Add tests for main package, manager, and various components

- Introduced unit tests for the main package to ensure compilation.
- Added tests for the manager, including validation of upload sessions and handling of Blender binary paths.
- Implemented tests for job token generation and validation, ensuring security and integrity.
- Created tests for configuration management and database schema to verify functionality.
- Added tests for logger and runner components to enhance overall test coverage and reliability.

web/static/job_new.js

@@ -169,11 +169,27 @@
     });
     const data = await res.json().catch(() => ({}));
     if (!res.ok) {
-      throw new Error(data.error || "Job creation failed");
+      const err = new Error(data.error || "Job creation failed");
+      if (data && typeof data.code === "string") {
+        err.code = data.code;
+      }
+      throw err;
     }
     return data;
   }
 
+  function resetToUploadStep(message) {
+    sessionID = "";
+    clearInterval(pollTimer);
+    setUploadBusy(false);
+    mainBlendWrapper.classList.add("hidden");
+    metadataPreview.innerHTML = "";
+    configSection.classList.add("hidden");
+    setStep(1);
+    showStatus("Please upload the file again.");
+    showError(message);
+  }
+
   async function runSubmission(mainBlendFile) {
     showError("");
     setStep(1);
@@ -277,6 +293,14 @@
       showError("");
       await submitJobConfig();
     } catch (err) {
+      if (err && err.code === "UPLOAD_SESSION_EXPIRED") {
+        resetToUploadStep(err.message || "Upload session expired. Please upload the file again.");
+        return;
+      }
+      if (err && err.code === "UPLOAD_SESSION_NOT_READY") {
+        showError(err.message || "Upload session is still processing. Please wait and try again.");
+        return;
+      }
       showError(err.message || "Failed to create job");
     }
   });