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, 6 insertions, 3 deletions

diff --git a/src/wayland/clipboard.c b/src/wayland/clipboard.c
index 324644f..0e6ce33 100644
--- a/src/wayland/clipboard.c
+++ b/src/wayland/clipboard.c
@@ -170,9 +170,12 @@ static struct transfer *start_transfer(struct clipboard *c, int fd, bool sending
 
 static const char *match_text_mime(const char *mime)
 {
-    if (!strcasecmp(mime, "text/plain;charset=utf-8")) return "text/plain;charset=utf-8";
-    if (!strcasecmp(mime, "text/plain;charset=utf8")) return "text/plain;charset=utf8";
-    if (!strcasecmp(mime, "text/plain")) return "text/plain";
+    if (unlikely(!mime)) return NULL;
+    if (likely(!strncasecmp(mime, "text/plain", 10))) {
+        if (!strcasecmp(mime, "text/plain;charset=utf-8")) return "text/plain;charset=utf-8";
+        if (!strcasecmp(mime, "text/plain;charset=utf8")) return "text/plain;charset=utf8";
+        if (!strcasecmp(mime, "text/plain")) return "text/plain";
+    }
     if (!strcasecmp(mime, "UTF8_STRING")) return "UTF8_STRING";
     if (!strcasecmp(mime, "STRING")) return "STRING";
     if (!strcasecmp(mime, "TEXT")) return "TEXT";