feat: move all common messages to i18n (ru\en)

web/src/routes/tools/[id]/+page.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
 	import ToolPage from '$lib/components/ToolPage.svelte';
 	import { getTool } from '$lib/registry';
+	import { t } from '$lib/i18n/t';
 
 	let { data } = $props();
 
@@ -8,7 +9,7 @@
 </script>
 
 <svelte:head>
-	<title>{tool?.title ?? 'Инструмент'} — easy-png-tools</title>
+	<title>{tool?.title ?? t('toolPage.fallbackTitle')} — easy-png-tools</title>
 	{#if tool}
 		<meta name="description" content={tool.description} />
 	{/if}

web/src/routes/tools/[id]/+page.ts

@@ -1,5 +1,6 @@
 import { error } from '@sveltejs/kit';
 import { getTool, TOOLS } from '$lib/registry';
+import { t } from '$lib/i18n/t';
 import type { EntryGenerator, PageLoad } from './$types';
 
 export const entries: EntryGenerator = () => TOOLS.map((tool) => ({ id: tool.id }));
@@ -7,7 +8,7 @@ export const entries: EntryGenerator = () => TOOLS.map((tool) => ({ id: tool.id
 export const load: PageLoad = ({ params }) => {
 	const tool = getTool(params.id);
 	if (!tool) {
-		error(404, 'Инструмент не найден');
+		error(404, t('errors.notFound'));
 	}
 	return { id: tool.id };
 };