use proper type for optional path

include/ghostty.h

@@ -463,6 +463,12 @@ typedef struct {
 
 // Config types
 
+// config.Path
+typedef struct {
+  const char* path;
+  bool optional;
+} ghostty_config_path_s;
+
 // config.Color
 typedef struct {
   uint8_t r;

macos/Sources/App/macOS/AppDelegate.swift

@@ -778,8 +778,8 @@ class AppDelegate: NSObject,
         }
 
         if ghostty.config.bellFeatures.contains(.audio) {
-            if let path = ghostty.config.bellAudioPath,
-               let sound = NSSound(contentsOfFile: path, byReference: false) {
+            if let configPath = ghostty.config.bellAudioPath,
+               let sound = NSSound(contentsOfFile: configPath.path, byReference: false) {
                 sound.volume = ghostty.config.bellAudioVolume
                 sound.play()
             }

macos/Sources/Ghostty/Ghostty.Config.swift

@@ -134,14 +134,13 @@ extension Ghostty {
             return .init(rawValue: v)
         }
 
-        var bellAudioPath: String? {
+        var bellAudioPath: ConfigPath? {
             guard let config = self.config else { return nil }
-            var v: UnsafePointer<Int8>?
+            var v = ghostty_config_path_s()
             let key = "bell-audio-path"
             guard ghostty_config_get(config, &v, key, UInt(key.lengthOfBytes(using: .utf8))) else { return nil }
-            guard let ptr = v else { return nil }
-            let path = String(cString: ptr)
-            return path.isEmpty ? nil : path
+            let path = String(cString: v.path)
+            return path.isEmpty ? nil : ConfigPath(path: path, optional: v.optional)
         }
 
         var bellAudioVolume: Float {

macos/Sources/Ghostty/Ghostty.ConfigTypes.swift

@@ -2,6 +2,12 @@
 // can get typed information without depending on all the dependencies of GhosttyKit.
 
 extension Ghostty {
+    /// A configuration path value that may be optional or required.
+    struct ConfigPath: Sendable {
+        let path: String
+        let optional: Bool
+    }
+
     /// macos-icon
     enum MacOSIcon: String, Sendable {
         case official

src/config/path.zig

@@ -32,11 +32,17 @@ pub const Path = union(enum) {
         return std.meta.eql(self, other);
     }
 
-    /// Returns the path as a C-compatible null-terminated string pointer.
-    pub fn cval(self: Path) [*:0]const u8 {
+    /// ghostty_config_path_s
+    pub const C = extern struct {
+        path: [*:0]const u8,
+        optional: bool,
+    };
+
+    /// Returns the path as a C-compatible struct.
+    pub fn cval(self: Path) C {
         return switch (self) {
-            .optional => |path| path.ptr,
-            .required => |path| path.ptr,
+            .optional => |path| .{ .path = path.ptr, .optional = true },
+            .required => |path| .{ .path = path.ptr, .optional = false },
         };
     }