v1.2.0 界面双语适配

v1.2.0 界面双语适配 / Bilingual UI

新增 / New

• 插件全部文案跟随 DSH 界面语言（简体中文 / English），设置里切换语言即时生效、无需刷新
  Every string now follows the DSH interface language (zh/en); switching in Settings takes effect instantly without a refresh
• 33 工具白话文案、参数摘要、菜单、组状态、面板与卡片均有中英双语；英文缺省自动回退中文
  All 33 tool rules, argument summaries, menus, group status, panels and cards ship in both languages; English falls back to Chinese when a string is missing

验证 / Verified

• 回归 24/24（含英文态断言）+ 等价性全通过；playwright 实测中英切换（原生 ↔ Native）闭环、控制台零报错