fix: replace hardcoded Chinese strings in settings with i18n keys

src/components/settings/sections/about-section.tsx

@@ -1,7 +1,9 @@
 import { useEffect, useState } from "react"
+import { useTranslation } from "react-i18next"
 import { clipServerStatus } from "@/commands/fs"
 
 export function AboutSection() {
+  const { t } = useTranslation()
   const [clipStatus, setClipStatus] = useState<string>("...")
 
   useEffect(() => {
@@ -19,16 +21,16 @@ export function AboutSection() {
   }, [])
 
   const rows: Array<{ label: string; value: string; mono?: boolean }> = [
-    { label: "版本", value: `v${__APP_VERSION__}`, mono: true },
-    { label: "Clip Server", value: `${clipStatus}  @  127.0.0.1:19827`, mono: true },
+    { label: t("settings.aboutVersion"), value: `v${__APP_VERSION__}`, mono: true },
+    { label: t("settings.aboutClipServer"), value: `${clipStatus}  @  127.0.0.1:19827`, mono: true },
   ]
 
   return (
     <div className="space-y-6">
       <div>
-        <h2 className="text-xl font-semibold">关于</h2>
+        <h2 className="text-xl font-semibold">{t("settings.aboutHeading")}</h2>
         <p className="mt-1 text-sm text-muted-foreground">
-          构建信息和运行时状态。
+          {t("settings.aboutDescription")}
         </p>
       </div>
 

src/components/settings/sections/embedding-section.tsx

@@ -1,3 +1,4 @@
+import { useTranslation } from "react-i18next"
 import { Input } from "@/components/ui/input"
 import { Label } from "@/components/ui/label"
 import type { SettingsDraft, DraftSetter } from "../settings-types"
@@ -8,21 +9,22 @@ interface Props {
 }
 
 export function EmbeddingSection({ draft, setDraft }: Props) {
+  const { t } = useTranslation()
+
   return (
     <div className="space-y-6">
       <div>
-        <h2 className="text-xl font-semibold">向量嵌入</h2>
+        <h2 className="text-xl font-semibold">{t("settings.embeddingHeading")}</h2>
         <p className="mt-1 text-sm text-muted-foreground">
-          启用语义搜索。对任何 OpenAI 兼容的 /v1/embeddings endpoint 工作。
-          本地模型(如 LM Studio、Ollama embedding)不需要 API Key。
+          {t("settings.embeddingDescription")}
         </p>
       </div>
 
       <div className="flex items-center justify-between rounded-md border p-3">
         <div>
-          <div className="text-sm font-medium">启用向量搜索</div>
+          <div className="text-sm font-medium">{t("settings.embeddingEnable")}</div>
           <div className="text-xs text-muted-foreground">
-            关掉后搜索只走 token 匹配。
+            {t("settings.embeddingEnableHint")}
           </div>
         </div>
         <button
@@ -57,7 +59,7 @@ export function EmbeddingSection({ draft, setDraft }: Props) {
               type="password"
               value={draft.embeddingApiKey}
               onChange={(e) => setDraft("embeddingApiKey", e.target.value)}
-              placeholder="本地模型留空即可"
+              placeholder={t("settings.embeddingApiKeyPlaceholder")}
             />
           </div>
 

src/components/settings/sections/interface-section.tsx

@@ -1,3 +1,4 @@
+import { useTranslation } from "react-i18next"
 import { Label } from "@/components/ui/label"
 import type { SettingsDraft, DraftSetter } from "../settings-types"
 
@@ -12,17 +13,19 @@ const UI_LANGUAGES = [
 ]
 
 export function InterfaceSection({ draft, setDraft }: Props) {
+  const { t } = useTranslation()
+
   return (
     <div className="space-y-6">
       <div>
-        <h2 className="text-xl font-semibold">界面</h2>
+        <h2 className="text-xl font-semibold">{t("settings.interfaceHeading")}</h2>
         <p className="mt-1 text-sm text-muted-foreground">
-          应用 UI 的显示语言。切换后立即生效并持久化。
+          {t("settings.interfaceDescription")}
         </p>
       </div>
 
       <div className="space-y-2">
-        <Label>UI 语言</Label>
+        <Label>{t("settings.uiLanguage")}</Label>
         <div className="flex flex-wrap gap-2">
           {UI_LANGUAGES.map((l) => {
             const active = draft.uiLanguage === l.value
@@ -43,7 +46,7 @@ export function InterfaceSection({ draft, setDraft }: Props) {
           })}
         </div>
         <p className="text-xs text-muted-foreground">
-          只影响按钮、标签这些 UI 文案,不影响 AI 输出语言(那个在"输出偏好"里单独设置)。
+          {t("settings.uiLanguageHint")}
         </p>
       </div>
     </div>

src/components/settings/sections/output-section.tsx

@@ -1,3 +1,4 @@
+import { useTranslation } from "react-i18next"
 import { Label } from "@/components/ui/label"
 import type { SettingsDraft, DraftSetter } from "../settings-types"
 
@@ -33,20 +34,21 @@ const LANGUAGE_OPTIONS = [
 const HISTORY_OPTIONS = [2, 4, 6, 8, 10, 20]
 
 export function OutputSection({ draft, setDraft }: Props) {
+  const { t } = useTranslation()
+
   return (
     <div className="space-y-6">
       <div>
-        <h2 className="text-xl font-semibold">输出偏好</h2>
+        <h2 className="text-xl font-semibold">{t("settings.outputHeading")}</h2>
         <p className="mt-1 text-sm text-muted-foreground">
-          控制 AI 生成内容的语言和对话上下文长度。
+          {t("settings.outputDescription")}
         </p>
       </div>
 
