feat: IconGridSelect, CrossLink, SearchPalette components + entity crosslinks

New components:
- IconGridSelect: Visual grid selector replacing <select> dropdowns,
  with icon + label cells, fixed-position popup, smart placement
- CrossLink: Inline clickable badge for cross-entity navigation,
  hover highlights primary, used on entity cards
- SearchPalette: Ctrl+K global command palette, searches all entity
  types via cached data, grouped results, keyboard navigation

Integration:
- Targets: type selector uses IconGridSelect (4-column grid with icons)
- Targets: bot crosslink on telegram/email/matrix target cards
- Command Trackers: provider and config badges → CrossLinks
- Command Trackers: listener bot name → CrossLink
- Command Configs: template config shown as CrossLink on card
- Notification Trackers: provider CrossLink added to card
- Layout: SearchPalette mounted globally

Infrastructure:
- Added CommandConfig, CommandTemplateConfig, CommandTracker types
- Added notificationTrackersCache, commandTrackersCache to caches
- Added allCaches map and fetchAllCaches() for search palette
- Added searchPalette i18n keys (EN/RU)

frontend/src/routes/command-trackers/+page.svelte

@@ -12,6 +12,7 @@
 	import EmptyState from '$lib/components/EmptyState.svelte';
 	import ConfirmModal from '$lib/components/ConfirmModal.svelte';
 	import IconButton from '$lib/components/IconButton.svelte';
+	import CrossLink from '$lib/components/CrossLink.svelte';
 	import { snackSuccess, snackError } from '$lib/stores/snackbar.svelte';
 	import type { ServiceProvider, TelegramBot } from '$lib/types';
 
@@ -231,8 +232,8 @@
 						<div class="flex items-center gap-2">
 							<span style="color: var(--color-primary);"><MdiIcon name={trk.icon || 'mdiConsoleLine'} size={20} /></span>
 							<p class="font-medium">{trk.name}</p>
-							<span class="text-xs px-1.5 py-0.5 rounded bg-[var(--color-muted)] text-[var(--color-muted-foreground)]">{providerName(trk.provider_id)}</span>
-							<span class="text-xs px-1.5 py-0.5 rounded bg-[var(--color-muted)] text-[var(--color-muted-foreground)]">{configName(trk.command_config_id)}</span>
+							<CrossLink href="/providers" icon="mdiServer" label={providerName(trk.provider_id)} />
+							<CrossLink href="/command-configs" icon="mdiCog" label={configName(trk.command_config_id)} />
 							<span class="text-xs px-1.5 py-0.5 rounded font-mono {trk.enabled
 								? 'bg-emerald-500/10 text-emerald-500'
 								: 'bg-red-500/10 text-red-500'}">
@@ -269,7 +270,7 @@
 									<div class="flex items-center justify-between text-sm px-2 py-1 rounded hover:bg-[var(--color-muted)]">
 										<div class="flex items-center gap-2">
 											<MdiIcon name="mdiRobot" size={14} />
-											<span class="font-medium">{listener.name || listener.listener_type}</span>
+											<CrossLink href="/telegram-bots" icon="mdiRobot" label={listener.name || listener.listener_type} />
 											<span class="text-xs px-1.5 py-0.5 rounded bg-blue-500/10 text-blue-500 font-mono">{listener.listener_type}</span>
 										</div>
 										<IconButton icon="mdiClose" title={t('commandTracker.removeListener')} size={14}