feat: entity cache system, nav UX improvements, split CLAUDE.md

- Add $state-based entity cache layer with 30s TTL, request deduplication,
  and local mutation helpers (entity-cache.svelte.ts + caches.svelte.ts)
- Wire all 10 page components to use shared caches for cross-page data
- Add slide animation for nav tree expand/collapse with rotating chevron
- Remove aggregate count badges from container nav nodes (keep on leaves)
- Convert Targets from flat leaf to group with per-type children
  (Telegram, Webhook, Email, Discord, Slack, ntfy, Matrix)
- Add URL-based type filtering on Targets page with per-type descriptions
- Add Bots group children for Email and Matrix alongside Telegram
- Tab-based routing for bots page (?tab=telegram/email/matrix)
- Add per-type target counts and email/matrix bot counts to /status/counts
- Split CLAUDE.md into focused context files under .claude/docs/
- Fix .gitignore: scope lib/ to root, allow .claude/docs/ tracking
- Clear all caches on logout
- Reset form state when switching target type tabs

frontend/src/routes/template-configs/+page.svelte

@@ -3,6 +3,7 @@
 	import { slide } from 'svelte/transition';
 	import { api } from '$lib/api';
 	import { t } from '$lib/i18n';
+	import { templateConfigsCache } from '$lib/stores/caches.svelte';
 	import PageHeader from '$lib/components/PageHeader.svelte';
 	import Card from '$lib/components/Card.svelte';
 	import Loading from '$lib/components/Loading.svelte';
@@ -17,7 +18,7 @@
 	import { snackSuccess, snackError } from '$lib/stores/snackbar.svelte';
 	import type { TemplateConfig } from '$lib/types';
 
-	let configs = $state<TemplateConfig[]>([]);
+	let configs = $derived(templateConfigsCache.items);
 	let loaded = $state(false);
 	let varsRef = $state<Record<string, any>>({});
 	let showVarsFor = $state<string | null>(null);
@@ -133,8 +134,8 @@
 	onMount(load);
 	async function load() {
 		try {
-			[configs, varsRef, allCapabilities] = await Promise.all([
-				api('/template-configs'),
+			[, varsRef, allCapabilities] = await Promise.all([
+				templateConfigsCache.fetch(true),
 				api('/template-configs/variables'),
 				api('/providers/capabilities'),
 			]);