feat(阶段1): Hono 应用与题目列表接口，读通本地真实数据

apps/api/src/routes/problem.ts

@@ -0,0 +1,25 @@
+import { problemSummarySchema } from "@oj2/contract"
+import { desc } from "drizzle-orm"
+import { Hono } from "hono"
+
+import { db, schema } from "../db"
+
+export const problemRoutes = new Hono()
+
+problemRoutes.get("/problems", async (c) => {
+	const rows = await db
+		.select({
+			id: schema.problem.id,
+			_id: schema.problem.displayId,
+			title: schema.problem.title,
+			difficulty: schema.problem.difficulty,
+			submissionNumber: schema.problem.submissionNumber,
+			acceptedNumber: schema.problem.acceptedNumber,
+		})
+		.from(schema.problem)
+		.orderBy(desc(schema.problem.id))
+		.limit(20)
+
+	const data = rows.map((row) => problemSummarySchema.parse(row))
+	return c.json({ data })
+})