[Bug]: *scratch* welcome text glyphs corrupted; macOS title bar missing

[yibie]

Bug summary

Two problems observed in the same session (may be independent):

1. *scratch* initial text renders with corrupted glyphs — the default welcome message loses strokes and characters.
2. macOS window title bar is missing — no traffic-light buttons / native title bar.

Environment

• Neomacs 0.0.15, built with cargo xtask fresh-build --release from commit e8b875ab7 (local main was ~120 commits behind upstream 330afe3d9 at the time of the report)
• macOS 27.0 (Build 26A5388g), Apple Silicon (arm64)
• Started via chemacs with my Emacs config; early-init.el contains:
  (push '(ns-transparent-titlebar . t) default-frame-alist)

Problem 1: glyph corruption in scratch

Steps to reproduce

1. Launch ./target/release/neomacs with the config above.
2. The initial *scratch* buffer shows the default welcome text.

Expected behavior

As in GNU Emacs:

;; This buffer is for text that is not saved, and for Lisp evaluation.
;; To create a file, visit it with C-x C-f and enter text in its buffer.

Observed behavior (see screenshot)

• The leading ;; of the first line renders as ii.
• The second line loses its leading ;; To c entirely.
• Many e glyphs lose their middle stroke and look like c:
  create → rcatca / frcate, file → falc, evaluation → cvaluation, enter → cnter.
• * glyphs (buffer name, window title) render like •.
• Text typed afterwards (e.g. Chinese via IME) renders fine — so far only the initial scratch text appears affected.

Problem 2: missing title bar

Steps to reproduce

1. Launch with (ns-transparent-titlebar . t) in default-frame-alist.

Expected behavior

GNU Emacs on macOS shows a transparent title bar with the traffic-light buttons still visible.

Observed behavior

The Neomacs window shows no title bar at all — no traffic lights, no native title bar. The screenshot shows only the title text on a white strip, with no window controls.

Runtime diagnostics

$ ./target/release/neomacs --version
Neomacs 0.0.15
Standalone Rust binary for Neomacs (no C dependency)

--help shows the standard usage; no crash or error logs.

Screenshot