docs(i18n): 更新 Antigravity 混合调度选项的文案

- 显示名称改为「在 /v1/messages 中使用」
- 添加更醒目的警告提示，强调 Antigravity 和 Anthropic 账号不能混用

frontend/src/i18n/locales/en.ts

@@ -1047,10 +1047,10 @@ export default {
       priority: 'Priority',
       priorityHint: 'Higher priority accounts are used first',
       higherPriorityFirst: 'Higher value means higher priority',
-      mixedScheduling: 'Mixed Scheduling',
+      mixedScheduling: 'Use in /v1/messages',
       mixedSchedulingHint: 'Enable to participate in Anthropic/Gemini group scheduling',
       mixedSchedulingTooltip:
-        'When enabled, this account can be scheduled by /v1/messages and /v1beta endpoints. Otherwise, it will only be scheduled by /antigravity. Note: Anthropic Claude and Antigravity Claude cannot be mixed in the same context. Please manage groups carefully when enabled.',
+        '!! WARNING !! Antigravity Claude and Anthropic Claude cannot be used in the same context. If you have both Anthropic and Antigravity accounts, enabling this option will cause frequent 400 errors. When enabled, please use the group feature to isolate Antigravity accounts from Anthropic accounts. Make sure you understand this before enabling!!',
       creating: 'Creating...',
       updating: 'Updating...',
       accountCreated: 'Account created successfully',

frontend/src/i18n/locales/zh.ts

@@ -1200,10 +1200,10 @@ export default {
       priority: '优先级',
       priorityHint: '优先级越高的账号优先使用',
       higherPriorityFirst: '数值越高优先级越高',
-      mixedScheduling: '混合调度',
+      mixedScheduling: '在 /v1/messages 中使用',
       mixedSchedulingHint: '启用后可参与 Anthropic/Gemini 分组的调度',
       mixedSchedulingTooltip:
-        '开启后，该账户可被 /v1/messages 及 /v1beta 端点调度，否则只被 /antigravity 调度。注意：Anthropic Claude 和 Antigravity Claude 无法在同个上下文中混合使用，开启后请自行做好分组管理。',
+        '！！注意！！ Antigravity Claude 和 Anthropic Claude 无法在同个上下文中使用，如果你同时有 Anthropic 账号和 Antigravity 账号，开启此选项会导致经常 400 报错。开启后，请用分组功能做好 Antigravity 账号和 Anthropic 账号的隔离。一定要弄明白再开启！！',
       creating: '创建中...',
       updating: '更新中...',
       accountCreated: '账号创建成功',