feat: telegram commands, app settings, bot polling, webhook handling, UI improvements

Adds telegram bot command system with 13 commands (search, latest, random, etc.),
webhook/polling handlers, rate limiting, app settings page, and various UI/UX
improvements across all entity pages.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/routes/users/+page.svelte

@@ -9,16 +9,18 @@
 	import Modal from '$lib/components/Modal.svelte';
 	import ConfirmModal from '$lib/components/ConfirmModal.svelte';
 	import MdiIcon from '$lib/components/MdiIcon.svelte';
+	import EmptyState from '$lib/components/EmptyState.svelte';
 	import IconButton from '$lib/components/IconButton.svelte';
 	import { snackSuccess, snackError } from '$lib/stores/snackbar.svelte';
+	import type { User } from '$lib/types';
 
 	const auth = getAuth();
-	let users = $state<any[]>([]);
+	let users = $state<User[]>([]);
 	let showForm = $state(false);
 	let form = $state({ username: '', password: '', role: 'user' });
 	let error = $state('');
 	let loaded = $state(false);
-	let confirmDelete = $state<any>(null);
+	let confirmDelete = $state<{ id: number; onconfirm: () => Promise<void> } | null>(null);
 
 	// Admin reset password
 	let resetUserId = $state<number | null>(null);
@@ -99,10 +101,7 @@
 
 {#if users.length === 0}
 <Card>
-	<div class="flex flex-col items-center py-8 gap-3" style="color: var(--color-muted-foreground);">
-		<div style="opacity: 0.4;"><MdiIcon name="mdiAccountGroup" size={40} /></div>
-		<p class="text-sm">{t('common.loadError')}</p>
-	</div>
+	<EmptyState icon="mdiAccountGroup" message={t('users.noUsers')} />
 </Card>
 {:else}
 <div class="space-y-3 stagger-children">