feat: add invite rewards and redeem codes

.trellis/tasks/05-21-referral-recovery-and-redeem-cards/task.json

@@ -0,0 +1,40 @@
+{
+  "id": "referral-recovery-and-redeem-cards",
+  "name": "referral-recovery-and-redeem-cards",
+  "title": "恢复邀请体系并新增兑换卡密系统",
+  "description": "恢复邀请绑定与绑定后 Creem 充值奖励链路，并新增运营卡密生成/兑换系统，要求补齐协议、数据库、积分账本、系统审计，以及 web 端邀请页与兑换入口。",
+  "status": "in_progress",
+  "dev_type": null,
+  "scope": null,
+  "package": null,
+  "priority": "P1",
+  "creator": "zl-q",
+  "assignee": "zl-q",
+  "createdAt": "2026-05-21",
+  "completedAt": null,
+  "branch": null,
+  "base_branch": "dev",
+  "worktree_path": null,
+  "commit": null,
+  "pr_url": null,
+  "subtasks": [],
+  "children": [],
+  "parent": null,
+  "relatedFiles": [
+    "docs/protocols/invite/invite-protocol.md",
+    "docs/protocols/common/user-points-chat-data-protocol.md",
+    "docs/protocols/common/http-error-codes.md",
+    "backend/src/v1/invite/router.py",
+    "backend/src/v1/invite/service.py",
+    "backend/src/v1/points/service.py",
+    "backend/src/v1/payments/service.py",
+    "backend/src/v1/payments/creem_service.py",
+    "web/src/components/SettingsPage.tsx",
+    "web/src/lib/api.ts",
+    "web/src/lib/api-routes.ts",
+    "web/src/lib/resources.ts",
+    "web/src/i18n/utils.ts"
+  ],
+  "notes": "先完成协议与 PRD，再落地实现。只做 web 端，不改 Flutter。邀请绑定奖励达成以 creem 成功交易为准，卡密兑换不算充值成功。",
+  "meta": {}
+}