feat: BossAi v2.0 UI/UX 重构 + 看板断点续接 + 多轮上下文

- 新增 web2/ 前端:任务卡看板、风险雷达、决策日志、我的团队、快捷指令
- ChatPanel 增强:风险卡置顶、案卡接入、起诉状向导、语音输入
- 事项看板:点击查看详情弹窗、断点续接(恢复历史对话+matterId)
- 保密模式恢复:密码验证后重建内存 session,保留多轮上下文
- 多轮对话:ask/ask-stream/ask-analyze 注入 session 历史,AI 有上下文
- 追问优化:紧扣用户问题,不再偏离主题(社保问社保,工伤问工伤)
- 对话区可滚动,输入区固定可见
- 状态机放宽:允许从任意非终态转到 pending_expert
- session 存活检查端点,后端重启后自动重建 session
- DB migration:风险推送表、案卡表

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

web2/tailwind.config.js

@@ -0,0 +1,94 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  darkMode: ['class'],
+  content: ['./index.html', './src/**/*.{ts,tsx}'],
+  theme: {
+    container: {
+      center: true,
+      padding: '1rem',
+      screens: { '2xl': '1400px' },
+    },
+    extend: {
+      colors: {
+        border: 'hsl(var(--border))',
+        input: 'hsl(var(--input))',
+        ring: 'hsl(var(--ring))',
+        background: 'hsl(var(--background))',
+        foreground: 'hsl(var(--foreground))',
+        primary: {
+          DEFAULT: 'hsl(var(--primary))',
+          foreground: 'hsl(var(--primary-foreground))',
+        },
+        secondary: {
+          DEFAULT: 'hsl(var(--secondary))',
+          foreground: 'hsl(var(--secondary-foreground))',
+        },
+        destructive: {
+          DEFAULT: 'hsl(var(--destructive))',
+          foreground: 'hsl(var(--destructive-foreground))',
+        },
+        muted: {
+          DEFAULT: 'hsl(var(--muted))',
+          foreground: 'hsl(var(--muted-foreground))',
+        },
+        accent: {
+          DEFAULT: 'hsl(var(--accent))',
+          foreground: 'hsl(var(--accent-foreground))',
+        },
+        card: {
+          DEFAULT: 'hsl(var(--card))',
+          foreground: 'hsl(var(--card-foreground))',
+        },
+        popover: {
+          DEFAULT: 'hsl(var(--popover))',
+          foreground: 'hsl(var(--popover-foreground))',
+        },
+        // 风险等级语义色
+        risk: {
+          green: 'hsl(142 71% 45%)',
+          amber: 'hsl(38 92% 50%)',
+          orange: 'hsl(25 95% 53%)',
+          red: 'hsl(0 84% 60%)',
+        },
+        // 案卡状态色
+        matter: {
+          new: 'hsl(217 91% 60%)',         // blue
+          asking: 'hsl(38 92% 50%)',        // amber
+          confirm: 'hsl(243 75% 59%)',      // indigo
+          analyzing: 'hsl(262 83% 58%)',    // purple
+          expert: 'hsl(25 95% 53%)',        // orange
+          closed: 'hsl(220 9% 46%)',        // gray
+        },
+      },
+      borderRadius: {
+        xl: 'calc(var(--radius) + 4px)',
+        lg: 'var(--radius)',
+        md: 'calc(var(--radius) - 2px)',
+        sm: 'calc(var(--radius) - 4px)',
+      },
+      fontFamily: {
+        sans: ['Geist', 'system-ui', '-apple-system', 'sans-serif'],
+      },
+      keyframes: {
+        'slide-up': {
+          from: { transform: 'translateY(100%)' },
+          to: { transform: 'translateY(0)' },
+        },
+        'slide-down': {
+          from: { transform: 'translateY(0)' },
+          to: { transform: 'translateY(100%)' },
+        },
+        'fade-in': {
+          from: { opacity: '0' },
+          to: { opacity: '1' },
+        },
+      },
+      animation: {
+        'slide-up': 'slide-up 300ms ease-out',
+        'slide-down': 'slide-down 200ms ease-in',
+        'fade-in': 'fade-in 200ms ease-out',
+      },
+    },
+  },
+  plugins: [require('tailwindcss-animate'), require('@tailwindcss/typography')],
+}