feat: add ComfyUI integration for image generation

- Implemented ComfyUI API for generating images with various modes (text-to-image, image-to-image, inpaint, outpaint).
- Created GenerateSheet and associated controls for user input on generation settings.
- Added subtle scrollbar styles for improved UI experience.
- Enhanced canvas input handling to ignore key events when focused on editable elements.
- Optimized canvas resizing logic to prevent unnecessary dispatches.
- Introduced error handling for generation failures and loading models.
- Added functionality to upload images and masks for inpainting.

view/index.css

@@ -66,4 +66,27 @@
     outline: 1px solid rgb(255 255 255);
     outline-offset: 2px;
   }
+
+  .subtle-scrollbar {
+    scrollbar-width: thin;
+    scrollbar-color: rgb(255 255 255 / 0.16) transparent;
+  }
+
+  .subtle-scrollbar::-webkit-scrollbar {
+    width: 0.375rem;
+    height: 0.375rem;
+  }
+
+  .subtle-scrollbar::-webkit-scrollbar-track {
+    background: transparent;
+  }
+
+  .subtle-scrollbar::-webkit-scrollbar-thumb {
+    border-radius: 9999px;
+    background: rgb(255 255 255 / 0.12);
+  }
+
+  .subtle-scrollbar:hover::-webkit-scrollbar-thumb {
+    background: rgb(255 255 255 / 0.22);
+  }
 }