chore(阶段3): 删除阶段 1 的临时验证物

GET /api/dev/problems、dev-problems.vue、对应路由项，以及只服务于它的
problemSummarySchema。阶段 1 用来验证「能从真实库读出一道题」，已完成使命。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/api/src/routes/problem.ts

@@ -3,7 +3,6 @@ import {
 	problemDetailSchema,
 	problemListItemSchema,
 	problemListSchema,
-	problemSummarySchema,
 	tagSchema,
 	yearlyAcSchema,
 } from "@oj2/contract"
@@ -228,25 +227,6 @@ problemRoutes.get("/problems/:displayId/yearly-ac", async (c) => {
 	return success(c, rows.map((row) => yearlyAcSchema.parse({ ...row, acRate: row.total > 0 ? Math.round(row.accepted / row.total * 10_000) / 100 : 0 })))
 })
 
-problemRoutes.get("/dev/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)
-		.where(and(eq(schema.problem.visible, true), isNull(schema.problem.contestId)))
-		.orderBy(desc(schema.problem.id))
-		.limit(20)
-
-	const data = rows.map((row) => problemSummarySchema.parse(row))
-	return success(c, data)
-})
-
 problemRoutes.get("/problems/:displayId", optionalAuth, async (c) => {
 	const [row] = await db
 		.select({