feat: remove doubled upload button

src/components/layout/AppContainer.svelte

@@ -39,7 +39,7 @@
 </script>
 
 <div class="app-container">
-  <AppHeader {onUploadNewImage} />
+  <AppHeader />
 
   <ErrorMessage {errorMessage} />
 

src/components/layout/AppHeader.svelte

@@ -1,6 +1,4 @@
 <script lang="ts">
-  import Button from "../ui/Button.svelte";
-
   interface Props {
     onUploadNewImage?: () => void;
   }
@@ -10,9 +8,6 @@
 
 <div class="app-header">
   <h1>Twitch Panels Creator</h1>
-  {#if onUploadNewImage}
-    <Button variant="primary" onclick={onUploadNewImage}>Загрузить изображение</Button>
-  {/if}
 </div>
 
 <style>

src/components/panel/PanelPreview.svelte

@@ -1,9 +1,7 @@
 <script lang="ts">
-  import { uiStore, setCurrentStep } from "../../stores/uiStore";
   import type { Panel } from "$lib/types/panel";
-
-  type TextItem = Panel["texts"][0];
-  import { Stage, Layer, Image, Text } from "svelte-konva";
+  import { Image, Layer, Stage, Text } from "svelte-konva";
+  import { setCurrentStep } from "../../stores/uiStore";
   import Button from "../ui/Button.svelte";
 
   interface Props {