fix: 完善工具名改写测试和格式

backend/internal/pkg/tlsfingerprint/dialer_capture_test.go

@@ -15,8 +15,8 @@ import (
 	utls "github.com/refraction-networking/utls"
 )
 
-// CapturedFingerprint mirrors the Fingerprint struct from tls-fingerprint-web.
+// CapturedFingerprint 对应 tls-fingerprint-web 返回的 Fingerprint 结构。
-// Used to deserialize the JSON response from the capture server.
+// 用于反序列化 capture server 的 JSON 响应。
 type CapturedFingerprint struct {
 	JA3Raw              string   `json:"ja3_raw"`
 	JA3Hash             string   `json:"ja3_hash"`
@@ -35,17 +35,17 @@ type CapturedFingerprint struct {
 	EnableGREASE        bool     `json:"enable_grease"`
 }
 
-// TestDialerAgainstCaptureServer connects to the tls-fingerprint-web capture server
+// TestDialerAgainstCaptureServer 连接 tls-fingerprint-web capture server，
-// and verifies that the dialer's TLS fingerprint matches the configured Profile.
+// 验证 Dialer 的 TLS 指纹是否匹配配置的 Profile。
 //
-// Default capture server: https://tls.sub2api.org:8090
+// 该测试依赖外部服务，默认跳过。需要手动验证时设置：
-// Override with env: TLSFINGERPRINT_CAPTURE_URL=https://localhost:8443
+// TLSFINGERPRINT_CAPTURE_URL=https://localhost:8443
 //
-// Run: go test -v -run TestDialerAgainstCaptureServer ./internal/pkg/tlsfingerprint/...
+// 运行方式：go test -tags=integration -v -run TestDialerAgainstCaptureServer ./internal/pkg/tlsfingerprint/...
 func TestDialerAgainstCaptureServer(t *testing.T) {
-	captureURL := os.Getenv("TLSFINGERPRINT_CAPTURE_URL")
+	captureURL := strings.TrimSpace(os.Getenv("TLSFINGERPRINT_CAPTURE_URL"))
 	if captureURL == "" {
-		captureURL = "https://tls.sub2api.org:8090"
+		t.Skip("跳过外部 TLS 指纹 capture 测试：未设置 TLSFINGERPRINT_CAPTURE_URL")
 	}
 
 	tests := []struct {
@@ -57,7 +57,7 @@ func TestDialerAgainstCaptureServer(t *testing.T) {
 			profile: &Profile{
 				Name:         "default",
 				EnableGREASE: false,
-				// All empty → uses built-in defaults
+				// 全部留空时使用内置默认值
 			},
 		},
 		{
@@ -104,7 +104,7 @@ func TestDialerAgainstCaptureServer(t *testing.T) {
 			t.Logf("JA3 Hash: %s", captured.JA3Hash)
 			t.Logf("JA4:      %s", captured.JA4)
 
-			// Resolve effective profile values (what the dialer actually uses)
+			// 解析实际生效的 Profile 值，也就是 Dialer 最终使用的值。
 			effectiveCipherSuites := tc.profile.CipherSuites
 			if len(effectiveCipherSuites) == 0 {
 				effectiveCipherSuites = defaultCipherSuites
@@ -144,7 +144,7 @@ func TestDialerAgainstCaptureServer(t *testing.T) {
 				effectivePSKModes = []uint16{1} // psk_dhe_ke
 			}
 
-			// Verify each field
+			// 校验每个指纹字段
 			assertIntSliceEqual(t, "cipher_suites", uint16sToInts(effectiveCipherSuites), captured.CipherSuites)
 			assertIntSliceEqual(t, "curves", uint16sToInts(effectiveCurves), captured.Curves)
 			assertIntSliceEqual(t, "point_formats", uint16sToInts(effectivePointFormats), captured.PointFormats)
@@ -160,13 +160,13 @@ func TestDialerAgainstCaptureServer(t *testing.T) {
 				t.Logf("  enable_grease: %v OK", captured.EnableGREASE)
 			}
 
-			// Verify extension order
+			// 校验扩展顺序；如果 Profile 显式配置了 Extensions 就使用配置值，
-			// Use profile.Extensions if set, otherwise the default order (Node.js 24.x)
+			// 否则使用默认顺序（Node.js 24.x）。
 			expectedExtOrder := uint16sToInts(defaultExtensionOrder)
 			if len(tc.profile.Extensions) > 0 {
 				expectedExtOrder = uint16sToInts(tc.profile.Extensions)
 			}
-			// Strip GREASE values from both expected and captured for comparison
+			// 比较前从期望值和采集值中剔除 GREASE。
 			var filteredExpected, filteredActual []int
 			for _, e := range expectedExtOrder {
 				if !isGREASEValue(uint16(e)) {
@@ -180,7 +180,7 @@ func TestDialerAgainstCaptureServer(t *testing.T) {
 			}
 			assertIntSliceEqual(t, "extensions (order, non-GREASE)", filteredExpected, filteredActual)
 
