fix(scheduling): fix vehicle type classification and algorithm candidate matching

- classifyVehicleType now parses dic_type.dic_name (e.g. "4.5吨冷链车") instead of raw model code - Remove overly strict completionRate >= 0.8 filter for hopeless candidates - Use vehicle's yearTarget as fallback when inventory has no assessment target - Filter out suggestions with no candidates (not actionable) - estimatedGain counts rescue_hopeless suggestions as potential gains Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-16 20:31:44 +08:00
parent db5ca2e686
commit 253cc2f2c0
13 changed files with 2110 additions and 28 deletions
--- a/docs/superpowers/plans/2026-04-02-mileage-backend-refactor.md
+++ b/docs/superpowers/plans/2026-04-02-mileage-backend-refactor.md
@@ -0,0 +1,926 @@
+# Mileage Backend Refactor Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Refactor `src/server/routes/mileage.ts` (569 lines) into well-typed, modular files with clear responsibilities, eliminating duplicate logic and `as any` casts.
+
+**Architecture:** Split the monolithic route file into: shared types, a reusable vehicle-info query module, a monitoring cache module, and focused route handlers. The API contract (request/response shapes) stays identical — this is a pure internal refactor with zero frontend changes.
+
+**Tech Stack:** Hono, mysql2/promise, TypeScript strict types
+
+---
+
+## File Structure
+
+| File | Responsibility |
+|------|---------------|
+| `src/server/routes/mileage/types.ts` | All interfaces for mileage domain (cache, vehicles, filters, API responses) |
+| `src/server/routes/mileage/vehicle-info.ts` | Shared SQL + helper to build plate→info Map from `lingniu_prod` |
+| `src/server/routes/mileage/cache.ts` | Monitoring cache: refresh logic, data merging, filter precomputation, target mapping |
+| `src/server/routes/mileage/monitoring.ts` | `GET /monitoring` route handler |
+| `src/server/routes/mileage/targets.ts` | `GET /targets`, `GET /target/:id/vehicles` route handlers |
+| `src/server/routes/mileage/trend.ts` | `GET /trend` route handler |
+| `src/server/routes/mileage/index.ts` | Hono app assembly: imports routes, starts cache timer, exports app |
+
+After refactor, delete: `src/server/routes/mileage.ts` (the old monolith).
+
+## Constraints
+
+- **Zero API changes** — all request params and response JSON shapes must remain identical
+- **Zero frontend changes** — `src/modules/mileage/api.ts` and `types.ts` stay untouched
+- **Preserve all existing behavior** including cache refresh interval, date queries, filter logic
+
+---
+
+### Task 1: Create shared types
+
+**Files:**
+- Create: `src/server/routes/mileage/types.ts`
+
+- [ ] **Step 1: Create the types file**
+
+```typescript
+// src/server/routes/mileage/types.ts
+
+/** 缓存中的单辆车数据 */
+export interface CachedVehicle {
+  plate: string;
+  vin: string;
+  dailyKm: number;
+  totalKm: number | null;
+  source: string;
+  isOnline: boolean;
+  isDataSynced: boolean;
+  customer: string | null;
+  department: string | null;
+  manager: string | null;
+  rentStatus: string | null;
+  entity: string | null;
+  project: string | null;
+  yesterdayKm: number;
+}
+
+/** 车牌前缀统计 */
+export interface PlatePrefix {
+  prefix: string;
+  count: number;
+}
+
+/** 筛选选项（前端下拉） */
+export interface MonitoringFilters {
+  departments: string[];
+  customers: string[];
+  plates: string[];
+  projects: string[];
+  entities: string[];
+  rentStatuses: string[];
+  platePrefixes: PlatePrefix[];
+  targetNames: string[];
+}
+
+/** 监控缓存 */
+export interface MonitoringCache {
+  vehicles: CachedVehicle[];
+  stats: { totalToday: number; totalAll: number; vehicleCount: number };
+  filters: MonitoringFilters;
+  targetPlatesMap: Map<string, Set<string>>;
+  updatedAt: string;
+}
+
+/** /monitoring 响应中的统计 */
+export interface MonitoringStats {
+  totalToday: number;
+  totalAll: number;
+  vehicleCount: number;
+  yesterdayTotal: number;
+}
+
+/** /monitoring 完整响应 */
+export interface MonitoringResponse {
+  vehicles: CachedVehicle[];
+  stats: MonitoringStats;
+  filters: MonitoringFilters;
+  total: number;
+  page: number;
+  totalPages: number;
+  updatedAt: string;
+}
+
+/** 车辆关联信息（从 lingniu_prod 查出的原始行） */
+export interface VehicleInfoRow {
+  plate: string;
+  customer: string | null;
+  department: string | null;
+  manager: string | null;
+  rent_status: string | null;
+  entity: string | null;
+  project: string | null;
+}
+```
+
+- [ ] **Step 2: Verify TypeScript compiles**
+
+Run: `npx tsc --noEmit`
+Expected: no errors (new file has no imports/consumers yet)
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/server/routes/mileage/types.ts
+git commit -m "refactor: extract mileage shared types"
+```
+
+---
+
+### Task 2: Extract vehicle-info query module
+
+**Files:**
+- Create: `src/server/routes/mileage/vehicle-info.ts`
+
+- [ ] **Step 1: Create the vehicle-info module**
+
+This extracts the `VEHICLE_INFO_SQL` constant and a helper function to build the info Map. Both the cache builder and the `/target/:id/vehicles` route reuse this.
