feat(system-logs): enhance ANSI log viewer with log level colorization

- Add LOG_LEVEL_COLORS configuration mapping for DEBUG, INFO, WARNING, WARN, ERROR, and CRITICAL levels
- Implement hasAnsiCodes() function to detect presence of ANSI escape sequences in log content
- Add colorizeLogContent() function to parse plain text logs and apply color styling based on log levels
- Support dual-mode log parsing: ANSI color codes and plain text log level detection
- Rename converter to ansiConverter for clarity and consistency
- Change newline handling from true to false for manual line break control
- Apply color-coded styling to timestamps (gray), log levels (level-specific colors), and messages
- Add bold font-weight styling for CRITICAL level logs for better visibility

frontend/components/settings/system-logs/ansi-log-viewer.tsx

@@ -8,11 +8,21 @@ interface AnsiLogViewerProps {
   className?: string
 }
 
+// 日志级别颜色配置
+const LOG_LEVEL_COLORS: Record<string, string> = {
+  DEBUG: "#4ec9b0",    // cyan
+  INFO: "#6a9955",     // green
+  WARNING: "#dcdcaa",  // yellow
+  WARN: "#dcdcaa",     // yellow
+  ERROR: "#f44747",    // red
+  CRITICAL: "#f44747", // red (bold handled separately)
+}
+
 // 创建 ANSI 转换器实例
-const converter = new AnsiToHtml({
+const ansiConverter = new AnsiToHtml({
   fg: "#d4d4d4",
   bg: "#1e1e1e",
-  newline: true,
+  newline: false,  // 我们自己处理换行
   escapeXML: true,
   colors: {
     0: "#1e1e1e",   // black
@@ -34,14 +44,57 @@ const converter = new AnsiToHtml({
   },
 })
 
+// 检测内容是否包含 ANSI 颜色码
+function hasAnsiCodes(text: string): boolean {
+  // ANSI 转义序列通常以 ESC[ 开头（\x1b[ 或 \u001b[）
+  return /\x1b\[|\u001b\[/.test(text)
+}
+
+// 解析纯文本日志内容，为日志级别添加颜色
+function colorizeLogContent(content: string): string {
+  // 匹配日志格式: [时间] [级别] [模块:行号] 消息
+  // 例如: [2025-01-05 10:30:00] [INFO] [apps.scan:123] 消息内容
+  const logLineRegex = /^(\[\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\]) (\[(DEBUG|INFO|WARNING|WARN|ERROR|CRITICAL)\]) (.*)$/
+  
+  return content
+    .split("\n")
+    .map((line) => {
+      const match = line.match(logLineRegex)
+      
+      if (match) {
+        const [, timestamp, levelBracket, level, rest] = match
+        const color = LOG_LEVEL_COLORS[level] || "#d4d4d4"
+        // ansiConverter.toHtml 已经处理了 HTML 转义
+        const escapedTimestamp = ansiConverter.toHtml(timestamp)
+        const escapedLevelBracket = ansiConverter.toHtml(levelBracket)
+        const escapedRest = ansiConverter.toHtml(rest)
+        
+        // 时间戳灰色，日志级别带颜色，其余默认色
+        return `<span style="color:#808080">${escapedTimestamp}</span> <span style="color:${color};font-weight:${level === "CRITICAL" ? "bold" : "normal"}">${escapedLevelBracket}</span> ${escapedRest}`
+      }
+      
+      // 非标准格式的行，也进行 HTML 转义
+      return ansiConverter.toHtml(line)
+    })
+    .join("\n")
+}
+
 export function AnsiLogViewer({ content, className }: AnsiLogViewerProps) {
   const containerRef = useRef<HTMLPreElement>(null)
   const isAtBottomRef = useRef(true)  // 跟踪用户是否在底部
 
-  // 将 ANSI 转换为 HTML
+  // 解析日志并添加颜色
+  // 支持两种模式：ANSI 颜色码和纯文本日志级别解析
   const htmlContent = useMemo(() => {
     if (!content) return ""
-    return converter.toHtml(content)
+    
+    // 如果包含 ANSI 颜色码，直接转换
+    if (hasAnsiCodes(content)) {
+      return ansiConverter.toHtml(content)
+    }
+    
+    // 否则解析日志级别添加颜色
+    return colorizeLogContent(content)
   }, [content])
 
   // 监听滚动事件，检测用户是否在底部