fix: pass app version via server load instead of Vite define

The Svelte 5 SSR compiler was optimizing away the __APP_VERSION__
constant set via Vite's define, causing the version to be missing
from the production footer. Use a +layout.server.ts load function
to pass the version from package.json instead.

Also bumps version to 0.1.6.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "crumbs",
   "private": true,
-  "version": "0.1.5",
+  "version": "0.1.6",
   "type": "module",
   "scripts": {
     "dev": "vite dev",

src/app.d.ts

@@ -1,8 +1,6 @@
 // See https://svelte.dev/docs/kit/types#app.d.ts
 // for information about these interfaces
 declare global {
-	const __APP_VERSION__: string;
-
 	namespace App {
 		// interface Error {}
 		// interface Locals {}

src/routes/+layout.server.ts

@@ -0,0 +1,5 @@
+import { version } from '../../package.json';
+
+export function load() {
+	return { appVersion: version };
+}

src/routes/+layout.svelte

@@ -6,9 +6,7 @@
 	import { loadNotes } from '$lib/stores/notes.js';
 	import { onMount } from 'svelte';
 
-	const appVersion = __APP_VERSION__;
-
-	let { children } = $props();
+	let { data, children } = $props();
 	let sidebarOpen = $state(false);
 
 	onMount(() => {
@@ -27,7 +25,7 @@
 	</main>
 
 	<footer class="pb-4 pt-8 text-center text-xs text-gray-400 lg:ml-64">
-		Crumbs by Bretzel v{appVersion} &mdash; made with 🥨 in Strasbourg
+		Crumbs by Bretzel v{data.appVersion} &mdash; made with 🥨 in Strasbourg
 	</footer>
 
 	<Toast />

vite.config.ts

@@ -1,15 +1,9 @@
-import { readFileSync } from 'node:fs';
 import { sveltekit } from '@sveltejs/kit/vite';
 import { SvelteKitPWA } from '@vite-pwa/sveltekit';
 import tailwindcss from '@tailwindcss/vite';
 import { defineConfig } from 'vite';
 
-const pkg = JSON.parse(readFileSync('package.json', 'utf-8'));
-
 export default defineConfig({
-	define: {
-		__APP_VERSION__: JSON.stringify(pkg.version)
-	},
 	plugins: [
 		tailwindcss(),
 		sveltekit(),