fix: 补全4处审计日志缺失 + audit_logs.username列迁移

- api-keys/[id] PUT: 添加 diffObjects 变更审计
- reports/[id] DELETE: 添加删除报告快照审计
- auth/logout POST: 从 session cookie 提取 username 记录登出审计
- reports/download POST: 添加 export 审计
- db-schema: 添加 audit_logs.username/api_key_id 列迁移(修复审计日志静默失败)

src/app/api/api-keys/[id]/route.ts

@@ -3,7 +3,7 @@ import { cookies } from 'next/headers'
 import { getDb } from '@/lib/db'
 import { verifyToken } from '@/lib/auth'
 import { checkPermission } from '@/lib/permissions'
-import { writeAuditLog, getClientIP } from '@/lib/audit'
+import { writeAuditLog, getClientIP, diffObjects } from '@/lib/audit'
 
 async function getSession() {
   const cookieStore = await cookies()
@@ -20,7 +20,8 @@ export async function PUT(request: Request, { params }: { params: Promise<{ id:
   }
 
   const { id } = await params
-  const existing = getDb().prepare('SELECT id FROM api_keys WHERE id = ?').get(id)
+  type ApiKeyRow = { id: number; name: string; permissions: string; expires_at: string | null; is_active: number }
+  const existing = getDb().prepare<[string | number], ApiKeyRow>('SELECT id, name, permissions, expires_at, is_active FROM api_keys WHERE id = ?').get(id)
   if (!existing) return NextResponse.json({ error: 'API Key 不存在' }, { status: 404 })
 
   try {
@@ -35,6 +36,20 @@ export async function PUT(request: Request, { params }: { params: Promise<{ id:
       is_active !== undefined ? (is_active ? 1 : 0) : 1,
       id
     )
+
+    // 审计日志
+    const changes = diffObjects(existing as unknown as Record<string, unknown>, body)
+    if (Object.keys(changes).length > 0) {
+      writeAuditLog({
+        userId: session.id,
+        action: 'update',
+        entityType: 'api_key',
+        entityId: Number(id),
+        details: { changes },
+        ipAddress: getClientIP(request),
+      })
+    }
+
     return NextResponse.json({ success: true })
   } catch (e) {
     const msg = e instanceof Error ? e.message : '更新失败'

src/app/api/auth/logout/route.ts

@@ -1,5 +1,6 @@
 // GET + POST /api/auth/logout — 退出登录（清除 cookie + 302 跳转 /login）
-import { NextResponse } from 'next/server'
+import { NextRequest, NextResponse } from 'next/server'
+import { writeAuditLog, getClientIP } from '@/lib/audit'
 
 const cookieDomain = process.env.COOKIE_DOMAIN || '.tlyq.ai'
 
@@ -22,4 +23,28 @@ function logoutResponse(): NextResponse {
 }
 
 export async function GET() { return logoutResponse() }
-export async function POST() { return logoutResponse() }
+
+export async function POST(request: NextRequest) {
+  // 从 session cookie 提取用户名用于审计
+  let username = 'anonymous'
+  try {
+    const token =
+      request.cookies.get('tlyq_session')?.value ||
+      request.cookies.get('session_issue')?.value
+    if (token) {
+      const payload = JSON.parse(Buffer.from(token.split('.')[1], 'base64').toString())
+      username = payload.username || 'unknown'
+    }
+  } catch { /* 解析失败，使用默认值 */ }
+
+  writeAuditLog({
+    userId: null,
+    username,
+    action: 'logout',
+    entityType: 'auth',
+    details: { message: '用户登出' },
+    ipAddress: getClientIP(request),
+  })
+
+  return logoutResponse()
+}

src/app/api/reports/[id]/route.ts

@@ -3,6 +3,7 @@ import { getDb } from '@/lib/db'
 import { initDatabase } from '@/lib/db-schema'
 import { getCurrentUser } from '@/lib/auth'
 import { hasPermission } from '@/lib/permissions'
+import { writeAuditLog, getClientIP } from '@/lib/audit'
 import fs from 'fs'
 
 export async function GET(_request: Request, { params }: { params: Promise<{ id: string }> }) {
@@ -89,6 +90,16 @@ export async function DELETE(_request: NextRequest, { params }: { params: Promis
     // 删除数据库记录
     db.prepare('DELETE FROM reports WHERE id = ?').run(id)
 
+    writeAuditLog({
+      userId: user.id,
+      apiKeyId: null,
+      action: 'delete',
+      entityType: 'report',
+      entityId: Number(id),
+      details: { deleted: { id: Number(id), title: report.title, type: report.type, period_start: report.period_start, period_end: report.period_end, file_path: report.file_path } },
+      ipAddress: getClientIP(_request),
+    })
+
     return NextResponse.json({ success: true })
   } catch (e) {
     const msg = e instanceof Error ? e.message : '删除失败'

src/app/api/reports/download/route.ts

@@ -3,6 +3,7 @@ import { getDb } from '@/lib/db'
 import { initDatabase } from '@/lib/db-schema'
 import { getCurrentUser } from '@/lib/auth'
 import { hasPermission } from '@/lib/permissions'
+import { writeAuditLog, getClientIP } from '@/lib/audit'
 import JSZip from 'jszip'
 import fs from 'fs'
 
@@ -43,6 +44,16 @@ export async function POST(request: NextRequest) {
 
     const zipBuffer = await zip.generateAsync({ type: 'nodebuffer' })
 
+    writeAuditLog({
+      userId: user.id,
+      apiKeyId: null,
+      action: 'export',
+      entityType: 'report',
+      entityId: null,
+      details: { exported_count: ids.length, ids },
+      ipAddress: getClientIP(request),
+    })
+
     const d = new Date()
     const today = `${d.getFullYear()}-${String(d.getMonth()+1).padStart(2,'0')}-${String(d.getDate()).padStart(2,'0')}`
     const downloadName = `reports_${today}.zip`