fix(shared): i18n coverage and contract updates

- keyPath field no longer tells users to enter a server-side path
- settings.highlight.builtin.* notes, timeout messages in four languages
- prototype-safe dictionary lookup; language as a render-time dependency
- Partial<AppSettings> saveSettings contract, update:stateGet channel

src/shared/i18n/dicts/zh-TW/settings.ts

@@ -92,6 +92,11 @@ const settings: Record<string, string> = {
     '搭配全域鍵可在任何畫面喚出／隱藏視窗；若註冊失敗（與其他軟體衝突）則不會生效，應用程式也不會報錯。',
   'settings.system.shortcutRecording': '請按下組合鍵…',
   'settings.system.shortcutPlaceholder': '點擊後按下快速鍵，留空為停用',
+  'settings.system.shortcutConflict':
+    '此組合鍵已被應用內快捷鍵佔用（Ctrl+= / Ctrl+- / Ctrl+0 / Ctrl+PgUp / Ctrl+PgDn），請換一個。',
+  'settings.resetTerminal': '恢復預設終端設定',
+  'settings.resetTerminalTitle': '恢復預設終端設定？',
+  'settings.resetTerminalDesc': '字體、游標、渲染與主題等全部終端設定將恢復為預設值。',
   'settings.highlight.alert':
     '自訂高亮可強化顯示效果，但會略微增加效能負擔。規則依優先順序套用。PS：高亮是在寫入終端時注入顏色，對既有的回捲內容不生效',
   'settings.highlight.enabled': '啟用',
@@ -115,6 +120,17 @@ const settings: Record<string, string> = {
   'settings.highlight.resetOk': '還原',
   'settings.highlight.createTitle': '新增高亮規則',
   'settings.highlight.editTitle': '編輯高亮規則',
+  'settings.highlight.builtin.perm': 'Linux 權限與使用者',
+  'settings.highlight.builtin.path': 'Linux 檔案路徑',
+  'settings.highlight.builtin.shellkw': 'Shell 關鍵字與流程',
+  'settings.highlight.builtin.okstate': '成功狀態',
+  'settings.highlight.builtin.badstate': '錯誤/警告狀態',
+  'settings.highlight.builtin.quoted': '字串與引號',
+  'settings.highlight.builtin.envvar': '環境變數與參數',
+  'settings.highlight.builtin.ipv4': '網路與 IP 位址',
+  'settings.highlight.builtin.datetime': '時間與日期',
+  'settings.highlight.builtin.numbers': '數字與計數',
+  'settings.highlight.builtin.url': '網址連結',
   'settings.theme.accent': '標籤強調色',
   'settings.theme.accentDesc': '作用中標籤的邊框、側邊欄指示條與 SSH 徽章的強調顏色',
   'settings.theme.customBadge': '自訂',