Split workspace into electron and ui packages

packages/ui/src/components/session/context-usage-panel.tsx

@@ -0,0 +1,63 @@
+import { createMemo, type Component } from "solid-js"
+import { getSessionInfo } from "../../stores/sessions"
+import { formatTokenTotal } from "../../lib/formatters"
+
+interface ContextUsagePanelProps {
+  instanceId: string
+  sessionId: string
+}
+
+const ContextUsagePanel: Component<ContextUsagePanelProps> = (props) => {
+  const info = createMemo(
+    () =>
+      getSessionInfo(props.instanceId, props.sessionId) ?? {
+        tokens: 0,
+        cost: 0,
+        contextWindow: 0,
+        isSubscriptionModel: false,
+        contextUsageTokens: 0,
+        contextUsagePercent: null,
+      },
+  )
+
+  const tokens = createMemo(() => info().tokens)
+  const contextUsageTokens = createMemo(() => info().contextUsageTokens ?? 0)
+  const contextWindow = createMemo(() => info().contextWindow)
+  const contextUsagePercent = createMemo(() => info().contextUsagePercent)
+
+  const costLabel = createMemo(() => {
+    if (info().isSubscriptionModel || info().cost <= 0) return "Included in plan"
+    return `$${info().cost.toFixed(2)} spent`
+  })
+
+  return (
+    <div class="session-context-panel border-r border-base border-b px-3 py-3">
+      <div class="flex items-center justify-between gap-4">
+        <div>
+          <div class="text-xs font-semibold text-primary/70 uppercase tracking-wide">Tokens (last call)</div>
+          <div class="text-lg font-semibold text-primary">{formatTokenTotal(tokens())}</div>
+        </div>
+        <div class="text-xs text-primary/70 text-right leading-tight">{costLabel()}</div>
+      </div>
+      <div class="mt-4">
+        <div class="flex items-center justify-between mb-1">
+          <div class="text-xs font-semibold text-primary/70 uppercase tracking-wide">Context window usage</div>
+          <div class="text-sm font-medium text-primary">{contextUsagePercent() !== null ? `${contextUsagePercent()}%` : "--"}</div>
+        </div>
+        <div class="text-sm text-primary/90">
+          {contextWindow()
+            ? `${formatTokenTotal(contextUsageTokens())} of ${formatTokenTotal(contextWindow())}`
+            : "Window size unavailable"}
+        </div>
+      </div>
+      <div class="mt-3 h-1.5 rounded-full bg-base relative overflow-hidden">
+        <div
+          class="absolute inset-y-0 left-0 rounded-full bg-accent-primary transition-[width]"
+          style={{ width: contextUsagePercent() === null ? "0%" : `${contextUsagePercent()}%` }}
+        />
+      </div>
+    </div>
+  )
+}
+
+export default ContextUsagePanel