Fix not rendering preview on zoom 1

frontend/src/sections/Editor2D.svelte

@@ -163,7 +163,7 @@
       ctx.strokeStyle = '#ff0000'
       ctx.lineWidth = 1
       
-      if (zoom > 1) {
+      // Draw brush preview.
       let shape: PixelPosition[]
       if (brushType === 'square' || brushSize <= 2) {
         // FIXME: This is daft to adjust +1,+1 for size 2 -- without this, the rect preview draws one pixel offset to the top-left, which is not the same as when the filled rect is placed.
@@ -180,9 +180,11 @@
       for (let i = 0; i < shape.length; i++) {
         ctx.fillRect(offsetX*zoom+(mousePixelX+shape[i].x)*zoom, offsetY*zoom+(mousePixelY+shape[i].y)*zoom, zoom, zoom)
       }
-
+      // Draw zoomed pixel-sized square where mouse is.
+      if (zoom > 1) {
         ctx.rect(offsetX*zoom+mousePixelX*zoom, offsetY*zoom+mousePixelY*zoom, 1*zoom, 1*zoom)
       }
+      // Draw  pixel square where mouse is.
       if (zoom <= 1 || zoom > 4) {
         ctx.rect(mouseX, mouseY, 1, 1)
       }