feat: add MCP creator screenshot metrics recognition

koc-portal/tests/rendered-html.test.mjs

@@ -92,7 +92,7 @@ test("keeps claiming minimal and backfill one-to-one", async () => {
   assert.match(page, /submit_creator_metrics/);
   assert.match(page, /creatorExposure/);
   assert.match(page, /creatorViews/);
-  assert.match(page, /截图仅用于运营核对，不再自动OCR/);
+  assert.match(page, /上传后自动识别曝光量和阅读量，识别失败可手动填写/);
   assert.match(page, /evidenceImageUrl/);
   assert.match(page, /params\.set\("v", evidenceKey\)/);
   assert.match(page, /evidenceImageUrl\(selected, "publish"\)/);
@@ -140,7 +140,7 @@ test("renders screenshot-only tasks with anonymous delegation and multi-image up
   assert.match(styles, /\.evidence-preview-button/);
 });
 
-test("shows D1 timestamps in Beijing time", () => {
+test("shows D1 and MySQL UTC timestamps in Beijing time", () => {
   const stored = "2026-07-29 05:36:00";
   assert.equal(parseStoredDate(stored).toISOString(), "2026-07-29T05:36:00.000Z");
   assert.match(formatShanghaiDate(stored, true), /07\/29.*13:36/);