feat: v2.1.0 核心重构与功能增强

## 架构重构
- 全局变量消除，迁移至 Config/State 对象
- SMB 插件融合（smb/smb2/smbghost/smbinfo）
- 服务探测重构，实现 Nmap 风格 fallback 机制
- 输出系统重构，TXT 实时刷盘 + 双写机制
- i18n 框架升级至 go-i18n

## 性能优化
- 正则表达式预编译
- 内存优化 map[string]struct{}
- 并发指纹匹配
- SOCKS5 连接复用
- 滑动窗口调度 + 自适应线程池

## 新功能
- Web 管理界面
- 多格式 POC 适配（xray/afrog）
- 增强指纹库（3139条）
- Favicon hash 指纹识别
- 插件选择性编译（Build Tags）
- fscan-lab 靶场环境
- 默认端口扩展（62→133）

## 构建系统
- 添加 no_local tag 支持排除本地插件
- 多版本构建：fscan/fscan-nolocal/fscan-web
- CI 添加 snapshot 模式支持仅测试构建

## Bug 修复
- 修复 120+ 个问题，包括 RDP panic、批量扫描漏报、
  JSON 输出格式、Redis 检测、Context 超时等

## 测试增强
- 单元测试覆盖率 74-100%
- 并发安全测试
- 集成测试（Web/端口/服务/SSH/ICMP）

web-ui/src/index.css

@@ -0,0 +1,257 @@
+@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600&display=swap');
+
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@layer base {
+  :root {
+    --background: 0 0% 99%;
+    --foreground: 220 14% 10%;
+    --card: 0 0% 100%;
+    --card-foreground: 220 14% 10%;
+    --popover: 0 0% 100%;
+    --popover-foreground: 220 14% 10%;
+    --primary: 220 14% 10%;
+    --primary-foreground: 0 0% 99%;
+    --secondary: 220 13% 95%;
+    --secondary-foreground: 220 14% 10%;
+    --muted: 220 13% 95%;
+    --muted-foreground: 220 9% 46%;
+    --accent: 220 13% 95%;
+    --accent-foreground: 220 14% 10%;
+    --destructive: 0 72% 51%;
+    --destructive-foreground: 0 0% 99%;
+    --border: 220 13% 90%;
+    --input: 220 13% 90%;
+    --ring: 220 14% 10%;
+    --radius: 0.5rem;
+    --success: 142 71% 45%;
+    --warning: 38 92% 50%;
+    /* Chart colors */
+    --chart-1: 217 91% 60%;
+    --chart-2: 160 84% 39%;
+    --chart-3: 43 96% 56%;
+    --chart-4: 0 72% 51%;
+    --chart-5: 262 83% 58%;
+  }
+
+  .dark {
+    --background: 220 16% 6%;
+    --foreground: 220 13% 95%;
+    --card: 220 16% 8%;
+    --card-foreground: 220 13% 95%;
+    --popover: 220 16% 8%;
+    --popover-foreground: 220 13% 95%;
+    --primary: 220 13% 95%;
+    --primary-foreground: 220 16% 6%;
+    --secondary: 220 14% 14%;
+    --secondary-foreground: 220 13% 95%;
+    --muted: 220 14% 14%;
+    --muted-foreground: 220 9% 55%;
+    --accent: 220 14% 14%;
+    --accent-foreground: 220 13% 95%;
+    --destructive: 0 62% 50%;
+    --destructive-foreground: 220 13% 95%;
+    --border: 220 14% 16%;
+    --input: 220 14% 16%;
+    --ring: 220 13% 95%;
+    --success: 142 71% 45%;
+    --warning: 38 92% 50%;
+    /* Chart colors */
+    --chart-1: 217 91% 65%;
+    --chart-2: 160 84% 45%;
+    --chart-3: 43 96% 60%;
+    --chart-4: 0 72% 55%;
+    --chart-5: 262 83% 65%;
+  }
+}
+
+@layer base {
+  * {
+    @apply border-border;
+  }
+
+  /* 响应式基础字体 - 放大 */
+  html {
+    font-size: 15px;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+  }
+
+  @media (min-width: 640px) {
+    html {
+      font-size: 16px;
+    }
+  }
+
+  @media (min-width: 1024px) {
+    html {
+      font-size: 17px;
+    }
+  }
+
+  @media (min-width: 1280px) {
+    html {
+      font-size: 18px;
+    }
+  }
+
+  body {
+    @apply bg-background text-foreground;
+    font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
+    margin: 0;
+    line-height: 1.6;
+  }
+}
+
+@layer components {
+  /* 响应式容器 - 全屏宽度 */
+  .container {
+    @apply mx-auto px-3 sm:px-4 lg:px-6 xl:px-8;
+    max-width: 100%;
+  }
+
+  /* Stat pill - 放大 */
+  .stat-pill {
+    @apply flex items-center gap-2 px-3 py-1.5 rounded-md bg-muted/60 text-sm;
