fix: track KeyPackage published status and subscribe to own key packages

The publish KeyPackage button was always active because the app didn't
track whether a key package had already been published. This adds:

- hasActiveKeyPackages() to KeyPackageRotationManager and MarmotManager
- hasPublishedKeyPackage() to Account, checking both in-memory bundles
  and the local cache for existing kind:30443 events
- Own key package filter in MarmotSubscriptionManager and the EOSE
  manager so previously published key packages are downloaded from
  relays on app restart
- UI feedback: primary-colored key icon when published, contextual
  empty-state message, and a spinner during publishing

https://claude.ai/code/session_01BVe7aSEWd2KLi5Ks6RZkcc

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/marmot/MarmotSubscriptionManager.kt

@@ -140,6 +140,13 @@ class MarmotSubscriptionManager(
             MarmotFilters.giftWrapsForUser(userPubKey)
         }
 
+    /**
+     * Build a filter for the current user's own KeyPackages (kind:30443).
+     * Used to discover previously published KeyPackages on relay connect/reconnect,
+     * so the app can track whether a KeyPackage has already been published.
+     */
+    fun ownKeyPackageFilter(): Filter = MarmotFilters.keyPackagesByAuthor(userPubKey)
+
     /**
      * Build a KeyPackage filter for a specific user.
      * Used on-demand when inviting a user to a group.
@@ -166,6 +173,7 @@ class MarmotSubscriptionManager(
         val filters = mutableListOf<Filter>()
         filters.addAll(activeGroupFilters())
         filters.add(giftWrapFilter())
+        filters.add(ownKeyPackageFilter())
         return filters
     }
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/marmot/mip00KeyPackages/KeyPackageRotationManager.kt

@@ -154,6 +154,12 @@ class KeyPackageRotationManager {
      */
     fun needsRotation(): Boolean = pendingRotations.isNotEmpty()
 
+    /**
+     * Check if there are any active (non-consumed) KeyPackage bundles.
+     * Returns true if at least one slot has been generated and not yet consumed.
+     */
+    fun hasActiveKeyPackages(): Boolean = activeBundles.isNotEmpty()
+
     /**
      * Rotate a consumed slot: generate a new KeyPackage for the same d-tag.
      *