feat(auth): 添加认证模块和图片批注功能（项目初始化）

- 实现用户登录、登出、密码修改等认证功能
- 添加会话管理和权限控制中间件
- 创建图片批注组件和相关API路由
- 实现批注的增删改查功能
- 添加Docker和Git忽略配置文件
- 创建系统架构文档和开发约定说明
- 集成认证模块到前端应用路由中

tailwind.config.js

@@ -0,0 +1,71 @@
+/** @type {import('tailwindcss').Config} */
+
+export default {
+  darkMode: "class",
+  content: ["./index.html", "./src/**/*.{js,ts,jsx,tsx}"],
+  theme: {
+    container: {
+      center: true,
+    },
+    extend: {
+      colors: {
+        paper: "#F5F1EA",      // 米白纸张
+        ink: "#1A1A1A",         // 墨黑
+        ochre: "#B8412E",       // 赭石红
+        sage: "#5C6B5A",        // 鼠尾草绿
+        cream: "#FBF8F2",       // 奶白
+        stone: {
+          50: "#FAF7F2",
+          100: "#F0EBE0",
+          200: "#E2DACA",
+          300: "#C9BCA3",
+          400: "#A8997A",
+          500: "#857558",
+          600: "#65573E",
+          700: "#4A3F2C",
+          800: "#2E2619",
+          900: "#1A150E",
+        },
+      },
+      fontFamily: {
+        display: ['Fraunces', 'Georgia', 'serif'],
+        body: ['Inter', 'system-ui', 'sans-serif'],
+        mono: ['JetBrains Mono', 'ui-monospace', 'monospace'],
+      },
+      letterSpacing: {
+        'tightest': '-0.04em',
+        'tighter-2': '-0.06em',
+      },
+      animation: {
+        'fade-up': 'fadeUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) both',
+        'fade-in': 'fadeIn 0.6s ease-out both',
+        'pulse-soft': 'pulseSoft 2.4s ease-in-out infinite',
+        'scale-in': 'scaleIn 0.4s cubic-bezier(0.2, 0.8, 0.2, 1) both',
+        'draw-line': 'drawLine 1s ease-out both',
+      },
+      keyframes: {
+        fadeUp: {
+          '0%': { opacity: '0', transform: 'translateY(16px)' },
+          '100%': { opacity: '1', transform: 'translateY(0)' },
+        },
+        fadeIn: {
+          '0%': { opacity: '0' },
+          '100%': { opacity: '1' },
+        },
+        pulseSoft: {
+          '0%, 100%': { transform: 'scale(1)', opacity: '1' },
+          '50%': { transform: 'scale(1.12)', opacity: '0.85' },
+        },
+        scaleIn: {
+          '0%': { opacity: '0', transform: 'scale(0.9)' },
+          '100%': { opacity: '1', transform: 'scale(1)' },
+        },
+        drawLine: {
+          '0%': { transform: 'scaleX(0)' },
+          '100%': { transform: 'scaleX(1)' },
+        },
+      },
+    },
+  },
+  plugins: [],
+};