+
+```typescript
+// src/server/routes/mileage/vehicle-info.ts
+import pool from '../../db.js';
+import type { VehicleInfoRow } from './types.js';
+
+/** 车辆关联信息 SQL（客户名、部门、经理、租赁状态、主体、项目） */
+export const VEHICLE_INFO_SQL = `SELECT
+    truck.plate_number AS plate,
+    cus.customer_name AS customer,
+    dep.dep_name AS department,
+    u.user_name AS manager,
+    dic_status.dic_name AS rent_status,
+    org_truck.org_name AS entity,
+    c.project_name AS project
+FROM tab_truck truck
+LEFT JOIN tab_truck_status_info si ON si.truck_id = truck.id AND si.is_deleted = 0
+LEFT JOIN tab_contract c ON c.id = si.contract_id AND c.is_deleted = 0
+LEFT JOIN tab_customer cus ON cus.id = c.customer_id AND cus.is_deleted = 0
+LEFT JOIN tab_user u ON u.id = c.bd AND u.is_deleted = 0
+LEFT JOIN tab_department dep ON dep.id = u.dep_id AND dep.is_deleted = 0
+LEFT JOIN tab_dic dic_status ON dic_status.parent_code = 'dic_truck_rent_status'
+      AND dic_status.dic_code = truck.truck_rent_status AND dic_status.is_deleted = 0
+LEFT JOIN tab_org org_truck ON org_truck.id = truck.org_id AND org_truck.is_deleted = 0
+WHERE truck.is_deleted = 0 AND truck.is_operation = 1`;
+
+/** 查询所有车辆关联信息，返回 plate→info 的 Map */
+export async function fetchVehicleInfoMap(): Promise<Map<string, VehicleInfoRow>> {
+  const [rows] = await pool.execute(VEHICLE_INFO_SQL) as [VehicleInfoRow[], unknown];
+  const map = new Map<string, VehicleInfoRow>();
+  for (const row of rows) {
+    map.set(row.plate, row);
+  }
+  return map;
+}
+
+/** 查询指定车牌的关联信息 */
+export async function fetchVehicleInfoByPlates(plates: string[]): Promise<Map<string, VehicleInfoRow>> {
+  if (plates.length === 0) return new Map();
+  const [rows] = await pool.execute(
+    `${VEHICLE_INFO_SQL} AND truck.plate_number IN (${plates.map(() => '?').join(',')})`,
+    plates
+  ) as [VehicleInfoRow[], unknown];
+  const map = new Map<string, VehicleInfoRow>();
+  for (const row of rows) {
+    map.set(row.plate, row);
+  }
+  return map;
+}
+```
+
+- [ ] **Step 2: Verify TypeScript compiles**
+
+Run: `npx tsc --noEmit`
+Expected: no errors
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/server/routes/mileage/vehicle-info.ts
+git commit -m "refactor: extract vehicle-info query module"
+```
+
+---
+
+### Task 3: Extract monitoring cache module
+
+**Files:**
+- Create: `src/server/routes/mileage/cache.ts`
+
+- [ ] **Step 1: Create the cache module**
+
+This contains the cache singleton, refresh logic, and the `queryDateMileage` function. Both used to live in the monolith.
