ui: 持仓监控卡片与关键位同宽，完善多端与 PWA

改用 split-grid 全宽布局；手机/平板/电脑断点适配；更新 manifest 与 Service Worker 支持安装为 App。

Co-authored-by: Cursor <cursoragent@cursor.com>

static/css/responsive.css

@@ -176,6 +176,18 @@ body {
         grid-template-columns: 1fr;
     }
 
+    .trade-split .card {
+        min-height: auto;
+    }
+
+    .trade-form-line.line-3 {
+        grid-template-columns: 1fr 1fr;
+    }
+
+    .trade-form-line.line-3 .trade-field:first-child {
+        grid-column: 1 / -1;
+    }
+
     .form-compact .line-4,
     .form-compact .line-5 {
         grid-template-columns: repeat(2, 1fr);
@@ -314,6 +326,24 @@ body {
         min-height: auto;
     }
 
+    .trade-split .card {
+        min-height: auto;
+    }
+
+    .trade-top-bar {
+        flex-direction: column;
+        align-items: stretch;
+    }
+
+    .trade-top-bar-actions {
+        width: 100%;
+    }
+
+    .trade-top-bar-actions .btn-ctp-sm {
+        width: 100%;
+        min-height: var(--touch-min);
+    }
+
     .pos-metrics {
         grid-template-columns: repeat(2, 1fr);
     }