feat: add notification permission banner (#11)

Reviewed-on: #11

shared/src/commonMain/kotlin/su/reya/coop/NostrViewModel.kt

@@ -40,6 +40,9 @@ class NostrViewModel(
     private val nostr: Nostr,
     private val secretStore: SecretStorage
 ) : ViewModel() {
+    private val _isNotificationBannerDismissed = MutableStateFlow(false)
+    val isNotificationBannerDismissed = _isNotificationBannerDismissed.asStateFlow()
+
     private val _signerRequired = MutableStateFlow<Boolean?>(null)
     val signerRequired = _signerRequired.asStateFlow()
 
@@ -72,6 +75,9 @@ class NostrViewModel(
     private val seenPublicKeys = mutableSetOf<PublicKey>()
 
     init {
+        // Check if the notification banner has been dismissed
+        checkNotificationBannerDismissedStatus()
+
         // Check local stored secret (secret key or bunker)
         login()
 
@@ -104,6 +110,13 @@ class NostrViewModel(
         }
     }
 
+    private fun checkNotificationBannerDismissedStatus() {
+        viewModelScope.launch {
+            _isNotificationBannerDismissed.value =
+                secretStore.get("notification_banner_dismissed") == "true"
+        }
+    }
+
     private fun runObserver() {
         viewModelScope.launch {
             // Observe new messages
@@ -290,6 +303,13 @@ class NostrViewModel(
         }
     }
 
+    fun dismissNotificationBanner() {
+        viewModelScope.launch {
+            secretStore.set("notification_banner_dismissed", "true")
+            _isNotificationBannerDismissed.value = true
+        }
+    }
+
     fun dismissRelayWarning() {
         _isRelayListEmpty.value = false
     }