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/server/routes/feedback/index.ts

@@ -0,0 +1,77 @@
+import { Hono } from 'hono';
+import type { ResultSetHeader, RowDataPacket } from 'mysql2';
+import pool from '../../db.js';
+import type { AuthUser } from '../../auth/types.js';
+
+const app = new Hono();
+
+const CREATE_TABLE_SQL = `
+CREATE TABLE IF NOT EXISTS bi_user_feedback (
+  id BIGINT AUTO_INCREMENT PRIMARY KEY,
+  type ENUM('dimension','bug','ux','other') NOT NULL DEFAULT 'other',
+  module VARCHAR(64) NULL,
+  content TEXT NOT NULL,
+  contact VARCHAR(200) NULL,
+  user_id VARCHAR(64) NULL,
+  user_name VARCHAR(128) NULL,
+  user_agent VARCHAR(512) NULL,
+  status ENUM('open','in_progress','done','rejected') NOT NULL DEFAULT 'open',
+  created_at DATETIME NOT NULL,
+  KEY idx_created_at (created_at),
+  KEY idx_type (type),
+  KEY idx_status (status)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
+`;
+
+let ensured = false;
+async function ensureTable(): Promise<void> {
+  if (ensured) return;
+  await pool.query(CREATE_TABLE_SQL);
+  ensured = true;
+}
+
+const VALID_TYPES = new Set(['dimension', 'bug', 'ux', 'other']);
+
+app.post('/submit', async (c) => {
+  await ensureTable();
+  const body = await c.req.json().catch(() => ({})) as {
+    type?: string; module?: string | null; content?: string;
+    contact?: string | null; userAgent?: string;
+  };
+  const type = (body.type || '').trim();
+  const content = (body.content || '').trim();
+  if (!VALID_TYPES.has(type)) {
+    return c.json({ ok: false, message: '类型不合法' }, 400);
+  }
+  if (!content || content.length > 2000) {
+    return c.json({ ok: false, message: '内容长度需在 1-2000 字之间' }, 400);
+  }
+
+  const user = (c as { get?: (k: string) => unknown }).get?.('user') as AuthUser | undefined;
+  const moduleVal = (body.module || '').slice(0, 64) || null;
+  const contact = (body.contact || '').slice(0, 200) || null;
+  const userAgent = (body.userAgent || '').slice(0, 512) || null;
+
+  const [r] = await pool.query<ResultSetHeader>(
+    `INSERT INTO bi_user_feedback (type, module, content, contact, user_id, user_name, user_agent, created_at)
+     VALUES (?, ?, ?, ?, ?, ?, ?, NOW())`,
+    [type, moduleVal, content, contact, user?.userId || null, user?.userName || null, userAgent],
+  );
+  return c.json({ ok: true, id: r.insertId });
+});
+
+// GET /api/feedback/list — 简易列表（按时间倒序，最多 200 条）
+app.get('/list', async (c) => {
+  await ensureTable();
+  const limit = Math.min(200, Math.max(1, Number(c.req.query('limit')) || 50));
+  const [rows] = await pool.query<RowDataPacket[]>(
+    `SELECT id, type, module, content, contact, user_name, status, created_at
+       FROM bi_user_feedback
+       ORDER BY created_at DESC
+       LIMIT ?`,
+    [limit],
+  );
+  return c.json({ items: rows });
+});
+
+export default app;