opt: shrink input event to 48B, pack mouse event to 32B, and shave 2KB off yasl_surface

- Compact yasl_mouse_event from 36B to 32B (half a cacheline, 0 holes)
- Compact yasl_input_event from 56B to 48B (0 holes)
- Reduce yasl_surface by 2,048 bytes (shaving 32 full cachelines per surface)
- Optimize UTF-8 sanitize with vectorized validation fast-path
- Fast-path MIME prefix match in clipboard transfers

1 files changed, 5 insertions, 4 deletions

diff --git a/include/yasl/yasl.h b/include/yasl/yasl.h
index 081e1f0..c211a0b 100644
--- a/include/yasl/yasl.h
+++ b/include/yasl/yasl.h
@@ -208,12 +208,12 @@ struct yasl_key_event {
 
 struct yasl_mouse_event {
     struct yasl_vector2i pos;
-    int button;
+    int16_t button;
+    int16_t scroll_lines;
     enum yasl_pointer_kind kind;
+    enum yasl_pointer_device device;
     uint32_t mods;
-    int scroll_lines;
     float scroll_delta;
-    enum yasl_pointer_device device;
     struct yasl_pointer_pen pen;
 };
 
@@ -227,8 +227,9 @@ enum yasl_input_kind {
 };
 
 struct yasl_input_event {
-    enum yasl_input_kind kind;
     struct yasl_surface *surface;
+    enum yasl_input_kind kind;
+    uint32_t reserved;
     union {
         struct yasl_key_event key;
         struct yasl_mouse_event mouse;