Update sidebar version display to use dynamic APP_VERSION import for improved maintainability

src/components/Sidebar.svelte

@@ -23,6 +23,7 @@
 	} from 'lucide-svelte';
 	import { toast } from '$lib/toast.svelte';
 	import { slide } from 'svelte/transition';
+	import { APP_VERSION } from '$lib/version';
 
 	let { onOpenSettings } = $props();
 
@@ -502,7 +503,7 @@
 					class="flex items-center gap-1.5 text-[11px] text-text-secondary hover:text-accent-blue transition-colors font-medium"
 				>
 					<GitBranch size={13} />
-					<span>v0.2.0</span>
+					<span>v{APP_VERSION}</span>
 				</a>
 				<p class="text-[11px] text-text-secondary font-medium">
 					Created by <a