+  }
+
+  .stat-pill-value {
+    @apply font-mono font-semibold tabular-nums text-base;
+  }
+
+  /* Card - 放大 */
+  .card-compact {
+    @apply rounded-lg border bg-card shadow-sm;
+  }
+
+  .card-compact-header {
+    @apply flex items-center justify-between px-4 py-3 border-b bg-muted/30;
+  }
+
+  .card-compact-body {
+    @apply p-4;
+  }
+
+  /* Form field - 放大 */
+  .field-label {
+    @apply text-xs font-medium text-muted-foreground uppercase tracking-wide mb-1.5;
+  }
+
+  .field-input {
+    @apply h-10 text-sm px-3;
+  }
+
+  .field-input-mono {
+    @apply h-10 text-sm px-3 font-mono;
+  }
+
+  /* Live log styling - 放大 */
+  .log-line {
+    @apply flex items-center gap-3 py-1.5 px-2 text-sm font-mono rounded-md;
+    @apply hover:bg-muted/50 transition-colors;
+  }
+
+  .log-time {
+    @apply text-muted-foreground w-20 shrink-0 text-xs sm:text-sm;
+  }
+
+  .log-type {
+    @apply w-16 shrink-0 font-medium text-xs sm:text-sm;
+  }
+
+  .log-target {
+    @apply truncate text-xs sm:text-sm;
+  }
+
+  /* Type colors */
+  .type-host { @apply text-blue-600 dark:text-blue-400; }
+  .type-port { @apply text-emerald-600 dark:text-emerald-400; }
+  .type-service { @apply text-amber-600 dark:text-amber-400; }
+  .type-vuln { @apply text-red-600 dark:text-red-400; }
+
+  /* Badge - 放大 */
+  .badge {
+    @apply inline-flex items-center px-2 py-1 rounded-md text-xs font-medium uppercase tracking-wide;
+  }
+
+  .badge-host { @apply bg-blue-500/10 text-blue-600 dark:text-blue-400; }
+  .badge-port { @apply bg-emerald-500/10 text-emerald-600 dark:text-emerald-400; }
+  .badge-service { @apply bg-amber-500/10 text-amber-600 dark:text-amber-400; }
+  .badge-vuln { @apply bg-red-500/10 text-red-600 dark:text-red-400; }
+
+  /* Switch row - 放大 */
+  .switch-row {
+    @apply flex items-center justify-between py-2 px-3 rounded-md bg-muted/40 text-sm;
+  }
+
+  /* Scrollbar */
+  .scrollbar-thin {
+    scrollbar-width: thin;
+    scrollbar-color: hsl(var(--border)) transparent;
+  }
+
+  .scrollbar-thin::-webkit-scrollbar {
+    width: 6px;
+    height: 6px;
+  }
+
+  .scrollbar-thin::-webkit-scrollbar-track {
+    background: transparent;
+  }
+
+  .scrollbar-thin::-webkit-scrollbar-thumb {
+    background-color: hsl(var(--border));
+    border-radius: 3px;
+  }
+
+  /* Animations */
+  @keyframes fade-in {
+    from { opacity: 0; transform: translateY(-2px); }
+    to { opacity: 1; transform: translateY(0); }
+  }
+
+  .animate-fade-in {
+    animation: fade-in 0.15s ease-out;
+  }
+
+  @keyframes slide-up {
+    from { opacity: 0; transform: translateY(4px); }
+    to { opacity: 1; transform: translateY(0); }
+  }
+
+  .animate-slide-up {
+    animation: slide-up 0.2s ease-out;
+  }
+
+  @keyframes pulse-soft {
+    0%, 100% { opacity: 1; }
+    50% { opacity: 0.6; }
+  }
+
+  .animate-pulse-soft {
+    animation: pulse-soft 2s ease-in-out infinite;
+  }
+
+  /* Focus ring */
+  .focus-ring {
+    @apply focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 focus:ring-offset-background;
+  }
+
+  /* Hover lift effect */
+  .hover-lift {
+    @apply transition-transform hover:-translate-y-0.5;
+  }
+
+  /* Subtle shadow on hover */
+  .hover-shadow {
+    @apply transition-shadow hover:shadow-md;
+  }
+}
+
+@layer utilities {
+  .font-mono {
+    font-family: 'IBM Plex Mono', ui-monospace, monospace;
+  }
+}