: ChatArea TS2322 workaround + SubscriptionPanel component

The ChatArea.tsx toolSteps/subtasks rendering uses helper functions to avoid TypeScript strict mode && chain producing unknown type in JSX children. Add SubscriptionPanel component for subscription status display in SaaS billing section.

desktop/src/components/ChatArea.tsx

@@ -14,7 +14,8 @@ import { Paperclip, SquarePen, ArrowUp, MessageSquare, Download, X, FileText, Im
 import { Button, EmptyState, MessageListSkeleton, LoadingDots } from './ui';
 import { ResizableChatLayout } from './ai/ResizableChatLayout';
 import { ArtifactPanel } from './ai/ArtifactPanel';
-import { ToolCallChain } from './ai/ToolCallChain';
+import { ToolCallChain, type ToolCallStep } from './ai/ToolCallChain';
+import { TaskProgress, type Subtask } from './ai/TaskProgress';
 import { listItemVariants, defaultTransition, fadeInVariants } from '../lib/animations';
 import { FirstConversationPrompt } from './FirstConversationPrompt';
 import { ClassroomPlayer } from './classroom_player';
@@ -30,7 +31,6 @@ import { ReasoningBlock } from './ai/ReasoningBlock';
 import { StreamingText } from './ai/StreamingText';
 import { ChatMode } from './ai/ChatMode';
 import { ModelSelector } from './ai/ModelSelector';
-import { TaskProgress } from './ai/TaskProgress';
 import { SuggestionChips } from './ai/SuggestionChips';
 import { PipelineResultPreview } from './pipeline/PipelineResultPreview';
 import { PresentationContainer } from './presentation/PresentationContainer';
@@ -598,6 +598,20 @@ function MessageBubble({ message, setInput }: { message: Message; setInput: (tex
   const isUser = message.role === 'user';
   const isThinking = message.streaming && !message.content;
 
+  // Extract typed arrays for JSX rendering (avoids TS2322 from && chain producing unknown)
+  const toolCallSteps: ToolCallStep[] | undefined = message.toolSteps;
+  const subtaskList: Subtask[] | undefined = message.subtasks;
+
+  const renderToolSteps = (): React.ReactNode => {
+    if (isUser || !toolCallSteps || toolCallSteps.length === 0) return null;
+    return <ToolCallChain steps={toolCallSteps} isStreaming={!!message.streaming} />;
+  };
+
+  const renderSubtasks = (): React.ReactNode => {
+    if (isUser || !subtaskList || subtaskList.length === 0) return null;
+    return <TaskProgress tasks={subtaskList} className="mb-3" />;
+  };
+
   // Download message as Markdown file
   const handleDownloadMessage = () => {
     if (!message.content) return;
@@ -644,16 +658,9 @@ function MessageBubble({ message, setInput }: { message: Message; setInput: (tex
               />
             )}
             {/* Tool call steps chain (DeerFlow-inspired) */}
-            {!isUser && message.toolSteps != null && message.toolSteps.length > 0 ? (
+            {renderToolSteps()}
-              <ToolCallChain
-                steps={message.toolSteps}
-                isStreaming={message.streaming}
-              />
-            ) : null}
             {/* Subtask tracking (DeerFlow-inspired) */}
-            {!isUser && message.subtasks != null && message.subtasks.length > 0 ? (
+            {renderSubtasks()}
-              <TaskProgress tasks={message.subtasks} className="mb-3" />
-            ) : null}
             {/* Message content with streaming support */}
             <div className={`leading-relaxed ${isUser ? 'text-white whitespace-pre-wrap' : 'text-gray-700 dark:text-gray-200'}`}>
               {message.content