-			// Print full captured data as JSON for debugging
+			// 打印完整采集结果，便于排查指纹差异。
 			capturedJSON, _ := json.MarshalIndent(captured, "  ", "  ")
 			t.Logf("Full captured fingerprint:\n  %s", string(capturedJSON))
 		})

backend/internal/service/gateway_tool_rewrite.go

@@ -169,10 +169,10 @@ func buildToolNameRewriteFromBody(body []byte) *ToolNameRewrite {
 
 // applyToolNameRewriteToBody 把已构造的 ToolNameRewrite 应用到 body 上：
 //
-//	- 改写 $.tools[*].name（仅对 shouldMimicToolName 通过的 tool）
+//   - 改写 $.tools[*].name（仅对 shouldMimicToolName 通过的 tool）
-//	- 改写 $.tool_choice.name（仅当 $.tool_choice.type == "tool"）
+//   - 改写 $.tool_choice.name（仅当 $.tool_choice.type == "tool"）
-//	- 改写 $.messages[*].content[*].name（仅当 type == "tool_use"）
+//   - 改写 $.messages[*].content[*].name（仅当 type == "tool_use"）
-//	- 在 $.tools[last].cache_control 上打 ephemeral 缓存断点
+//   - 在 $.tools[last].cache_control 上打 ephemeral 缓存断点
 //
 // 响应侧 bytes.Replace 会连带还原假名 → 真名。
 func applyToolNameRewriteToBody(body []byte, rw *ToolNameRewrite) []byte {
@@ -213,9 +213,8 @@ func applyToolNameRewriteToBody(body []byte, rw *ToolNameRewrite) []byte {
 		}
 	}
 
-	// Rewrite tool_use names in messages to match the renamed tools.
+	// 同步改写历史消息中的 tool_use.name，确保它和 tools[] 中的假名一致。
-	// Without this, Anthropic rejects requests where messages reference tools
+	// 否则 Anthropic 会因为 tool_use 引用了未声明的原始工具名而拒绝请求。
-	// by their original name but tools[] declares the renamed (fake) name.
 	messages := gjson.GetBytes(body, "messages")
 	if messages.IsArray() {
 		messages.ForEach(func(msgKey, msg gjson.Result) bool {

backend/internal/service/gateway_tool_rewrite_test.go

@@ -69,26 +69,25 @@ func TestApplyToolNameRewriteToBody_RenamesToolsAndToolChoice(t *testing.T) {
 	require.NotNil(t, rw)
 	require.Contains(t, rw.Forward, "sessions_list")
 	require.Contains(t, rw.Forward, "session_get")
-	// web_search is a server tool, not rewritten
+	// web_search 是 server tool，不参与工具名改写
 	require.NotContains(t, rw.Forward, "web_search")
 
 	out := applyToolNameRewriteToBody(body, rw)
 
-	// tools[0].name and tools[1].name rewritten; tools[2].name untouched
+	// tools[0].name 和 tools[1].name 被改写，tools[2].name 保持不变
 	require.Equal(t, "cc_sess_list", gjson.GetBytes(out, "tools.0.name").String())
 	require.Equal(t, "cc_ses_get", gjson.GetBytes(out, "tools.1.name").String())
 	require.Equal(t, "web_search", gjson.GetBytes(out, "tools.2.name").String())
 
-	// tool_choice.name rewritten
+	// tool_choice.name 被同步改写
 	require.Equal(t, "cc_sess_list", gjson.GetBytes(out, "tool_choice.name").String())
 	require.Equal(t, "tool", gjson.GetBytes(out, "tool_choice.type").String())
 }
 
