refactor(log): migra els subsistemes restants i elimina iostream

Acaba la migració dels std::cout/cerr a Log::*:

- core/locale, core/ui/ui_config, core/rendering/{screen,text,gif,
  surface, sprite/animated_sprite, sdl3gpu/*}.
- game/{options, debug_config, editor/editor_config, levels/level_manager,
  map/{map,tilemap,paint_layer}, entities/entity_manager_loadlevel}.

Severitats coherents: warns per a configs absents amb fallback,
errors per a YAML malformat o E/S fallida, infos per a estats.

Resultat:
- 0 occurrences de std::cout/std::cerr a source/.
- Cap #include <iostream> orfà (eliminat de surface.cpp).
- Output funcional idèntic al històric; AEE_LOG filtra (ex.
  `AEE_LOG=warn` només mostra warnings, `AEE_LOG=*:warn,Tag:info`
  combina globals i overrides).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

source/game/entities/entity_manager_loadlevel.cpp

@@ -5,7 +5,6 @@
 // stand-alone) enllacen `entity_manager.cpp` sense arrossegar aquest fitxer.
 
 #include <filesystem>
-#include <iostream>
 #include <memory>
 #include <string>
 #include <utility>
@@ -22,6 +21,7 @@
 #include "game/entities/player.hpp"
 #include "game/map/map.hpp"
 #include "utils/defaults.hpp"
+#include "utils/log.hpp"
 
 // Render centralitzat al manager per confinar la dependència cap a
 // `Surface`. Les entitats exposen `getSurface()` + `getPixelRect()` i el
@@ -237,12 +237,12 @@ namespace {
         try {
             tmpl = EntityLoader::loadTemplate(type);
         } catch (const std::exception& e) {
-            std::cerr << "EntityManager: " << e.what() << '\n';
+            Log::error("EntityManager", "{}", e.what());
             return nullptr;
         }
         auto entity = EntityFactory::instance().create(type, tmpl);
         if (entity == nullptr) {
-            std::cerr << "EntityManager: tipus desconegut '" << type << "'\n";
+            Log::error("EntityManager", "tipus desconegut '{}'", type);
             return nullptr;
         }
         sprite_out = readSpriteInfo(tmpl, type);
@@ -267,7 +267,7 @@ namespace {
 namespace {
     auto placeSarcophagus(EntityManager& manager, std::unique_ptr<Entity> entity, const SpriteInfo& sprite, const fkyaml::node& spawn) -> bool {
         if (!spawn.contains("sarc_position")) {
-            std::cerr << "EntityManager: sarcophagus sense sarc_position\n";
+            Log::error("EntityManager", "sarcophagus sense sarc_position");
             return false;
         }
         const auto& sp = spawn["sarc_position"];
@@ -304,7 +304,7 @@ namespace {
         // un `Sarcophagus`. Usant el retorn de `release` al ctor del nou
         // `unique_ptr` evitem el lint `bugprone-unused-return-value`.
         if (dynamic_cast<Sarcophagus*>(entity.get()) == nullptr) {
-            std::cerr << "EntityManager: la factory no ha creat un Sarcophagus\n";
+            Log::error("EntityManager", "la factory no ha creat un Sarcophagus");
             return false;
         }
         std::unique_ptr<Sarcophagus> sarc(static_cast<Sarcophagus*>(entity.release()));
@@ -323,7 +323,7 @@ namespace {
     // queden tapats — comportament intencional.
     auto placeDoor(EntityManager& manager, std::unique_ptr<Entity> entity, const SpriteInfo& sprite) -> bool {
         if (Map::door_col <= 0 || Map::tile_size <= 0) {
-            std::cerr << "EntityManager: door requereix `geometry.door_col` definit al mapa\n";
+            Log::error("EntityManager", "door requereix `geometry.door_col` definit al mapa");
             return false;
         }
         const float CENTER_X = static_cast<float>((Map::door_col * Map::tile_size) + Map::tilemap_origin_x) + (static_cast<float>(Map::tile_size) / 2.0F);
@@ -343,7 +343,7 @@ namespace {
 
     auto placeGeneric(EntityManager& manager, std::unique_ptr<Entity> entity, const std::string& type, const SpriteInfo& sprite, const std::string& anchor, const fkyaml::node& spawn) -> bool {
         if (!spawn.contains("position")) {
-            std::cerr << "EntityManager: " << type << " sense position\n";
+            Log::error("EntityManager", "{} sense position", type);
             return false;
         }
         const auto& p = spawn["position"];
@@ -444,10 +444,8 @@ void EntityManager::loadFromLevel(const std::string& level_yaml_path) {
         ++decal_broadcast;
     }
     if (decal_broadcast > 0) {
-        std::cout << "EntityManager: " << decal_broadcast
-                  << " tile_painted broadcast inicial (decals de sòl)\n";
+        Log::info("EntityManager", "{} tile_painted broadcast inicial (decals de sòl)", decal_broadcast);
     }
 
-    std::cout << "EntityManager: " << LOADED << " entitats carregades des de "
-              << level_yaml_path << '\n';
+    Log::info("EntityManager", "{} entitats carregades des de {}", LOADED, level_yaml_path);
 }