Implement robust logging with flexi_logger and update CI to verify logs

src/combat.rs

@@ -69,6 +69,8 @@ pub fn resolve_combat_tick(
             ));
 
             if new_npc_hp <= 0 {
+                let player_name = state.players.get(&player_id).map(|c| c.player.name.clone()).unwrap_or_else(|| "Unknown".into());
+                log::info!("Combat: Player '{}' (ID {}) killed NPC '{}' ({})", player_name, player_id, npc_template.name, npc_id);
                 if let Some(inst) = state.npc_instances.get_mut(&npc_id) {
                     inst.alive = false;
                     inst.hp = 0;
@@ -351,7 +353,9 @@ pub fn player_death_respawn(player_id: usize, state: &mut GameState) -> String {
         .players
         .get(&player_id)
         .map(|c| c.player.name.clone())
-        .unwrap_or_default();
+        .unwrap_or_else(|| "Unknown".into());
+
+    log::info!("Combat: Player '{}' (ID {}) died and respawned at {}", player_name, player_id, spawn_room);
 
     if let Some(conn) = state.players.get_mut(&player_id) {
         conn.player.stats.hp = conn.player.stats.max_hp;