merge: 正确合并 main 分支改动

合并 origin/main 最新改动，正确保留所有配置： - Ops 运维监控配置和功能 - LinuxDo Connect OAuth 配置 - Update 在线更新配置 - 优惠码功能 - 其他 main 分支新功能修复之前合并时错误删除 LinuxDo 和 Update 配置的问题。

merge: 正确合并 main 分支改动
合并 origin/main 最新改动，正确保留所有配置： - Ops 运维监控配置和功能 - LinuxDo Connect OAuth 配置 - Update 在线更新配置 - 优惠码功能 - 其他 main 分支新功能修复之前合并时错误删除 LinuxDo 和 Update 配置的问题。
645609d4 · IanShaw027 · fc4ea659 · 56fc2764 · 645609d4 · 645609d4
Commit 645609d4 authored Jan 11, 2026 by IanShaw027
--- a/backend/internal/service/gateway_multiplatform_test.go
+++ b/backend/internal/service/gateway_multiplatform_test.go
--- a/backend/internal/service/gateway_service.go
+++ b/backend/internal/service/gateway_service.go
--- a/backend/internal/service/gemini_messages_compat_service.go
+++ b/backend/internal/service/gemini_messages_compat_service.go
--- a/backend/internal/service/gemini_multiplatform_test.go
+++ b/backend/internal/service/gemini_multiplatform_test.go
--- a/backend/internal/service/group.go
+++ b/backend/internal/service/group.go
--- a/backend/internal/service/group_service.go
+++ b/backend/internal/service/group_service.go
--- a/backend/internal/service/openai_gateway_service.go
+++ b/backend/internal/service/openai_gateway_service.go
--- a/backend/internal/service/promo_code.go
+++ b/backend/internal/service/promo_code.go
--- a/backend/internal/service/promo_code_repository.go
+++ b/backend/internal/service/promo_code_repository.go
--- a/backend/internal/service/promo_service.go
+++ b/backend/internal/service/promo_service.go
--- a/backend/internal/service/setting_service.go
+++ b/backend/internal/service/setting_service.go
--- a/backend/internal/service/settings_view.go
+++ b/backend/internal/service/settings_view.go
--- a/backend/internal/service/wire.go
+++ b/backend/internal/service/wire.go
--- a/backend/internal/web/embed_off.go
+++ b/backend/internal/web/embed_off.go
--- a/backend/internal/web/embed_on.go
+++ b/backend/internal/web/embed_on.go
--- a/backend/internal/web/html_cache.go
+++ b/backend/internal/web/html_cache.go
--- a/backend/migrations/033_add_promo_codes.sql
+++ b/backend/migrations/033_add_promo_codes.sql
--- a/backend/repository.test
+++ b/backend/repository.test
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
--- a/frontend/src/api/admin/index.ts
+++ b/frontend/src/api/admin/index.ts