refactor: JI_* a Ji:: i JG_* a Jg::

source/core/jail/jgame.cpp

@@ -2,7 +2,7 @@
 
 namespace {
 
-    bool quitting = false;
+    bool is_quitting = false;
     Uint32 update_ticks = 0;
     Uint32 update_time = 0;
     Uint32 cycle_counter = 0;
@@ -10,29 +10,29 @@ namespace {
 
 }  // namespace
 
-void JG_Init() {
+void Jg::init() {
     SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO);
     update_time = SDL_GetTicks();
     last_delta_time = update_time;
 }
 
-void JG_Finalize() {
+void Jg::finalize() {
     SDL_Quit();
 }
 
-void JG_QuitSignal() {
-    quitting = true;
+void Jg::quitSignal() {
+    is_quitting = true;
 }
 
-auto JG_Quitting() -> bool {
-    return quitting;
+auto Jg::quitting() -> bool {
+    return is_quitting;
 }
 
-void JG_SetUpdateTicks(Uint32 milliseconds) {
+void Jg::setUpdateTicks(Uint32 milliseconds) {
     update_ticks = milliseconds;
 }
 
-auto JG_ShouldUpdate() -> bool {
+auto Jg::shouldUpdate() -> bool {
     const Uint32 now = SDL_GetTicks();
     if (now - update_time > update_ticks) {
         update_time = now;
@@ -40,16 +40,16 @@ auto JG_ShouldUpdate() -> bool {
         return true;
     }
     // No toca update — retornem false sense més. Des de Phase B.2 ja no
-    // hi ha fibers: cap caller fa spin-waits (`while (!JG_ShouldUpdate())`)
+    // hi ha fibers: cap caller fa spin-waits (`while (!Jg::shouldUpdate())`)
     // i el Director pren el control del main loop frame a frame.
     return false;
 }
 
-auto JG_GetCycleCounter() -> Uint32 {
+auto Jg::getCycleCounter() -> Uint32 {
     return cycle_counter;
 }
 
-auto JG_GetDeltaMs() -> Uint32 {
+auto Jg::getDeltaMs() -> Uint32 {
     const Uint32 now = SDL_GetTicks();
     const Uint32 delta = now - last_delta_time;
     last_delta_time = now;