feat(threads): add editing, moderation retry, and emoji reactions

Add API routes and UI for editing threads and messages
Allow users to retry AI moderation for failed messages
Migrate thread reactions to use native emojis
Implement frontend search filtering for thread list

system-wordings.ts

@@ -1028,11 +1028,15 @@ export const systemWordingMessages = {
         channels: 'Channels',
         allChannels: 'All channels',
         newThread: 'New Thread',
+        createPost: 'Create Post',
+        searchOrCreate: 'Search or Create New Post',
+        editPost: 'Edit Post',
         threadTitle: 'Title',
         firstMessage: 'First message',
         message: 'Message',
         send: 'Send',
         sending: 'Sending',
+        editMessage: 'Edit Message',
         follow: 'Follow',
         unfollow: 'Unfollow',
         lock: 'Lock',
@@ -1051,12 +1055,20 @@ export const systemWordingMessages = {
         jumpToPresent: 'Jump to Present',
         unreadDivider: 'Unread messages',
         noThreads: 'No threads yet',
+        noSearchResults: 'No matching posts',
         noMessages: 'No messages yet',
         selectThread: 'Select a thread',
+        messageUnreviewed: 'Not reviewed',
         messageReviewing: 'Reviewing',
         messageRejected: 'Not approved',
+        messageFailedReview: 'Review failed',
+        moderationRetry: 'Retry review',
+        moderationRetrying: 'Retrying',
         createFailed: 'Thread could not be created',
+        editFailed: 'Thread could not be updated',
         messageFailed: 'Message could not be sent',
+        messageEditFailed: 'Message could not be updated',
+        moderationRetryFailed: 'Review retry failed',
         reactionFailed: 'Reaction could not be updated',
         followFailed: 'Follow could not be updated'
       },
@@ -2445,11 +2457,15 @@ export const systemWordingMessages = {
         channels: '频道',
         allChannels: '全部频道',
         newThread: '新帖子',
+        createPost: '创建帖子',
+        searchOrCreate: '搜索或创建新帖子',
+        editPost: '编辑帖子',
         threadTitle: '标题',
         firstMessage: '首条消息',
         message: '消息',
         send: '发送',
         sending: '发送中',
+        editMessage: '编辑消息',
         follow: '关注',
         unfollow: '取消关注',
         lock: '锁定',
@@ -2468,12 +2484,20 @@ export const systemWordingMessages = {
         jumpToPresent: '跳到最新',
         unreadDivider: '未读消息',
         noThreads: '暂无帖子',
+        noSearchResults: '没有匹配的帖子',
         noMessages: '暂无消息',
         selectThread: '选择一个帖子',
+        messageUnreviewed: '未审核',
         messageReviewing: '审核中',
         messageRejected: '未通过',
+        messageFailedReview: '审核失败',
+        moderationRetry: '重新审核',
+        moderationRetrying: '重审中',
         createFailed: '帖子创建失败',
+        editFailed: '帖子更新失败',
         messageFailed: '消息发送失败',
+        messageEditFailed: '消息更新失败',
+        moderationRetryFailed: '重新审核失败',
         reactionFailed: 'Reaction 更新失败',
         followFailed: '关注状态更新失败'
       },