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/debug_config.cpp

@@ -3,11 +3,11 @@
 #include <exception>
 #include <filesystem>
 #include <fstream>
-#include <iostream>
 #include <sstream>
 #include <string>
 
 #include "external/fkyaml_node.hpp"
+#include "utils/log.hpp"
 
 namespace DebugConfig {
 
@@ -53,12 +53,12 @@ namespace DebugConfig {
             if (!yaml.contains("start_scene")) { return StartScene::GAME; }
             const auto RAW = yaml["start_scene"].get_value<std::string>();
             if (!isKnown(RAW)) {
-                std::cerr << "debug.yaml: start_scene \"" << RAW << "\" invàlid, arrancant a GAME\n";
+                Log::warn("debug.yaml", "start_scene \"{}\" invàlid, arrancant a GAME", RAW);
                 return StartScene::GAME;
             }
             return fromName(RAW);
         } catch (const std::exception& e) {
-            std::cerr << "debug.yaml: error parsejant: " << e.what() << " — arrancant a GAME\n";
+            Log::error("debug.yaml", "error parsejant: {} — arrancant a GAME", e.what());
             return StartScene::GAME;
         }
     }
@@ -72,7 +72,7 @@ namespace DebugConfig {
         }
         const auto CONTENT = readFile(file_path);
         if (CONTENT.empty()) {
-            std::cerr << "debug.yaml: fitxer buit a " << file_path << ", arrancant a GAME\n";
+            Log::warn("debug.yaml", "fitxer buit a {}, arrancant a GAME", file_path);
             return StartScene::GAME;
         }
         return parseStartScene(CONTENT);
@@ -85,12 +85,12 @@ namespace DebugConfig {
             if (!yaml.contains("starting_players")) { return StartingPlayers::BOTH; }
             const auto RAW = yaml["starting_players"].get_value<std::string>();
             if (!isKnownPlayers(RAW)) {
-                std::cerr << "debug.yaml: starting_players \"" << RAW << "\" invàlid, arrancant amb BOTH\n";
+                Log::warn("debug.yaml", "starting_players \"{}\" invàlid, arrancant amb BOTH", RAW);
                 return StartingPlayers::BOTH;
             }
             return playersFromName(RAW);
         } catch (const std::exception& e) {
-            std::cerr << "debug.yaml: error parsejant starting_players: " << e.what() << " — arrancant amb BOTH\n";
+            Log::error("debug.yaml", "error parsejant starting_players: {} — arrancant amb BOTH", e.what());
             return StartingPlayers::BOTH;
         }
     }
@@ -110,7 +110,7 @@ namespace DebugConfig {
             if (!yaml.contains("starting_level")) { return std::nullopt; }
             const auto& sl = yaml["starting_level"];
             if (!sl.contains("pyramid") || !sl.contains("room")) {
-                std::cerr << "debug.yaml: starting_level necessita els camps `pyramid` i `room` — ignorat\n";
+                Log::warn("debug.yaml", "starting_level necessita els camps `pyramid` i `room` — ignorat");
                 return std::nullopt;
             }
             return StartingLevel{
@@ -118,7 +118,7 @@ namespace DebugConfig {
                 .room = sl["room"].get_value<int>(),
             };
         } catch (const std::exception& e) {
-            std::cerr << "debug.yaml: error parsejant starting_level: " << e.what() << " — ignorat\n";
+            Log::error("debug.yaml", "error parsejant starting_level: {} — ignorat", e.what());
             return std::nullopt;
         }
     }
@@ -162,7 +162,7 @@ namespace DebugConfig {
         if (std::filesystem::exists(file_path, error)) { return; }
         std::ofstream file(file_path);
         if (!file) {
-            std::cerr << "debug.yaml: no s'ha pogut crear " << file_path << '\n';
+            Log::error("debug.yaml", "no s'ha pogut crear {}", file_path);
             return;
         }
         file << "# debug.yaml — ajust personal de dev (no versionat).\n";
@@ -173,7 +173,7 @@ namespace DebugConfig {
         file << "#                            clau, comença a la primera (P1-R1).\n";
         file << "start_scene: GAME\n";
         file << "starting_players: BOTH\n";
-        std::cout << "debug.yaml: creat a " << file_path << " amb start_scene=GAME starting_players=BOTH\n";
+        Log::info("debug.yaml", "creat a {} amb start_scene=GAME starting_players=BOTH", file_path);
     }
 
 }  // namespace DebugConfig