feat(assets): add DeepSeek assistant with streaming results and voice input

src/modules/assets/AssetsModule.tsx

@@ -1,10 +1,10 @@
 import "./library/asset-ui.css";
 import "./library/inventory-matrix.css";
-import { useCallback, useEffect, useRef, useState } from "react";
+import { lazy, Suspense, useCallback, useEffect, useRef, useState } from "react";
 import { Button } from "@/components/ui/button";
 import { Tabs, TabsList, TabsTrigger, TabsContent } from "@/components/ui/tabs";
 import { Skeleton } from "@/components/ui/skeleton";
-import { ArrowUpRight, Moon, RefreshCw, Sun, Truck } from "lucide-react";
+import { ArrowUpRight, Moon, RefreshCw, Sparkles, Sun, Truck } from "lucide-react";
 import {
   Picker,
   Failure,
@@ -43,6 +43,7 @@ import {
   CustomerView,
 } from "./library/BusinessViews";
 import { VehicleDetails } from "./library/VehicleDetails";
+const AssetAssistant = lazy(() => import('./assistant/AssetAssistant'));
 
 interface Data {
   summary: SummaryData;
@@ -53,6 +54,8 @@ interface Data {
   inventory: RegionalInventoryStats[];
 }
 export default function AssetsModule() {
+  const [assistantOpen, setAssistantOpen] = useState(false);
+  const assistantTrigger = useRef<HTMLButtonElement>(null);
   const [appearance, setAppearance] = useState<"light" | "dark">(() => {
     const saved = window.localStorage.getItem("asset-appearance");
     return saved === "light" || saved === "dark"
@@ -202,6 +205,7 @@ export default function AssetsModule() {
           />
         </div>
         <div className="flex items-center gap-2 self-end">
+          <Button ref={assistantTrigger} variant="outline" className="min-h-10 gap-2" onClick={() => setAssistantOpen(true)}><Sparkles className="size-4" aria-hidden="true" />AI 问数</Button>
           <span className="mr-2 hidden text-xs text-[var(--label-secondary)] sm:block">
             {updated
               ? `更新于 ${updated.slice(11, 16)} · 台账截至 17:00`
@@ -306,6 +310,7 @@ export default function AssetsModule() {
         subject={subject}
         close={() => setSelection(null)}
       />
+      {assistantOpen && <Suspense fallback={<div role="status" className="fixed bottom-20 right-6 z-50 rounded-xl bg-white p-4 text-slate-900 shadow-lg">正在打开 AI 问数…</div>}><AssetAssistant key={subject || 'all'} subject={subject} appearance={appearance} close={() => { setAssistantOpen(false); requestAnimationFrame(() => assistantTrigger.current?.focus()); }} /></Suspense>}
     </div>
   );
 }