diff --git a/internal/service/application_service.go b/internal/service/application_service.go
index ffa3615..73e2b0a 100644
--- a/internal/service/application_service.go
+++ b/internal/service/application_service.go
@@ -2,11 +2,6 @@ package service
 
 import (
 	"context"
-	"encoding/json"
-	"fmt"
-	"os"
-	"path/filepath"
-	"time"
 
 	"gcy_hpc_server/internal/model"
 	"gcy_hpc_server/internal/store"
@@ -57,58 +52,60 @@ func (s *ApplicationService) DeleteApplication(ctx context.Context, id int64) er
 	return s.store.Delete(ctx, id)
 }
 
-// SubmitFromApplication orchestrates the full submission flow.
+// [已禁用] 前端已全部迁移到 POST /tasks 接口，此方法不再被调用。
+/* // SubmitFromApplication orchestrates the full submission flow.
 // When TaskService is available, it delegates to ProcessTaskSync which creates
 // an hpc_tasks record and runs the full pipeline. Otherwise falls back to the
 // original direct implementation.
 func (s *ApplicationService) SubmitFromApplication(ctx context.Context, applicationID int64, values map[string]string) (*model.JobResponse, error) {
-	if s.taskSvc != nil {
-		req := &model.CreateTaskRequest{
-			AppID:        applicationID,
-			Values:       values,
-			InputFileIDs: nil, // old API has no file_ids concept
-			TaskName:     "",
-		}
-		return s.taskSvc.ProcessTaskSync(ctx, req)
+	// [已禁用] 旧的直接提交路径，已被 TaskService 管道取代。生产环境中 taskSvc 始终非 nil，此分支不会执行。
+	// if s.taskSvc != nil {
+	req := &model.CreateTaskRequest{
+		AppID:        applicationID,
+		Values:       values,
+		InputFileIDs: nil, // old API has no file_ids concept
+		TaskName:     "",
 	}
+	return s.taskSvc.ProcessTaskSync(ctx, req)
+	// }
 
-	// Fallback: original direct logic when TaskService not available
-	app, err := s.store.GetByID(ctx, applicationID)
-	if err != nil {
-		return nil, fmt.Errorf("get application: %w", err)
-	}
-	if app == nil {
-		return nil, fmt.Errorf("application %d not found", applicationID)
-	}
-
-	var params []model.ParameterSchema
-	if len(app.Parameters) > 0 {
-		if err := json.Unmarshal(app.Parameters, &params); err != nil {
-			return nil, fmt.Errorf("parse parameters: %w", err)
-		}
-	}
-
-	if err := ValidateParams(params, values); err != nil {
-		return nil, err
-	}
-
-	rendered := RenderScript(app.ScriptTemplate, params, values)
-
-	workDir := ""
-	if s.workDirBase != "" {
-		safeName := SanitizeDirName(app.Name)
-		subDir := time.Now().Format("20060102_150405") + "_" + RandomSuffix(4)
-		workDir = filepath.Join(s.workDirBase, safeName, subDir)
-		if err := os.MkdirAll(workDir, 0777); err != nil {
-			return nil, fmt.Errorf("create work directory %s: %w", workDir, err)
-		}
-		// 绕过 umask，确保整条路径都有写权限
-		for dir := workDir; dir != s.workDirBase; dir = filepath.Dir(dir) {
-			os.Chmod(dir, 0777)
-		}
-		os.Chmod(s.workDirBase, 0777)
-	}
-
-	req := &model.SubmitJobRequest{Script: rendered, WorkDir: workDir}
-	return s.jobSvc.SubmitJob(ctx, req)
-}
+	// // Fallback: original direct logic when TaskService not available
+	// app, err := s.store.GetByID(ctx, applicationID)
+	// if err != nil {
+	// 	return nil, fmt.Errorf("get application: %w", err)
+	// }
+	// if app == nil {
+	// 	return nil, fmt.Errorf("application %d not found", applicationID)
+	// }
+	//
+	// var params []model.ParameterSchema
+	// if len(app.Parameters) > 0 {
+	// 	if err := json.Unmarshal(app.Parameters, &params); err != nil {
+	// 		return nil, fmt.Errorf("parse parameters: %w", err)
+	// 	}
+	// }
+	//
+	// if err := ValidateParams(params, values); err != nil {
+	// 	return nil, err
+	// }
+	//
+	// rendered := RenderScript(app.ScriptTemplate, params, values)
+	//
+	// workDir := ""
+	// if s.workDirBase != "" {
+	// 	safeName := SanitizeDirName(app.Name)
+	// 	subDir := time.Now().Format("20060102_150405") + "_" + RandomSuffix(4)
+	// 	workDir = filepath.Join(s.workDirBase, safeName, subDir)
+	// 	if err := os.MkdirAll(workDir, 0777); err != nil {
+	// 		return nil, fmt.Errorf("create work directory %s: %w", workDir, err)
+	// 	}
+	// 	// 绕过 umask，确保整条路径都有写权限
+	// 	for dir := workDir; dir != s.workDirBase; dir = filepath.Dir(dir) {
+	// 		os.Chmod(dir, 0777)
+	// 	}
+	// 	os.Chmod(s.workDirBase, 0777)
+	// }
+	//
+	// req := &model.SubmitJobRequest{Script: rendered, WorkDir: workDir}
+	// return s.jobSvc.SubmitJob(ctx, req)
+} */
diff --git a/internal/service/application_service_test.go b/internal/service/application_service_test.go
index e46362a..9683a87 100644
--- a/internal/service/application_service_test.go
+++ b/internal/service/application_service_test.go
@@ -1,12 +1,8 @@
 package service
 
