iOS lock step keyboard + metal

library/modules/ui/renderer.sx

@@ -375,6 +375,7 @@ UIRenderer :: struct {
                     u1 := cached.uv_x + cached.uv_w;
                     v1 := cached.uv_y + cached.uv_h;
 
+
                     if self.vertex_count + 6 > MAX_UI_VERTICES {
                         self.flush();
                     }
@@ -619,12 +620,7 @@ fragment float4 fmain(VOut in [[stage_in]],
         // Image mode (mode == -2.0): sample texture
         return tex.sample(s, in.uv) * in.color;
     } else if (mode < 0.0) {
-        // Text mode (mode == -1.0): the glyph atlas stores R8 alpha
-        // coverage from stbtt_MakeGlyphBitmap. Use the sampled value
-        // directly as alpha (no smoothstep — those were for SDFs and
-        // thinned anti-aliased coverage strokes). Small-size text renders
-        // dim on dark backgrounds because most glyph pixels sit in 0.1-0.5
-        // coverage; tracked as the "faint text" follow-up.
+        // Text mode (mode == -1.0): the glyph atlas stores R8 alpha coverage.
         float alpha = tex.sample(s, in.uv).r;
         return float4(in.color.rgb, in.color.a * alpha);
     } else if (mode > 0.0 || border > 0.0) {