ElyMark: a new file takes typing in visual; modes change no byte; PERF-07 timed (C14.6)

The component library opens an empty visual document's end on focus.
The view logs once when its mode first takes input; 1 MB opens to
visual in 341 ms P50 on Windows.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Cargo.lock

@@ -1922,7 +1922,7 @@ dependencies = [
 [[package]]
 name = "ely-gpui-component"
 version = "0.1.1"
-source = "git+https://git.zacharyzhang.com/ZacharyZhang-NY/Ely-GPUI-Components?rev=f59c9f7f500be3b42ea184e96f747549f006099d#f59c9f7f500be3b42ea184e96f747549f006099d"
+source = "git+https://git.zacharyzhang.com/ZacharyZhang-NY/Ely-GPUI-Components?rev=6f0401e96706502f2229d73dd50bacbcc48b4349#6f0401e96706502f2229d73dd50bacbcc48b4349"
 dependencies = [
  "alacritty_terminal",
  "anyhow",