style: use moon emoji for system theme command

Sources/Conjure/LauncherWindowController.swift

@@ -45,6 +45,7 @@ final class LauncherWindowController: NSWindowController, NSWindowDelegate, NSSe
     private static let emojiIcon = makeEmojiIcon("🤔")
     private static let notesIcon = makeEmojiIcon("📔")
     private static let translateIcon = makeEmojiIcon("🌏")
+    private static let themeIcon = makeEmojiIcon("🌗")
 
     private static func makeEmojiIcon(_ emoji: String) -> NSImage {
         let text = NSAttributedString(string: emoji, attributes: [.font: NSFont.systemFont(ofSize: 28)])
@@ -566,13 +567,13 @@ final class LauncherWindowController: NSWindowController, NSWindowDelegate, NSSe
                 cell.imageView?.image = Self.notesIcon
                 cell.toolTip = "Write notes with Markdown and images"
             case .toggleTheme:
-                cell.imageView?.image = NSImage(systemSymbolName: "circle.lefthalf.filled", accessibilityDescription: nil)
+                cell.imageView?.image = Self.themeIcon
                 cell.toolTip = "Switch macOS between light and dark appearance"
             default:
                 cell.imageView?.image = Self.translateIcon
                 cell.toolTip = "Translate English to Japanese"
             }
-            cell.imageView?.contentTintColor = entry.command == .toggleTheme ? SunsetPalette.accent : nil
+            cell.imageView?.contentTintColor = nil
         } else {
             let application = results[row]
             cell.textField?.stringValue = application.name