+
+```typescript
+// src/server/routes/mileage/cache.ts
+import pool from '../../db.js';
+import mileagePool from '../../mileage-db.js';
+import { fetchVehicleInfoMap } from './vehicle-info.js';
+import type { CachedVehicle, MonitoringCache, MonitoringFilters, PlatePrefix } from './types.js';
+
+let monitoringCache: MonitoringCache | null = null;
+
+export function getCache(): MonitoringCache | null {
+  return monitoringCache;
+}
+
+/** 部门排序顺序 */
+const DEPT_ORDER = ['一', '二', '三', '四', '五', '六', '七', '八', '九', '十'];
+
+function sortDepartments(departments: string[]): string[] {
+  return departments.sort((a, b) => {
+    const ai = DEPT_ORDER.findIndex(d => a.includes(d));
+    const bi = DEPT_ORDER.findIndex(d => b.includes(d));
+    return (ai === -1 ? 99 : ai) - (bi === -1 ? 99 : bi);
+  });
+}
+
+/** 从车辆列表计算筛选选项 */
+function buildFilters(vehicles: CachedVehicle[], targetNames: string[]): MonitoringFilters {
+  const departments = sortDepartments(
+    Array.from(new Set(vehicles.map(v => v.department).filter((d): d is string => d !== null)))
+  );
+  const customers = Array.from(new Set(vehicles.map(v => v.customer).filter((c): c is string => c !== null)));
+  const plates = vehicles.map(v => v.plate);
+  const projects = Array.from(new Set(vehicles.map(v => v.project).filter((p): p is string => p !== null)));
+  const entities = Array.from(new Set(vehicles.map(v => v.entity).filter((e): e is string => e !== null)));
+  const rentStatuses = Array.from(new Set(vehicles.map(v => v.rentStatus).filter((r): r is string => r !== null)));
+
+  const prefixCount = new Map<string, number>();
+  for (const v of vehicles) {
+    const p = v.plate.charAt(0);
+    prefixCount.set(p, (prefixCount.get(p) || 0) + 1);
+  }
+  const platePrefixes: PlatePrefix[] = Array.from(prefixCount.entries())
+    .map(([prefix, count]) => ({ prefix, count }))
+    .sort((a, b) => b.count - a.count);
+
+  return { departments, customers, plates, projects, entities, rentStatuses, platePrefixes, targetNames };
+}
+
+/** 将里程原始行 + 车辆信息合并为 CachedVehicle 列表 */
+function mergeVehicles(
+  mileageRows: { plate: string; vin: string; daily_km: string; total_km: string | null; source: string }[],
+  infoMap: Map<string, { customer: string | null; department: string | null; manager: string | null; rent_status: string | null; entity: string | null; project: string | null }>,
+  yesterdayMap: Map<string, number>,
+): CachedVehicle[] {
+  // 去重：同一 plate 取 daily_km 最大的
+  const mileageMap = new Map<string, typeof mileageRows[0]>();
+  for (const row of mileageRows) {
+    const existing = mileageMap.get(row.plate);
+    if (!existing || Number(row.daily_km) > Number(existing.daily_km)) {
+      mileageMap.set(row.plate, row);
+    }
+  }
+
+  return Array.from(mileageMap.values()).map(m => {
+    const info = infoMap.get(m.plate);
+    const dailyKm = Number(m.daily_km) || 0;
+    const source = m.source || 'NONE';
+    return {
+      plate: m.plate,
+      vin: m.vin,
+      dailyKm,
+      totalKm: m.total_km !== null ? Number(m.total_km) : null,
+      source,
+      isOnline: source !== 'NONE' && dailyKm > 0,
+      isDataSynced: source !== 'NONE',
+      customer: info?.customer || null,
+      department: info?.department || null,
+      manager: info?.manager || null,
+      rentStatus: info?.rent_status || null,
+      entity: info?.entity || null,
+      project: info?.project || null,
+      yesterdayKm: yesterdayMap.get(m.plate) || 0,
+    };
+  });
+}
+
+/** 刷新监控缓存（从两个数据库并行查询） */
+export async function refreshMonitoringCache(): Promise<void> {
+  try {
+    console.log('[mileage] refreshing monitoring cache...');
+    const start = Date.now();
+
+    const [mileageRows, yesterdayMap, infoMap, targetRows] = await Promise.all([
+      // 最新日期的里程数据
+      (async () => {
+        const [dateRows] = await mileagePool.execute(
+          'SELECT MAX(stat_date) as latest FROM v_vehicle_daily_stats'
+        ) as [{ latest: string | null }[], unknown];
+        const latestDate = dateRows[0]?.latest;
+        if (!latestDate) return [];
+        const [rows] = await mileagePool.execute(
