feat: phase 4 - 积分竞猜和游戏黑名单 v0.3.0

竞猜功能：发起竞猜、下注、关闭、开奖、奖池分配
黑名单功能：标记游戏、按原因/严重程度筛选、详情展开
修复：双重结算、TOCTOU竞态、订阅泄漏、选项选择兼容性

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

frontend/src/api/gameBlacklist.ts

@@ -0,0 +1,57 @@
+import { pb } from './pocketbase'
+import type { BlacklistEntry } from '@/types'
+
+export async function createBlacklistEntry(data: {
+  group: string
+  game?: string
+  gameName: string
+  reason: string
+  description: string
+  severity: string
+}): Promise<BlacklistEntry> {
+  const user = pb.authStore.model
+  if (!user) throw new Error('未登录')
+
+  const payload: Record<string, any> = {
+    group: data.group,
+    reporter: user.id,
+    gameName: data.gameName,
+    reason: data.reason,
+    description: data.description,
+    severity: data.severity,
+  }
+  if (data.game) payload.game = data.game
+
+  const record = await pb.collection('game_blacklist').create(payload)
+  return record as unknown as BlacklistEntry
+}
+
+export async function listBlacklist(
+  groupId: string,
+  options?: { reason?: string; severity?: string }
+): Promise<BlacklistEntry[]> {
+  let filter = `group="${groupId}"`
+  if (options?.reason) filter += ` && reason="${options.reason}"`
+  if (options?.severity) filter += ` && severity="${options.severity}"`
+
+  const result = await pb.collection('game_blacklist').getFullList({
+    filter,
+    sort: '-created',
+    expand: 'reporter,game',
+    $autoCancel: false,
+  })
+  return result as unknown as BlacklistEntry[]
+}
+
+export async function deleteBlacklistEntry(entryId: string): Promise<void> {
+  await pb.collection('game_blacklist').delete(entryId)
+}
+
+export async function subscribeBlacklist(
+  groupId: string,
+  callback: (data: any) => void
+): Promise<() => void> {
+  return pb.collection('game_blacklist').subscribe('*', (data) => {
+    if (data.record?.group === groupId) callback(data)
+  })
+}