feat: Centralize configuration management for Nostr and API settings

- Introduce a new config module to manage Nostr relays, admin pubkeys, and API settings.
- Update components to utilize the centralized config instead of environment variables directly.
- Refactor relevant files to improve maintainability and reduce reliance on environment variables.

src/components/events/PurchaseTicketDialog.vue

@@ -6,6 +6,7 @@ import { Button } from '@/components/ui/button'
 import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
 import QRCode from 'qrcode'
+import { config } from '@/lib/config'
 
 interface Props {
   event: {
@@ -49,14 +50,14 @@ async function handleSubmit() {
   isLoading.value = true
   error.value = ''
 
-  const apiUrl = `${import.meta.env.VITE_API_BASE_URL}/events/api/v1/tickets/${props.event.id}/${encodeURIComponent(name.value)}/${encodeURIComponent(email.value)}`
+  const apiUrl = `${config.api.baseUrl}/events/api/v1/tickets/${props.event.id}/${encodeURIComponent(name.value)}/${encodeURIComponent(email.value)}`
   console.log('Calling API:', apiUrl)
 
   try {
     const response = await fetch(apiUrl, {
       headers: {
         'Accept': 'application/json',
-        'X-API-KEY': import.meta.env.VITE_API_KEY
+        'X-API-KEY': config.api.key
       }
     })
 

src/components/nostr/NostrFeed.vue

@@ -7,6 +7,7 @@ import { ScrollArea } from '@/components/ui/scroll-area'
 import { Badge } from '@/components/ui/badge'
 import { formatDistanceToNow } from 'date-fns'
 import { Megaphone } from 'lucide-vue-next'
+import { config, configUtils } from '@/lib/config'
 
 const props = defineProps<{
   relays?: string[]
@@ -17,14 +18,11 @@ const notes = ref<NostrNote[]>([])
 const isLoading = ref(true)
 const error = ref<Error | null>(null)
 
-const relayUrls = props.relays || JSON.parse(import.meta.env.VITE_NOSTR_RELAYS as string)
+const relayUrls = props.relays || config.nostr.relays
 const { disconnect } = useNostr({ relays: relayUrls })
 
-// Get admin/moderator pubkeys from environment
-// These should be hex pubkeys of trusted moderators/admins
-const adminPubkeys = import.meta.env.VITE_ADMIN_PUBKEYS 
-  ? JSON.parse(import.meta.env.VITE_ADMIN_PUBKEYS as string) 
-  : []
+// Get admin/moderator pubkeys from centralized config
+const adminPubkeys = config.nostr.adminPubkeys
 
 async function loadNotes() {
   try {