+          'SELECT plate, vin, daily_km, total_km, source FROM v_vehicle_daily_stats WHERE stat_date = ?',
+          [latestDate]
+        ) as [any[], unknown];
+        return rows;
+      })(),
+      // 昨日里程（用于环比）
+      (async () => {
+        const [rows] = await mileagePool.execute(
+          `SELECT plate, daily_km FROM v_vehicle_daily_stats
+           WHERE stat_date = DATE_SUB((SELECT MAX(stat_date) FROM v_vehicle_daily_stats), INTERVAL 1 DAY)`
+        ) as [any[], unknown];
+        const map = new Map<string, number>();
+        for (const r of rows) {
+          const km = Number(r.daily_km) || 0;
+          const existing = map.get(r.plate) || 0;
+          if (km > existing) map.set(r.plate, km);
+        }
+        return map;
+      })(),
+      // 车辆关联信息
+      fetchVehicleInfoMap(),
+      // 考核批次→车牌映射
+      pool.execute(
+        `SELECT t.id, t.target_name, v.plate_number
+         FROM tab_mileage_assessment_target t
+         JOIN tab_mileage_assessment_vehicle v ON v.target_id = t.id AND v.is_deleted = 0
+         WHERE t.is_deleted = 0`
+      ).then(([rows]) => rows as { id: number; target_name: string; plate_number: string }[]),
+    ]);
+
+    // 构建批次映射
+    const targetPlatesMap = new Map<string, Set<string>>();
+    for (const r of targetRows) {
+      const set = targetPlatesMap.get(r.target_name) || new Set();
+      set.add(r.plate_number);
+      targetPlatesMap.set(r.target_name, set);
+    }
+    const targetNames = Array.from(targetPlatesMap.keys());
+
+    const vehicles = mergeVehicles(mileageRows, infoMap, yesterdayMap);
+
+    const totalToday = vehicles.reduce((sum, v) => sum + v.dailyKm, 0);
+    const totalAll = vehicles.reduce((sum, v) => sum + (v.totalKm || 0), 0);
+
+    monitoringCache = {
+      vehicles,
+      stats: { totalToday, totalAll, vehicleCount: vehicles.length },
+      filters: buildFilters(vehicles, targetNames),
+      targetPlatesMap,
+      updatedAt: new Date().toISOString(),
+    };
+
+    console.log(`[mileage] cache refreshed: ${vehicles.length} vehicles in ${Date.now() - start}ms`);
+  } catch (e: unknown) {
+    console.error('[mileage] cache refresh error:', e);
+  }
+}
+
+/** 查询指定日期的里程数据（不使用缓存） */
+export async function queryDateMileage(dateStr: string): Promise<CachedVehicle[]> {
+  const [mileageRows, yesterdayRows, infoMap] = await Promise.all([
+    mileagePool.execute(
+      'SELECT plate, vin, daily_km, total_km, source FROM v_vehicle_daily_stats WHERE stat_date = ?',
+      [dateStr]
+    ).then(([r]) => r as any[]),
+    mileagePool.execute(
+      'SELECT plate, daily_km FROM v_vehicle_daily_stats WHERE stat_date = DATE_SUB(?, INTERVAL 1 DAY)',
+      [dateStr]
+    ).then(([r]) => r as any[]),
+    fetchVehicleInfoMap(),
+  ]);
+
+  const yesterdayMap = new Map<string, number>();
+  for (const r of yesterdayRows) {
+    const km = Number(r.daily_km) || 0;
+    const existing = yesterdayMap.get(r.plate) || 0;
+    if (km > existing) yesterdayMap.set(r.plate, km);
+  }
+
+  return mergeVehicles(mileageRows, infoMap, yesterdayMap);
+}
+
+/** 构建指定日期数据的筛选选项 */
+export function buildDateFilters(vehicles: CachedVehicle[]): MonitoringFilters {
+  return buildFilters(vehicles, monitoringCache?.filters.targetNames || []);
+}
+```
+
+- [ ] **Step 2: Verify TypeScript compiles**
+
+Run: `npx tsc --noEmit`
+Expected: no errors
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/server/routes/mileage/cache.ts
+git commit -m "refactor: extract monitoring cache module"
+```
+
+---
+
+### Task 4: Create monitoring route handler
+
+**Files:**
+- Create: `src/server/routes/mileage/monitoring.ts`
+
+- [ ] **Step 1: Create the monitoring route**
+
+```typescript
+// src/server/routes/mileage/monitoring.ts
+import { Hono } from 'hono';
+import { getCache, queryDateMileage, buildDateFilters } from './cache.js';
+import type { CachedVehicle, MonitoringFilters, MonitoringResponse } from './types.js';
+
+const app = new Hono();
+
+const EMPTY_RESPONSE: MonitoringResponse = {
+  vehicles: [],
+  stats: { totalToday: 0, totalAll: 0, vehicleCount: 0, yesterdayTotal: 0 },
+  filters: { departments: [], customers: [], plates: [], projects: [], entities: [], rentStatuses: [], platePrefixes: [], targetNames: [] },
