fix: unwrap GiftWraps for all writable accounts when always-on is enabled

When the always-on notification service is on, preload every saved writable
account into AccountCacheState so each one's newNotesPreProcessor subscribes
to LocalCache.live.newEventBundles. Without this, relay-delivered GiftWraps
addressed to non-active accounts would sit in LocalCache undeconstructed,
and NotificationDispatcher never fires for them.

The preload observes LocalPreferences.accountsFlow so accounts added during
a session (login flow) join automatically. On disable, the collector is
cancelled and every cached account except the active one is released —
users with the setting off keep today's single-account battery footprint.

Loading an account is idempotent (AccountCacheState checks cache first),
so this cannot double-init or conflict with PushWrapDecryptor's on-demand
loadAccount calls. Loading does not affect the active account selected by
AccountSessionManager, so the UI is unaffected.

amethyst/src/main/java/com/vitorpamplona/amethyst/AppModules.kt

@@ -395,8 +395,17 @@ class AppModules(
         )
     }
 
-    // Manages always-on notification service lifecycle
-    val alwaysOnNotificationServiceManager = AlwaysOnNotificationServiceManager(appContext, applicationIOScope)
+    // Manages always-on notification service lifecycle. Preloads every saved
+    // writable account while enabled so GiftWraps for non-active accounts still
+    // get unwrapped by their owning account's newNotesPreProcessor.
+    val alwaysOnNotificationServiceManager =
+        AlwaysOnNotificationServiceManager(
+            context = appContext,
+            scope = applicationIOScope,
+            accountsCache = accountsCache,
+            localPreferences = LocalPreferences,
+            activePubKeyProvider = { sessionManager.loggedInAccount()?.pubKey },
+        )
 
     // Observes LocalCache for notification-relevant events and routes them to
     // EventNotificationConsumer. Sources: FCM, UnifiedPush, Pokey, active relay

amethyst/src/main/java/com/vitorpamplona/amethyst/model/accountsCache/AccountCacheState.kt

@@ -21,6 +21,7 @@
 package com.vitorpamplona.amethyst.model.accountsCache
 
 import android.content.ContentResolver
+import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.AccountSettings
 import com.vitorpamplona.amethyst.model.LocalCache
@@ -68,6 +69,42 @@ class AccountCacheState(
         }
     }
 
+    /**
+     * Loads every saved account that can sign (has a private key or an external signer)
+     * into the cache. Safe to call repeatedly — [loadAccount] is idempotent, so already
+     * loaded accounts are returned as-is. Used by the always-on notification service so
+     * GiftWraps addressed to non-active accounts still get unwrapped and notified.
+     */
+    suspend fun loadAllWritableAccounts(localPreferences: LocalPreferences) {
+        localPreferences.allSavedAccounts().forEach { savedAccount ->
+            if (!savedAccount.hasPrivKey && !savedAccount.loggedInWithExternalSigner) return@forEach
+            try {
+                val accountSettings = localPreferences.loadAccountConfigFromEncryptedStorage(savedAccount.npub) ?: return@forEach
+                loadAccount(accountSettings)
+            } catch (e: Exception) {
+                if (e is kotlinx.coroutines.CancellationException) throw e
+                Log.w("AccountCacheState", "Failed to preload account ${savedAccount.npub}: ${e.message}", e)
+            }
+        }
+    }
+
+    /**
+     * Cancels and removes every cached account whose pubkey is not in [keepPubkeys].
+     * Used to release accounts that were preloaded for background notification handling
+     * when the always-on service is turned off, while preserving the active account.
+     */
+    fun retainOnly(keepPubkeys: Set<HexKey>) {
+        accounts.update { existingAccounts ->
+            val toRemove = existingAccounts.filterKeys { it !in keepPubkeys }
+            if (toRemove.isEmpty()) {
+                existingAccounts
+            } else {
+                toRemove.values.forEach { it.scope.cancel() }
+                existingAccounts.minus(toRemove.keys)
+            }
+        }
+    }
+
     fun loadAccount(accountSettings: AccountSettings): Account =
         loadAccount(
             signer =

amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/AlwaysOnNotificationServiceManager.kt

