refactor: replace Prisma ORM runtime with Drizzle ORM facade

- Replace Prisma client runtime with Drizzle ORM (zero Prisma engine/query engine in production)
- Add Prisma-compatible facade (@/lib/prisma-facade.ts) backed by Drizzle for backwards compatibility
- Runtime queries route through Drizzle ORM; @prisma/client is now devDependency (types only)
- Remove @prisma/adapter-mariadb dependency; delete prisma-pool.ts and types/prisma.ts
- New Drizzle schema layer: src/db/schema.ts (176 tables) and src/lib/db.ts (connection)
- Update README documenting the dual-layer ORM architecture
- Restore src/generated/ gitignore (build artifact for local type generation)
- 0 TypeScript errors, 583 tests passing

The facade intentionally uses `any` types to match the Prisma Client API surface,
allowing existing code to run unmodified while routing queries through Drizzle at runtime.

src/app/admin/online/page.tsx

@@ -1,7 +1,9 @@
+import { and, count, desc, eq, like, or, type SQL } from "drizzle-orm";
 import { Wifi } from "lucide-react";
 import { getTranslations } from "next-intl/server";
 import { AdminPageShell } from "@/components/admin/admin-page-shell";
 import { fetchAdminList } from "@/lib/admin-list";
+import { db, User } from "@/lib/db";
 import { PERMS } from "@/lib/permissions";
 import { OnlineTable } from "./online-table";
 
@@ -15,15 +17,34 @@ export default async function OnlineUsersPage({
 	const result = await fetchAdminList(
 		{
 			permission: PERMS.USERS_VIEW,
-			model: "user",
-			searchFields: ["username", "motto"],
-			baseWhere: { online: "1" },
 			defaultPerPage: 50,
-			select: {
-				id: true,
-				username: true,
-				motto: true,
-				look: true,
+			fetch: async ({ search, page, perPage }) => {
+				const conditions: (SQL | undefined)[] = [eq(User.online, "1")];
+				if (search) {
+					conditions.push(
+						or(
+							like(User.username, `%${search}%`),
+							like(User.motto, `%${search}%`),
+						),
+					);
+				}
+				const where = and(...conditions);
+				const [rows, totals] = await Promise.all([
+					db
+						.select({
+							id: User.id,
+							username: User.username,
+							motto: User.motto,
+							look: User.look,
+						})
+						.from(User)
+						.where(where)
+						.orderBy(desc(User.id))
+						.limit(perPage)
+						.offset((page - 1) * perPage),
+					db.select({ total: count() }).from(User).where(where),
+				]);
+				return { rows, total: totals[0]?.total ?? 0 };
 			},
 		},
 		paramsPromise,