+  total: 0,
+  page: 1,
+  totalPages: 1,
+  updatedAt: new Date().toISOString(),
+};
+
+/** 应用筛选条件 */
+function applyFilters(vehicles: CachedVehicle[], params: {
+  search: string; dept: string; customer: string; project: string;
+  entity: string; rentStatus: string; plate: string; platePrefix: string;
+  targetName: string; mileageMin: string; mileageMax: string;
+}): CachedVehicle[] {
+  let result = vehicles;
+
+  if (params.search) {
+    const q = params.search.toLowerCase();
+    result = result.filter(v =>
+      v.plate.toLowerCase().includes(q) ||
+      (v.customer || '').toLowerCase().includes(q) ||
+      (v.project || '').toLowerCase().includes(q)
+    );
+  }
+  if (params.dept) result = result.filter(v => params.dept === '__EMPTY__' ? !v.department : v.department === params.dept);
+  if (params.customer) result = result.filter(v => params.customer === '__EMPTY__' ? !v.customer : v.customer === params.customer);
+  if (params.project) result = result.filter(v => v.project === params.project);
+  if (params.entity) result = result.filter(v => v.entity === params.entity);
+  if (params.rentStatus) result = result.filter(v => v.rentStatus === params.rentStatus);
+  if (params.plate) result = result.filter(v => v.plate === params.plate);
+  if (params.platePrefix) result = result.filter(v => v.plate.startsWith(params.platePrefix));
+  if (params.targetName) {
+    const cache = getCache();
+    const tPlates = cache?.targetPlatesMap.get(params.targetName);
+    result = tPlates ? result.filter(v => tPlates.has(v.plate)) : [];
+  }
+  if (params.mileageMin) result = result.filter(v => v.dailyKm >= Number(params.mileageMin));
+  if (params.mileageMax) result = result.filter(v => v.dailyKm <= Number(params.mileageMax));
+
+  return result;
+}
+
+app.get('/', async (c) => {
+  const sortBy = c.req.query('sortBy') || 'today';
+  const sortOrder = c.req.query('sortOrder') || 'desc';
+  const limit = Number(c.req.query('limit')) || 50;
+  const page = Number(c.req.query('page')) || 1;
+  const date = c.req.query('date') || '';
+
+  const filterParams = {
+    search: c.req.query('search') || '',
+    dept: c.req.query('dept') || '',
+    customer: c.req.query('customer') || '',
+    project: c.req.query('project') || '',
+    entity: c.req.query('entity') || '',
+    rentStatus: c.req.query('rentStatus') || '',
+    plate: c.req.query('plate') || '',
+    platePrefix: c.req.query('platePrefix') || '',
+    targetName: c.req.query('targetName') || '',
+    mileageMin: c.req.query('mileageMin') || '',
+    mileageMax: c.req.query('mileageMax') || '',
+  };
+
+  // 获取数据源
+  let allVehicles: CachedVehicle[];
+  let filters: MonitoringFilters;
+
+  if (date) {
+    try {
+      allVehicles = await queryDateMileage(date);
+      filters = buildDateFilters(allVehicles);
+    } catch (e: unknown) {
+      console.error('monitoring date query error:', e);
+      return c.json(EMPTY_RESPONSE, 500);
+    }
+  } else {
+    const cache = getCache();
+    if (!cache) return c.json(EMPTY_RESPONSE);
+    allVehicles = cache.vehicles;
+    filters = cache.filters;
+  }
+
+  // 筛选
+  const filtered = applyFilters(allVehicles, filterParams);
+
+  // 统计
+  const stats = {
+    totalToday: filtered.reduce((sum, v) => sum + v.dailyKm, 0),
+    totalAll: filtered.reduce((sum, v) => sum + (v.totalKm || 0), 0),
+    vehicleCount: filtered.length,
+    yesterdayTotal: filtered.reduce((sum, v) => sum + v.yesterdayKm, 0),
+  };
+
+  // 排序
+  const sorted = [...filtered].sort((a, b) => {
+    const valA = sortBy === 'today' ? a.dailyKm : (a.totalKm || 0);
+    const valB = sortBy === 'today' ? b.dailyKm : (b.totalKm || 0);
+    return sortOrder === 'desc' ? valB - valA : valA - valB;
+  });
+
+  // 分页
+  const offset = (page - 1) * limit;
+  const paged = sorted.slice(offset, offset + limit);
+  const total = filtered.length;
+
+  return c.json({
+    vehicles: paged,
+    stats,
+    filters,
+    total,
+    page,
+    totalPages: Math.ceil(total / limit),
+    updatedAt: date || getCache()?.updatedAt || new Date().toISOString(),
+  });
+});
+
