feat: test menu dropdown, split text/media messages, target settings, provider URL links

- Replace 3 test buttons with unified dropdown menu (basic/periodic/scheduled/memory)
- Send text message first, then assets as reply (not combined caption+media)
- Pass all target config settings to Telegram client (disable_url_preview, max_media, chunk_delay, etc.)
- Real data test notifications for periodic/scheduled/memory (fetch from Immich)
- Provider card URL is now a clickable hyperlink
- Localized test type labels (EN/RU)

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

frontend/src/routes/+page.svelte

@@ -6,9 +6,11 @@
 	import Card from '$lib/components/Card.svelte';
 	import Loading from '$lib/components/Loading.svelte';
 	import MdiIcon from '$lib/components/MdiIcon.svelte';
+	import EventChart from '$lib/components/EventChart.svelte';
 
 	let status = $state<any>(null);
 	let providers = $state<any[]>([]);
+	let chartDays = $state<any[]>([]);
 	let loaded = $state(false);
 	let error = $state('');
 
@@ -33,7 +35,7 @@
 	function calcPageSize(): number {
 		if (typeof window === 'undefined') return 8;
 		const EVENT_ROW_HEIGHT = 50; // px per event row (content + gap)
-		const FIXED_OVERHEAD = 390; // header + stats + events header + filters + paginator + padding
+		const FIXED_OVERHEAD = 600; // header + stats + chart + events header + filters + paginator + padding
 		const available = window.innerHeight - FIXED_OVERHEAD;
 		return Math.max(3, Math.floor(available / EVENT_ROW_HEIGHT));
 	}
@@ -108,10 +110,14 @@
 
 	async function loadInitial() {
 		try {
-			[status, providers] = await Promise.all([
+			const [statusRes, providersRes, chartRes] = await Promise.all([
 				api<any>(`/status?limit=${eventsLimit}`),
 				api<any[]>('/providers'),
+				api<any>('/status/chart'),
 			]);
+			status = statusRes;
+			providers = providersRes;
+			chartDays = chartRes.days || [];
 			setTimeout(() => {
 				animateCount(0, status.providers, (v) => displayProviders = v);
 				animateCount(0, status.trackers.active, (v) => displayActive = v);
@@ -200,6 +206,8 @@
 		{/each}
 	</div>
 
+	<EventChart days={chartDays} />
+
 	<h3 class="text-base font-semibold mb-3 flex items-center gap-2">
 		<MdiIcon name="mdiPulse" size={18} />
 		{t('dashboard.recentEvents')}