feat(dashboard): 增加首页工作台并调整聊天入口

static/css/login.css

@@ -1478,6 +1478,116 @@ input:focus {
   background: #eaf2ff;
 }
 
+.dashboard-page {
+  display: grid;
+  align-content: start;
+  gap: 12px;
+  height: calc(100vh - 60px);
+  overflow-y: auto;
+  padding: 16px 24px 20px;
+  background: var(--bg);
+}
+
+.dashboard-hero,
+.metric-grid,
+.dashboard-split,
+.dashboard-panel {
+  width: min(1440px, 100%);
+  margin: 0 auto;
+}
+
+.dashboard-hero {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+  padding: 0;
+}
+
+.dashboard-hero h1 {
+  margin: 2px 0;
+  font-size: 22px;
+}
+
+.dashboard-hero p {
+  margin: 0;
+  color: var(--muted);
+  font-size: 13px;
+}
+
+.dashboard-primary-action {
+  background: #ffffff;
+}
+
+.metric-grid {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 12px;
+}
+
+.metric-card {
+  display: grid;
+  gap: 8px;
+  min-height: 104px;
+  padding: 14px;
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  background: #ffffff;
+}
+
+.metric-card span,
+.metric-card em {
+  color: var(--muted);
+  font-size: 12px;
+  font-style: normal;
+  font-weight: 700;
+}
+
+.metric-card strong {
+  color: var(--text);
+  font-size: 30px;
+  line-height: 1;
+}
+
+.dashboard-split {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 12px;
+}
+
+.dashboard-stat-list {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 10px;
+  margin: 0;
+}
+
+.dashboard-stat-list div {
+  display: grid;
+  gap: 6px;
+  padding: 12px;
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  background: #f8fafc;
+}
+
+.dashboard-stat-list dt {
+  color: var(--muted);
+  font-size: 12px;
+  font-weight: 700;
+}
+
+.dashboard-stat-list dd {
+  margin: 0;
+  color: var(--text);
+  font-size: 22px;
+  font-weight: 800;
+}
+
+.recent-activity-table td {
+  height: 44px;
+}
+
 .table-empty,
 .attachment-manager-empty {
   color: var(--muted);
@@ -2293,6 +2403,23 @@ input:focus {
     grid-template-columns: 1fr;
     gap: 4px;
   }
+
+  .dashboard-page {
+    height: auto;
+    min-height: calc(100vh - 60px);
+    padding: 12px;
+  }
+
+  .dashboard-hero {
+    align-items: stretch;
+    flex-direction: column;
+  }
+
+  .metric-grid,
+  .dashboard-split,
+  .dashboard-stat-list {
+    grid-template-columns: 1fr;
+  }
 }
 
 @keyframes pulse-caret {