+export default app;
+```
+
+- [ ] **Step 2: Verify TypeScript compiles**
+
+Run: `npx tsc --noEmit`
+Expected: no errors
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/server/routes/mileage/monitoring.ts
+git commit -m "refactor: create monitoring route handler"
+```
+
+---
+
+### Task 5: Create targets route handler
+
+**Files:**
+- Create: `src/server/routes/mileage/targets.ts`
+
+- [ ] **Step 1: Create the targets route**
+
+```typescript
+// src/server/routes/mileage/targets.ts
+import { Hono } from 'hono';
+import pool from '../../db.js';
+import mileagePool from '../../mileage-db.js';
+import { getCache } from './cache.js';
+import { fetchVehicleInfoByPlates } from './vehicle-info.js';
+
+const app = new Hono();
+
+// GET /targets — 考核项目列表 + 汇总
+app.get('/', async (c) => {
+  try {
+    const [targets] = await pool.execute(
+      'SELECT * FROM tab_mileage_assessment_target WHERE is_deleted = 0 ORDER BY id'
+    ) as [any[], unknown];
+
+    const [vehicleStats] = await pool.execute(`
+      SELECT
+        target_id, COUNT(*) as total,
+        SUM(today_mileage) as today_total,
+        SUM(current_mileage) as cumulative_total,
+        AVG(current_year_completion_rate) as avg_completion,
+        SUM(CASE WHEN is_qualified = 1 THEN 1 ELSE 0 END) as qualified_count,
+        SUM(CASE WHEN current_year_is_qualified = 1 THEN 1 ELSE 0 END) as year_qualified_count,
+        SUM(CASE WHEN current_year_completion_rate >= 0.5 THEN 1 ELSE 0 END) as half_qualified_count,
+        SUM(current_year_mileage_task) as current_year_target,
+        SUM(current_year_mileage) as current_year_completed,
+        MAX(current_year_assessment_end_date) as year_end_date
+      FROM tab_mileage_assessment_vehicle WHERE is_deleted = 0
+      GROUP BY target_id
+    `) as [any[], unknown];
+
+    const statsMap = new Map<number, any>();
+    for (const s of vehicleStats) statsMap.set(s.target_id, s);
+
+    const [periodRows] = await pool.execute(`
+      SELECT target_id,
+             DATE_FORMAT(assessment_start_date, '%Y-%m-%d') as start_date,
+             DATE_FORMAT(assessment_end_date, '%Y-%m-%d') as end_date,
+             COUNT(*) as cnt
+      FROM tab_mileage_assessment_vehicle WHERE is_deleted = 0
+      GROUP BY target_id, assessment_start_date, assessment_end_date
+      ORDER BY target_id, assessment_start_date
+    `) as [any[], unknown];
+
+    const periodsMap = new Map<number, string[]>();
+    for (const p of periodRows) {
+      const list = periodsMap.get(p.target_id) || [];
+      list.push(`${p.start_date} ~ ${p.end_date} (${p.cnt}台)`);
+      periodsMap.set(p.target_id, list);
+    }
+
+    // 使用监控缓存里程数据（与里程看板一致）
+    const cache = getCache();
+    const cacheVehicleMap = new Map<string, number>();
+    if (cache) {
+      for (const v of cache.vehicles) {
+        cacheVehicleMap.set(v.plate, Math.max(0, v.dailyKm || 0));
+      }
+    }
+
+    const [targetVehicleRows] = await pool.execute(
+      'SELECT target_id, plate_number FROM tab_mileage_assessment_vehicle WHERE is_deleted = 0'
+    ) as [{ target_id: number; plate_number: string }[], unknown];
+
+    const targetIdPlatesMap = new Map<number, string[]>();
+    for (const r of targetVehicleRows) {
+      const list = targetIdPlatesMap.get(r.target_id) || [];
+      list.push(r.plate_number);
+      targetIdPlatesMap.set(r.target_id, list);
+    }
+
+    const now = new Date();
+    const result = targets.map((t: any) => {
+      const s = statsMap.get(t.id) || {};
+      const currentYearTarget = Number(s.current_year_target) || 0;
+      const currentYearCompleted = Number(s.current_year_completed) || 0;
+      const remaining = Math.max(0, currentYearTarget - currentYearCompleted);
+      const yearEnd = s.year_end_date ? new Date(s.year_end_date) : now;
+      const daysLeft = Math.max(1, Math.ceil((yearEnd.getTime() - now.getTime()) / 86400000));
+      const dailyTarget = remaining / daysLeft;
+
+      const periods = periodsMap.get(t.id) || [];
+      if (periods.length === 0) {
+        const startDate = t.default_start_date ? new Date(t.default_start_date).toISOString().split('T')[0] : '';
