Unify attachment display and enable file uploads on all platforms (#1501)

Attachment pills were drawn by four separate style sets, so files,
images, GitHub items, and reviews rendered at different heights in the
same tray. Move the frame, the two-line label, and the image thumbnail
into shared components so every attachment lines up at one height,
across both the composer and sent messages.

Sent-message images now open the lightbox, and file uploads work on
iOS and Android via expo-document-picker instead of being gated to
desktop.

packages/app/src/i18n/resources/zh-CN.ts

@@ -110,7 +110,7 @@ export const zhCN: TranslationResources = {
       removeFile: "Remove file attachment",
       openGithub: "打开 {{kind}} #{{number}}",
       removeGithub: "移除 {{kind}} #{{number}}",
-      browserElement: "元素 · {{tag}}",
+      element: "元素",
       openBrowserElement: "打开浏览器元素附件",
       removeBrowserElement: "移除浏览器元素附件",
       openReview: "打开 review 附件",
@@ -255,9 +255,12 @@ export const zhCN: TranslationResources = {
       imageUnavailable: "图片不可用",
       imagePreviewUnavailable: "图片预览不可用。",
       imagePreviewLoadFailed: "无法加载图片预览。",
-      reviewOne: "Review · 1 条评论",
-      reviewMany: "Review · {{count}} 条评论",
+      review: "审查",
+      commentsOne: "1 条评论",
+      commentsMany: "{{count}} 条评论",
       textAttachment: "文本附件",
+      text: "文本",
+      file: "文件",
     },
     speak: {
       header: "已朗读",