feat(openai): 增加 gpt-5.4 模型支持与定价配置

- 接入 gpt-5.4 模型识别与规范化，补充默认模型列表
- 增加 gpt-5.4 输入/缓存命中/输出价格与计费兜底逻辑
- 同步前端模型白名单与 OpenCode 上下文窗口（1050000/128000）

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
(cherry picked from commit 924476dcac6181cd0f3ee731ec7b73672ff03793)

frontend/src/components/account/BulkEditAccountModal.vue

@@ -951,6 +951,7 @@ const allModels = [
   { value: 'claude-3-haiku-20240307', label: 'Claude 3 Haiku' },
   { value: 'gpt-5.3-codex', label: 'GPT-5.3 Codex' },
   { value: 'gpt-5.3-codex-spark', label: 'GPT-5.3 Codex Spark' },
+  { value: 'gpt-5.4', label: 'GPT-5.4' },
   { value: 'gpt-5.2-2025-12-11', label: 'GPT-5.2' },
   { value: 'gpt-5.2-codex', label: 'GPT-5.2 Codex' },
   { value: 'gpt-5.1-codex-max', label: 'GPT-5.1 Codex Max' },
@@ -1065,6 +1066,12 @@ const presetMappings = [
     to: 'gpt-5.3-codex-spark',
     color: 'bg-emerald-100 text-emerald-700 hover:bg-emerald-200 dark:bg-emerald-900/30 dark:text-emerald-400'
   },
+  {
+    label: 'GPT-5.4',
+    from: 'gpt-5.4',
+    to: 'gpt-5.4',
+    color: 'bg-rose-100 text-rose-700 hover:bg-rose-200 dark:bg-rose-900/30 dark:text-rose-400'
+  },
   {
     label: '5.2→5.3',
     from: 'gpt-5.2-codex',

frontend/src/components/keys/UseKeyModal.vue

@@ -670,6 +670,22 @@ function generateOpenCodeConfig(platform: string, baseUrl: string, apiKey: strin
         xhigh: {}
       }
     },
+    'gpt-5.4': {
+      name: 'GPT-5.4',
+      limit: {
+        context: 1050000,
+        output: 128000
+      },
+      options: {
+        store: false
+      },
+      variants: {
+        low: {},
+        medium: {},
+        high: {},
+        xhigh: {}
+      }
+    },
     'gpt-5.3-codex-spark': {
       name: 'GPT-5.3 Codex Spark',
       limit: {