+        const endDate = t.default_end_date ? new Date(t.default_end_date).toISOString().split('T')[0] : '';
+        if (startDate || endDate) periods.push(`${startDate} ~ ${endDate}`);
+      }
+
+      return {
+        id: t.id,
+        targetName: t.target_name,
+        vehicleCount: Number(s.total) || t.vehicle_count,
+        totalMileagePerVehicle: Number(t.total_mileage_per_vehicle),
+        annualMileagePerVehicle: Number(t.annual_mileage_per_vehicle),
+        assessmentYears: t.assessment_years,
+        periods,
+        todayTotal: (targetIdPlatesMap.get(t.id) || []).reduce((sum, plate) => sum + (cacheVehicleMap.get(plate) || 0), 0),
+        cumulativeTotal: Number(s.cumulative_total) || 0,
+        avgCompletion: (Number(s.avg_completion) || 0) * 100,
+        qualifiedCount: Number(s.qualified_count) || 0,
+        yearQualifiedCount: Number(s.year_qualified_count) || 0,
+        halfQualifiedCount: Number(s.half_qualified_count) || 0,
+        currentYearTarget,
+        currentYearCompleted,
+        remaining,
+        daysLeft,
+        dailyTarget: Math.round(dailyTarget * 10) / 10,
+      };
+    });
+
+    return c.json(result);
+  } catch (e: unknown) {
+    console.error('targets error:', e);
+    return c.json([], 500);
+  }
+});
+
+// GET /target/:id/vehicles — 某项目的车辆明细
+app.get('/:id/vehicles', async (c) => {
+  const targetId = c.req.param('id');
+  const date = c.req.query('date') || '';
+
+  try {
+    const [rows] = await pool.execute(
+      `SELECT plate_number, today_mileage, vehicle_total_mileage,
+              completion_rate, is_qualified, current_year_is_qualified,
+              daily_required_mileage
+       FROM tab_mileage_assessment_vehicle
+       WHERE target_id = ? AND is_deleted = 0
+       ORDER BY today_mileage DESC`,
+      [targetId]
+    ) as [any[], unknown];
+
+    const plates: string[] = rows.map((r: any) => r.plate_number);
+    const infoMap = await fetchVehicleInfoByPlates(plates);
+
+    // 指定日期时，从里程库查该日里程
+    const dateMileageMap = new Map<string, { dailyKm: number; totalKm: number | null; isOnline: boolean }>();
+    if (date && plates.length > 0) {
+      const [mileageRows] = await mileagePool.execute(
+        `SELECT plate, daily_km, total_km, source FROM v_vehicle_daily_stats
+         WHERE stat_date = ? AND plate IN (${plates.map(() => '?').join(',')})`,
+        [date, ...plates]
+      ) as [any[], unknown];
+      for (const m of mileageRows) {
+        const existing = dateMileageMap.get(m.plate);
+        const dailyKm = Number(m.daily_km) || 0;
+        if (!existing || dailyKm > existing.dailyKm) {
+          const source = m.source || 'NONE';
+          dateMileageMap.set(m.plate, {
+            dailyKm,
+            totalKm: m.total_km !== null ? Number(m.total_km) : null,
+            isOnline: source !== 'NONE' && dailyKm > 0,
+          });
+        }
+      }
+    }
+
+    const result = rows.map((r: any) => {
+      const info = infoMap.get(r.plate_number);
+      const dateMileage = date ? dateMileageMap.get(r.plate_number) : null;
+      return {
+        plateNumber: r.plate_number,
+        todayMileage: dateMileage ? dateMileage.dailyKm : (Number(r.today_mileage) || 0),
+        totalMileage: dateMileage?.totalKm ?? (Number(r.vehicle_total_mileage) || 0),
+        completionRate: Number(r.completion_rate) || 0,
+        isQualified: r.is_qualified === 1,
+        currentYearIsQualified: r.current_year_is_qualified === 1,
+        dailyRequiredMileage: Number(r.daily_required_mileage) || 0,
+        rentStatus: info?.rent_status || null,
+        department: info?.department || null,
+        customer: info?.customer || null,
+        isOnline: dateMileage ? dateMileage.isOnline : true,
+      };
+    });
+
+    return c.json(result);
+  } catch (e: unknown) {
+    console.error('target vehicles error:', e);
+    return c.json([], 500);
+  }
+});
+
+export default app;
+```
+
+- [ ] **Step 2: Verify TypeScript compiles**
+
+Run: `npx tsc --noEmit`
+Expected: no errors
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/server/routes/mileage/targets.ts
+git commit -m "refactor: create targets route handler"
