Lint: rename de métodos privados (camelBack + traducción al inglés)

Tanda grande de identifier-naming: 47 métodos privados pasan de
snake_case (en su mayoría catalán/spanish) a camelBack inglés. Solo
afecta a sus archivos hpp+cpp; ningún símbolo cruza fichero (los
públicos quedan para una pasada manual con VS Code).

Renames por clase:

- ShapeLoader: resolve_path → resolvePath.
- VectorText: load_charset → loadCharset, get_shape_filename →
  getShapeFilename.
- Shape: starts_with → startsWith (cuidado de no tocar
  std::string::starts_with que también usaba), extract_value →
  extractValue, parse_center → parseCenter, parse_points → parsePoints.
- Starfield: inicialitzar_estrella → initStar, fora_area →
  isOutsideArea, calcular_escala → computeScale, calcular_brightness →
  computeBrightness.
- TitleScene: actualitzar_animacio_logo → updateLogoAnimation,
  inicialitzar_titol → initTitle.
- LogoScene: inicialitzar_lletres → initLetters, actualitzar_explosions
  → updateExplosions, canviar_estat → changeState,
  totes_lletres_completes → allLettersComplete.
- SpawnController: generar_spawn_events → generateSpawnEvents,
  seleccionar_tipus_aleatori → selectRandomType, spawn_enemic →
  spawnEnemy, aplicar_multiplicadors → applyMultipliers.
- ShipAnimator: actualitzar_entering/floating/exiting →
  updateEntering/Floating/Exiting, configurar_nau_p1/p2 →
  configureShipP1/P2, calcular_posicio_fora_pantalla →
  computeOffscreenPosition.
- GameScene: dibuixar_marges → drawMargins, dibuixar_marcador →
  drawScoreboard, disparar_bala → fireBullet, obtenir_punt_spawn →
  getSpawnPoint, unir_jugador → joinPlayer, dibuixar_continue →
  drawContinue, dibuixar_missatge_stage → drawStageMessage.
- StageLoader: parse_metadata/stage/spawn_config/distribution/multipliers/
  spawn_mode → parseMetadata/Stage/SpawnConfig/Distribution/Multipliers/
  SpawnMode, validar_config → validateConfig.
- StageManager: canviar_estat → changeState,
  processar_init_hud/level_start/playing/level_completed →
  processInitHud/LevelStart/Playing/LevelCompleted, carregar_stage →
  loadStage.

Métodos públicos y funciones libres (cross-file) quedan a propósito sin
tocar — los renombrará el usuario con la herramienta de rename de VS Code.

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

source/game/title/ship_animator.cpp

@@ -25,12 +25,12 @@ void ShipAnimator::init() {
     // Configurar ship P1
     ships_[0].player_id = 1;
     ships_[0].shape = forma_p1;
-    configurar_nau_p1(ships_[0]);
+    configureShipP1(ships_[0]);
 
     // Configurar ship P2
     ships_[1].player_id = 2;
     ships_[1].shape = forma_p2;
-    configurar_nau_p2(ships_[1]);
+    configureShipP2(ships_[1]);
 }
 
 void ShipAnimator::update(float delta_time) {
@@ -42,13 +42,13 @@ void ShipAnimator::update(float delta_time) {
 
         switch (ship.state) {
             case ShipState::ENTERING:
-                actualitzar_entering(ship, delta_time);
+                updateEntering(ship, delta_time);
                 break;
             case ShipState::FLOATING:
-                actualitzar_floating(ship, delta_time);
+                updateFloating(ship, delta_time);
                 break;
             case ShipState::EXITING:
-                actualitzar_exiting(ship, delta_time);
+                updateExiting(ship, delta_time);
                 break;
         }
     }
@@ -79,14 +79,14 @@ void ShipAnimator::start_entry_animation() {
     // Configurar ship P1 para l'animación de entrada
     ships_[0].state = ShipState::ENTERING;
     ships_[0].state_time = 0.0F;
-    ships_[0].initial_position = calcular_posicio_fora_pantalla(CLOCK_8_ANGLE);
+    ships_[0].initial_position = computeOffscreenPosition(CLOCK_8_ANGLE);
     ships_[0].current_position = ships_[0].initial_position;
     ships_[0].current_scale = ships_[0].initial_scale;
 
