feat(agents): 智能体问答页落地态展示常用问题入口并默认展开简介栏

- 落地页 Hero 以"Hi，我是{名称}"问候，将管理员配置的常用问题渲染为可点击的引导气泡，点击即发起对话
- 右侧智能体简介栏改为默认展开，作为主要"专家信息"卡片，仍可手动收起

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend-web/src/components/workspace/agent-info-sidebar.tsx

@@ -43,7 +43,10 @@ export function AgentInfoSidebar({
   onAskQuestion: (text: string) => void;
   disabled?: boolean;
 }) {
-  const [collapsed, setCollapsed] = useState(true);
+  // Expanded by default: the profile card is meant to be the agent's primary
+  // "expert info" panel, not a hidden drawer. Users can still collapse it on
+  // narrow screens via the header toggle.
+  const [collapsed, setCollapsed] = useState(false);
   const [detailSkillName, setDetailSkillName] = useState<string | null>(null);
   const { skills } = useSkills();
   const updateAgent = useUpdateAgent();

frontend-web/src/components/workspace/agent-welcome.tsx

@@ -6,33 +6,70 @@ import { type Agent } from "@/core/agents";
 import { desensitize } from "@/lib/desensitize";
 import { cn } from "@/lib/utils";
 
+/**
+ * Landing (home) hero shown above the input box before the first message of an
+ * agent conversation. Mirrors the qclaw landing screen: centered avatar, a
+ * "Hi，我是{name}" greeting, the agent's one-line description as a slogan, and
+ * the agent's admin-configured common questions surfaced as clickable starter
+ * pills. Clicking a pill sends it as the opening message via `onAskQuestion`.
+ */
 export function AgentWelcome({
   className,
   agent,
   agentName,
+  onAskQuestion,
+  disabled,
 }: {
   className?: string;
   agent: Agent | null | undefined;
   agentName: string;
+  onAskQuestion?: (text: string) => void;
+  disabled?: boolean;
 }) {
   const displayName = desensitize(agent?.name ?? agentName);
   const description = agent?.description
     ? desensitize(agent.description)
     : undefined;
+  const questions = (agent?.common_questions ?? []).filter(
+    (q) => q.trim().length > 0,
+  );
 
   return (
     <div
       className={cn(
-        "mx-auto flex w-full flex-col items-center justify-center gap-2 px-8 py-4 text-center",
+        "mx-auto flex w-full max-w-2xl flex-col items-center justify-center gap-3 px-6 text-center",
         className,
       )}
     >
-      <div className="bg-primary/10 flex h-12 w-12 items-center justify-center rounded-full">
+      <div className="bg-primary/10 ring-primary/15 flex h-16 w-16 items-center justify-center rounded-2xl ring-1">
-        <BotIcon className="text-primary h-6 w-6" />
+        <BotIcon className="text-primary h-8 w-8" />
+      </div>
+      <div className="text-2xl font-bold tracking-tight">
+        Hi，我是{displayName}
       </div>
-      <div className="text-2xl font-bold">{displayName}</div>
       {description && (
-        <p className="text-muted-foreground max-w-sm text-sm">{description}</p>
+        <p className="text-muted-foreground max-w-md text-sm leading-relaxed">
+          {description}
+        </p>
+      )}
+      {onAskQuestion && questions.length > 0 && (
+        <div className="mt-1 flex flex-wrap items-center justify-center gap-2">
+          {questions.slice(0, 6).map((question, index) => (
+            <button
+              key={index}
+              type="button"
+              disabled={disabled}
+              onClick={() => onAskQuestion(question)}
+              title={question}
+              className={cn(
+                "border-border/70 bg-card/60 hover:bg-accent hover:border-border max-w-[280px] truncate rounded-full border px-4 py-2 text-sm transition-colors",
+                "disabled:cursor-not-allowed disabled:opacity-50",
+              )}
+            >
+              {desensitize(question)}
+            </button>
+          ))}
+        </div>
       )}
     </div>
   );

frontend-web/src/pages/AgentChatPage.tsx

@@ -268,7 +268,16 @@ export default function AgentChatPage() {
                     context={settings.context}
                     extraHeader={
                       isLandingState && (
-                        <AgentWelcome agent={agent} agentName={agentDisplayName} />
+                        <AgentWelcome
+                          agent={agent}
+                          agentName={agentDisplayName}
+                          onAskQuestion={(text) =>
+                            handleSubmit({ text, files: [] })
+                          }
+                          disabled={
+                            env.NEXT_PUBLIC_STATIC_WEBSITE_ONLY === "true"
+                          }
+                        />
                       )
                     }
                     disabled={env.NEXT_PUBLIC_STATIC_WEBSITE_ONLY === "true"}