feat: 角色等级体系与权限管控实施

- 数据库：auth_roles 表新增 level 字段（1=超管, 10=管理员, 100=普通用户）
- 后端：新增 GetAllRoles/GetUserMaxLevel/SetUserRoles/FindByCodeList DAO 方法
- 后端：SetRolesRequest 替换 AssignRoleRequest，AdminUserInfo.Roles 改为 []RoleInfo
- 后端：所有管理操作（禁用/启用/角色分配/创建用户）强制层级权限校验
- 后端：PUT /users/:id/roles（批量设置角色）+ GET /roles（角色列表）
- 前端：角色管理改为 Checkbox Group 多选，高等级角色禁用
- 前端：禁用/启用按钮受角色层级约束，列表页操作按钮权限管控
- 前端：创建用户对话框角色选项根据操作者等级动态过滤
- 文档：API 文档、设计方案、集成规范、进度文档同步更新

Made-with: Cursor

design-system/echochat/MASTER.md

@@ -7,7 +7,7 @@
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 **Project:** EchoChat
-**Generated:** 2026-03-02 10:27:26
+**Generated:** 2026-03-02 15:16:13
 **Category:** Analytics Dashboard
 
 ---
@@ -163,10 +163,14 @@
 
 ### Page Pattern
 
-**Pattern Name:** Data-Dense + Drill-Down
+**Pattern Name:** Horizontal Scroll Journey
 
-- **CTA Placement:** Above fold
-- **Section Order:** Hero > Features > CTA
+- **Conversion Strategy:** Immersive product discovery. High engagement. Keep navigation visible.
+28,Bento Grid Showcase,bento,  grid,  features,  modular,  apple-style,  showcase", 1. Hero, 2. Bento Grid (Key Features), 3. Detail Cards, 4. Tech Specs, 5. CTA, Floating Action Button or Bottom of Grid, Card backgrounds: #F5F5F7 or Glass. Icons: Vibrant brand colors. Text: Dark., Hover card scale (1.02), video inside cards, tilt effect, staggered reveal, Scannable value props. High information density without clutter. Mobile stack.
+29,Interactive 3D Configurator,3d,  configurator,  customizer,  interactive,  product", 1. Hero (Configurator), 2. Feature Highlight (synced), 3. Price/Specs, 4. Purchase, Inside Configurator UI + Sticky Bottom Bar, Neutral studio background. Product: Realistic materials. UI: Minimal overlay., Real-time rendering, material swap animation, camera rotate/zoom, light reflection, Increases ownership feeling. 360 view reduces return rates. Direct add-to-cart.
+30,AI-Driven Dynamic Landing,ai,  dynamic,  personalized,  adaptive,  generative", 1. Prompt/Input Hero, 2. Generated Result Preview, 3. How it Works, 4. Value Prop, Input Field (Hero) + 'Try it' Buttons, Adaptive to user input. Dark mode for compute feel. Neon accents., Typing text effects, shimmering generation loaders, morphing layouts, Immediate value demonstration. 'Show, don't tell'. Low friction start.
+- **CTA Placement:** Floating Sticky CTA or End of Horizontal Track
+- **Section Order:** 1. Intro (Vertical), 2. The Journey (Horizontal Track), 3. Detail Reveal, 4. Vertical Footer
 
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