feat: add content filter and code processing module (v0.3.0)

- Add content filter module (internal/content/)
- Implement basic character filtering (control chars, line breaks, symbols)
- Implement code block and inline code detection
- Implement comment detection for 30+ languages (JS/Python/Go/HTML/etc)
- Add go-enry dependency for intelligent language detection
- Add SkipKeywords config option (default: TODO/FIXME/HACK/XXX/etc)
- Integrate content processing into Translator
- Update config.yaml with skip_keywords

internal/translator/translator.go

@@ -6,22 +6,25 @@ import (
 	"time"
 
 	"github.com/titor/fanyi/internal/config"
+	"github.com/titor/fanyi/internal/content"
 	"github.com/titor/fanyi/internal/provider"
 )
 
 // Translator 核心翻译类
 type Translator struct {
-	config   *config.Config
-	provider provider.Provider
-	prompt   *PromptManager
+	config        *config.Config
+	provider      provider.Provider
+	prompt        *PromptManager
+	contentParser *content.Parser
 }
 
 // NewTranslator 创建翻译器实例
 func NewTranslator(config *config.Config, provider provider.Provider) *Translator {
 	return &Translator{
-		config:   config,
-		provider: provider,
-		prompt:   NewPromptManager(config.Prompts),
+		config:        config,
+		provider:      provider,
+		prompt:        NewPromptManager(config.Prompts),
+		contentParser: content.NewParser(config.SkipKeywords),
 	}
 }
 
@@ -31,15 +34,33 @@ func (t *Translator) Translate(ctx context.Context, text string, options *Transl
 	timeoutCtx, cancel := context.WithTimeout(ctx, time.Duration(t.config.Timeout)*time.Second)
 	defer cancel()
 
+	// 基础字符过滤
+	filteredText := content.FilterBasic(text, nil)
+
+	// 内容解析（包含代码检测）
+	parseResult, parseErr := t.contentParser.Parse(filteredText)
+
 	// 选择Prompt
 	prompt := ""
 	if options.PromptName != "" {
 		prompt = t.prompt.GetPrompt(options.PromptName)
 	}
 
+	// 如果包含代码且解析成功，使用增强的Prompt
+	if parseErr == nil && parseResult.HasCode {
+		enhancedPrompt := t.contentParser.BuildPrompt(parseResult)
+		if enhancedPrompt != "" {
+			if prompt != "" {
+				prompt = prompt + "\n\n" + enhancedPrompt
+			} else {
+				prompt = enhancedPrompt
+			}
+		}
+	}
+
 	// 构建请求
 	req := &provider.TranslateRequest{
-		Text:     text,
+		Text:     filteredText,
 		FromLang: options.FromLang,
 		ToLang:   options.ToLang,
 		Prompt:   prompt,
@@ -53,10 +74,17 @@ func (t *Translator) Translate(ctx context.Context, text string, options *Transl
 		return nil, fmt.Errorf("翻译失败: %w", err)
 	}
 
+	translatedText := resp.Text
+
+	// 如果包含代码且解析成功，重构结果
+	if parseErr == nil && parseResult.HasCode {
+		translatedText = t.contentParser.Reconstruct(parseResult, resp.Text)
+	}
+
 	// 构建结果
 	return &TranslateResult{
 		Original:   text,
-		Translated: resp.Text,
+		Translated: translatedText,
 		FromLang:   resp.FromLang,
 		ToLang:     resp.ToLang,
 		Model:      resp.Model,