Fix credo issues

- Remove trailing whitespace from comments
- Fix long line in packet_processor.ex
- Rename is_leader? to leader? following Elixir conventions

lib/aprsme/cluster/connection_manager.ex

@@ -26,7 +26,7 @@ defmodule Aprsme.Cluster.ConnectionManager do
 
   @impl true
   def handle_info(:check_initial_state, state) do
-    if Aprsme.Cluster.LeaderElection.is_leader?() do
+    if Aprsme.Cluster.LeaderElection.leader?() do
       Logger.info("This node is the leader, starting APRS-IS connection")
       start_aprs_connection()
       {:noreply, %{state | connection_started: true}}

lib/aprsme/cluster/leader_election.ex

@@ -16,8 +16,8 @@ defmodule Aprsme.Cluster.LeaderElection do
     GenServer.start_link(__MODULE__, opts, name: __MODULE__)
   end
 
-  def is_leader? do
+  def leader? do
-    GenServer.call(__MODULE__, :is_leader?)
+    GenServer.call(__MODULE__, :leader?)
   end
 
   def current_leader do
@@ -148,7 +148,7 @@ defmodule Aprsme.Cluster.LeaderElection do
   end
 
   @impl true
-  def handle_call(:is_leader?, _from, state) do
+  def handle_call(:leader?, _from, state) do
     {:reply, state.is_leader, state}
   end
 

lib/aprsme/cluster/packet_distributor.ex

@@ -12,7 +12,7 @@ defmodule Aprsme.Cluster.PacketDistributor do
     # Only distribute if clustering is enabled and we're the leader
     cluster_enabled = Application.get_env(:aprsme, :cluster_enabled, false)
 
-    if cluster_enabled and Aprsme.Cluster.LeaderElection.is_leader?() do
+    if cluster_enabled and Aprsme.Cluster.LeaderElection.leader?() do
       # Broadcast to all nodes including self
       Phoenix.PubSub.broadcast(
         Aprsme.PubSub,

lib/aprsme/cluster/packet_receiver.ex

@@ -27,7 +27,7 @@ defmodule Aprsme.Cluster.PacketReceiver do
   @impl true
   def handle_info({:distributed_packet, packet}, state) do
     # Only process if we're not the leader (leader already processed locally)
-    if !Aprsme.Cluster.LeaderElection.is_leader?() do
+    if !Aprsme.Cluster.LeaderElection.leader?() do
       PacketDistributor.handle_distributed_packet({:distributed_packet, packet})
     end
 

lib/aprsme_web/live/map_live/packet_processor.ex

@@ -69,7 +69,8 @@ defmodule AprsmeWeb.MapLive.PacketProcessor do
           # Significant movement detected (more than 50 meters), update the marker
           handle_valid_postgres_packet(packet, lat, lon, socket)
         else
-          # Just GPS drift (less than 50 meters) or invalid coordinates, update the packet data but don't send visual update
+          # Just GPS drift (less than 50 meters) or invalid coordinates,
+          # update the packet data but don't send visual update
           new_visible_packets = Map.put(socket.assigns.visible_packets, callsign_key, packet)
           assign(socket, :visible_packets, new_visible_packets)
         end

test/aprsme/cluster/leader_election_test.exs

@@ -58,7 +58,7 @@ defmodule Aprsme.Cluster.LeaderElectionTest do
     end
 
     test "elects itself as leader when clustering is disabled", %{pid: _pid} do
-      assert LeaderElection.is_leader?() == true
+      assert LeaderElection.leader?() == true
       assert LeaderElection.current_leader() == node()
     end
 
@@ -67,7 +67,7 @@ defmodule Aprsme.Cluster.LeaderElectionTest do
     end
   end
 
-  describe "is_leader?/0" do
+  describe "leader?/0" do
     setup do
       Application.put_env(:aprsme, :cluster_enabled, false)
       {:ok, _pid} = LeaderElection.start_link([])
@@ -76,7 +76,7 @@ defmodule Aprsme.Cluster.LeaderElectionTest do
     end
 
     test "returns leadership status" do
-      assert is_boolean(LeaderElection.is_leader?())
+      assert is_boolean(LeaderElection.leader?())
     end
   end
 
@@ -137,7 +137,7 @@ defmodule Aprsme.Cluster.LeaderElectionTest do
       Process.sleep(200)
 
       # Verify it's the leader
-      assert LeaderElection.is_leader?() == true
+      assert LeaderElection.leader?() == true
 
       # Stop the process
       GenServer.stop(pid)
@@ -151,13 +151,13 @@ defmodule Aprsme.Cluster.LeaderElectionTest do
       {:ok, _pid} = LeaderElection.start_link([])
 
       # Initial state - might not be leader yet
-      _initial_leader = LeaderElection.is_leader?()
+      _initial_leader = LeaderElection.leader?()
 
       # Wait for periodic check
       Process.sleep(6000)
 
       # Should still be able to query leadership
-      current_leader = LeaderElection.is_leader?()
+      current_leader = LeaderElection.leader?()
       assert is_boolean(current_leader)
 
       # In non-clustered mode, should become leader
@@ -210,7 +210,7 @@ defmodule Aprsme.Cluster.LeaderElectionTest do
       Process.sleep(500)
 
       # Should have taken over leadership
-      assert LeaderElection.is_leader?() == true
+      assert LeaderElection.leader?() == true
     end
   end
 
@@ -232,7 +232,7 @@ defmodule Aprsme.Cluster.LeaderElectionTest do
       Process.sleep(3000)
 
       # Should eventually attempt election
-      assert is_boolean(LeaderElection.is_leader?())
+      assert is_boolean(LeaderElection.leader?())
     end
   end