fix: remove iframe general chat entry

frontend-web/src/pages/IframeChatPage.tsx

@@ -1,7 +1,6 @@
 "use client";
 
 import {
-  ArrowRightIcon,
   BookMarkedIcon,
   BotIcon,
   BrainCircuitIcon,
@@ -709,7 +708,7 @@ export default function IframeChatPage() {
                   <div className="mb-6 flex min-h-40 flex-col items-center justify-center px-4 text-center">
                     <div className="text-2xl font-medium">你好</div>
                     <div className="mt-2 text-sm text-muted-foreground">
-                      选择智能体进入问答，或直接使用通用问答
+                      选择智能体进入问答
                     </div>
                     <div className="mt-4 flex flex-wrap items-center justify-center gap-2">
                       <label className="relative inline-flex h-9 min-w-40 items-center rounded-full border border-[#eee3d5] bg-[#fffaf5] px-3 text-[#7e6a57] shadow-sm transition-colors hover:bg-white">
@@ -740,21 +739,10 @@ export default function IframeChatPage() {
                           ▾
                         </span>
                       </label>
-                      <Button
-                        type="button"
-                        variant="outline"
-                        size="sm"
-                        disabled={isUploading}
-                        onClick={() => enterStandardChat()}
-                        className="rounded-full"
-                      >
-                        直接进入通用问答
-                        <ArrowRightIcon className="ml-1 size-3.5" />
-                      </Button>
                     </div>
                     {!selectorLoading && fallbackAgents.length === 0 && (
                       <div className="mt-3 text-xs text-muted-foreground">
-                        暂无可选智能体，仍可直接进入通用问答
+                        暂无可选智能体
                       </div>
                     )}
                   </div>