feat(translation): enhance translation system and add metadata tracking

- Update translation logic for improved results
- Implement metadata tracking (total calls, last used time, model usage, prompt examples, token usage)
- Add retry logic for failed translations
- Improve translation validation
- Upgrade Anthropic client to new beta version with prompt caching
- Update go-anthropic library to v2.6.0

cmd/translate.go

@@ -95,7 +95,7 @@ func runTranslate(cmd *cobra.Command, args []string) error {
 	anthropicTranslator, err := translator.GetAnthropicTranslator(&translator.Config{
 		APIKey:      os.Getenv("ANTHROPIC_KEY"),
 		Model:       cmd.Flag("model").Value.String(),
-		Temperature: 0.3,
+		Temperature: 0.7,
 		MaxTokens:   4096,
 	})
 	if err != nil {

pkg/processor/processor.go

@@ -105,7 +105,7 @@ func worker(ctx context.Context, jobs <-chan string, results chan<- error, proce
 	}
 }
 
-var excludeRegex = regexp.MustCompile(`(?i)(preface|introduction|foreword|prologue|toc|table\s*of\s*contents|title|cover|copyright|colophon|dedication|acknowledgements?|about\s*the\s*author|bibliography|glossary|index|appendix|notes?|footnotes?|endnotes?|references|epub-meta|metadata|nav|ncx|opf|front\s*matter|back\s*matter|halftitle|frontispiece|epigraph|list\s*of\s*(figures|tables|illustrations)|copyright\s*page|series\s*page|reviews|praise\s*for|also\s*by\s*the\s*author|author\s*bio|publication\s*info|imprint|credits|permissions|disclaimer|errata|synopsis|summary)`)
+var excludeRegex = regexp.MustCompile(`(?i)(preface|introduction|foreword|prologue|toc|table\s*of\s*contents|title|cover|copyright|colophon|dedication|acknowledgements?|about\s*the\s*author|bibliography|glossary|index|appendix|notes?|footnotes?|endnotes?|references|epub-meta|metadata|nav|ncx|opf|front\s*matter|back\s*matter|halftitle|frontispiece|epigraph|list\s*of\s*(figures|tables|illustrations)|copyright\s*page|series\s*page|reviews|praise|also\s*by\s*the\s*author|author\s*bio|publication\s*info|imprint|credits|permissions|disclaimer|errata|synopsis|summary)`)
 
 // ShouldExcludeFile determines if a file should be excluded based on its name
 func ShouldExcludeFile(fileName string) bool {

pkg/translator/anthropic.go

@@ -134,7 +134,8 @@ type Anthropic struct {
 func createTranslationSystem(source, target string) string {
 	return fmt.Sprintf(`Translation guidelines:
 - Preserve HTML structure
-- Writing style: Clear, concise, professional, technical, Use %[2]s flexibly, fluently and softly Use active voice and maintain logical flow.
+- Writing style: Clear, concise, professional, technical, Use %[2]s flexibly, fluently and softly.
+- Use active voice and maintain logical flow.
 - Translation approach: 
   • Translate for meaning, not word-for-word
   • Adapt idioms and cultural references to %[2]s equivalents