feat(life): allow authors to view and restore their deleted comments

Update backend to return soft-deleted comments to their authors
Add restore endpoint and frontend Undo button for deleted comments
Retain comment body and author information upon deletion

system-wordings.ts

@@ -909,10 +909,12 @@ export const systemWordingMessages = {
         deleteComment: 'Delete comment',
         deleteCommentConfirm: 'Delete this comment?',
         commentDeleted: 'Comment deleted',
+        restoreComment: 'Undo',
         commentRequired: 'Please enter a comment.',
         commentFailed: 'Comment failed',
         replyFailed: 'Reply failed',
         deleteCommentFailed: 'Delete comment failed',
+        restoreCommentFailed: 'Undo failed',
         publish: 'Post',
         publishing: 'Posting',
         update: 'Update',
@@ -2186,10 +2188,12 @@ export const systemWordingMessages = {
         deleteComment: '删除评论',
         deleteCommentConfirm: '确认删除这条评论？',
         commentDeleted: '评论已删除',
+        restoreComment: '撤销',
         commentRequired: '请输入评论内容。',
         commentFailed: '评论失败',
         replyFailed: '回复失败',
         deleteCommentFailed: '删除评论失败',
+        restoreCommentFailed: '撤销失败',
         publish: '发布',
         publishing: '发布中',
         update: '更新',