fixed null access on `meta`

src/ui/src/components/Ation.js

@@ -58,11 +58,11 @@ const Ation = () => {
 						<Toolbar openFile={openFile} setShowTips={setShowTips} version={version} />
 						<SlidesList deck={deck} meta={meta} font={font} />
 						<main className="main" style={{
-							"--color-hightlight" : meta.color_highlight || highlightColor,
-							"--color-slideBackground" : meta.color_background || backgroundColor,
-							"--color-slideForeground" : meta.color_text || color
+							"--color-hightlight" : meta?.color_highlight || highlightColor,
+							"--color-slideBackground" : meta?.color_background || backgroundColor,
+							"--color-slideForeground" : meta?.color_text || color
 						}}>
-							<Slide data={deck[slide] || null} style={{fontFamily : meta.font || font}}/>
+							<Slide data={deck[slide] || null} style={{fontFamily : meta?.font || font}}/>
 						</main>
 						<Tips show={showTips} />
 					</section>

src/ui/src/components/SlidesList.js

@@ -50,13 +50,13 @@ const SlidesList = ({deck, meta, font, style}) => {
 
 	return (
 		<aside className="slides-list" ref={container} style={{
-			"--color-hightlight" : meta.color_highlight       || highlightColor,
-			"--color-slideBackground" : meta.color_background || backgroundColor,
-			"--color-slideForeground" : meta.color_text       || color
+			"--color-hightlight" : meta?.color_highlight       || highlightColor,
+			"--color-slideBackground" : meta?.color_background || backgroundColor,
+			"--color-slideForeground" : meta?.color_text       || color
 		}}>
 			{deck.map((currentSlide, index) => (
 				<div className="slide-wrap" key={index}>
-					<Slide data={currentSlide} className={index === slide ? "active" : ""} style={{transform : `scale(${scale}) translateX(0)`, fontFamily: meta.font || font}} onClick={() => setSlide(index)} ref={index === slide ? current : null} />
+					<Slide data={currentSlide} className={index === slide ? "active" : ""} style={{transform : `scale(${scale}) translateX(0)`, fontFamily: meta?.font || font}} onClick={() => setSlide(index)} ref={index === slide ? current : null} />
 				</div>
 			))}
 		</aside>