feat: 复盘报表视图与 CSV 导出（manager 专属）

app/api/task-report-export/route.ts

@@ -0,0 +1,29 @@
+import { adminForbidden, isAdminRequest } from "../../../lib/admin-auth";
+import { buildTaskReportCsv } from "../../../lib/task-report-csv";
+import {
+  ensureSchema,
+  getRawDb,
+  getTaskReportData,
+} from "../../../lib/mvp-db";
+
+export async function GET(request: Request) {
+  try {
+    if (!(await isAdminRequest(request))) return adminForbidden();
+    await ensureSchema();
+    const rows = await getTaskReportData(getRawDb());
+    const fileName = `任务复盘报表.csv`;
+    return new Response(buildTaskReportCsv(rows), {
+      headers: {
+        "Cache-Control": "private, no-store",
+        "Content-Type": "text/csv; charset=utf-8",
+        "Content-Disposition": `attachment; filename="koc-task-report.csv"; filename*=UTF-8''${encodeURIComponent(fileName)}`,
+        "X-Content-Type-Options": "nosniff",
+      },
+    });
+  } catch (error) {
+    return Response.json(
+      { error: error instanceof Error ? error.message : "导出失败" },
+      { status: 500 },
+    );
+  }
+}