feat(settings): organize system preferences by category

public/locales/en.json

@@ -215,6 +215,25 @@
     "goals": { "label": "Goal countdown", "description": "Show the nearest active goal with a target date.", "title": "Goal countdown", "days": "{name}: {count} days left.", "today": "{name}: target date is today.", "overdue": "{name}: {count} days past the target date." },
     "test": { "title": "Life OS notifications are ready", "body": "Your browser can show reminders from Life OS.", "failed": "Could not show the test notification." }
   },
+  "systemNav": {
+    "settings": "SETTINGS",
+    "navigation": "Settings categories",
+    "home": "Home",
+    "appearance": "Personalization",
+    "notifications": "Notifications",
+    "language": "Language",
+    "data": "Data & backup",
+    "about": "About",
+    "homeHint": "Choose a category to manage your Life OS preferences.",
+    "device": "This browser",
+    "deviceHint": "Your personal Life OS workspace",
+    "version": "v{version}",
+    "quickSettings": "Settings at a glance",
+    "appearanceHint": "Theme, wallpaper, desktop icons and widgets",
+    "notificationsHint": "Memory, tasks and goal reminders",
+    "languageHint": "Browser language and manual selection",
+    "dataHint": "Import, export and local storage"
+  },
   "system": {
     "eyebrow": "SYSTEM SETTINGS",
     "title": "System, local and yours.",

public/locales/zh-CN.json

@@ -215,6 +215,25 @@
     "goals": { "label": "目标倒计时", "description": "显示最近一个有目标日期的进行中目标。", "title": "目标倒计时", "days": "{name}：还有 {count} 天。", "today": "{name}：目标日期就是今天。", "overdue": "{name}：已超过目标日期 {count} 天。" },
     "test": { "title": "Life OS 通知已就绪", "body": "浏览器可以显示来自 Life OS 的提醒。", "failed": "测试通知发送失败。" }
   },
+  "systemNav": {
+    "settings": "设置",
+    "navigation": "设置分类",
+    "home": "主页",
+    "appearance": "个性化",
+    "notifications": "通知",
+    "language": "语言",
+    "data": "数据与备份",
+    "about": "关于",
+    "homeHint": "选择分类，管理你的 Life OS 设置。",
+    "device": "此浏览器",
+    "deviceHint": "你的 Life OS 个人空间",
+    "version": "v{version}",
+    "quickSettings": "常用设置",
+    "appearanceHint": "主题、壁纸、桌面图标和小部件",
+    "notificationsHint": "记忆、待办和目标提醒",
+    "languageHint": "浏览器语言与手动选择",
+    "dataHint": "导入、导出与本地存储"
+  },
   "system": {
     "eyebrow": "系统设置",
     "title": "你的个人系统。",