feat(ui): 专业风UI改造 主色#275354 + Brand系统标题统一

- 全量替换游戏感Neo-Brutalist为政务专业风：圆角2-16px、薄灰边、柔阴影
- Tailwind主题：primary 10阶调色板 + Noto Sans SC主字体 + fade-in-up动画
- 全局CSS：浅灰F6F8F9背景 + 主色焦点环和滚动条 + card/chip工具类
- 品牌组件Brand.tsx：云图形截断防云盘旧字泄露 + 新标题组合
- 6基础组件 + 8页面：Layout深绿侧栏 Login卡片 Export去五色卡 Activities/Hours/Users 用户端Index/Dashboard
- 数据链路回归：u/2张三2h明细正确显示
- tsc无错误  vite build成功

client/tailwind.config.ts

@@ -1,31 +1,44 @@
 import type { Config } from 'tailwindcss';
 
+const PRIMARY = '#275354';
+
 const config: Config = {
   content: ['./index.html', './src/**/*.{ts,tsx}'],
   theme: {
     borderRadius: {
-      DEFAULT: '0px',
       none: '0px',
-      sm: '0px',
-      md: '0px',
-      lg: '0px',
-      xl: '0px',
-      '2xl': '0px',
+      sm: '2px',
+      DEFAULT: '4px',
+      md: '6px',
+      lg: '8px',
+      xl: '12px',
+      '2xl': '16px',
       full: '9999px',
     },
     boxShadow: {
-      DEFAULT: '4px 4px 0 0 #0f172a',
-      sm: '2px 2px 0 0 #0f172a',
-      lg: '6px 6px 0 0 #0f172a',
-      xl: '8px 8px 0 0 #0f172a',
-      none: '0 0 0 0 #000',
-      amber: '4px 4px 0 0 #b45309',
+      sm: '0 1px 2px 0 rgba(15, 23, 42, 0.06), 0 1px 1px -1px rgba(15, 23, 42, 0.06)',
+      DEFAULT: '0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.05)',
+      md: '0 4px 6px -2px rgba(15, 23, 42, 0.08), 0 2px 4px -3px rgba(15, 23, 42, 0.05)',
+      lg: '0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.05)',
+      xl: '0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.06)',
+      none: 'none',
     },
     colors: {
-      black: '#0f172a',
-      ink: '#020617',
+      ink: '#0F172A',
       white: '#FFFFFF',
-      paper: '#fafaf6',
+      paper: '#F6F8F9',
+      primary: {
+        50: '#EFF6F6',
+        100: '#D8E8E8',
+        200: '#B1D1D1',
+        300: '#82B1B2',
+        400: '#558A8B',
+        500: PRIMARY,
+        600: '#1E4041',
+        700: '#173334',
+        800: '#102626',
+        900: '#0B1B1B',
+      },
       gray: {
         50: '#F8FAFC',
         100: '#F1F5F9',
@@ -38,25 +51,6 @@ const config: Config = {
         800: '#1E293B',
         900: '#0F172A',
       },
-      blue: {
-        50: '#EFF6FF',
-        100: '#DBEAFE',
-        200: '#BFDBFE',
-        400: '#60A5FA',
-        500: '#2563EB',
-        600: '#1D4ED8',
-        700: '#1E40AF',
-        800: '#1E3A8A',
-      },
-      amber: {
-        50: '#FFFBEB',
-        100: '#FEF3C7',
-        300: '#FCD34D',
-        400: '#FBBF24',
-        500: '#F59E0B',
-        600: '#D97706',
-        700: '#B45309',
-      },
       red: {
         400: '#F87171',
         500: '#EF4444',
@@ -67,6 +61,13 @@ const config: Config = {
         400: '#4ADE80',
         500: '#22C55E',
         600: '#16A34A',
+        700: '#15803D',
+      },
+      amber: {
+        400: '#FBBF24',
+        500: '#F59E0B',
+        600: '#D97706',
+        700: '#B45309',
       },
     },
     fontFamily: {
@@ -74,26 +75,17 @@ const config: Config = {
         '"Noto Sans SC"', '"PingFang SC"', '"Microsoft YaHei"',
         'ui-sans-serif', 'system-ui', 'sans-serif',
       ],
-      display: [
-        '"Instrument Serif"', '"Noto Serif SC"', '"Source Han Serif"',
-        '"Songti SC"', 'SimSun', 'serif',
-      ],
-      mono: ['JetBrains Mono', 'ui-monospace', 'SFMono-Regular', 'monospace'],
+      mono: ['"JetBrains Mono"', 'ui-monospace', 'SFMono-Regular', 'monospace'],
     },
     extend: {
       keyframes: {
-        'stagger-in': {
-          '0%': { opacity: '0', transform: 'translateY(8px)' },
-          '100%': { opacity: '1', transform: 'translateY(0)' },
-        },
-        'slide-down': {
-          '0%': { opacity: '0', transform: 'translateY(-16px)' },
+        'fade-in-up': {
+          '0%': { opacity: '0', transform: 'translateY(6px)' },
           '100%': { opacity: '1', transform: 'translateY(0)' },
         },
       },
       animation: {
-        'stagger-in': 'stagger-in 0.3s ease-out both',
-        'slide-down': 'slide-down 0.25s ease-out both',
+        'fade-in-up': 'fade-in-up 0.25s ease-out both',
       },
     },
   },