Create a per-user admin page to inspect users

Add page to allow admins to inspect all of the details stored on the
server of a user account.  For now this is just the UserDetails, but
in the future this is planned to be expanded to also show sessions
and logs.

server/api/users/[id]/details.get.ts

@@ -0,0 +1,34 @@
+import { z } from "zod/v4-mini";
+import { readUsers } from "~/server/database";
+import { serverUserToApiDetails } from "~/server/utils/user";
+
+const integerStringSchema = z.pipe(
+	z.string().check(z.regex(/^\d+/)),
+	z.transform(Number)
+);
+
+const detailsSchema = z.object({
+	id: integerStringSchema,
+});
+
+export default defineEventHandler(async (event) => {
+	await requireServerSessionWithAdmin(event);
+	const users = await readUsers();
+	const { success, error, data: params } = detailsSchema.safeParse(getRouterParams(event));
+	if (!success) {
+		throw createError({
+			status: 400,
+			statusText: "Bad Request",
+			message: z.prettifyError(error),
+		});
+	}
+	const user = users.find(user => user.id === params.id);
+	if (!user) {
+		throw createError({
+			statusCode: 404,
+			statusMessage: "Not found",
+		});
+	}
+
+	return serverUserToApiDetails(user);
+})