feat(questions): make brand questions the primary monitoring & template axis

- add /questions/combination-fill endpoint with AI-driven, IP-region-aware matrix fill
- extract ip2region resolver from ops/app into shared/ipregion for cross-service use
- thread question_id filter through dashboard composite, citation summary, and collect-now
- switch template wizard from keyword inputs to brand-question selection (primary + supplemental)
- pass brand_question and supplemental_questions through assist/title/outline prompts
- add AiWaitingModal + 45s client timeout and request_timeout error mapping for long AI flows

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/admin-web/src/lib/errors.ts

@@ -97,6 +97,7 @@ const errorMessageMap: Record<string, string> = {
   publisher_plugin_unknown_error: '浏览器插件调用失败，请稍后重试',
   installation_offline: '桌面客户端未在线，请打开桌面客户端后重试',
   network_error: '网络连接失败，请稍后重试',
+  request_timeout: '请求超时，AI 生成耗时较长，请稍后重试或稍候再查看结果',
   unknown_error: '发生未知错误',
 }
 
@@ -136,13 +137,27 @@ export function isHandledAuthError(error: unknown): boolean {
   )
 }
 
+const TIMEOUT_MESSAGE_PATTERN = /^timeout of \d+ms exceeded$/i
+
+function translateRawErrorMessage(raw: string): string | null {
+  const mapped = errorMessageMap[raw]
+  if (mapped) {
+    return mapped
+  }
+  if (TIMEOUT_MESSAGE_PATTERN.test(raw)) {
+    return errorMessageMap.request_timeout
+  }
+  return null
+}
+
 export function formatError(error: unknown): string {
   if (isHandledAuthError(error)) {
     return '登录已过期，请重新登录'
   }
 
   if (error instanceof ApiClientError) {
-    const message = errorMessageMap[error.message] ?? error.message.replaceAll('_', ' ')
+    const translated = translateRawErrorMessage(error.message)
+    const message = translated ?? error.message.replaceAll('_', ' ')
     if (isAiPointsInsufficient(error)) {
       return message
     }
@@ -150,7 +165,7 @@ export function formatError(error: unknown): string {
   }
 
   if (error instanceof Error) {
-    return errorMessageMap[error.message] ?? error.message
+    return translateRawErrorMessage(error.message) ?? error.message
   }
 
   return '发生未知错误'