refactor(amp): consolidate and simplify model mapping debug logs

internal/api/modules/amp/fallback_handlers.go

@@ -180,6 +180,7 @@ func (fh *FallbackHandler) WrapHandler(handler gin.HandlerFunc) gin.HandlerFunc
 
 		if usedMapping {
 			// Log: Model was mapped to another model
+			log.Debugf("amp model mapping: request %s -> %s", normalizedModel, resolvedModel)
 			logAmpRouting(RouteTypeModelMapping, modelName, resolvedModel, providerName, requestPath)
 			rewriter := NewResponseRewriter(c.Writer, normalizedModel)
 			c.Writer = rewriter
@@ -188,7 +189,7 @@ func (fh *FallbackHandler) WrapHandler(handler gin.HandlerFunc) gin.HandlerFunc
 			c.Request.Body = io.NopCloser(bytes.NewReader(bodyBytes))
 			handler(c)
 			rewriter.Flush()
-			log.Debugf("amp response rewriter: rewrote model %s -> %s in response", resolvedModel, normalizedModel)
+			log.Debugf("amp model mapping: response %s -> %s", resolvedModel, normalizedModel)
 		} else if len(providers) > 0 {
 			// Log: Using local provider (free)
 			logAmpRouting(RouteTypeLocalProvider, modelName, resolvedModel, providerName, requestPath)

internal/api/modules/amp/model_mapping.go

@@ -66,7 +66,6 @@ func (m *DefaultModelMapper) MapModel(requestedModel string) string {
 	}
 
 	// Note: Detailed routing log is handled by logAmpRouting in fallback_handlers.go
-	log.Debugf("amp model mapping: resolved %s -> %s", requestedModel, targetModel)
 	return targetModel
 }
 

internal/api/modules/amp/response_rewriter.go

@@ -1,9 +1,7 @@
 package amp
 
 import (
-	"bufio"
 	"bytes"
-	"net"
 	"net/http"
 	"strings"
 
@@ -98,11 +96,3 @@ func (rw *ResponseRewriter) rewriteStreamChunk(chunk []byte) []byte {
 
 	return bytes.Join(lines, []byte("\n"))
 }
-
-// Hijack implements http.Hijacker for WebSocket support
-func (rw *ResponseRewriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
-	if hijacker, ok := rw.ResponseWriter.(http.Hijacker); ok {
-		return hijacker.Hijack()
-	}
-	return nil, nil, http.ErrNotSupported
-}