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/canvas/useCanvasInput.ts

@@ -72,6 +72,8 @@ export function useCanvasInput(
     };
 
     const handleKeyDown = (event: KeyboardEvent) => {
+      if (isEditableKeyboardTarget(event.target)) return;
+
       const consumed = panHandler.keyDown(keybindEventFromKeyboardEvent(event));
       if (consumed) {
         clearBrushPreview();
@@ -80,6 +82,8 @@ export function useCanvasInput(
     };
 
     const handleKeyUp = (event: KeyboardEvent) => {
+      if (isEditableKeyboardTarget(event.target)) return;
+
       const consumed = panHandler.keyUp(keybindEventFromKeyboardEvent(event));
       if (consumed) event.preventDefault();
     };
@@ -236,6 +240,13 @@ export function useCanvasInput(
   return { isPanning };
 }
 
+function isEditableKeyboardTarget(target: EventTarget | null) {
+  return (
+    target instanceof HTMLElement &&
+    (target.isContentEditable || target instanceof HTMLInputElement || target instanceof HTMLTextAreaElement || target instanceof HTMLSelectElement)
+  );
+}
+
 function pointInsideCanvas(point: { x: number; y: number }, canvas: HTMLCanvasElement) {
   return point.x >= 0 && point.y >= 0 && point.x <= canvas.width && point.y <= canvas.height;
 }