feat: 采集失败KOC补交截图闭环 + 任务中心分发详情弹窗

公开数据补交闭环（F1）：
- distributions 新增 public_metrics_screenshot_key（mysql/0022 迁移）
- KOC 门户：链接已回填但采集失败时展示补交数据截图入口（kind=public-metrics）
- 运营端：回收队列"核对补录"支持公开互动数据（赞/藏/评），按补交截图补录后采集状态置成功
- 企微催办：采集失败纳入待办（公开数据待补交）
- task-result-image 支持 kind=publish 输出发布截图

门户文案（F2）：
- 自动采集数据明确"由系统每天自动采集，无需你填写"，仅识别失败时才手动填写曝光/阅读

任务中心分发详情：
- 任务中心/数据回收的分发表行可点击，弹窗查看详情
- 详情按任务类型适配：发布阶段/数据回收（自动采集）/创作者数据（第7天）/截图回收四区块三段式布局

app/api/creator-screenshot/route.ts

@@ -10,20 +10,33 @@ export async function GET(request: Request) {
   const isAdmin = await isAdminRequest(request);
   try {
     await ensureSchema();
-    const distributionId = new URL(request.url).searchParams
-      .get("distribution")
-      ?.trim();
+    const url = new URL(request.url);
+    const distributionId = url.searchParams.get("distribution")?.trim();
+    // kind=public-metrics 时返回 KOC 补交的公开数据截图（仅后台核对用）
+    const imageKind = url.searchParams.get("kind") === "public-metrics"
+      ? "public-metrics"
+      : "creator";
     if (!distributionId) {
       return Response.json({ error: "缺少分发记录" }, { status: 400 });
     }
     const row = await getRawDb()
       .prepare(
-        `SELECT screenshot_key FROM distributions
+        `SELECT screenshot_key, public_metrics_screenshot_key FROM distributions
          WHERE id = ?`,
       )
       .bind(distributionId)
-      .first<{ screenshot_key: string | null }>();
-    const mcpToken = new URL(request.url).searchParams.get("mcp_token") || "";
+      .first<{
+        screenshot_key: string | null;
+        public_metrics_screenshot_key: string | null;
+      }>();
+    const mcpToken = url.searchParams.get("mcp_token") || "";
+    const key =
+      imageKind === "public-metrics"
+        ? row?.public_metrics_screenshot_key ?? null
+        : row?.screenshot_key ?? null;
+    if (imageKind === "public-metrics" && !isAdmin) {
+      return adminForbidden();
+    }
     if (
       !isAdmin &&
       (!row?.screenshot_key ||
@@ -36,18 +49,20 @@ export async function GET(request: Request) {
       return adminForbidden();
     }
     if (
-      !row?.screenshot_key ||
-      !row.screenshot_key.startsWith("creator-center/")
+      !key ||
+      !key.startsWith(
+        imageKind === "public-metrics" ? "public-metrics/" : "creator-center/",
+      )
     ) {
-      return Response.json({ error: "创作者截图不存在" }, { status: 404 });
+      return Response.json({ error: "截图不存在" }, { status: 404 });
     }
-    const object = await getUploadBucket().get(row.screenshot_key);
+    const object = await getUploadBucket().get(key);
     if (!object) {
-      return Response.json({ error: "创作者截图不存在" }, { status: 404 });
+      return Response.json({ error: "截图不存在" }, { status: 404 });
     }
     const headers = new Headers({
       "Cache-Control": "private, no-store",
-      "Content-Disposition": 'inline; filename="creator-center-screenshot"',
+      "Content-Disposition": `inline; filename="${imageKind}-screenshot"`,
       "X-Content-Type-Options": "nosniff",
     });
     object.writeHttpMetadata(headers);