fix: resolve remaining test failures after v0.1.112 merge

- Add missing balanceNotifyService param to NewGatewayService in warmup test
- Fix config_test YAML path escaping on Windows (use filepath.ToSlash)
- Update pricingRequestToService test: empty platform no longer defaults

backend/internal/config/config_test.go

@@ -233,12 +233,13 @@ func TestLoadForcedCodexInstructionsTemplate(t *testing.T) {
 	configPath := filepath.Join(tempDir, "config.yaml")
 
 	require.NoError(t, os.WriteFile(templatePath, []byte("server-prefix\n\n{{ .ExistingInstructions }}"), 0o644))
-	require.NoError(t, os.WriteFile(configPath, []byte("gateway:\n  forced_codex_instructions_template_file: \""+templatePath+"\"\n"), 0o644))
+	yamlSafePath := filepath.ToSlash(templatePath)
+	require.NoError(t, os.WriteFile(configPath, []byte("gateway:\n  forced_codex_instructions_template_file: \""+yamlSafePath+"\"\n"), 0o644))
 	t.Setenv("DATA_DIR", tempDir)
 
 	cfg, err := Load()
 	require.NoError(t, err)
-	require.Equal(t, templatePath, cfg.Gateway.ForcedCodexInstructionsTemplateFile)
+	require.Equal(t, yamlSafePath, cfg.Gateway.ForcedCodexInstructionsTemplateFile)
 	require.Equal(t, "server-prefix\n\n{{ .ExistingInstructions }}", cfg.Gateway.ForcedCodexInstructionsTemplate)
 }
 

backend/internal/handler/admin/channel_handler_test.go

@@ -273,13 +273,13 @@ func TestPricingRequestToService_Defaults(t *testing.T) {
 			wantValue: string(service.BillingModeToken),
 		},
 		{
-			name: "empty platform defaults to anthropic",
+			name: "empty platform stays empty",
 			req: channelModelPricingRequest{
 				Models:   []string{"m1"},
 				Platform: "",
 			},
 			wantField: "Platform",
-			wantValue: "anthropic",
+			wantValue: "",
 		},
 	}
 

backend/internal/handler/gateway_handler_warmup_intercept_unit_test.go

@@ -168,6 +168,7 @@ func newTestGatewayHandler(t *testing.T, group *service.Group, accounts []*servi
 		nil, // tlsFPProfileService
 		nil, // channelService
 		nil, // resolver
+		nil, // balanceNotifyService
 	)
 
 	// RunModeSimple：跳过计费检查，避免引入 repo/cache 依赖。