fix: 内置角色可编辑不可删除，修复种子迁移覆盖用户权限

- admin/operator/viewer 均为内置不可删除，但可编辑
- 移除 initDatabase() 中的权限合并迁移逻辑，避免每次启动覆盖用户自定义权限
- admin 在 API 层禁止删除

CHANGELOG.md

@@ -2,6 +2,16 @@
 
 ## 2026-05-14
 
+- [新增] 权限系统重构：工单细粒度权限（`tickets:create` 手动建单、`tickets:import` 导入、`tickets:export` 导出），`tickets:write` 缩窄为编辑/删除
+- [新增] 报告三层权限：`reports:read`（查看列表+预览）、`reports:download`（下载）、`reports:create`（新建+生成文档+删除）
+- [新增] `/api/auth/me` 返回 `permissions` 字段，前端根据权限数组控制按钮和导航显隐
+- [新增] 角色管理 UI 权限项从 8 个扩展到 14 个（含 `api-keys:read/write`）
+- [修复] 角色管理页面：admin/operator/viewer 标记为"内置"不可删除但可编辑，admin 在 API 层禁止删除
+- [修复] 报告 API 路由全部补全权限检查（此前列表/预览/下载/删除均无权限检查）
+- [修复] 导出工单 API 新增 `tickets:export` 权限检查（此前仅验证登录态）
+- [修复] POST 创建报告权限从错误的 `reports:read` 修正为 `reports:create`
+- [修复] `reports:write` 全面替换为 `reports:create`
+- [修复] 种子数据迁移逻辑不再每次启动覆盖用户自定义权限，仅首次安装时创建默认权限
 - [修复] SSO 新用户免登录失败：根页面 `getCurrentUser()` 改为直接 `redirect('/dashboard')`，由中间件统一处理共享 JWT 认证（与 assets-ai 行为一致）
 - [修复] `next.config.ts` 添加 `ldapts` 到 `serverExternalPackages`，确保 Next.js standalone 构建包含 LLDAP 客户端模块，避免 `ldapUserExists()` 因模块缺失失败导致 SSO 自动创建用户静默中断
 - [调整] 全局证书切换：Cloudflare Origin CA → Let's Encrypt（`/etc/letsencrypt/live/www.tlyq.ai/`），覆盖全部 7 个子域名，nginx 8 个站点配置同步更新

src/app/(app)/settings/roles/page.tsx

@@ -11,6 +11,8 @@ interface Role {
   created_at: string
 }
 
+const BUILTIN_ROLES = ['admin', 'operator', 'viewer']
+
 const allPermissions = [
   { key: 'tickets:read', label: '查看工单' },
   { key: 'tickets:create', label: '手动建单' },
@@ -96,8 +98,6 @@ export default function RolesPage() {
     } catch { return '无权限' }
   }
 
-  const builtinRoles = ['admin', 'operator', 'viewer']
-
   return (
     <div className="space-y-4">
       <div className="flex items-center justify-between">
@@ -115,12 +115,19 @@ export default function RolesPage() {
           {roles.map(r => (
             <tr key={r.id} className="hover:bg-slate-50 dark:hover:bg-slate-800/50 transition-colors">
               <td className="px-4 py-3 font-medium text-slate-900 dark:text-slate-100">{r.name}</td>
-              <td className="px-4 py-3 text-slate-700 dark:text-slate-300">{r.display_name}</td>
+              <td className="px-4 py-3 text-slate-700 dark:text-slate-300">
+                <div className="flex items-center gap-2">
+                  <span>{r.display_name}</span>
+                  {BUILTIN_ROLES.includes(r.name) && (
+                    <Badge variant="info">内置</Badge>
+                  )}
+                </div>
+              </td>
               <td className="px-4 py-3 text-slate-500 dark:text-slate-400 text-sm">{formatPermissions(r.permissions)}</td>
               <td className="px-4 py-3">
                 <div className="flex items-center gap-1">
                   <Button variant="ghost" size="sm" onClick={() => openEdit(r)}><Pencil size={14} /></Button>
-                  {!builtinRoles.includes(r.name) && (
+                  {!BUILTIN_ROLES.includes(r.name) && (
                     <Button variant="ghost" size="sm" onClick={() => handleDelete(r.id)}><Trash2 size={14} className="text-red-500" /></Button>
                   )}
                 </div>

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

@@ -15,7 +15,7 @@ export async function PUT(request: NextRequest, { params }: { params: Promise<{
     const body = await request.json()
     const db = getDb()
 
-    const existing = db.prepare('SELECT * FROM roles WHERE id = ?').get(id)
+    const existing = db.prepare('SELECT * FROM roles WHERE id = ?').get(id) as any
     if (!existing) return NextResponse.json({ error: '角色不存在' }, { status: 404 })
 
     const fields: string[] = []

src/lib/db-schema.ts

@@ -63,20 +63,7 @@ export function initDatabase(): void {
     { name: 'viewer', display_name: '查看者', permissions: '["tickets:read","tickets:export","reports:read","reports:download"]' },
   ]
   for (const r of roles) {
-    const ex = db.prepare('SELECT id, permissions FROM roles WHERE name = ?').get(r.name) as { id: number; permissions: string } | undefined
-    if (!ex) {
-      db.prepare('INSERT INTO roles (name, display_name, permissions) VALUES (?, ?, ?)').run(r.name, r.display_name, r.permissions)
-    } else {
-      // 迁移：更新已有角色的权限（追加新权限，保留已有自定义）
-      const newPerms = JSON.parse(r.permissions) as string[]
-      let existingPerms: string[] = []
-      try { existingPerms = JSON.parse(ex.permissions) } catch {}
-      if (!existingPerms.includes('*')) {
-        for (const p of newPerms) {
-          if (!existingPerms.includes(p)) existingPerms.push(p)
-        }
-        db.prepare('UPDATE roles SET permissions = ? WHERE id = ?').run(JSON.stringify(existingPerms), ex.id)
-      }
-    }
+    const ex = db.prepare('SELECT id FROM roles WHERE name = ?').get(r.name)
+    if (!ex) db.prepare('INSERT INTO roles (name, display_name, permissions) VALUES (?, ?, ?)').run(r.name, r.display_name, r.permissions)
   }
 }