fix: 编码套餐默认启用深度推理

- 区分编码套餐与模型推理概念
- 编码套餐切换时默认开启深度推理
- 更新中英文提示文案

frontend/src/locales/en-US.json

@@ -8420,7 +8420,7 @@
     "durationM": "{{mins}}m",
     "emptyConvHint": "No conversations yet; enter a question to start chatting with the AI assistant",
     "enableLlm": "Enable LLM Service",
-    "enableReasoning": "Enable reasoning mode",
+    "enableReasoning": "Enable deep reasoning",
     "endpointLabel": "Endpoint",
     "endpointModelHint": "Enter the endpoint ID created in the provider console",
     "errorOccurred": "An error occurred",
@@ -8664,9 +8664,9 @@
     "reasoningHigh": "High",
     "reasoningLow": "Low",
     "reasoningMedium": "Medium",
-    "reasoningModelHint": "For reasoning models such as OpenAI GPT-5 / o-series, DeepSeek R1, and Claude Sonnet / Opus 4.",
+    "reasoningModelHint": "Enabled by default for Coding Plans; adjust it for model capabilities such as GPT-5 / o-series, DeepSeek R1, and Claude Sonnet / Opus 4.",
     "reasoningOn": "Reasoning mode is on",
-    "reasoningPlanMode": "Reasoning / Plan Mode",
+    "reasoningPlanMode": "Deep Reasoning",
     "recommended": "Recommended",
     "regenerate": "Regenerate",
     "rejectedExec": "Execution rejected: {{cmd}}",

frontend/src/locales/zh-CN.json

@@ -8420,7 +8420,7 @@
     "durationM": "{{mins}}分钟",
     "emptyConvHint": "暂无对话记录，输入问题开始与 AI 助手对话",
     "enableLlm": "启用 LLM 服务",
-    "enableReasoning": "启用推理模式",
+    "enableReasoning": "启用深度推理",
     "endpointLabel": "接口地址（Endpoint）",
     "endpointModelHint": "请填写在提供商控制台创建的接入点 ID",
     "errorOccurred": "发生错误",
@@ -8664,9 +8664,9 @@
     "reasoningHigh": "高",
     "reasoningLow": "低",
     "reasoningMedium": "中",
-    "reasoningModelHint": "适用于 OpenAI GPT-5 / o-series、DeepSeek R1、Claude Sonnet / Opus 4 等推理模型。",
+    "reasoningModelHint": "编码套餐默认开启；也可按模型能力调整，适用于 GPT-5 / o-series、DeepSeek R1、Claude Sonnet / Opus 4 等。",
     "reasoningOn": "推理模式已开启",
-    "reasoningPlanMode": "推理 / Plan 模式",
+    "reasoningPlanMode": "深度推理",
     "recommended": "推荐",
     "regenerate": "重新生成",
     "rejectedExec": "已拒绝执行：{{cmd}}",