chore: standardize project comments in English

web/src/common/utils/viewport.ts

@@ -1,6 +1,6 @@
-// 软键盘弹出时，iOS Safari 与新版 Android Chrome 只缩小可视区域、页面高度不变，
-// 编辑器底部（光标、键盘上方的工具条）会被键盘挡住。把应用高度设为可视区域的高度。
-// 双指缩放也会改变可视区域，缩放时不调整
+// When software keyboards open, iOS Safari and recent Android Chrome shrink the visual viewport without changing page height,
+// covering the editor bottom, cursor, and toolbar. Set application height to the visual viewport height.
+// Pinch zoom also changes the visual viewport; do not resize while zooming.
 export function trackVisualViewport(onShrink: () => void) {
   const vv = window.visualViewport
   if (!vv) return
@@ -8,7 +8,7 @@ export function trackVisualViewport(onShrink: () => void) {
   const update = () => {
     const height = vv.scale > 1.01 ? null : vv.height
     document.documentElement.style.setProperty('--rm-app-height', height === null ? '100%' : `${height}px`)
-    // iOS 会把页面整体上推以露出输入位置，应用高度已经适配，推回原位
+    // iOS shifts the page to reveal the input; application height already accounts for the keyboard, so restore its position.
     if (height !== null && vv.offsetTop > 0) window.scrollTo(0, 0)
     if (height !== null && height < last) requestAnimationFrame(onShrink)
     last = vv.height