its a bit broken

internal/api/jobs.go

@@ -25,7 +25,6 @@ import (
 	authpkg "jiggablend/internal/auth"
 	"jiggablend/pkg/types"
 
-	"github.com/go-chi/chi/v5"
 	"github.com/gorilla/websocket"
 
 	"jiggablend/pkg/scripts"
@@ -62,7 +61,7 @@ func (s *Server) handleCreateJob(w http.ResponseWriter, r *http.Request) {
 
 	var req types.CreateJobRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-		s.respondError(w, http.StatusBadRequest, "Invalid request body")
+		s.respondError(w, http.StatusBadRequest, fmt.Sprintf("Invalid request body: expected valid JSON - %v", err))
 		return
 	}
 
@@ -83,7 +82,7 @@ func (s *Server) handleCreateJob(w http.ResponseWriter, r *http.Request) {
 			s.respondError(w, http.StatusBadRequest, "frame_start and frame_end are required for render jobs")
 			return
 		}
-		if *req.FrameStart < 0 || *req.FrameEnd < *req.FrameStart {
+		if *req.FrameEnd < *req.FrameStart {
 			s.respondError(w, http.StatusBadRequest, "Invalid frame range")
 			return
 		}
@@ -671,7 +670,7 @@ func (s *Server) handleBatchGetJobs(w http.ResponseWriter, r *http.Request) {
 		JobIDs []int64 `json:"job_ids"`
 	}
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-		s.respondError(w, http.StatusBadRequest, "Invalid request body")
+		s.respondError(w, http.StatusBadRequest, fmt.Sprintf("Invalid request body: expected valid JSON - %v", err))
 		return
 	}
 
@@ -1677,7 +1676,7 @@ func (s *Server) extractMetadataFromTempContext(contextPath string) (*types.Blen
 	})
 
 	if err != nil || blendFile == "" {
-		return nil, fmt.Errorf("no .blend file found in context")
+		return nil, fmt.Errorf("no .blend file found in context - the uploaded context archive must contain at least one .blend file to render")
 	}
 
 	// Use the same extraction script and process as extractMetadataFromContext
@@ -1894,7 +1893,7 @@ func (s *Server) createContextFromDir(sourceDir, destPath string, excludeFiles .
 	}
 
 	if blendFilesAtRoot == 0 {
-		return "", fmt.Errorf("no .blend file found at root level in context archive")
+		return "", fmt.Errorf("no .blend file found at root level in context archive - .blend files must be at the root level of the uploaded archive, not in subdirectories")
 	}
 	if blendFilesAtRoot > 1 {
 		return "", fmt.Errorf("multiple .blend files found at root level in context archive (found %d, expected 1)", blendFilesAtRoot)
@@ -2958,7 +2957,7 @@ func (s *Server) handleBatchGetTasks(w http.ResponseWriter, r *http.Request) {
 		TaskIDs []int64 `json:"task_ids"`
 	}
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-		s.respondError(w, http.StatusBadRequest, "Invalid request body")
+		s.respondError(w, http.StatusBadRequest, fmt.Sprintf("Invalid request body: expected valid JSON - %v", err))
 		return
 	}
 
@@ -3057,10 +3056,9 @@ func (s *Server) handleGetTaskLogs(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	taskIDStr := chi.URLParam(r, "taskId")
-	taskID, err := strconv.ParseInt(taskIDStr, 10, 64)
+	taskID, err := parseID(r, "taskId")
 	if err != nil {
-		s.respondError(w, http.StatusBadRequest, "Invalid task ID")
+		s.respondError(w, http.StatusBadRequest, err.Error())
 		return
 	}
 
@@ -3196,10 +3194,9 @@ func (s *Server) handleGetTaskSteps(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	taskIDStr := chi.URLParam(r, "taskId")
-	taskID, err := strconv.ParseInt(taskIDStr, 10, 64)
+	taskID, err := parseID(r, "taskId")
 	if err != nil {
-		s.respondError(w, http.StatusBadRequest, "Invalid task ID")
+		s.respondError(w, http.StatusBadRequest, err.Error())
 		return
 	}
 
@@ -3304,10 +3301,9 @@ func (s *Server) handleRetryTask(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	taskIDStr := chi.URLParam(r, "taskId")
-	taskID, err := strconv.ParseInt(taskIDStr, 10, 64)
+	taskID, err := parseID(r, "taskId")
 	if err != nil {
-		s.respondError(w, http.StatusBadRequest, "Invalid task ID")
+		s.respondError(w, http.StatusBadRequest, err.Error())
 		return
 	}
 
@@ -3396,10 +3392,9 @@ func (s *Server) handleStreamTaskLogsWebSocket(w http.ResponseWriter, r *http.Re
 		return
 	}
 
-	taskIDStr := chi.URLParam(r, "taskId")
-	taskID, err := strconv.ParseInt(taskIDStr, 10, 64)
+	taskID, err := parseID(r, "taskId")
 	if err != nil {
-		s.respondError(w, http.StatusBadRequest, "Invalid task ID")
+		s.respondError(w, http.StatusBadRequest, err.Error())
 		return
 	}