 import (
-	"context"
-	"encoding/json"
 	"net/http"
 	"net/http/httptest"
-	"os"
-	"path/filepath"
 	"strings"
 	"testing"
 
@@ -198,6 +194,8 @@ func TestRenderScript_NewlineInValue(t *testing.T) {
 	}
 }
 
+// [已禁用] 测试的是旧的直接提交路径，该路径已被注释掉
+/*
 func TestSubmitFromApplication_Success(t *testing.T) {
 	jobID := int32(42)
 	appSvc, cleanup := setupApplicationService(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -227,7 +225,10 @@ func TestSubmitFromApplication_Success(t *testing.T) {
 		t.Errorf("JobID = %d, want 42", resp.JobID)
 	}
 }
+*/
 
+// [已禁用] 测试的是旧的直接提交路径，该路径已被注释掉
+/*
 func TestSubmitFromApplication_AppNotFound(t *testing.T) {
 	appSvc, cleanup := setupApplicationService(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
@@ -242,7 +243,10 @@ func TestSubmitFromApplication_AppNotFound(t *testing.T) {
 		t.Errorf("error should mention 'not found', got: %v", err)
 	}
 }
+*/
 
+// [已禁用] 测试的是旧的直接提交路径，该路径已被注释掉
+/*
 func TestSubmitFromApplication_ValidationFail(t *testing.T) {
 	appSvc, cleanup := setupApplicationService(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
@@ -263,7 +267,10 @@ func TestSubmitFromApplication_ValidationFail(t *testing.T) {
 		t.Errorf("error should mention 'missing', got: %v", err)
 	}
 }
+*/
 
+// [已禁用] 测试的是旧的直接提交路径，该路径已被注释掉
+/*
 func TestSubmitFromApplication_NoParameters(t *testing.T) {
 	jobID := int32(99)
 	appSvc, cleanup := setupApplicationService(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -289,7 +296,10 @@ func TestSubmitFromApplication_NoParameters(t *testing.T) {
 		t.Errorf("JobID = %d, want 99", resp.JobID)
 	}
 }
+*/
 
+// [已禁用] 前端已全部迁移到 POST /tasks 接口，此测试不再需要。
+/*
 func TestSubmitFromApplication_DelegatesToTaskService(t *testing.T) {
 	jobID := int32(77)
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -354,3 +364,4 @@ func TestSubmitFromApplication_DelegatesToTaskService(t *testing.T) {
 		t.Errorf("task Status = %q, want %q", task.Status, model.TaskStatusQueued)
 	}
 }
+*/