fix: Fixed bug with playground

frontend/src/App.tsx

@@ -22,6 +22,32 @@ function displayError(error: unknown, t: Translate) {
   return apiErrorMessage(error instanceof ApiError ? error.code : undefined, t)
 }
 
+async function copyText(value: string): Promise<boolean> {
+  if (navigator.clipboard?.writeText) {
+    try {
+      await navigator.clipboard.writeText(value)
+      return true
+    } catch { /* Fall back when clipboard access is denied. */ }
+  }
+
+  const field = document.createElement("textarea")
+  field.value = value
+  field.readOnly = true
+  field.style.position = "fixed"
+  field.style.opacity = "0"
+  const focused = document.activeElement instanceof HTMLElement ? document.activeElement : null
+  document.body.appendChild(field)
+  field.select()
+  try {
+    return document.execCommand("copy")
+  } catch {
+    return false
+  } finally {
+    field.remove()
+    focused?.focus()
+  }
+}
+
 function loadAvailableModels(): Promise<{ models: Model[] }> {
   return api("/internal/models")
 }
@@ -142,6 +168,7 @@ function Keys({ csrf }: { csrf: string }) {
   const [rawKey, setRawKey] = useState("")
   const [showCreate, setShowCreate] = useState(false)
   const [error, setError] = useState<unknown>(null)
+  const [copyError, setCopyError] = useState(false)
   const [busy, setBusy] = useState(false)
   const reload = () => api<ApiKey[]>("/internal/api-keys").then(setKeys).catch(setError)
   useEffect(() => { void reload() }, [])
@@ -153,6 +180,7 @@ function Keys({ csrf }: { csrf: string }) {
     try {
       const created = await api<{ key: string }>("/internal/api-keys", { method: "POST", body: JSON.stringify({ name }) }, csrf)
       setRawKey(created.key)
+      setCopyError(false)
       setName("")
       setShowCreate(false)
       await reload()
@@ -173,10 +201,15 @@ function Keys({ csrf }: { csrf: string }) {
     }
   }
 
+  async function copyKey() {
+    setCopyError(false)
+    if (!await copyText(rawKey)) setCopyError(true)
+  }
+
   return <>
     <PageTitle title={t("apiKeys")} description={t("keysDescription")} action={<Button onClick={() => setShowCreate(true)}><Plus size={16} /> {t("createKey")}</Button>} />
     {error ? <div className="form-error" role="alert">{displayError(error, t)}</div> : null}
-    {rawKey ? <div className="key-reveal"><div><strong>{t("saveKeyTitle")}</strong><p>{t("saveKeyDescription")}</p></div><div className="key-value"><code>{rawKey}</code><Button variant="outline" size="sm" onClick={() => navigator.clipboard.writeText(rawKey)}><Copy size={14} /> {t("copy")}</Button></div><button aria-label={t("closeKeyNotice")} onClick={() => setRawKey("")}><X size={18} /></button></div> : null}
+    {rawKey ? <div className="key-reveal"><div><strong>{t("saveKeyTitle")}</strong><p>{t("saveKeyDescription")}</p>{copyError ? <p className="form-error" role="alert">{t("copyManually")}</p> : null}</div><div className="key-value"><code>{rawKey}</code><Button variant="outline" size="sm" onClick={() => void copyKey()}><Copy size={14} /> {t("copy")}</Button></div><button aria-label={t("closeKeyNotice")} onClick={() => setRawKey("")}><X size={18} /></button></div> : null}
     <div className="section-head"><h2>{t("keyList")}</h2><span>{t("keyCount", { count: keys.length })}</span></div>
     {keys.length === 0 ? <div className="empty"><KeyRound size={23} /><h3>{t("noKey")}</h3><p>{t("noKeyDescription")}</p><Button variant="outline" onClick={() => setShowCreate(true)}>{t("createKey")}</Button></div> :
       <div className="table-wrap"><table><thead><tr><th>{t("name")}</th><th>{t("key")}</th><th>{t("createdAt")}</th><th>{t("lastUsed")}</th><th>{t("status")}</th><th></th></tr></thead><tbody>{keys.map(key =>

frontend/src/Playground.tsx

@@ -34,8 +34,10 @@ class DraftError extends Error {
   constructor(readonly key: MessageKey, readonly values?: Record<string, string | number>) { super(key) }
 }
 
+let nextQuestionUid = 0
+
 function makeQuestion(type: QuestionType = "noul"): Question {
-  return { uid: crypto.randomUUID(), id: "", type, instructions: "", choices: [{ label: "", description: "" }, { label: "", description: "" }], levels: ["", ""] }
+  return { uid: String(++nextQuestionUid), id: "", type, instructions: "", choices: [{ label: "", description: "" }, { label: "", description: "" }], levels: ["", ""] }
 }
 
 function parseDraft(value: string): Draft {

frontend/src/i18n.tsx

@@ -36,6 +36,7 @@ const zhCN = {
   saveKeyTitle: "请立即保存这把密钥",
   saveKeyDescription: "关闭后将无法再次查看完整密钥。",
   copy: "复制",
+  copyManually: "浏览器无法自动复制，请手动选中并复制上方密钥。",
   closeKeyNotice: "关闭密钥提示",
   keyList: "密钥的列表",
   keyCount: "{count} 把密钥",
@@ -176,6 +177,7 @@ const en: Record<MessageKey, string> = {
   saveKeyTitle: "Save this key now",
   saveKeyDescription: "You cannot view the full key again after closing this notice.",
   copy: "Copy",
+  copyManually: "Your browser could not copy the key. Select and copy it manually above.",
   closeKeyNotice: "Close key notice",
   keyList: "Keys",
   keyCount: "Total keys: {count}",
@@ -314,6 +316,7 @@ const zhTW: Record<MessageKey, string> = {
   saveKeyTitle: "請立即儲存這把金鑰",
   saveKeyDescription: "關閉提示後將無法再次查看完整金鑰。",
   copy: "複製",
+  copyManually: "瀏覽器無法自動複製，請手動選取並複製上方金鑰。",
   closeKeyNotice: "關閉金鑰提示",
   keyList: "金鑰列表",
   keyCount: "{count} 把金鑰",