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Also refactor damus app usage to only pass in things that we need in views.

Signed-off-by: William Casarin <jb55@jb55.com>

src/account_manager.rs

@@ -1,6 +1,6 @@
 use std::cmp::Ordering;
 
-use enostr::Keypair;
+use enostr::{FilledKeypair, Keypair};
 
 use crate::key_storage::{KeyStorage, KeyStorageResponse, KeyStorageType};
 pub use crate::user_account::UserAccount;
@@ -88,6 +88,12 @@ impl AccountManager {
         self.currently_selected_account
     }
 
+    pub fn selected_or_first_nsec(&self) -> Option<FilledKeypair<'_>> {
+        self.get_selected_account()
+            .and_then(|kp| kp.to_full())
+            .or_else(|| self.accounts.iter().find_map(|a| a.to_full()))
+    }
+
     pub fn get_selected_account(&self) -> Option<&UserAccount> {
         if let Some(account_index) = self.currently_selected_account {
             if let Some(account) = self.get_account(account_index) {