i18n(docker): translate the attach panel, and unblock translation

The new strings were English only. Adding entries surfaced a deeper problem: the
translator matches whole text nodes and skips `code`/`pre`, so an inline `<code>`
mid-sentence splits a hint into fragments that can never match an entry — which is
why the panel's existing "Build it once with <code>...</code>" hint was never
translated either.

Drops the inline markup from the new hints so each is a single text node, then
adds the zh-CN entries. The brand name goes through the existing {name}
placeholder.

Server-side error bodies are deliberately not added: the client receives them
already interpolated with a concrete container name, so a template key could
never match.

src/web/public/i18n.js

@@ -713,6 +713,19 @@
     'Runs this case in a hardened, isolated container. The base image is built automatically on first use. Docker/Podman must be installed.':
       '在加固的隔离容器中运行此案例。首次使用时会自动构建基础镜像；必须安装 Docker/Podman。',
     'Run in an isolated Docker container': '在隔离的 Docker 容器中运行',
+    'Attach to an existing container': '接入已在运行的容器',
+    'On: Codeman only runs docker exec into a container you already built and run — it never creates, starts, stops or removes it. The CLIs must already be installed and logged in inside it.':
+      '开启后，{name}只会 docker exec 进入你自己构建并运行的容器，绝不创建、启动、停止或删除它；容器内必须已安装并登录好相应 CLI。',
+    'Container Name': '容器名称',
+    'Must be running already.': '该容器必须已在运行。',
+    'Check container': '检查容器',
+    'Container Workdir': '容器内工作目录',
+    'A path that already exists inside the container. Adoption mounts nothing, so this need not match the host workspace path.':
+      '容器内已存在的路径。接入不挂载任何目录，因此它不必与主机工作区路径相同。',
+    'Already have a container running?': '已经有正在运行的容器？',
+    'Attach to it instead': '改为接入该容器',
+    'Codeman only runs docker exec into it and never touches its lifecycle.':
+      '{name}只会 docker exec 进入它，绝不触碰其生命周期。',
     'Absolute HOST directory, bind-mounted into the container. Codeman scaffolds CLAUDE.md + hooks into it.':
       '绑定挂载到容器中的主机绝对目录；{name}会在其中生成 CLAUDE.md 和 hooks。',
     'A reusable docker host profile. Reuse the same ID across cases to share settings.':