       <div className="space-y-2">
-        <Label>AI 输出语言</Label>
+        <Label>{t("settings.outputLanguageLabel")}</Label>
         <p className="text-xs text-muted-foreground">
-          强制 AI 生成内容（chat 回复、wiki 页面、research 结果、lint 报告）使用指定语言。
-          选 "Auto" 让 AI 跟随用户输入或源文档的语言。
+          {t("settings.outputLanguageHint")}
         </p>
         <select
           value={draft.outputLanguage}
@@ -62,9 +64,9 @@ export function OutputSection({ draft, setDraft }: Props) {
       </div>
 
       <div className="space-y-2">
-        <Label>对话历史长度</Label>
+        <Label>{t("settings.historyLength")}</Label>
         <p className="text-xs text-muted-foreground">
-          每次请求发给 AI 的历史消息条数。多 = 上下文更完整但更费 token。
+          {t("settings.historyLengthHint")}
         </p>
         <div className="flex flex-wrap gap-2">
           {HISTORY_OPTIONS.map((n) => {
@@ -86,7 +88,10 @@ export function OutputSection({ draft, setDraft }: Props) {
           })}
         </div>
         <p className="text-xs text-muted-foreground">
-          当前 {draft.maxHistoryMessages} 条消息（约 {draft.maxHistoryMessages / 2} 轮对话）
+          {t("settings.historyLengthCurrent", {
+            count: draft.maxHistoryMessages,
+            turns: Math.floor(draft.maxHistoryMessages / 2),
+          })}
         </p>
       </div>
     </div>

src/i18n/en.json

@@ -92,7 +92,27 @@
     "save": "Save Settings",
     "saved": "Saved!",
     "language": "Language",
-    "languageHint": "Interface language (wiki content follows source material language)"
+    "languageHint": "Interface language (wiki content follows source material language)",
+    "interfaceHeading": "Interface",
+    "interfaceDescription": "Display language for the application UI. Changes take effect immediately and are persisted.",
+    "uiLanguage": "UI Language",
+    "uiLanguageHint": "Affects only UI labels and buttons, not AI output language (configure that under Output Preferences).",
+    "outputHeading": "Output Preferences",
+    "outputDescription": "Control the language and context length for AI-generated content.",
+    "outputLanguageLabel": "AI Output Language",
+    "outputLanguageHint": "Force AI-generated content (chat replies, wiki pages, research results, lint reports) to use the specified language. Choose \"Auto\" to follow the user's input or source document language.",
+    "historyLength": "Conversation History Length",
+    "historyLengthHint": "Number of past messages sent to the AI per request. More = richer context but higher token cost.",
+    "historyLengthCurrent": "Currently {{count}} messages (~{{turns}} turns)",
+    "embeddingHeading": "Vector Embeddings",
+    "embeddingDescription": "Enables semantic search. Works with any OpenAI-compatible /v1/embeddings endpoint. No API key needed for local models (e.g. LM Studio, Ollama).",
+    "embeddingEnable": "Enable Vector Search",
+    "embeddingEnableHint": "When off, search uses token matching only.",
+    "embeddingApiKeyPlaceholder": "Leave blank for local models",
+    "aboutHeading": "About",
+    "aboutDescription": "Build information and runtime status.",
+    "aboutVersion": "Version",
+    "aboutClipServer": "Clip Server"
   },
   "preview": {
     "selectFile": "Select a file to preview",

src/i18n/zh.json

@@ -92,7 +92,27 @@
     "save": "保存设置",
     "saved": "已保存！",
     "language": "语言",
-    "languageHint": "界面语言（Wiki 内容语言以原始资料为准）"
+    "languageHint": "界面语言（Wiki 内容语言以原始资料为准）",
+    "interfaceHeading": "界面",
+    "interfaceDescription": "应用 UI 的显示语言。切换后立即生效并持久化。",
+    "uiLanguage": "UI 语言",
+    "uiLanguageHint": "只影响按钮、标签这些 UI 文案，不影响 AI 输出语言（那个在"输出偏好"里单独设置）。",
+    "outputHeading": "输出偏好",
+    "outputDescription": "控制 AI 生成内容的语言和对话上下文长度。",
+    "outputLanguageLabel": "AI 输出语言",
+    "outputLanguageHint": "强制 AI 生成内容（chat 回复、wiki 页面、research 结果、lint 报告）使用指定语言。选 \"Auto\" 让 AI 跟随用户输入或源文档的语言。",
+    "historyLength": "对话历史长度",
+    "historyLengthHint": "每次请求发给 AI 的历史消息条数。多 = 上下文更完整但更费 token。",
+    "historyLengthCurrent": "当前 {{count}} 条消息（约 {{turns}} 轮对话）",
+    "embeddingHeading": "向量嵌入",
+    "embeddingDescription": "启用语义搜索。对任何 OpenAI 兼容的 /v1/embeddings endpoint 工作。本地模型（如 LM Studio、Ollama embedding）不需要 API Key。",
+    "embeddingEnable": "启用向量搜索",
+    "embeddingEnableHint": "关掉后搜索只走 token 匹配。",
+    "embeddingApiKeyPlaceholder": "本地模型留空即可",
+    "aboutHeading": "关于",
+    "aboutDescription": "构建信息和运行时状态。",
+    "aboutVersion": "版本",
+    "aboutClipServer": "Clip Server"
   },
   "preview": {
     "selectFile": "选择文件以预览",