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/core/rendering/gif.cpp

@@ -1,10 +1,11 @@
 #include "core/rendering/gif.hpp"
 
 #include <cstring>
-#include <iostream>
 #include <stdexcept>
 #include <string>
 
+#include "utils/log.hpp"
+
 namespace GIF {
 
     namespace {
@@ -111,7 +112,7 @@ namespace GIF {
         while (cur_code != -1) {
             out[dictionary[cur_code].len - 1] = dictionary[cur_code].byte;
             if (dictionary[cur_code].prev == cur_code) {
-                std::cerr << "Internal error; self-reference detected." << '\n';
+                Log::error("GIF", "internal error; self-reference detected.");
                 throw std::runtime_error("Internal error in decompress: self-reference");
             }
             cur_code = dictionary[cur_code].prev;
@@ -155,8 +156,7 @@ namespace GIF {
 
             if (prev > -1 && code_length < LZW_MAX_CODE_LENGTH) {
                 if (code > dictionary_ind) {
-                    std::cerr << "code = " << std::hex << code
-                              << ", but dictionary_ind = " << dictionary_ind << '\n';
+                    Log::error("GIF", "code = {:x}, but dictionary_ind = {}", code, dictionary_ind);
                     throw std::runtime_error("LZW error: code exceeds dictionary_ind.");
                 }
 
@@ -167,8 +167,7 @@ namespace GIF {
 
             // Verifica que 'code' sea un índice válido antes de usarlo.
             if (code < 0 || static_cast<size_t>(code) >= dictionary.size()) {
-                std::cerr << "Invalid LZW code " << code
-                          << ", dictionary size " << dictionary.size() << '\n';
+                Log::error("GIF", "invalid LZW code {}, dictionary size {}", code, dictionary.size());
                 throw std::runtime_error("LZW error: invalid code encountered");
             }
 
@@ -287,7 +286,7 @@ namespace GIF {
             } else if (block_type == IMAGE_DESCRIPTOR) {
                 return processImageDescriptor(buffer);
             } else {
-                std::cerr << "Unrecognized block type " << std::hex << static_cast<int>(block_type) << '\n';
+                Log::error("GIF", "unrecognized block type {:x}", static_cast<int>(block_type));
                 return std::vector<uint8_t>{};
             }
             block_type = *buffer++;