feat: add generation cancel job functionality and improve job handling

- Introduced `generationCancelJob` command ID in `commands/ids.ts`.
- Added `GenerationCancelJobPayload` type in `commands/payloads.ts`.
- Enhanced job status to include "cancelled" in `editor/state.ts`.
- Updated `runGenerationJob` to accept an `AbortSignal` and handle cancellation.
- Implemented cancellation logic in `runGenerate` and related functions.
- Added tests for job cancellation in `operations/generation/workflow.test.ts`.
- Improved layer rendering logic to prevent stack overflow in `editor/document-indexes.ts`.
- Added raster size assertions in `platform/browser/rasterLimits.ts` for image processing limits.
- Enhanced image file handling to check for size limits in `platform/browser/imageFiles.ts`.
- Updated UI components to reflect job cancellation state in `view/GenerationJobStatus.tsx` and `view/bottom-controls/GenerateActionControls.tsx`.

platform/browser/imageFiles.ts

@@ -8,8 +8,16 @@ export type BrowserImageFile = {
 
 export async function decodeBrowserImageFile(file: File): Promise<BrowserImageFile | undefined> {
   if (!file.type.startsWith("image/")) return undefined;
+  if (file.size > 128 * 1024 * 1024) throw new Error("Image file is too large. The import limit is 128 MB.");
+  const objectUrl = URL.createObjectURL(file);
+  let intrinsicSize: { w: number; h: number };
+  try {
+    intrinsicSize = await loadImageSize(objectUrl);
+    assertCanvasRasterSize(intrinsicSize.w, intrinsicSize.h, "Imported image");
+  } finally {
+    URL.revokeObjectURL(objectUrl);
+  }
   const source = await fileToDataUrl(file);
-  const intrinsicSize = await loadImageSize(source);
   return { name: file.name, mimeType: file.type, source, intrinsicSize, release: () => undefined };
 }
 
@@ -30,3 +38,4 @@ function loadImageSize(source: string): Promise<{ w: number; h: number }> {
     image.src = source;
   });
 }
+import { assertCanvasRasterSize } from "./rasterLimits";