feat(web): 从 Notion 风格切换到 Pinterest 设计系统

- 替换 DESIGN.md 为 Pinterest 设计规格（暖色调、红色主题、大圆角）
- 更新 CSS 变量：主色 #0075de→#e60023, 圆角 4px→16px, 背景 #f6f5f4→#f6f6f3
- 更新 Ant Design 主题令牌：更大圆角、Pinterest 色板、更大触控目标
- 批量更新 24 个页面/组件文件中的硬编码颜色值
- 暗色模式同步适配 Pinterest 暖色调暗色方案

apps/web/src/pages/graph/graphRenderer.ts

@@ -11,11 +11,11 @@ import type { GraphEdge } from './graphTypes';
 
 /** 关系类型对应的色板 (base / light / glow) — 通用调色板自动分配 */
 const EDGE_PALETTE: Array<{ base: string; light: string; glow: string }> = [
-  { base: '#0075de', light: '#62aef0', glow: 'rgba(79,70,229,0.3)' },
-  { base: '#1aae39', light: '#34D399', glow: 'rgba(5,150,105,0.3)' },
-  { base: '#dd5b00', light: '#FBBF24', glow: 'rgba(217,119,6,0.3)' },
+  { base: '#e60023', light: '#f05a5a', glow: 'rgba(79,70,229,0.3)' },
+  { base: '#103c25', light: '#34D399', glow: 'rgba(5,150,105,0.3)' },
+  { base: '#b56e1a', light: '#FBBF24', glow: 'rgba(217,119,6,0.3)' },
   { base: '#0891B2', light: '#22D3EE', glow: 'rgba(8,145,178,0.3)' },
-  { base: '#e5534b', light: '#F87171', glow: 'rgba(220,38,38,0.3)' },
+  { base: '#9e0a0a', light: '#F87171', glow: 'rgba(220,38,38,0.3)' },
   { base: '#7C3AED', light: '#A78BFA', glow: 'rgba(124,58,237,0.3)' },
   { base: '#EA580C', light: '#FB923C', glow: 'rgba(234,88,12,0.3)' },
   { base: '#DB2777', light: '#F472B6', glow: 'rgba(219,39,119,0.3)' },