+```
+
+---
+
+### Task 6: Create trend route handler
+
+**Files:**
+- Create: `src/server/routes/mileage/trend.ts`
+
+- [ ] **Step 1: Create the trend route**
+
+```typescript
+// src/server/routes/mileage/trend.ts
+import { Hono } from 'hono';
+import pool from '../../db.js';
+import mileagePool from '../../mileage-db.js';
+
+const app = new Hono();
+
+app.get('/', async (c) => {
+  const targetId = c.req.query('targetId');
+  const days = Number(c.req.query('days')) || 7;
+
+  try {
+    let plates: string[] = [];
+    if (targetId) {
+      const [vehicleRows] = await pool.execute(
+        'SELECT plate_number FROM tab_mileage_assessment_vehicle WHERE target_id = ? AND is_deleted = 0',
+        [targetId]
+      ) as [{ plate_number: string }[], unknown];
+      plates = vehicleRows.map(r => r.plate_number);
+      if (plates.length === 0) return c.json([]);
+    }
+
+    let sql = `
+      SELECT DATE_FORMAT(stat_date, '%m-%d') as date, SUM(daily_km) as mileage
+      FROM v_vehicle_daily_stats
+      WHERE stat_date >= DATE_SUB(CURDATE(), INTERVAL ? DAY) AND stat_date < CURDATE()
+    `;
+    const params: (string | number)[] = [days];
+
+    if (plates.length > 0) {
+      sql += ` AND plate IN (${plates.map(() => '?').join(',')})`;
+      params.push(...plates);
+    }
+
+    sql += ' GROUP BY stat_date ORDER BY stat_date';
+
+    const [rows] = await mileagePool.execute(sql, params) as [any[], unknown];
+
+    return c.json(rows.map((r: any) => ({
+      date: r.date,
+      mileage: Math.round(Number(r.mileage) || 0),
+    })));
+  } catch (e: unknown) {
+    console.error('trend error:', e);
+    return c.json([], 500);
+  }
+});
+
+export default app;
+```
+
+- [ ] **Step 2: Verify TypeScript compiles**
+
+Run: `npx tsc --noEmit`
+Expected: no errors
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/server/routes/mileage/trend.ts
+git commit -m "refactor: create trend route handler"
+```
+
+---
+
+### Task 7: Assemble new index and swap in
+
+**Files:**
+- Create: `src/server/routes/mileage/index.ts`
+- Delete: `src/server/routes/mileage.ts`
+
+- [ ] **Step 1: Create the new index**
+
+```typescript
+// src/server/routes/mileage/index.ts
+import { Hono } from 'hono';
+import { refreshMonitoringCache } from './cache.js';
+import monitoringRouter from './monitoring.js';
+import targetsRouter from './targets.js';
+import trendRouter from './trend.js';
+
+const app = new Hono();
+
+app.route('/monitoring', monitoringRouter);
+app.route('/targets', targetsRouter);
+app.route('/target', targetsRouter);
+app.route('/trend', trendRouter);
+
+// 启动时立即刷新缓存，之后每分钟刷新
+refreshMonitoringCache();
+setInterval(refreshMonitoringCache, 60 * 1000);
+
+export default app;
+```
+
+- [ ] **Step 2: Delete the old monolith**
+
+```bash
+rm src/server/routes/mileage.ts
+```
+
+- [ ] **Step 3: Verify TypeScript compiles**
+
+Run: `npx tsc --noEmit`
+Expected: no errors
+
+- [ ] **Step 4: Verify the server starts and API works**
+
+Run: `npm run dev` and test:
+- `curl http://localhost:3001/api/mileage/monitoring?limit=2` — should return vehicles
+- `curl http://localhost:3001/api/mileage/targets` — should return target list
+- `curl http://localhost:3001/api/mileage/trend?days=7` — should return trend data
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/server/routes/mileage/ && git add -u src/server/routes/mileage.ts
+git commit -m "refactor: replace mileage monolith with modular route files"
+```
+
+---
+
+### Task 8: Fix the stale comment and final cleanup
+
+**Files:**
+- Modify: `src/server/routes/mileage/cache.ts`
+
+- [ ] **Step 1: Verify no leftover references to old file**
+
+Run: `grep -r "routes/mileage.js" src/` — should only find `src/server/index.ts` which imports `./routes/mileage.js`. Since we moved to `mileage/index.ts`, the import path `./routes/mileage.js` resolves to `./routes/mileage/index.js` automatically. No change needed.
+
+- [ ] **Step 2: Verify full build**
+
+Run: `npx tsc --noEmit && npm run build`
+Expected: no errors
+
+- [ ] **Step 3: Final commit**
+
+```bash
+git commit --allow-empty -m "refactor: mileage backend refactor complete — verified build"
+```