feat: add type-safe native platform headers and portable drag support

- Add include/yasl/native/{wayland,cocoa,x11}.h with type-safe handle accessors.
- Unify drag-and-drop and window carry support across Wayland, X11, and Cocoa.
- Preserve full ABI compatibility for capability flags.
- Install native headers conditionally based on enabled backend.
- Include missing tablet example and backend test suites.

1 files changed, 13 insertions, 3 deletions

diff --git a/tests/meson.build b/tests/meson.build
index 177e400..75ff00d 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -45,11 +45,21 @@ if system == 'linux'
         export_args += ['--allow-export=__start_asan_globals',
                         '--allow-export=__stop_asan_globals']
     endif
+    exported_headers = files(
+        '../include/yasl/yasl.h',
+        '../include/yasl/timing.h',
+        '../include/yasl/loop.h',
+        '../include/yasl/native.h',
+    )
+    if has_wayland
+        exported_headers += files('../include/yasl/native/wayland.h')
+    endif
+    if has_x11
+        exported_headers += files('../include/yasl/native/x11.h')
+    endif
     test('public-exports', python,
         args: [files('helpers/check_exports.py')] + export_args +
-              [nm, yasl_lib.get_shared_lib(),
-               files('../include/yasl/yasl.h', '../include/yasl/timing.h',
-                     '../include/yasl/loop.h', '../include/yasl/native.h')],
+              [nm, yasl_lib.get_shared_lib(), exported_headers],
     )
 endif