docs: explain Tessera modules and execution flows in Chinese

src/shell/native_chrome.rs

@@ -1,3 +1,6 @@
+//! macOS 原生标题栏适配。定位系统窗口按钮并沿用用户的标题栏双击设置。
+//! 仅在 macOS 编译；Objective-C 交互局限在原生窗口层，不参与 Endor 布局与事件分发。
+//!
 //! Keep AppKit's real window buttons aligned with the custom tab strip.
 use objc2_app_kit::{NSApplication, NSView, NSWindowButton, NSWindowStyleMask};
 use objc2_foundation::{MainThreadMarker, NSPoint, NSString, NSUserDefaults};
@@ -8,6 +11,7 @@ use winit::{
 
 /// The custom draggable row does not receive AppKit's titlebar double-click
 /// action automatically. Use the native click count and native window actions.
+/// 读取系统偏好的标题栏双击行为，委托原生窗口执行相应动作。
 pub fn titlebar_double_click(window: &Window) -> bool {
     let Some(main_thread) = MainThreadMarker::new() else {
         return false;
@@ -49,6 +53,7 @@ pub fn titlebar_double_click(window: &Window) -> bool {
 
 /// Called only on winit's main thread, after native creation and before drawing.
 /// AppKit can restore its default button positions when laying out the title bar.
+/// 调整真实 macOS 窗口三键的位置，与全尺寸内容和侧栏控制区对齐。
 pub fn align_controls(window: &Window) {
     let Ok(handle) = window.window_handle() else {
         return;