fix: rewrite backend hooks, fix invitation flow, align frontend API, fix component naming

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/api/invitations.ts

@@ -1,8 +1,6 @@
 // src/api/invitations.ts
 import pb from './pocketbase'
-import type { Invitation, InviteStatus } from '@/types'
-import { joinTeamSession } from './sessions'
-import { updateUserStatus } from './users'
+import type { Invitation } from '@/types'
 
 // 发送邀请
 export async function sendInvitation(data: {
@@ -71,35 +69,16 @@ export async function respondInvitation(
   response: 'accepted' | 'rejected',
   rejectReason?: string
 ) {
-  const user = pb.authStore.model
-  if (!user) throw new Error('未登录')
-
-  const invitation = await pb.collection('invitations').getOne(invitationId)
-
-  if (invitation.to !== user.id) {
-    throw new Error('无权操作此邀请')
-  }
-
-  const updateData: Partial<Invitation> = {
-    status: response as InviteStatus,
-    respondedAt: new Date().toISOString()
+  const updateData: Record<string, unknown> = {
+    status: response
   }
 
   if (response === 'rejected' && rejectReason) {
     updateData.rejectReason = rejectReason
   }
 
-  // 更新邀请状态
+  // 后端 hook 会自动处理：加入 team members + 更新用户状态
   await pb.collection('invitations').update(invitationId, updateData)
-
-  // 如果接受，加入临时小组
-  if (response === 'accepted') {
-    await joinTeamSession(invitation.teamSession)
-    // 更新用户状态
-    await updateUserStatus('in_team')
-  }
-
-  return updateData
 }
 
 // 订阅邀请变更