WIP: hide empty collection count pills

sources/clipbored/views/ClipboardPanelView.swift

@@ -1493,6 +1493,11 @@ final class ClipboardPanelView: NSVisualEffectView, NSSearchFieldDelegate {
     return ClipboardSortMode.allCases.compactMap { collectionButtons[$0]?.count }
   }
 
+  var debugCollectionCountLabelHiddenStates: [Bool] {
+    updateCollectionButtons()
+    return ClipboardSortMode.allCases.compactMap { collectionButtons[$0]?.debugCountLabelIsHidden }
+  }
+
   var debugCollectionChipAccessibilityLabels: [String] {
     updateCollectionButtons()
     return ClipboardSortMode.allCases.compactMap { collectionButtons[$0]?.accessibilityLabel() }
@@ -1565,6 +1570,11 @@ final class ClipboardPanelView: NSVisualEffectView, NSSearchFieldDelegate {
     return viewModel.collectionNames.compactMap { customCollectionButtons[$0]?.count }
   }
 
+  var debugCustomCollectionCountLabelHiddenStates: [Bool] {
+    updateCollectionButtons()
+    return viewModel.collectionNames.compactMap { customCollectionButtons[$0]?.debugCountLabelIsHidden }
+  }
+
   var debugCustomCollectionColorHexes: [String: String] {
     Dictionary(uniqueKeysWithValues: viewModel.collectionNames.map { name in
       (name, ClipboardCollectionVisuals.hexString(for: collectionColor(forCollectionNamed: name)))
@@ -2109,6 +2119,7 @@ private final class CollectionChipView: NSView {
       ? NSColor.controlAccentColor.withAlphaComponent(0.16)
       : NSColor.labelColor.withAlphaComponent(0.07)
     ).cgColor
+    updateCountLabelVisibility()
     updateAccessibility()
     updateChrome()
   }
@@ -2138,9 +2149,14 @@ private final class CollectionChipView: NSView {
   func setCount(_ count: Int) {
     self.count = count
     countLabel.stringValue = count > 999 ? "999+" : "\(count)"
+    updateCountLabelVisibility()
     updateAccessibility()
   }
 
+  private func updateCountLabelVisibility() {
+    countLabel.isHidden = count == 0
+  }
+
   private func updateAccessibility() {
     let noun = count == 1 ? "clip" : "clips"
     let selectedText = isSelected ? "selected, " : ""
@@ -2291,6 +2307,10 @@ private final class CollectionChipView: NSView {
     isKeyboardFocused
   }
 
+  var debugCountLabelIsHidden: Bool {
+    countLabel.isHidden
+  }
+
   func debugDropItem(_ itemID: UUID) {
     onDropItem?(itemID)
   }