feat: 调整会话指标和资源指标的样式，优化间距和最小宽度

frontend/src/style.css

@@ -948,12 +948,12 @@ button:disabled {
   display: flex;
   flex: 0 0 auto;
   align-items: center;
-  gap: 4px;
+  gap: 0px;
 }
 
 .session-metrics > div {
-  min-width: 82px;
-  padding: 0 10px;
+  min-width: 64px;
+  padding: 0 7px;
   border-left: 1px solid #1c2932;
 }
 
@@ -981,6 +981,11 @@ button:disabled {
   white-space: nowrap;
 }
 
+.resource-metric + .resource-metric {
+  padding-left: 9px;
+  border-left: 1px solid #1c2932;
+}
+
 .resource-metric-line {
   display: flex;
   min-width: 0;
@@ -1963,8 +1968,8 @@ button:disabled {
   }
 
   .session-metrics > div {
-    min-width: 72px;
-    padding: 0 7px;
+    min-width: 58px;
+    padding: 0 5px;
   }
 
   .session-metrics > div:first-child {