feat!(backend): unify script run and ad-hoc job run

backend/internal/handlers/jobs.go

@@ -72,35 +72,49 @@ func (h *JobsHandlers) AddJob(c *gin.Context) {
 		return
 	}
 
-	agent, ok := h.tracker.GetAgent(in.AgentID)
-	if !ok {
-		c.Status(http.StatusNotFound)
-		c.Error(fmt.Errorf("agent not found"))
-		return
-	}
-
-	command, err := resolveCommand(c, h.svc, in.InterpreterID, in.Command)
+	result, err := h.runCommand(c, in.AgentID, in.InterpreterID, in.Command, in.Stdin)
 	if err != nil {
 		c.Error(err)
 		return
 	}
 
+	c.JSON(http.StatusCreated, result)
+}
+
+// runCommand resolves command, submits a job to the agent, and returns AddJobOut.
+// Shared between jobs and scripts handlers.
+func (h *JobsHandlers) runCommand(
+	c *gin.Context,
+	agentID string,
+	interpID int64,
+	command string,
+	stdin *string,
+) (*AddJobOut, error) {
+	agent, ok := h.tracker.GetAgent(agentID)
+	if !ok {
+		return nil, fmt.Errorf("agent not found")
+	}
+
+	cmd, err := resolveCommand(c, h.svc, interpID, command)
+	if err != nil {
+		return nil, err
+	}
+
 	jid, err := agent.AddJob(models.JobForInsert{
-		Command: command,
-		Stdin:   in.Stdin,
+		Command: cmd,
+		Stdin:   stdin,
 	})
 	if err != nil {
-		c.Error(err)
-		return
+		return nil, err
 	}
 
 	waitURL := fmt.Sprintf("%s/api/v1/jobs/%d/wait", h.whereami, jid)
 
-	c.JSON(http.StatusCreated, AddJobOut{
+	return &AddJobOut{
 		ID:      jid,
-		Command: command,
+		Command: cmd,
 		WaitURL: waitURL,
-	})
+	}, nil
 }
 
 // WaitJob waits for a submitted job to complete (long-poll).