7 +24,25 @@ export const { handle, signIn, signOut } = SvelteKitAuth({
 	trustHost: true,
 	callbacks: {
 		jwt({ token, profile }) {
-			if (profile?.sub) token.sub = profile.sub as string;
+			const details = profile as
+				| {
+						sub?: string;
+						name?: string;
+						email?: string;
+						username?: string;
+						preferred_username?: string;
+					}
+				| undefined;
+			if (details?.sub) {
+				token.sub = details.sub as string;
+				upsertUserFromAuth({
+					id: details.sub,
+					username: details.username ?? details.preferred_username ?? details.name,
+					fullName: details.name ?? details.username ?? details.preferred_username,
+					email: details.email,
+					authSource: 'OIDC - Synology'
+				});
+			}
 			return token;
 		},
 		session({ session, token }) {