feat: 支持批量生图

Co-authored-by: Copilot <copilot@github.com>

server/api/images/plaza/[id].get.ts

@@ -0,0 +1,79 @@
+// server/api/images/plaza/[id].get.ts - 广场公开详情接口：返回单个公开批次中可展示的全部公开图片。
+import type { IPlazaPostDetail } from "#shared/types/openai";
+import {
+  createApiLogger,
+  createErrorResponse,
+  createSuccessResponse,
+  createUpstreamErrorResponse,
+  getPlazaPostDetail,
+  toSafeLogError
+} from "~~/server/utils";
+
+/**
+ * GET /api/images/plaza/:id
+ *
+ * 流程：
+ * 1. 校验路由参数 id 必须是数字。
+ * 2. 只返回 PUBLIC、批次未删除、图片已归档成功的公开详情。
+ * 3. 不返回上游响应、图床响应或内部错误详情。
+ */
+export default defineEventHandler(async (event) => {
+  const logger = createApiLogger("images.plaza.detail");
+  logger.info("开始");
+
+  try {
+    const postId = parseRecordId(getRouterParam(event, "id"));
+
+    logger.info("查询参数", {
+      postId: postId.toString()
+    });
+
+    const result = await getPlazaPostDetail(postId);
+    if (!result) {
+      logger.warn("公开记录不存在", {
+        postId: postId.toString()
+      });
+      return createErrorResponse(404, "公开记录不存在");
+    }
+
+    logger.done("成功", {
+      postId: postId.toString(),
+      imageCount: result.images.length
+    });
+
+    return createSuccessResponse<IPlazaPostDetail>(
+      result,
+      "获取广场图片详情成功"
+    );
+  } catch (error) {
+    if (isBadRequestError(error)) {
+      return createErrorResponse(400, "公开记录 ID 不正确");
+    }
+
+    logger.error("失败", {
+      error: toSafeLogError(error)
+    });
+    return createUpstreamErrorResponse(error, "获取广场图片详情失败");
+  }
+});
+
+/** 校验并解析路由里的记录 ID */
+const parseRecordId = (value: string | undefined): bigint => {
+  if (!value || !/^\d+$/.test(value)) {
+    throw createError({
+      statusCode: 400,
+      statusMessage: "公开记录 ID 不正确"
+    });
+  }
+
+  return BigInt(value);
+};
+
+const isBadRequestError = (error: unknown): boolean => {
+  return (
+    typeof error === "object" &&
+    error !== null &&
+    "statusCode" in error &&
+    error.statusCode === 400
+  );
+};