feat(fonts): 外观设置新增界面/等宽字体选择器，含中英繁中文案

apps/app-frontend/src/locales/en-US/index.json

@@ -419,6 +419,57 @@
   "app.appearance-settings.auto-hide-downloads-button.description": {
     "message": "Hide the downloads button in the sidebar when there are no active download tasks."
   },
+  "app.appearance-settings.fonts.title": {
+    "message": "Fonts"
+  },
+  "app.appearance-settings.fonts.description": {
+    "message": "Choose the fonts the launcher interface and its logs are rendered in."
+  },
+  "app.appearance-settings.fonts.ui-font": {
+    "message": "Interface font"
+  },
+  "app.appearance-settings.fonts.ui-font-description": {
+    "message": "Used across the launcher interface. Only fonts installed on this system are listed."
+  },
+  "app.appearance-settings.fonts.mono-font": {
+    "message": "Monospace font"
+  },
+  "app.appearance-settings.fonts.mono-font-description": {
+    "message": "Used for logs, the server console, and other monospace content."
+  },
+  "app.appearance-settings.fonts.default": {
+    "message": "Launcher default"
+  },
+  "app.appearance-settings.fonts.monospace": {
+    "message": "Monospace"
+  },
+  "app.appearance-settings.fonts.missing": {
+    "message": "Not installed"
+  },
+  "app.appearance-settings.fonts.search-placeholder": {
+    "message": "Search installed fonts"
+  },
+  "app.appearance-settings.fonts.no-results": {
+    "message": "No matching fonts"
+  },
+  "app.appearance-settings.fonts.load-failed": {
+    "message": "Couldn't read the list of installed fonts."
+  },
+  "app.appearance-settings.fonts.retry": {
+    "message": "Retry"
+  },
+  "app.appearance-settings.fonts.reset": {
+    "message": "Reset"
+  },
+  "app.appearance-settings.fonts.preview": {
+    "message": "Preview"
+  },
+  "app.appearance-settings.fonts.ui-preview-sample": {
+    "message": "The quick brown fox jumps over the lazy dog."
+  },
+  "app.appearance-settings.fonts.mono-preview-sample": {
+    "message": "const x = () => 0; // monospace"
+  },
   "app.appearance-settings.auto-hide-downloads-button.title": {
     "message": "Auto-hide downloads button"
   },

apps/app-frontend/src/locales/zh-CN/index.json

@@ -640,6 +640,57 @@
   "app.appearance-settings.auto-hide-downloads-button.description": {
     "message": "没有进行中的下载任务时隐藏侧边栏中的下载按钮，有任务时自动显示。"
   },
+  "app.appearance-settings.fonts.title": {
+    "message": "字体"
+  },
+  "app.appearance-settings.fonts.description": {
+    "message": "选择启动器界面与日志使用的字体。"
+  },
+  "app.appearance-settings.fonts.ui-font": {
+    "message": "界面字体"
+  },
+  "app.appearance-settings.fonts.ui-font-description": {
+    "message": "应用于启动器界面。仅列出系统已安装的字体。"
+  },
+  "app.appearance-settings.fonts.mono-font": {
+    "message": "等宽字体"
+  },
+  "app.appearance-settings.fonts.mono-font-description": {
+    "message": "用于日志、服务器控制台等等宽内容。"
+  },
+  "app.appearance-settings.fonts.default": {
+    "message": "启动器默认"
+  },
+  "app.appearance-settings.fonts.monospace": {
+    "message": "等宽"
+  },
+  "app.appearance-settings.fonts.missing": {
+    "message": "未安装"
+  },
+  "app.appearance-settings.fonts.search-placeholder": {
+    "message": "搜索已安装的字体"
+  },
+  "app.appearance-settings.fonts.no-results": {
+    "message": "没有匹配的字体"
+  },
+  "app.appearance-settings.fonts.load-failed": {
+    "message": "无法读取已安装的字体列表。"
+  },
+  "app.appearance-settings.fonts.retry": {
+    "message": "重试"
+  },
+  "app.appearance-settings.fonts.reset": {
+    "message": "重置"
+  },
+  "app.appearance-settings.fonts.preview": {
+    "message": "预览"
+  },
+  "app.appearance-settings.fonts.ui-preview-sample": {
+    "message": "永和九年，岁在癸丑，暮春之初。"
+  },
+  "app.appearance-settings.fonts.mono-preview-sample": {
+    "message": "const x = () => 0; // 等宽"
+  },
   "app.appearance-settings.auto-hide-downloads-button.title": {
     "message": "自动隐藏下载按钮"
   },

apps/app-frontend/src/locales/zh-TW/index.json

@@ -572,6 +572,57 @@
   "app.appearance-settings.auto-hide-downloads-button.description": {
     "message": "沒有進行中的下載任務時隱藏側邊欄中的下載按鈕，有任務時自動顯示。"
   },
+  "app.appearance-settings.fonts.title": {
+    "message": "字型"
+  },
+  "app.appearance-settings.fonts.description": {
+    "message": "選擇啟動器介面與日誌使用的字型。"
+  },
+  "app.appearance-settings.fonts.ui-font": {
+    "message": "介面字型"
+  },
+  "app.appearance-settings.fonts.ui-font-description": {
+    "message": "套用於啟動器介面。僅列出系統已安裝的字型。"
+  },
+  "app.appearance-settings.fonts.mono-font": {
+    "message": "等寬字型"
+  },
+  "app.appearance-settings.fonts.mono-font-description": {
+    "message": "用於日誌、伺服器主控台等等寬內容。"
+  },
+  "app.appearance-settings.fonts.default": {
+    "message": "啟動器預設"
+  },
+  "app.appearance-settings.fonts.monospace": {
+    "message": "等寬"
+  },
+  "app.appearance-settings.fonts.missing": {
+    "message": "未安裝"
+  },
+  "app.appearance-settings.fonts.search-placeholder": {
+    "message": "搜尋已安裝的字型"
+  },
+  "app.appearance-settings.fonts.no-results": {
+    "message": "沒有符合的字型"
+  },
+  "app.appearance-settings.fonts.load-failed": {
+    "message": "無法讀取已安裝的字型清單。"
+  },
+  "app.appearance-settings.fonts.retry": {
+    "message": "重試"
+  },
+  "app.appearance-settings.fonts.reset": {
+    "message": "重設"
+  },
+  "app.appearance-settings.fonts.preview": {
+    "message": "預覽"
+  },
+  "app.appearance-settings.fonts.ui-preview-sample": {
+    "message": "永和九年，歲在癸丑，暮春之初。"
+  },
+  "app.appearance-settings.fonts.mono-preview-sample": {
+    "message": "const x = () => 0; // 等寬"
+  },
   "app.appearance-settings.auto-hide-downloads-button.title": {
     "message": "自動隱藏下載按鈕"
   },