diff --git a/db/migrations/004_n8n_ingestion.sql b/db/migrations/004_n8n_ingestion.sql
index 84b7920..dd5b894 100644
--- a/db/migrations/004_n8n_ingestion.sql
+++ b/db/migrations/004_n8n_ingestion.sql
@@ -105,7 +105,7 @@ BEGIN
         'published',
         'skipped'
     )
-    ON CONFLICT (report_date) DO UPDATE SET
+    ON CONFLICT ON CONSTRAINT uq_daily_reports_report_date DO UPDATE SET
         title = EXCLUDED.title,
         introduction = EXCLUDED.introduction,
         status = 'published',
@@ -123,7 +123,7 @@ BEGIN
         importance_score >= 85
     FROM news_articles
     WHERE id = v_article_id
-    ON CONFLICT (report_id, article_id) DO UPDATE SET
+    ON CONFLICT ON CONSTRAINT report_articles_pkey DO UPDATE SET
         section = EXCLUDED.section,
         display_order = EXCLUDED.display_order,
         is_highlight = EXCLUDED.is_highlight;
diff --git a/web/public/app.js b/web/public/app.js
index 2495e56..7a15f75 100644
--- a/web/public/app.js
+++ b/web/public/app.js
@@ -2,7 +2,13 @@ const $ = (selector) => document.querySelector(selector);
 const escapeHtml = (value) => String(value ?? '').replace(/[&<>'"]/g, (char) => ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', "'": '&#39;', '"': '&quot;' }[char]));
 const categoryNames = { general: '综合', ai_agent: 'AI 与 Agent', agri_hardware: '农业硬件', agri_solutions: '方案落地', agri_services: '农业服务', policy_market: '政策市场' };
 
-function today() { return new Date().toISOString().slice(0, 10); }
+function today() {
+  const now = new Date();
+  const year = now.getFullYear();
+  const month = String(now.getMonth() + 1).padStart(2, '0');
+  const day = String(now.getDate()).padStart(2, '0');
+  return `${year}-${month}-${day}`;
+}
 function formatDate(value) { return value ? new Intl.DateTimeFormat('zh-CN', { year: 'numeric', month: 'long', day: 'numeric', weekday: 'short' }).format(new Date(`${value}T00:00:00`)) : '—'; }
 function formatTime(value) { return value ? new Intl.DateTimeFormat('zh-CN', { month: 'short', day: 'numeric' }).format(new Date(value)) : '近期'; }