Add persistent device traffic history charts

src/web/styles.css

@@ -753,6 +753,28 @@ p {
   position: relative;
 }
 
+.client-devices-scale {
+  display: flex;
+  padding: 2px;
+  border: 1px solid color-mix(in oklch, var(--client-border) 72%, transparent);
+  border-radius: 999px;
+}
+
+.client-devices-scale button {
+  padding: 4px 6px;
+  border: 0;
+  border-radius: 999px;
+  background: transparent;
+  color: var(--client-muted);
+  font: 700 9px/1 'JetBrains Mono', 'SF Mono', ui-monospace, Menlo, monospace;
+  cursor: pointer;
+}
+
+.client-devices-scale button[aria-pressed="true"] {
+  background: color-mix(in oklch, var(--client-accent) 14%, transparent);
+  color: var(--client-accent);
+}
+
 .client-devices-sort {
   min-height: 28px;
   display: flex;
@@ -902,7 +924,7 @@ p {
 .client-device {
   display: grid;
   grid-template-columns: 34px minmax(0, 1fr) 112px 34px;
-  grid-template-rows: 34px 28px;
+  grid-template-rows: 34px 42px;
   align-items: start;
   column-gap: 8px;
   row-gap: 6px;
@@ -1302,7 +1324,7 @@ p {
 .client-device-traffic-chart {
   grid-column: 2 / 4;
   grid-row: 2;
-  height: 28px;
+  height: 42px;
   position: relative;
   overflow: hidden;
 }
@@ -1310,7 +1332,7 @@ p {
 .client-device-traffic-chart::after {
   position: absolute;
   right: 0;
-  bottom: 0;
+  bottom: 13px;
   left: 0;
   height: 1px;
   background: color-mix(in oklch, var(--client-border) 58%, transparent);
@@ -1319,24 +1341,34 @@ p {
 
 .client-device-traffic-track {
   position: absolute;
-  inset: 0 0 1px;
-  display: flex;
+  inset: 0 0 14px;
+  display: grid;
+  grid-template-columns: repeat(var(--sample-count), minmax(1px, 1fr));
   align-items: flex-end;
-  justify-content: flex-end;
-  gap: 3px;
+  gap: 1px;
   animation: client-device-traffic-shift 420ms cubic-bezier(0.16, 1, 0.3, 1);
 }
 
 .client-device-traffic-bar {
-  width: 5px;
   min-height: 2px;
-  flex: 0 0 5px;
   display: flex;
   overflow: hidden;
   border-radius: 2px 2px 0 0;
   flex-direction: column-reverse;
 }
 
+.client-device-traffic-time {
+  position: absolute;
+  right: 0;
+  bottom: 0;
+  left: 0;
+  display: flex;
+  justify-content: space-between;
+  color: var(--client-muted);
+  font-size: 8px;
+  line-height: 10px;
+}
+
 .client-device-traffic-bar > span {
   width: 100%;
   display: block;