feat(peers): success toasts for ban/unban/clear + confirm the bulk Clear-All

Peer ban actions only toasted on failure; success was silent. Added success
toasts for ban/unban/clear-all, and the bulk "Clear All Bans" now takes a
confirming second click (per-row unban stays one-click). The setban/clearbanned
RPC calls are unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app_network.cpp

@@ -3772,7 +3772,7 @@ void App::banPeer(const std::string& ip, int duration_seconds)
         }
         return [this, err]() {
             if (!err.empty()) ui::Notifications::instance().error(std::string(TR("toast_ban_failed")) + util::friendlyRpcError(err));
-            else refreshPeerInfo();
+            else { ui::Notifications::instance().success(TR("toast_peer_banned")); refreshPeerInfo(); }
         };
     });
 }
@@ -3790,7 +3790,7 @@ void App::unbanPeer(const std::string& ip)
         }
         return [this, err]() {
             if (!err.empty()) ui::Notifications::instance().error(std::string(TR("toast_unban_failed")) + util::friendlyRpcError(err));
-            else refreshPeerInfo();
+            else { ui::Notifications::instance().success(TR("toast_peer_unbanned")); refreshPeerInfo(); }
         };
     });
 }
@@ -3809,6 +3809,7 @@ void App::clearBans()
         return [this, err]() {
             if (!err.empty()) { ui::Notifications::instance().error(std::string(TR("toast_clear_bans_failed")) + util::friendlyRpcError(err)); return; }
             state_.banned_peers.clear();
+            ui::Notifications::instance().success(TR("toast_bans_cleared"));
             refreshPeerInfo();
         };
     });