ui(assets): move AI assistant to the bottom feedback position

src/components/Shell.tsx

@@ -165,7 +165,7 @@ export function Shell({ modules }: { modules: ModuleConfig[] }) {
         <Suspense fallback={<div className="p-3 md:p-6"><LoadingState label="正在加载业务模块" /></div>}>
           {ActiveComponent && <ActiveComponent />}
         </Suspense>
-        <FeedbackFab module={activeModule} />
+        {activeModule !== 'assets' && <FeedbackFab module={activeModule} />}
       </main>
 
       {/* 移动端底部导航 (md 以下) */}

src/modules/assets/AssetsModule.tsx

@@ -1,6 +1,7 @@
 import React, { lazy, Suspense, useState, useEffect, useCallback, useMemo, useRef } from 'react';
 import {
   Truck,
+  Sparkles,
   ChevronDown,
   ChevronRight,
   Loader2,
@@ -483,8 +484,6 @@ export default function AssetsModule() {
   return (
     <div className="min-h-screen bg-[var(--app-bg)] text-gray-800 font-sans p-3 md:p-6 relative">
       <AssetsHeader
-        assistantTrigger={assistantTrigger}
-        onOpenAssistant={() => setAssistantOpen(true)}
         activeTab={activeTab}
         setActiveTab={setActiveTab}
         theme={theme}
@@ -1708,6 +1707,18 @@ export default function AssetsModule() {
 
       </div>
       <RotatingFooterHint className="pb-4" />
+      <button
+        ref={assistantTrigger}
+        type="button"
+        onClick={() => setAssistantOpen(true)}
+        aria-label="打开 AI 问数"
+        aria-haspopup="dialog"
+        aria-expanded={assistantOpen}
+        className="fixed bottom-[calc(5rem+env(safe-area-inset-bottom))] right-4 z-[60] inline-flex min-h-12 items-center gap-2 rounded-full bg-gradient-to-br from-blue-600 to-cyan-500 px-4 text-sm font-semibold text-white shadow-lg shadow-blue-200 transition hover:from-blue-700 hover:to-cyan-600 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-500 focus-visible:ring-offset-2 md:bottom-6 md:right-6"
+      >
+        <Sparkles size={20} aria-hidden="true" />
+        AI 问数
+      </button>
       {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={selectedSubject || 'all'} subject={selectedSubject} appearance="light" close={() => { setAssistantOpen(false); requestAnimationFrame(() => assistantTrigger.current?.focus()); }} /></Suspense>}
     </div>
   );

src/modules/assets/components/AssetsHeader.tsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import { ChevronDown, Filter, Loader2, Search, Sparkles } from 'lucide-react';
+import { ChevronDown, Filter, Loader2, Search } from 'lucide-react';
 import { motion } from 'motion/react';
 import type { SubjectOption } from '../api';
 
@@ -7,8 +7,6 @@ export type AssetsTab = 'overview' | 'department' | 'region' | 'customer';
 export type AssetsTheme = 'soft' | 'minimal' | 'vibrant';
 
 interface AssetsHeaderProps {
-  onOpenAssistant: () => void;
-  assistantTrigger: React.RefObject<HTMLButtonElement | null>;
   activeTab: AssetsTab;
   setActiveTab: React.Dispatch<React.SetStateAction<AssetsTab>>;
   theme: AssetsTheme;
@@ -33,8 +31,6 @@ const TABS = [
 ];
 
 export function AssetsHeader({
-  onOpenAssistant,
-  assistantTrigger,
   activeTab,
   setActiveTab,
   theme,
@@ -81,11 +77,6 @@ export function AssetsHeader({
             </div>
           </div>
         </div>
-        <div className="flex justify-end px-4 pb-1">
-          <button ref={assistantTrigger} type="button" onClick={onOpenAssistant} className="inline-flex min-h-8 items-center gap-1.5 rounded-lg border border-blue-100 bg-blue-50 px-3 text-xs font-semibold text-blue-600 hover:bg-blue-100">
-            <Sparkles size={14} aria-hidden="true" />AI 问数
-          </button>
-        </div>
         {/* 归属公司作用域筛选 (Scope Chip) */}
         <div className="flex items-center justify-center px-4 pt-1">
           <div className="relative" ref={subjectDropdownRef}>