Fixing ugly canvas. now full browser window, fixing dpi blurry issue

src/ui.ts

@@ -25,7 +25,12 @@ let focusedInputSubmit: Value | null = null;
 export function render(ui: UIValue, canvas: HTMLCanvasElement) {
     const ctx = canvas.getContext('2d');
     if (ctx) {
+        const dpr = window.devicePixelRatio || 1;
+
         ctx.clearRect(0, 0, canvas.width, canvas.height);
+
+        ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
+
         clickRegions = [];
         textInputRegions = [];
         renderUI(ui, ctx, 0, 0);