refactor(translator, executor): remove redundant bytes.Clone calls for improved performance

- Replaced all instances of `bytes.Clone` with direct references to enhance efficiency.
- Simplified payload handling across executors and translators by eliminating unnecessary data duplication.

internal/translator/gemini/claude/gemini_claude_request.go

@@ -28,7 +28,7 @@ const geminiClaudeThoughtSignature = "skip_thought_signature_validator"
 // Returns:
 //   - []byte: The transformed request in Gemini CLI format.
 func ConvertClaudeRequestToGemini(modelName string, inputRawJSON []byte, _ bool) []byte {
-	rawJSON := bytes.Clone(inputRawJSON)
+	rawJSON := inputRawJSON
 	rawJSON = bytes.Replace(rawJSON, []byte(`"url":{"type":"string","format":"uri",`), []byte(`"url":{"type":"string",`), -1)
 
 	// Build output Gemini CLI request JSON

internal/translator/gemini/gemini-cli/gemini_gemini-cli_request.go

@@ -6,7 +6,6 @@
 package geminiCLI
 
 import (
-	"bytes"
 	"fmt"
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/translator/gemini/common"
@@ -19,7 +18,7 @@ import (
 // It extracts the model name, system instruction, message contents, and tool declarations
 // from the raw JSON request and returns them in the format expected by the internal client.
 func ConvertGeminiCLIRequestToGemini(_ string, inputRawJSON []byte, _ bool) []byte {
-	rawJSON := bytes.Clone(inputRawJSON)
+	rawJSON := inputRawJSON
 	modelResult := gjson.GetBytes(rawJSON, "model")
 	rawJSON = []byte(gjson.GetBytes(rawJSON, "request").Raw)
 	rawJSON, _ = sjson.SetBytes(rawJSON, "model", modelResult.String())

internal/translator/gemini/gemini/gemini_gemini_request.go

@@ -4,7 +4,6 @@
 package gemini
 
 import (
-	"bytes"
 	"fmt"
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/translator/gemini/common"
@@ -19,7 +18,7 @@ import (
 //
 // It keeps the payload otherwise unchanged.
 func ConvertGeminiRequestToGemini(_ string, inputRawJSON []byte, _ bool) []byte {
-	rawJSON := bytes.Clone(inputRawJSON)
+	rawJSON := inputRawJSON
 	// Fast path: if no contents field, only attach safety settings
 	contents := gjson.GetBytes(rawJSON, "contents")
 	if !contents.Exists() {

internal/translator/gemini/openai/chat-completions/gemini_openai_request.go

@@ -3,7 +3,6 @@
 package chat_completions
 
 import (
-	"bytes"
 	"fmt"
 	"strings"
 
@@ -28,7 +27,7 @@ const geminiFunctionThoughtSignature = "skip_thought_signature_validator"
 // Returns:
 //   - []byte: The transformed request data in Gemini API format
 func ConvertOpenAIRequestToGemini(modelName string, inputRawJSON []byte, _ bool) []byte {
-	rawJSON := bytes.Clone(inputRawJSON)
+	rawJSON := inputRawJSON
 	// Base envelope (no default thinkingConfig)
 	out := []byte(`{"contents":[]}`)
 

internal/translator/gemini/openai/responses/gemini_openai-responses_request.go

@@ -1,7 +1,6 @@
 package responses
 
 import (
-	"bytes"
 	"strings"
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/translator/gemini/common"
@@ -12,7 +11,7 @@ import (
 const geminiResponsesThoughtSignature = "skip_thought_signature_validator"
 
 func ConvertOpenAIResponsesRequestToGemini(modelName string, inputRawJSON []byte, stream bool) []byte {
-	rawJSON := bytes.Clone(inputRawJSON)
+	rawJSON := inputRawJSON
 
 	// Note: modelName and stream parameters are part of the fixed method signature
 	_ = modelName // Unused but required by interface