Use tertiary color for delete buttons

Implementation improvements:
- Added optional color parameter to MetadataLabel.makeIconOnly() with backward compatibility
- Applied color tinting using withSymbolConfiguration() for proper SF Symbol rendering instead of relying on foregroundColor attributes on NSTextAttachment
- Used flatMap to handle optional chaining when creating tinted symbols

Author: erusev

LlamaBarn/Menu/InstalledModelItemView.swift

@@ -202,7 +202,7 @@ final class InstalledModelItemView: ItemView, NSGestureRecognizerDelegate {
   }
 
   private func makeDeleteButtonText() -> NSAttributedString {
-    MetadataLabel.makeIconOnly(icon: Symbols.trash)
+    MetadataLabel.makeIconOnly(icon: Symbols.trash, color: Typography.tertiaryColor)
   }
 
   @objc private func performDelete() {

LlamaBarn/Menu/MetadataLabel.swift

@@ -7,9 +7,11 @@ enum MetadataLabel {
 
   /// Creates an attributed string containing only an icon (no text).
   /// Used for status indicators like checkmarks.
-  static func makeIconOnly(icon: NSImage?) -> NSAttributedString {
+  static func makeIconOnly(icon: NSImage?, color: NSColor? = nil) -> NSAttributedString {
     guard let icon else { return NSAttributedString() }
-    return NSAttributedString(attachment: iconAttachment(for: icon))
+    let tintedIcon =
+      color.flatMap { icon.withSymbolConfiguration(.init(paletteColors: [$0])) } ?? icon
+    return NSAttributedString(attachment: iconAttachment(for: tintedIcon))
   }
 
   /// Creates an attributed string with an icon followed by text (e.g., "📦 2.5 GB").