ios: fix build issues Xcode 26 (#4216)

platform/darwin/src/MLNMapSnapshotter.mm

@@ -40,6 +40,8 @@
 
 #import "NSBundle+MLNAdditions.h"
 
+#include <optional>
+
 const CGPoint MLNLogoImagePosition = CGPointMake(8, 8);
 const CGFloat MLNSnapshotterMinimumPixelSize = 64;
 NSString *const MLNSnapshotterAnnotationSpritePrefix = @"org.maplibre.sprites.";
@@ -892,8 +894,9 @@ NSArray<MLNAttributionInfo *> *MLNAttributionInfosFromAttributions(
   }
 
   // Create the snapshotter
-  auto localFontFamilyName =
-      config.localFontFamilyName ? std::string(config.localFontFamilyName.UTF8String) : nullptr;
+  std::optional<std::string> localFontFamilyName =
+      config.localFontFamilyName ? std::optional(std::string(config.localFontFamilyName.UTF8String))
+                                 : std::nullopt;
   _delegateHost = std::make_unique<MLNMapSnapshotterDelegateHost>(self);
   _mbglMapSnapshotter = std::make_unique<mbgl::MapSnapshotter>(
       size, pixelRatio, resourceOptions, clientOptions, *_delegateHost, localFontFamilyName);

platform/darwin/src/MLNReachability.m

@@ -29,7 +29,6 @@
 
 #import <sys/socket.h>
 #import <netinet/in.h>
-#import <netinet6/in6.h>
 #import <arpa/inet.h>
 #import <ifaddrs.h>
 #import <netdb.h>