feat(affiliate): 完善邀请返利系统

- 修复返利不到账的根因：tryClaimAffiliateRebateAudit 中 PostgreSQL 参数类型推断冲突
  - 补全 OAuth 注册路径（LinuxDo/OIDC/WeChat/Pending Flow）的邀请码绑定
  - 前端 OAuth 注册页面传递 aff_code 参数
  - 新增返利冻结期机制：可配置冻结时间，到期后自动解冻（懒解冻）
  - 新增返利有效期：绑定后 N 天内有效，过期不再产生返利
  - 新增单人返利上限：超出上限部分精确截断
  - 增强返利流程 slog 结构化日志，便于排查问题
  - 已邀请用户列表增加返利明细列

frontend/src/components/auth/LinuxDoOAuthSection.vue

@@ -42,9 +42,11 @@
 <script setup lang="ts">
 import { useRoute } from 'vue-router'
 import { useI18n } from 'vue-i18n'
+import { resolveAffiliateReferralCode, storeOAuthAffiliateCode } from '@/utils/oauthAffiliate'
 
-withDefaults(defineProps<{
+const props = withDefaults(defineProps<{
   disabled?: boolean
+  affCode?: string
   showDivider?: boolean
 }>(), {
   showDivider: true
@@ -55,6 +57,7 @@ const { t } = useI18n()
 
 function startLogin(): void {
   const redirectTo = (route.query.redirect as string) || '/dashboard'
+  storeOAuthAffiliateCode(resolveAffiliateReferralCode(props.affCode, route.query.aff, route.query.aff_code))
   const apiBase = (import.meta.env.VITE_API_BASE_URL as string | undefined) || '/api/v1'
   const normalized = apiBase.replace(/\/$/, '')
   const startURL = `${normalized}/auth/oauth/linuxdo/start?redirect=${encodeURIComponent(redirectTo)}`

frontend/src/components/auth/OidcOAuthSection.vue

@@ -23,9 +23,11 @@
 import { computed } from 'vue'
 import { useRoute } from 'vue-router'
 import { useI18n } from 'vue-i18n'
+import { resolveAffiliateReferralCode, storeOAuthAffiliateCode } from '@/utils/oauthAffiliate'
 
 const props = withDefaults(defineProps<{
   disabled?: boolean
+  affCode?: string
   providerName?: string
   showDivider?: boolean
 }>(), {
@@ -45,6 +47,7 @@ const providerInitial = computed(() => normalizedProviderName.value.charAt(0).to
 
 function startLogin(): void {
   const redirectTo = (route.query.redirect as string) || '/dashboard'
+  storeOAuthAffiliateCode(resolveAffiliateReferralCode(props.affCode, route.query.aff, route.query.aff_code))
   const apiBase = (import.meta.env.VITE_API_BASE_URL as string | undefined) || '/api/v1'
   const normalized = apiBase.replace(/\/$/, '')
   const startURL = `${normalized}/auth/oauth/oidc/start?redirect=${encodeURIComponent(redirectTo)}`

frontend/src/components/auth/WechatOAuthSection.vue

@@ -33,9 +33,11 @@ import { useRoute } from 'vue-router'
 import { useI18n } from 'vue-i18n'
 import { resolveWeChatOAuthStart } from '@/api/auth'
 import { useAppStore } from '@/stores'
+import { resolveAffiliateReferralCode, storeOAuthAffiliateCode } from '@/utils/oauthAffiliate'
 
 const props = withDefaults(defineProps<{
   disabled?: boolean
+  affCode?: string
   showDivider?: boolean
 }>(), {
   showDivider: true,
@@ -84,6 +86,7 @@ function startLogin(): void {
     return
   }
   const redirectTo = (route.query.redirect as string) || '/dashboard'
+  storeOAuthAffiliateCode(resolveAffiliateReferralCode(props.affCode, route.query.aff, route.query.aff_code))
   const apiBase = (import.meta.env.VITE_API_BASE_URL as string | undefined) || '/api/v1'
   const normalized = apiBase.replace(/\/$/, '')
   const mode = resolvedStart.value.mode