feat: 全局反馈系统 + 各模块底部统一动态提示

- 新增 components/RotatingFooterHint：统一文案+蓝色脉冲，4 秒轮换
- 新增 components/FeedbackFab：右下角悬浮按钮（渐变 + 心形信封 + 黄色脉冲点），
  点击打开 4 步引导式弹窗
    Step 1 选类型（💡新维度 / 🐛bug / 🎨界面 / 📝其他）
    Step 2 描述需求 + 选当前板块（chip）
    Step 3 留联系方式（可选）+ 提交概览
    Step 4 ❤️ 成功页（弹簧 √ 动画）
  顶部 spring 进度条，底部上一步/下一步，下拉手柄，背景点击或 X 关闭
- 后端 routes/feedback：bi_user_feedback 表（自动建表，含 status 字段）
  POST /api/feedback/submit + GET /api/feedback/list
- Shell 全局挂载 FeedbackFab，自动从 hash 检测当前模块
- 各模块底部追加 RotatingFooterHint：
  AssetsModule / MileageModule / SchedulingModule / EleImportPage
  HydrogenOverview / HydrogenDaily / ElectricOverview / ElectricDaily
  （HydrogenOverview 旧的内嵌实现已替换为共享组件）

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/modules/energy/ElectricDaily.tsx

@@ -4,6 +4,7 @@ import { motion, AnimatePresence } from 'motion/react';
 import TrendBadge from './TrendBadge';
 import { fetchElectricMonthly } from './api';
 import type { CustomerType, ElectricMonthGroup } from './types';
+import RotatingFooterHint from '../../components/RotatingFooterHint';
 
 export default function ElectricDaily() {
   const [customer, setCustomer] = useState<CustomerType>('lingniu');
@@ -114,6 +115,7 @@ export default function ElectricDaily() {
           );
         })}
       </div>
+      <RotatingFooterHint />
     </div>
   );
 }

src/modules/energy/ElectricOverview.tsx

@@ -2,6 +2,7 @@ import { useEffect, useState } from 'react';
 import { Wallet, CalendarClock } from 'lucide-react';
 import { BarChart, Bar, XAxis, YAxis, ResponsiveContainer, Cell, Tooltip } from 'recharts';
 import { fetchElectricOverview, type ElectricOverviewResponse } from './api';
+import RotatingFooterHint from '../../components/RotatingFooterHint';
 
 function fmtYuan(yuan: number) {
   return `¥${yuan.toLocaleString('zh-CN', { maximumFractionDigits: 2 })}`;
@@ -95,6 +96,7 @@ export default function ElectricOverview() {
           </BarChart>
         </ResponsiveContainer>
       </div>
+      <RotatingFooterHint />
     </div>
   );
 }

src/modules/energy/HydrogenDaily.tsx

@@ -5,6 +5,7 @@ import { BarChart, Bar, XAxis, YAxis, ResponsiveContainer, Cell, Tooltip } from
 import TrendBadge from './TrendBadge';
 import { fetchHydrogenDaily } from './api';
 import type { CustomerType, DateQuickPick, HydrogenDailyRow } from './types';
+import RotatingFooterHint from '../../components/RotatingFooterHint';
 
 const QUICK_PICK_OPTIONS: Array<{ id: DateQuickPick; label: string }> = [
   { id: 'today',       label: '当天'     },
@@ -214,6 +215,7 @@ export default function HydrogenDaily() {
         })}
       </div>
       )}
+      <RotatingFooterHint />
     </div>
   );
 }

src/modules/energy/HydrogenOverview.tsx

@@ -1,6 +1,7 @@
 import { useEffect, useState } from 'react';
 import { BarChart, Bar, XAxis, YAxis, ResponsiveContainer, Cell, PieChart, Pie, Tooltip, LabelList } from 'recharts';
 import { fetchHydrogenOverview, type HydrogenOverviewResponse } from './api';
+import RotatingFooterHint from '../../components/RotatingFooterHint';
 
 interface YAxisTickProps {
   x?: number;
@@ -29,15 +30,6 @@ const REGION_COLORS = [
   '#94a3b8',
 ];
 
-// 幽默动态提示词，每 4 秒轮换一条
-const FOOTER_HINTS = [
-  '更多统计维度接入中，欢迎您的建议 ~',
-  '下一个图表，可能就是您建议的那个',
-  '数据科学家正在深夜挖掘新维度…',
-  '想看哪个角度的数据？告诉我们一下嘛',
-  '维度灵感正在路上，钉一下产品同学也行',
-  '数字背后还有故事，等下一次上线揭晓',
-];
 
 export default function HydrogenOverview() {
   const [data, setData] = useState<HydrogenOverviewResponse | null>(null);
@@ -153,32 +145,6 @@ export default function HydrogenOverview() {
   );
 }
 
-function RotatingFooterHint() {
-  const [idx, setIdx] = useState(0);
-  useEffect(() => {
-    const t = setInterval(() => setIdx(i => (i + 1) % FOOTER_HINTS.length), 4000);
-    return () => clearInterval(t);
-  }, []);
-  return (
-    <div className="mt-1 flex items-center justify-center gap-1.5 text-[11px] text-slate-400 font-bold">
-      <span className="inline-block w-1.5 h-1.5 rounded-full bg-blue-400 animate-pulse" />
-      <span
-        key={idx}
-        className="transition-opacity duration-300"
-        style={{ animation: 'hintFade 0.5s ease' }}
-      >
-        {FOOTER_HINTS[idx]}
-      </span>
-      <style>{`
-        @keyframes hintFade {
-          from { opacity: 0; transform: translateY(2px); }
-          to   { opacity: 1; transform: translateY(0); }
-        }
-      `}</style>
-    </div>
-  );
-}
-
 function HydrogenOverviewSkeleton() {
   return (
     <div className="flex flex-col gap-3 animate-pulse">