desktop/src/components/SaaS/SubscriptionPanel.tsx

@@ -0,0 +1,173 @@
+/**
+ * SubscriptionPanel — 当前订阅详情面板
+ *
+ * 展示当前计划、试用/到期状态、用量配额和操作入口。
+ */
+
+import { useEffect } from 'react';
+import { useSaaSStore } from '../../store/saasStore';
+import {
+  CheckCircle,
+  Clock,
+  AlertTriangle,
+  Loader2,
+  CreditCard,
+  Crown,
+} from 'lucide-react';
+
+const PLAN_LABELS: Record<string, string> = {
+  free: '免费版',
+  pro: '专业版',
+  team: '团队版',
+};
+
+const PLAN_COLORS: Record<string, string> = {
+  free: '#8c8c8c',
+  pro: '#863bff',
+  team: '#47bfff',
+};
+
+function UsageBar({ label, current, max }: { label: string; current: number; max: number | null }) {
+  const pct = max ? Math.min((current / max) * 100, 100) : 0;
+  const displayMax = max ? max.toLocaleString() : '∞';
+  const barColor = pct >= 90 ? 'bg-red-500' : pct >= 70 ? 'bg-amber-500' : 'bg-emerald-500';
+
+  return (
+    <div className="mb-3">
+      <div className="flex justify-between text-xs text-gray-500 mb-1">
+        <span>{label}</span>
+        <span>{current.toLocaleString()} / {displayMax}</span>
+      </div>
+      <div className="h-2 bg-gray-200 rounded-full overflow-hidden">
+        <div
+          className={`h-full rounded-full transition-all duration-500 ${barColor}`}
+          style={{ width: `${Math.max(pct, 1)}%` }}
+        />
+      </div>
+    </div>
+  );
+}
+
+export function SubscriptionPanel() {
+  const subscription = useSaaSStore((s) => s.subscription);
+  const billingLoading = useSaaSStore((s) => s.billingLoading);
+  const fetchBillingOverview = useSaaSStore((s) => s.fetchBillingOverview);
+
+  useEffect(() => {
+    fetchBillingOverview().catch(() => {});
+  }, [fetchBillingOverview]);
+
+  if (billingLoading && !subscription) {
+    return (
+      <div className="flex justify-center py-12">
+        <Loader2 className="w-6 h-6 animate-spin text-emerald-600" />
+      </div>
+    );
+  }
+
+  const plan = subscription?.plan;
+  const sub = subscription?.subscription;
+  const usage = subscription?.usage;
+  const planName = plan?.name || 'free';
+  const color = PLAN_COLORS[planName] || '#666';
+  const label = PLAN_LABELS[planName] || planName;
+
+  // Trial / expiry status
+  const isTrialing = sub?.status === 'trialing';
+  const isActive = sub?.status === 'active';
+  const trialEnd = sub?.trial_end ? new Date(sub.trial_end) : null;
+  const periodEnd = sub?.current_period_end ? new Date(sub.current_period_end) : null;
+
+  const now = Date.now();
+  const daysLeft = trialEnd
+    ? Math.max(0, Math.ceil((trialEnd.getTime() - now) / (1000 * 60 * 60 * 24)))
+    : periodEnd
+    ? Math.max(0, Math.ceil((periodEnd.getTime() - now) / (1000 * 60 * 60 * 24)))
+    : null;
+
+  const showExpiryWarning = daysLeft !== null && daysLeft <= 3;
+
+  return (
+    <div className="space-y-5">
+      {/* Plan badge */}
+      <div className="bg-white rounded-xl border border-gray-200 p-5 shadow-sm">
+        <div className="flex items-center justify-between mb-4">
+          <div className="flex items-center gap-3">
+            <div
+              className="w-10 h-10 rounded-lg flex items-center justify-center text-white"
+              style={{ background: color }}
+            >
+              <Crown className="w-5 h-5" />
+            </div>
+            <div>
+              <h2 className="text-lg font-bold text-gray-900">{label}</h2>
+              {isTrialing && (
+                <span className="inline-flex items-center gap-1 text-xs text-amber-600 bg-amber-50 px-2 py-0.5 rounded-full">
+                  <Clock className="w-3 h-3" />
+                  试用中
+                </span>
+              )}
+              {isActive && (
+                <span className="inline-flex items-center gap-1 text-xs text-emerald-600 bg-emerald-50 px-2 py-0.5 rounded-full">
+                  <CheckCircle className="w-3 h-3" />
+                  已激活
+                </span>
+              )}
+            </div>
+          </div>
+          <CreditCard className="w-5 h-5 text-gray-400" />
+        </div>
+
+        {/* Expiry / trial warning */}
+        {showExpiryWarning && (
+          <div className={`flex items-center gap-2 p-3 rounded-lg text-sm mb-3 ${
+            isTrialing
+              ? 'bg-amber-50 text-amber-700 border border-amber-200'
+              : 'bg-red-50 text-red-700 border border-red-200'
+          }`}>
+            <AlertTriangle className="w-4 h-4 flex-shrink-0" />
+            <span>
+              {isTrialing
+                ? `试用还剩 ${daysLeft} 天，请尽快升级以保留 Pro 功能`
+                : `订阅将在 ${daysLeft} 天后到期`}
+            </span>
+          </div>
+        )}
+
+        {daysLeft !== null && !showExpiryWarning && (
+          <p className="text-xs text-gray-400">
+            {isTrialing ? `试用剩余 ${daysLeft} 天` : `订阅到期: ${periodEnd?.toLocaleDateString()}`}
+          </p>
+        )}
+      </div>
+
+      {/* Usage */}
+      {usage && (
+        <div className="bg-white rounded-xl border border-gray-200 p-5 shadow-sm">
+          <h3 className="text-sm font-semibold text-gray-900 mb-4">用量配额</h3>
+          <UsageBar label="中转请求" current={usage.relay_requests} max={usage.max_relay_requests} />
+          <UsageBar label="Hand 执行" current={usage.hand_executions} max={usage.max_hand_executions} />
+          <UsageBar label="Pipeline 运行" current={usage.pipeline_runs} max={usage.max_pipeline_runs} />
+          {sub && (
+            <p className="mt-2 text-xs text-gray-400">
+              周期: {new Date(sub.current_period_start).toLocaleDateString()} — {new Date(sub.current_period_end).toLocaleDateString()}
+            </p>
+          )}
+        </div>
+      )}
+
+      {/* Free plan upgrade prompt */}
+      {planName === 'free' && (
+        <div className="bg-gradient-to-r from-purple-50 to-blue-50 rounded-xl border border-purple-200 p-5">
+          <h3 className="text-sm font-semibold text-gray-900 mb-2">升级到专业版</h3>
+          <p className="text-xs text-gray-600 mb-3">
+            解锁全部 9 个 Hands、无限 Pipeline 和完整记忆系统
+          </p>
+          <p className="text-xs text-purple-600">
+            请前往「订阅与计费」页面选择计划并完成支付
+          </p>
+        </div>
+      )}
+    </div>
+  );
+}