feat: add provider usage tracking

apps/macos/Sources/Clawdbot/UsageMenuLabelView.swift

@@ -0,0 +1,46 @@
+import SwiftUI
+
+struct UsageMenuLabelView: View {
+    let row: UsageRow
+    let width: CGFloat
+    private let paddingLeading: CGFloat = 22
+    private let paddingTrailing: CGFloat = 14
+    private let barHeight: CGFloat = 6
+
+    private var primaryTextColor: Color { .primary }
+    private var secondaryTextColor: Color { .secondary }
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            if let used = row.usedPercent {
+                ContextUsageBar(
+                    usedTokens: Int(round(used)),
+                    contextTokens: 100,
+                    width: max(1, self.width - (self.paddingLeading + self.paddingTrailing)),
+                    height: self.barHeight)
+            }
+
+            HStack(alignment: .firstTextBaseline, spacing: 6) {
+                Text(row.titleText)
+                    .font(.caption.weight(.semibold))
+                    .foregroundStyle(self.primaryTextColor)
+                    .lineLimit(1)
+                    .truncationMode(.middle)
+                    .layoutPriority(1)
+
+                Spacer(minLength: 4)
+
+                Text(row.detailText())
+                    .font(.caption.monospacedDigit())
+                    .foregroundStyle(self.secondaryTextColor)
+                    .lineLimit(1)
+                    .fixedSize(horizontal: true, vertical: false)
+                    .layoutPriority(2)
+            }
+        }
+        .padding(.vertical, 10)
+        .padding(.leading, self.paddingLeading)
+        .padding(.trailing, self.paddingTrailing)
+    }
+}
+