Add the agents usage bar widget

shell/plugins/panels/claude-usage/Model.js

@@ -0,0 +1,59 @@
+function parseUsage(raw) {
+  var values = {}
+  var lines = String(raw || "").split("\n")
+
+  for (var i = 0; i < lines.length; i++) {
+    var tabIndex = lines[i].indexOf("\t")
+    if (tabIndex === -1) continue
+    values[lines[i].substring(0, tabIndex)] = lines[i].substring(tabIndex + 1).trim()
+  }
+
+  return {
+    session: limitFrom(values, "session"),
+    weekly: limitFrom(values, "weekly"),
+    weeklyOpus: limitFrom(values, "weekly_opus")
+  }
+}
+
+function limitFrom(values, name) {
+  var percentText = values[name + "_percent"]
+  if (percentText === undefined) return null
+
+  var percent = parseInt(percentText, 10)
+  return {
+    percent: isNaN(percent) ? 0 : Math.max(0, Math.min(100, percent)),
+    resetsAt: values[name + "_resets"] || ""
+  }
+}
+
+function formatTimeUntil(resetsAt, nowMs) {
+  if (!resetsAt) return ""
+
+  var resetMs = new Date(resetsAt).getTime()
+  if (isNaN(resetMs)) return ""
+
+  var totalMinutes = Math.max(0, Math.round((resetMs - nowMs) / 60000))
+  var days = Math.floor(totalMinutes / 1440)
+  var hours = Math.floor((totalMinutes % 1440) / 60)
+  var minutes = totalMinutes % 60
+
+  if (days > 0) return days + "d " + hours + "h"
+  if (hours > 0) return hours + "h " + minutes + "m"
+  return minutes + "m"
+}
+
+function limitDetail(limit, nowMs) {
+  if (!limit) return ""
+
+  var timeUntilReset = formatTimeUntil(limit.resetsAt, nowMs)
+  if (timeUntilReset === "") return limit.percent + "%"
+  return limit.percent + "%  resets in " + timeUntilReset
+}
+
+if (typeof module !== "undefined") {
+  module.exports = {
+    parseUsage: parseUsage,
+    formatTimeUntil: formatTimeUntil,
+    limitDetail: limitDetail
+  }
+}