     // Configurar ship P2 para l'animación de entrada
     ships_[1].state = ShipState::ENTERING;
     ships_[1].state_time = 0.0F;
-    ships_[1].initial_position = calcular_posicio_fora_pantalla(CLOCK_4_ANGLE);
+    ships_[1].initial_position = computeOffscreenPosition(CLOCK_4_ANGLE);
     ships_[1].current_position = ships_[1].initial_position;
     ships_[1].current_scale = ships_[1].initial_scale;
 }
@@ -167,7 +167,7 @@ auto ShipAnimator::is_animation_complete() const -> bool {
 }
 
 // Métodos de animación (stubs)
-void ShipAnimator::actualitzar_entering(TitleShip& ship, float delta_time) {
+void ShipAnimator::updateEntering(TitleShip& ship, float delta_time) {
     using namespace Defaults::Title::Ships;
 
     ship.state_time += delta_time;
@@ -202,7 +202,7 @@ void ShipAnimator::actualitzar_entering(TitleShip& ship, float delta_time) {
     }
 }
 
-void ShipAnimator::actualitzar_floating(TitleShip& ship, float delta_time) {
+void ShipAnimator::updateFloating(TitleShip& ship, float delta_time) {
     using namespace Defaults::Title::Ships;
 
     // Actualitzar time i fase de oscil·lació
@@ -221,7 +221,7 @@ void ShipAnimator::actualitzar_floating(TitleShip& ship, float delta_time) {
     ship.current_scale = ship.target_scale;
 }
 
-void ShipAnimator::actualitzar_exiting(TitleShip& ship, float delta_time) {
+void ShipAnimator::updateExiting(TitleShip& ship, float delta_time) {
     using namespace Defaults::Title::Ships;
 
     ship.state_time += delta_time;
@@ -250,7 +250,7 @@ void ShipAnimator::actualitzar_exiting(TitleShip& ship, float delta_time) {
 }
 
 // Configuración
-void ShipAnimator::configurar_nau_p1(TitleShip& ship) {
+void ShipAnimator::configureShipP1(TitleShip& ship) {
     using namespace Defaults::Title::Ships;
 
     // Estat inicial: FLOATING (per test estàtic)
@@ -261,7 +261,7 @@ void ShipAnimator::configurar_nau_p1(TitleShip& ship) {
     ship.target_position = {.x = P1_TARGET_X(), .y = P1_TARGET_Y()};
 
     // Calcular posición inicial (fuera de pantalla)
-    ship.initial_position = calcular_posicio_fora_pantalla(CLOCK_8_ANGLE);
+    ship.initial_position = computeOffscreenPosition(CLOCK_8_ANGLE);
     ship.current_position = ship.initial_position;  // Començar fuera de pantalla
 
     // Escales
@@ -285,7 +285,7 @@ void ShipAnimator::configurar_nau_p1(TitleShip& ship) {
     ship.visible = true;
 }
 
-void ShipAnimator::configurar_nau_p2(TitleShip& ship) {
+void ShipAnimator::configureShipP2(TitleShip& ship) {
     using namespace Defaults::Title::Ships;
 
     // Estat inicial: FLOATING (per test estàtic)
@@ -296,7 +296,7 @@ void ShipAnimator::configurar_nau_p2(TitleShip& ship) {
     ship.target_position = {.x = P2_TARGET_X(), .y = P2_TARGET_Y()};
 
     // Calcular posición inicial (fuera de pantalla)
-    ship.initial_position = calcular_posicio_fora_pantalla(CLOCK_4_ANGLE);
+    ship.initial_position = computeOffscreenPosition(CLOCK_4_ANGLE);
     ship.current_position = ship.initial_position;  // Començar fuera de pantalla
 
     // Escales
@@ -320,7 +320,7 @@ void ShipAnimator::configurar_nau_p2(TitleShip& ship) {
     ship.visible = true;
 }
 
-auto ShipAnimator::calcular_posicio_fora_pantalla(float angle_rellotge) const -> Vec2 {
+auto ShipAnimator::computeOffscreenPosition(float angle_rellotge) const -> Vec2 {
     using namespace Defaults::Title::Ships;
 
     // Convertir angle del rellotge a radians (per exemple: 240° per clock 8)