@@ -21,8 +21,12 @@
 package com.vitorpamplona.amethyst.service.notifications
 
 import android.content.Context
+import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.accountsCache.AccountCacheState
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
 import com.vitorpamplona.quartz.utils.Log
+import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.collectLatest
@@ -40,16 +44,27 @@ import kotlinx.coroutines.launch
  * When enabled, all layers activate. When disabled, all layers deactivate.
  * The manager watches the account's alwaysOnNotificationService setting
  * and reacts to changes in real time.
+ *
+ * While enabled, every saved writable account is kept loaded in
+ * [AccountCacheState] so GiftWraps addressed to any of them (delivered via
+ * open relay subscriptions) get unwrapped by the owning account's
+ * `newNotesPreProcessor`. Without this, wraps for non-active accounts would
+ * sit in [com.vitorpamplona.amethyst.model.LocalCache] with no subscriber
+ * able to decrypt them.
  */
 class AlwaysOnNotificationServiceManager(
     private val context: Context,
     private val scope: CoroutineScope,
+    private val accountsCache: AccountCacheState,
+    private val localPreferences: LocalPreferences,
+    private val activePubKeyProvider: () -> HexKey?,
 ) {
     companion object {
         private const val TAG = "AlwaysOnNotifManager"
     }
 
     private var watchJob: Job? = null
+    private var preloadJob: Job? = null
     private var wasEnabled = false
 
     /**
@@ -76,6 +91,8 @@ class AlwaysOnNotificationServiceManager(
     fun stop() {
         watchJob?.cancel()
         watchJob = null
+        preloadJob?.cancel()
+        preloadJob = null
     }
 
     private fun enableAllLayers() {
@@ -91,6 +108,8 @@ class AlwaysOnNotificationServiceManager(
         ServiceWatchdogManager.schedule(context)
 
         // L2 (FCM) and L4 (BOOT_COMPLETED) are always active via manifest
+
+        startMultiAccountPreload()
     }
 
     private fun disableAllLayers() {
@@ -104,5 +123,46 @@ class AlwaysOnNotificationServiceManager(
 
         // L5: Cancel watchdog alarm
         ServiceWatchdogManager.cancel(context)
+
+        stopMultiAccountPreload()
+    }
+
+    /**
+     * Preloads every saved writable account into [AccountCacheState] and keeps the set
+     * in sync by observing [LocalPreferences.accountsFlow]. New accounts added while
+     * the service is enabled (login flow) are picked up automatically.
+     *
+     * Note: the first [LocalPreferences.accountsFlow] emission is `null` (lazily
+     * populated). We still call [AccountCacheState.loadAllWritableAccounts] on every
+     * emission — its suspend call to `allSavedAccounts()` triggers flow population,
+     * and subsequent [loadAccount] calls are idempotent on already-loaded accounts.
+     */
+    private fun startMultiAccountPreload() {
+        preloadJob?.cancel()
+        preloadJob =
+            scope.launch {
+                localPreferences.accountsFlow().collect {
+                    try {
+                        accountsCache.loadAllWritableAccounts(localPreferences)
+                    } catch (e: Exception) {
+                        if (e is CancellationException) throw e
+                        Log.w(TAG, "Multi-account preload failed: ${e.message}", e)
+                    }
+                }
+            }
+    }
+
+    /**
+     * Cancels the preload collector and releases every cached account except the
+     * currently active one, so users with the setting off return to single-account
+     * memory/battery footprint.
+     */
+    private fun stopMultiAccountPreload() {
+        preloadJob?.cancel()
+        preloadJob = null
+        val active = activePubKeyProvider()
+        if (active != null) {
+            accountsCache.retainOnly(setOf(active))
+        }
     }
 }