docs(website): 添加简记memo产品原型和UI设计规范文档

- 新增「简记memo」一体化小程序产品原型设计文档
- 新增简记memo完整版UI视觉设计规范和界面细节
- 添加IDEA项目配置文件.gitignore
- 创建404页面HTML文件，包含响应式布局和错误提示
- 添加关于页面HTML文件，展示品牌介绍和团队信息
- 实现AES加解密工具函数，支持请求体加密
- 添加用户协议页面基础框架

utils/sensitive.go

@@ -0,0 +1,110 @@
+// utils/sensitive.go
+// 敏感词过滤工具
+package utils
+
+import (
+	"embed"
+	"strings"
+	"sync"
+
+	"github.com/importcjj/sensitive"
+)
+
+//go:embed sensitive_words.txt
+var sensitiveWordsFS embed.FS
+
+var (
+	filter     *sensitive.Filter
+	filterOnce sync.Once
+)
+
+// GetSensitiveFilter 获取敏感词过滤器单例
+func GetSensitiveFilter() *sensitive.Filter {
+	filterOnce.Do(func() {
+		filter = sensitive.New()
+		loadDefaultWords()
+	})
+	return filter
+}
+
+// loadDefaultWords 加载默认敏感词库
+func loadDefaultWords() {
+	// 从嵌入的文件系统读取
+	data, err := sensitiveWordsFS.ReadFile("sensitive_words.txt")
+	if err != nil {
+		// 如果文件不存在，使用内置的基础词库
+		loadBuiltinWords()
+		return
+	}
+
+	words := strings.Split(string(data), "\n")
+	for _, word := range words {
+		word = strings.TrimSpace(word)
+		if word != "" && !strings.HasPrefix(word, "#") {
+			filter.AddWord(word)
+		}
+	}
+}
+
+// loadBuiltinWords 加载内置基础敏感词
+func loadBuiltinWords() {
+	// 基硎敏感词列表
+	builtinWords := []string{
+		// 政治相关
+		"习近平", "江泽民", "胡锦涛", "温家宝", "李克强",
+		"法轮功", "六四", "天安门", "台独", "藏独", "疆独",
+		// 色情相关
+		"色情", "黄色", "裸体", "做爱", "性交", "强奸", "乱伦",
+		// 暴力相关
+		"杀人", "自杀", "爆炸", "恐怖", "炸弹", "袭击",
+		// 赌博相关
+		"赌博", "赌钱", "博彩", "六合彩",
+		// 毒品相关
+		"毒品", "吸毒", "贩毒", "冰毒", "海洛因",
+		// 侮辱性词汇
+		"傻逼", "操你", "妈的", "王八蛋", "畜生",
+	}
+
+	for _, word := range builtinWords {
+		filter.AddWord(word)
+	}
+}
+
+// FilterSensitive 过滤敏感词，替换为 *
+func FilterSensitive(text string) string {
+	f := GetSensitiveFilter()
+	return f.Replace(text, '*')
+}
+
+// ContainsSensitive 检查是否包含敏感词
+func ContainsSensitive(text string) bool {
+	f := GetSensitiveFilter()
+	has, _ := f.FindIn(text)
+	return has
+}
+
+// FindAllSensitive 查找所有敏感词
+func FindAllSensitive(text string) []string {
+	f := GetSensitiveFilter()
+	return f.FindAll(text)
+}
+
+// ValidateContent 验证内容，返回是否通过和第一个敏感词
+func ValidateContent(text string) (bool, string) {
+	f := GetSensitiveFilter()
+	return f.Validate(text)
+}
+
+// AddSensitiveWord 动态添加敏感词
+func AddSensitiveWord(word string) {
+	f := GetSensitiveFilter()
+	f.AddWord(word)
+}
+
+// AddSensitiveWords 批量添加敏感词
+func AddSensitiveWords(words []string) {
+	f := GetSensitiveFilter()
+	for _, word := range words {
+		f.AddWord(word)
+	}
+}