check existence for visibility of addFavAction/addToAb

Signed-off-by: 21pages <pages21@163.com>

src/flutter_ffi.rs

@@ -726,6 +726,10 @@ pub fn main_peer_has_password(id: String) -> bool {
     peer_has_password(id)
 }
 
+pub fn main_is_in_recent_peers(id: String) -> bool {
+    PeerConfig::peers().iter().any(|e| e.0 == id)
+}
+
 pub fn main_load_recent_peers() {
     if !config::APP_DIR.read().unwrap().is_empty() {
         let peers: Vec<HashMap<&str, String>> = PeerConfig::peers()