Show recovery guidance when paused usage has no cache

shell/plugins/agents/Panel.qml

@@ -422,6 +422,10 @@ Panel {
     return status !== "" && status !== "Limits paused" && !needsSignIn(item) ? status : ""
   }
 
+  function pausedWithoutLimits(item) {
+    return !!item && item.usageStatusText === "Limits paused" && limitWindows(item).length === 0
+  }
+
   // Sign an account that's already here in again, following along in the
   // add view just like adding one.
   function signInAgain(p, account) {
@@ -1343,6 +1347,12 @@ Panel {
       wrapMode: Text.WordWrap
     }
 
+    UnavailableUsage {
+      visible: !section.multi && root.pausedWithoutLimits(section.provider)
+      width: parent.width
+      record: section.provider
+    }
+
     Column {
       visible: !section.multi && section.windows.length > 0
       width: parent.width
@@ -1449,6 +1459,11 @@ Panel {
           width: parent.width
           spacing: Style.space(12)
 
+          UnavailableUsage {
+            width: parent.width
+            record: accountBlock.modelData
+          }
+
           Repeater {
             model: root.displayWindows({ limits: accountBlock.modelData.limits || [] })
 
@@ -1833,6 +1848,29 @@ Panel {
     }
   }
 
+  // With no measured windows, leave a place to discover how to get usage.
+  component UnavailableUsage: Item {
+    id: unavailable
+    property var record: null
+    visible: root.pausedWithoutLimits(record)
+    implicitHeight: unavailableLabel.implicitHeight
+
+    Text {
+      id: unavailableLabel
+      text: "Usage unavailable"
+      color: root.dim
+      font.family: root.fontFamily
+      font.pixelSize: Style.font.bodySmall
+    }
+
+    HoverHandler { id: unavailableHover }
+
+    PanelToolTip {
+      visible: unavailableHover.hovered && unavailable.visible
+      text: unavailable.record ? String(unavailable.record.authHelpText || "Usage has not been updated yet.") : ""
+    }
+  }
+
   // One line per limit window: title, meter, percentage, and reset. A
   // model-scoped allowance on the same clock ("Fable" on Weekly) is a marker
   // on this row's meter, named in the row's tooltip.