-
 func TestApplyToolNameRewriteToBody_RenamesToolUseInMessages(t *testing.T) {
-	// sessions_list -> cc_sess_list (static prefix: sessions_ -> sessions_)
+	// sessions_list 通过静态前缀规则改写为 cc_sess_list
-	// web_search is a server tool (type != ""), not rewritten
+	// web_search 是 server tool（type != ""），不参与工具名改写
-	// messages tool_use names must be rewritten to match tools[]
+	// messages 中的 tool_use.name 必须同步改写，才能和 tools[] 保持一致
 	body := []byte(`{"tools":[{"name":"sessions_list","input_schema":{}},{"name":"web_search","type":"web_search_20250305"}],"messages":[{"role":"user","content":[{"type":"text","text":"hi"}]},{"role":"assistant","content":[{"type":"tool_use","id":"tu_01","name":"sessions_list","input":{}},{"type":"text","text":"thinking"}]},{"role":"user","content":[{"type":"tool_result","tool_use_id":"tu_01","content":"ok"}]}]}`)
 	rw := buildToolNameRewriteFromBody(body)
 	require.NotNil(t, rw)
@@ -96,18 +95,42 @@ func TestApplyToolNameRewriteToBody_RenamesToolUseInMessages(t *testing.T) {
 
 	out := applyToolNameRewriteToBody(body, rw)
 
-	// tools[0].name rewritten
+	// tools[0].name 被改写
 	require.Equal(t, "cc_sess_list", gjson.GetBytes(out, "tools.0.name").String())
-	// tools[1].name untouched (server tool)
+	// tools[1].name 是 server tool，保持不变
 	require.Equal(t, "web_search", gjson.GetBytes(out, "tools.1.name").String())
-	// messages[1].content[0].name (tool_use) also rewritten to match tools
+	// messages[1].content[0].name 是 tool_use，必须同步改写以匹配 tools[]
 	require.Equal(t, "cc_sess_list", gjson.GetBytes(out, "messages.1.content.0.name").String())
-	// messages[1].content[1] (text) untouched
+	// messages[1].content[1] 是 text，保持不变
 	require.Equal(t, "thinking", gjson.GetBytes(out, "messages.1.content.1.text").String())
-	// messages[2].content[0] (tool_result) untouched — no name field in tool_result
+	// messages[2].content[0] 是 tool_result，不包含 name 字段，保持不变
 	require.Equal(t, "ok", gjson.GetBytes(out, "messages.2.content.0.content").String())
 }
 
+func TestApplyToolNameRewriteToBody_RenamesToolUseWithDynamicMapping(t *testing.T) {
+	body := []byte(`{"tools":[{"name":"alpha_search","input_schema":{}},{"name":"beta_lookup","input_schema":{}},{"name":"gamma_fetch","input_schema":{}},{"name":"delta_update","input_schema":{}},{"name":"epsilon_parse","input_schema":{}},{"name":"zeta_render","input_schema":{}},{"name":"web_search","type":"web_search_20250305"}],"tool_choice":{"type":"tool","name":"gamma_fetch"},"messages":[{"role":"assistant","content":[{"type":"tool_use","id":"tu_dyn","name":"gamma_fetch","input":{}},{"type":"tool_use","id":"tu_srv","name":"web_search","input":{}},{"type":"text","text":"done"}]},{"role":"user","content":[{"type":"tool_result","tool_use_id":"tu_dyn","content":"ok"}]}]}`)
+	rw := buildToolNameRewriteFromBody(body)
+	require.NotNil(t, rw)
+	require.Len(t, rw.Forward, 6)
+
+	fakeGamma := rw.Forward["gamma_fetch"]
+	require.NotEmpty(t, fakeGamma)
+	require.NotEqual(t, "gamma_fetch", fakeGamma)
+	require.NotContains(t, rw.Forward, "web_search")
+
+	out := applyToolNameRewriteToBody(body, rw)
+
+	// 动态映射会改写 tools[]、tool_choice 和历史 tool_use 中的同一个工具名
+	require.Equal(t, fakeGamma, gjson.GetBytes(out, "tools.2.name").String())
+	require.Equal(t, fakeGamma, gjson.GetBytes(out, "tool_choice.name").String())
+	require.Equal(t, fakeGamma, gjson.GetBytes(out, "messages.0.content.0.name").String())
+	// server tool 不参与动态映射，历史 tool_use 中同名引用也保持不变
+	require.Equal(t, "web_search", gjson.GetBytes(out, "tools.6.name").String())
+	require.Equal(t, "web_search", gjson.GetBytes(out, "messages.0.content.1.name").String())
+	// tool_result 依靠 tool_use_id 关联，不需要 name 字段
+	require.Equal(t, "ok", gjson.GetBytes(out, "messages.1.content.0.content").String())
+}
+
 func TestApplyToolsLastCacheBreakpoint_InjectsDefault(t *testing.T) {
 	body := []byte(`{"tools":[{"name":"a","input_schema":{}},{"name":"b","input_schema":{}}]}`)
 	out := applyToolsLastCacheBreakpoint(body)