Add admin page that can edit users

Add admin page that's only accessible to admins with a listing of users
and the ability to edit the access types of those users.

server/api/admin/user.patch.ts

@@ -0,0 +1,79 @@
+import { readUsers, ServerUser, writeUsers } from "~/server/database";
+import { ApiUser, apiUserPatchSchema } from "~/shared/types/api";
+import { z } from "zod/v4-mini";
+import { broadcastEvent } from "~/server/streams";
+
+function serverUserToApi(user: ServerUser): ApiUser {
+	if (user.deleted) {
+		return {
+			id: user.id,
+			updatedAt: user.updatedAt,
+			deleted: true,
+		}
+	}
+	return {
+		id: user.id,
+		updatedAt: user.updatedAt,
+		type: user.type,
+		name: user.name,
+	};
+}
+
+export default defineEventHandler(async (event) => {
+	const session = await requireServerSession(event);
+	if (session.account.type !== "admin") {
+		throw createError({
+			statusCode: 403,
+			statusMessage: "Forbidden",
+		});
+	}
+	const { success, error, data: patch } = apiUserPatchSchema.safeParse(await readBody(event));
+	if (!success) {
+		throw createError({
+			status: 400,
+			statusText: "Bad Request",
+			message: z.prettifyError(error),
+		});
+	}
+
+	const users = await readUsers();
+	const user = users.find(user => user.id === patch.id);
+	if (!user || user.deleted) {
+		throw createError({
+			status: 409,
+			statusText: "Conflict",
+			message: "User does not exist",
+		});
+
+	}
+
+	if (patch.type) {
+		if (patch.type === "anonymous" || user.type === "anonymous") {
+			throw createError({
+				status: 409,
+				statusText: "Conflict",
+				message: "Anonymous user type cannot be changed.",
+			});
+		}
+		user.type = patch.type;
+	}
+	if (patch.name) {
+		if (user.type === "anonymous") {
+			throw createError({
+				status: 409,
+				statusText: "Conflict",
+				message: "Anonymous user cannot have name set.",
+			});
+		}
+		user.name = patch.name;
+	}
+	user.updatedAt = new Date().toISOString();
+	await writeUsers(users);
+	broadcastEvent({
+		type: "user-update",
+		data: serverUserToApi(user),
+	})
+
+	// Update Schedule counts.
+	await updateScheduleInterestedCounts(users);
+})