fix: widen popover to 375px and fix empty flash on provider switch

- Popover width 370 → 375px so OpenCode tab is fully visible
- Fixed empty state flashing when switching provider tabs — now
  waits for the first fetch to complete before deciding if empty
- Checks payload.generated to distinguish "no data" from "not
  yet fetched"

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: henrylove0

mac/Sources/ExeWatcherMenubar/ExeWatcherApp.swift

@@ -6,7 +6,7 @@ import ServiceManagement
 private let refreshIntervalSeconds: UInt64 = 60
 private let idleRefreshIntervalSeconds: UInt64 = 300
 private let statusItemWidth: CGFloat = NSStatusItem.variableLength
-private let popoverWidth: CGFloat = 360
+private let popoverWidth: CGFloat = 375
 private let popoverHeight: CGFloat = 660
 private let menubarTitleFontSize: CGFloat = 13
 

mac/Sources/ExeWatcherMenubar/Views/MenuBarContent.swift

@@ -133,9 +133,14 @@ struct MenuBarContent: View {
 
     /// True when a specific provider tab is selected and that provider has no spend in the
     /// currently selected period. The .all tab is exempt -- it always shows aggregated data.
+    /// Also returns false if data hasn't been fetched yet (payload is empty default),
+    /// so we don't flash an empty state while the first fetch is in flight.
     private var isFilteredEmpty: Bool {
         guard store.selectedProvider != .all else { return false }
-        return store.payload.current.cost <= 0 && store.payload.current.calls == 0
+        let p = store.payload
+        // If generated is empty, we haven't fetched yet — don't show empty state
+        guard !p.generated.isEmpty else { return false }
+        return p.current.cost <= 0 && p.current.calls == 0
     }
 
     /// Show the tab row whenever the CLI detected at least one AI coding tool installed