feat: 添加会话关闭功能及确认对话框，更新相关国际化文本

ccw/frontend/src/locales/en/cli-manager.json

@@ -227,6 +227,7 @@
     "turns": "turns",
     "perTurnView": "Per-Turn View",
     "concatenatedView": "Concatenated View",
+    "nativeView": "Native View",
     "userPrompt": "User Prompt",
     "assistantResponse": "Assistant Response",
     "errors": "Errors",

ccw/frontend/src/locales/en/terminal-dashboard.json

@@ -147,11 +147,15 @@
     "splitVertical": "Split Down",
     "clearTerminal": "Clear Terminal",
     "closePane": "Close Pane",
+    "closeSession": "Close Session",
     "linkedIssue": "Linked Issue",
     "restart": "Restart Session",
     "pause": "Pause Session",
     "resume": "Resume Session",
-    "backToTerminal": "Back to terminal"
+    "backToTerminal": "Back to terminal",
+    "closeConfirmTitle": "Close Pane?",
+    "closeConfirmMessage": "The session will still exist and can be restored from the session tree.",
+    "closeConfirmAction": "Close Pane"
   },
   "tabBar": {
     "noTabs": "No terminal sessions"