feat(admin-js): trend mini chart bars clickable via table date links

public/js/admin.js

@@ -153,6 +153,21 @@
             max = 1;
         }
 
+        // 渐进增强：从下方表格复用“日期→订单集合”链接口径（避免硬编码 URL 规则）。
+        var dateToHref = {};
+        try {
+            var links = document.querySelectorAll('[data-role="platform-order-trend-7d"] a.link');
+            links.forEach(function (a) {
+                var d = String((a.textContent || '')).trim();
+                if (!d) {
+                    return;
+                }
+                dateToHref[d] = String(a.getAttribute('href') || '');
+            });
+        } catch (e) {
+            dateToHref = {};
+        }
+
         // 清空（避免 SSR/重复执行污染）
         el.innerHTML = '';
 
@@ -160,11 +175,18 @@
             var paid = Number(p && p.paid_sum ? p.paid_sum : 0);
             var h = Math.round(Math.max(6, (paid / max) * 72));
 
-            var bar = document.createElement('div');
-            bar.className = 'adm-mini-chart-bar';
-            bar.style.height = h + 'px';
-
             var date = (p && p.date) ? String(p.date) : '';
+            var href = (date && dateToHref[date]) ? String(dateToHref[date]) : '';
+
+            var bar = document.createElement(href ? 'a' : 'div');
+            bar.className = 'adm-mini-chart-bar' + (href ? ' adm-mini-chart-bar-link' : '');
+            bar.style.height = h + 'px';
+            if (href) {
+                bar.setAttribute('href', href);
+                bar.setAttribute('role', 'link');
+                bar.setAttribute('aria-label', '进入当日订单集合：' + date);
+            }
+
             var countNum = Number(p && p.count != null ? p.count : 0);
             if (!isFinite(countNum) || countNum < 0) {
                 countNum = 0;