Refactor imports and remove legacy composables for improved code clarity

- Simplify imports in app.ts by removing unused SERVICE_TOKENS.
- Eliminate the NavigationItem interface in Navbar.vue as its functionality is now managed by useModularNavigation.
- Introduce new legacy composable stubs for useNostrChat and useRelayHub, indicating a shift towards modular chat and relay services.
- Update MyTicketsPage.vue to correct the import path for useUserTickets, enhancing module organization.
- Refactor ChatService to improve type handling for event tags, ensuring better type safety.

Remove ChatComponent, useNostrChat composable, and ChatPage for a modular chat architecture

- Delete ChatComponent.vue to streamline chat functionality.
- Remove legacy useNostrChat composable, transitioning to a more modular chat service approach.
- Eliminate ChatPage.vue as part of the refactor to enhance code organization and maintainability.

src/modules/chat/services/chat-service.ts

@@ -1,7 +1,7 @@
 import { ref, computed } from 'vue'
 import { eventBus } from '@/core/event-bus'
 import { injectService, SERVICE_TOKENS } from '@/core/di-container'
-import { nip04, getEventHash, finalizeEvent, type Event, type EventTemplate } from 'nostr-tools'
+import { nip04, finalizeEvent, type Event, type EventTemplate } from 'nostr-tools'
 import type { ChatMessage, ChatPeer, UnreadMessageData, ChatConfig } from '../types'
 import { getAuthToken } from '@/lib/config/lnbits'
 import { config } from '@/lib/config'
@@ -439,7 +439,7 @@ export class ChatService {
         try {
           const isFromUs = event.pubkey === userPubkey
           const peerPubkey = isFromUs 
-            ? event.tags.find(tag => tag[0] === 'p')?.[1] // Get recipient from tag
+            ? event.tags.find((tag: string[]) => tag[0] === 'p')?.[1] // Get recipient from tag
             : event.pubkey // Sender is the peer
 
           if (!peerPubkey || peerPubkey === userPubkey) continue