feat(admin-dashboard): add mini share chart for plan order top5

public/css/admin-components.css

@@ -415,6 +415,67 @@
     color:var(--adm-text, #0f172a);
 }
 
+/* 可复用：迷你占比（Top5）（渐进增强：由 admin.js 渲染，页面无 JS 时为空但不影响表格） */
+.adm-mini-share{
+    margin-top:10px;
+    width:100%;
+    display:flex;
+    flex-direction:column;
+    gap:8px;
+    padding:10px 10px;
+    border:1px solid var(--adm-border-color, #e5e7eb);
+    border-radius:var(--adm-radius, 12px);
+    background:var(--adm-surface-tint, rgba(15, 23, 42, .02));
+    box-shadow:var(--adm-shadow-sm);
+}
+
+.adm-mini-share.is-empty{
+    align-items:center;
+    justify-content:center;
+    color:var(--adm-text-muted, #94a3b8);
+    font-size:12px;
+}
+
+.adm-mini-share-row{
+    display:flex;
+    align-items:center;
+    gap:10px;
+}
+
+.adm-mini-share-name{
+    width:72px;
+    min-width:72px;
+    max-width:72px;
+    font-size:12px;
+    color:var(--adm-text-secondary, #64748b);
+    white-space:nowrap;
+    overflow:hidden;
+    text-overflow:ellipsis;
+}
+
+.adm-mini-share-bar-wrap{
+    flex:1;
+    min-width:0;
+    height:12px;
+    border-radius:999px;
+    background:rgba(15, 23, 42, .06);
+    overflow:hidden;
+}
+
+.adm-mini-share-bar{
+    height:100%;
+    border-radius:999px;
+    background:linear-gradient(90deg, rgba(245, 158, 11, .45), rgba(245, 158, 11, .16));
+}
+
+.adm-mini-share-value{
+    width:92px;
+    min-width:92px;
+    text-align:right;
+    font-size:12px;
+    color:var(--adm-text, #0f172a);
+}
+
 .kpi-grid{
     display:grid;
     grid-template-columns:repeat(4,minmax(0,1fr));