feat: add GameGroup2 project with frontend and backend

- Add .gitignore for Node.js and PocketBase projects
- Add frontend (Vue 3 + Vite + TypeScript)
- Add backend (PocketBase)
- Add deployment scripts and Docker compose configs

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/api/groups.ts

@@ -0,0 +1,111 @@
+// src/api/groups.ts
+import pb from './pocketbase'
+import type { Group } from '@/types'
+
+// 创建群组
+export async function createGroup(data: {
+  name: string
+  description: string
+  maxMembers: number
+}) {
+  const user = pb.authStore.model
+  if (!user) throw new Error('未登录')
+
+  return pb.collection('groups').create({
+    ...data,
+    owner: user.id,
+    members: [user.id]
+  })
+}
+
+// 获取用户的群组列表
+export async function getUserGroups(): Promise<Group[]> {
+  const user = pb.authStore.model
+  if (!user) return []
+
+  // 通过 members 字段过滤
+  return pb.collection('groups').getList(1, 50, {
+    filter: `members ~ "${user.id}"`
+  }).then(res => res.items as unknown as Group[])
+}
+
+// 获取群组详情
+export async function getGroup(groupId: string): Promise<Group> {
+  return pb.collection('groups').getOne(groupId, {
+    expand: 'members'
+  }) as unknown as Group
+}
+
+// 加入群组
+export async function joinGroup(groupId: string) {
+  const user = pb.authStore.model
+  if (!user) throw new Error('未登录')
+
+  const group = await pb.collection('groups').getOne(groupId)
+  const members = group.members as string[]
+
+  if (members.length >= group.maxMembers) {
+    throw new Error('群组已满')
+  }
+
+  if (members.includes(user.id)) {
+    throw new Error('已是群组成员')
+  }
+
+  return pb.collection('groups').update(groupId, {
+    members: [...members, user.id]
+  })
+}
+
+// 退出群组
+export async function leaveGroup(groupId: string) {
+  const user = pb.authStore.model
+  if (!user) throw new Error('未登录')
+
+  const group = await pb.collection('groups').getOne(groupId)
+
+  if (group.owner === user.id) {
+    throw new Error('群主不能退出群组，请先转让群主或解散群组')
+  }
+
+  const members = group.members as string[]
+  return pb.collection('groups').update(groupId, {
+    members: members.filter(id => id !== user.id)
+  })
+}
+
+// 解散群组
+export async function dissolveGroup(groupId: string) {
+  const user = pb.authStore.model
+  if (!user) throw new Error('未登录')
+
+  const group = await pb.collection('groups').getOne(groupId)
+
+  if (group.owner !== user.id) {
+    throw new Error('只有群主可以解散群组')
+  }
+
+  return pb.collection('groups').delete(groupId)
+}
+
+// 订阅群组变更
+export function subscribeGroup(groupId: string, callback: (group: Group) => void) {
+  return pb.collection('groups').subscribe('*', (payload) => {
+    if (payload.record.id === groupId) {
+      callback(payload.record as unknown as Group)
+    }
+  })
+}
+
+// 获取群组成员
+export async function getGroupMembers(groupId: string) {
+  const group = await getGroup(groupId)
+  const members = group.members as string[]
+
+  // 批量获取用户信息
+  const users = await pb.collection('users').getList(1, 50, {
+    filter: members.map(id => `id="${id}"`).join(' || ')
+  })
+
+  return users.items
+}