fix(ui): keep trash counter in sync with trash changes

Reload the rail trash count after every operation that changes the
trash contents, not just navigation and empty-trash: moving photos to
trash (grid, panel, viewer), restoring, permanent delete and deleting
an album. Previously the counter stayed stale until the next route
change.

frontend/src/routes/(app)/albums/[id]/+page.svelte

@@ -13,6 +13,7 @@
 	import { density } from '$lib/stores/density.svelte';
 	import { selection } from '$lib/stores/selection.svelte';
 	import { photoUpdates } from '$lib/stores/photo-updates.svelte';
+	import { trash } from '$lib/stores/trash.svelte';
 	import { viewerReturn } from '$lib/stores/viewer-return';
 	import { transfer } from '$lib/stores/transfer.svelte';
 	import { contextMenu, type ContextMenuItem } from '$lib/stores/context-menu.svelte';
@@ -295,6 +296,7 @@
 			await photosApi.deleteBatch(selection.ids);
 			selection.clear();
 			pendingDelete = false;
+			await trash.load();
 		} catch (e) {
 			error = (e as Error).message;
 		} finally {

frontend/src/routes/(app)/albums/[id]/photos/[photoId]/+page.svelte

@@ -7,6 +7,7 @@
 	import ConfirmDialog from '$lib/components/ConfirmDialog.svelte';
 	import { viewerActions } from '$lib/stores/viewer-actions.svelte';
 	import { photoUpdates } from '$lib/stores/photo-updates.svelte';
+	import { trash } from '$lib/stores/trash.svelte';
 	import { viewerReturn } from '$lib/stores/viewer-return';
 	import type { Album, Photo } from '$lib/types';
 
@@ -79,6 +80,7 @@
 		try {
 			await api(`/photos/${photo.id}`, { method: 'DELETE' });
 			pendingDelete = null;
+			await trash.load();
 			const remaining = photos.filter((p) => p.id !== photo.id);
 			if (remaining.length > 0) {
 				const next = remaining[Math.min(Math.max(index, 0), remaining.length - 1)];

frontend/src/routes/(app)/albums/[id]/settings/+page.svelte

@@ -3,6 +3,7 @@
 	import { goto } from '$app/navigation';
 	import { api } from '$lib/api';
 	import Icon from '$lib/components/Icon.svelte';
+	import { trash } from '$lib/stores/trash.svelte';
 	import type { Album, ShareLink } from '$lib/types';
 
 	const albumId = $derived($page.params.id);
@@ -73,6 +74,7 @@
 		if (!confirm('Удалить альбом вместе с фото?')) return;
 		try {
 			await api(`/albums/${albumId}`, { method: 'DELETE' });
+			await trash.load();
 			goto('/');
 		} catch (e) {
 			error = (e as Error).message;