fix: inline xterm.css into injected style string (host never loads standalone lib/client.css, helper textarea was visible)

01_content/src/client/split.tsx

@@ -1,6 +1,6 @@
 import { Fragment, useCallback, useEffect, useRef, useState } from 'react'
 import { Terminal } from 'xterm'
-import 'xterm/css/xterm.css'
+
 import MarkdownIt from 'markdown-it'
 import hljs from 'highlight.js/lib/core'
 import hljsTypescript from 'highlight.js/lib/languages/typescript'

01_content/src/client/styles.ts

@@ -1,4 +1,9 @@
-export const css = [
+// xterm 自带样式以文本内联（宿主只加载 JS，独立的 lib/client.css 不会被注入——
+// 否则 xterm 的隐藏输入 textarea 会裸露成左上角的小输入框）
+// @ts-ignore
+import xtermCss from 'xterm/css/xterm.css'
+
+export const css = xtermCss + '\n' + [
   // 区块整体
   '.dsh-wt_section{box-sizing:border-box;display:flex;flex-direction:column;gap:6px;width:100%;padding:0}',
   '.dsh-wt_float{min-width:176px;max-width:264px;background:var(--dsw-alias-bg-base,#0b0e14);border:1px solid var(--dsw-alias-border-l2,#3a4150);border-radius:10px;padding:8px;box-shadow:var(--dsw-shadow-lv2,0 8px 24px rgba(0,0,0,.4))}',