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/lib/stores/caches.svelte.ts

@@ -0,0 +1,59 @@
+/**
+ * Singleton entity caches for all shared entities.
+ *
+ * Import from here in page components:
+ *   import { providersCache, targetsCache } from '$lib/stores/caches.svelte';
+ */
+
+import { createEntityCache } from './entity-cache.svelte';
+import type {
+	ServiceProvider,
+	NotificationTarget,
+	TrackingConfig,
+	TemplateConfig,
+	TelegramBot,
+	EmailBot,
+	MatrixBot,
+} from '$lib/types';
+
+/** Service providers — used by Dashboard, Trackers, Command Trackers, Providers page. */
+export const providersCache = createEntityCache<ServiceProvider>('/providers');
+
+/** Notification targets — used by Trackers, Targets page. */
+export const targetsCache = createEntityCache<NotificationTarget>('/targets');
+
+/** Tracking configs — used by Trackers, Tracking Configs page. */
+export const trackingConfigsCache = createEntityCache<TrackingConfig>('/tracking-configs');
+
+/** Template configs — used by Trackers, Template Configs page. */
+export const templateConfigsCache = createEntityCache<TemplateConfig>('/template-configs');
+
+/** Telegram bots — used by Targets, Command Trackers, Bots page. */
+export const telegramBotsCache = createEntityCache<TelegramBot>('/telegram-bots');
+
+/** Email bots — used by Targets, Bots page. */
+export const emailBotsCache = createEntityCache<EmailBot>('/email-bots');
+
+/** Matrix bots — used by Targets, Bots page. */
+export const matrixBotsCache = createEntityCache<MatrixBot>('/matrix-bots');
+
+// Command-specific caches (less shared but still benefit from caching)
+
+export const commandConfigsCache = createEntityCache<any>('/command-configs');
+
+export const commandTemplateConfigsCache = createEntityCache<any>('/command-template-configs');
+
+/**
+ * Invalidate all entity caches. Useful on logout.
+ */
+export function clearAllCaches(): void {
+	providersCache.clear();
+	targetsCache.clear();
+	trackingConfigsCache.clear();
+	templateConfigsCache.clear();
+	telegramBotsCache.clear();
+	emailBotsCache.clear();
+	matrixBotsCache.clear();
+	commandConfigsCache.clear();
+	commandTemplateConfigsCache.clear();
+}