refactor: fase 3 — Text::bitmap_ a std::vector<Uint8>

- bitmap_: Uint8* (owning, free'd al destructor) → std::vector<Uint8>
- loadBitmap copia des del buffer de LoadGif i fa free(pixels) de
  l'intermedi (gif.h usa malloc internament)
- ~Text() eliminat: regla 0 aplicada (vector es destrueix sol)
- Les 4 comprovacions !bitmap_ → bitmap_.empty()

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

source/core/rendering/text.cpp

@@ -19,10 +19,6 @@ Text::Text(const char* fnt_file, const char* gif_file) {
     loadFont(fnt_file);
 }
 
-Text::~Text() {
-    if (bitmap_) free(bitmap_);
-}
-
 // --- UTF-8 ---
 
 auto Text::nextCodepoint(const char*& ptr) -> uint32_t {
@@ -146,7 +142,8 @@ void Text::loadBitmap(const char* gif_file) {
 
     bitmap_width_ = w;
     bitmap_height_ = h;
-    bitmap_ = pixels;
+    bitmap_.assign(pixels, pixels + (static_cast<size_t>(w) * h));
+    free(pixels);  // LoadGif usa malloc internament
 
     std::cout << "Text: bitmap loaded " << w << "x" << h << '\n';
 }
@@ -154,7 +151,7 @@ void Text::loadBitmap(const char* gif_file) {
 // --- Renderitzat ---
 
 void Text::draw(Uint32* pixel_data, int x, int y, const char* text, Uint32 color) const {
-    if (!bitmap_ || !pixel_data) return;
+    if (bitmap_.empty() || !pixel_data) return;
 
     const char* ptr = text;
     int cursor_x = x;
@@ -207,7 +204,7 @@ void Text::drawCentered(Uint32* pixel_data, int y, const char* text, Uint32 colo
 }
 
 void Text::drawClipped(Uint32* pixel_data, int x, int y, const char* text, Uint32 color, int clip_x_min, int clip_x_max, int clip_y_min, int clip_y_max) const {
-    if (!bitmap_ || !pixel_data) return;
+    if (bitmap_.empty() || !pixel_data) return;
 
     // Descart ràpid si el glifo sencer cau fora verticalment
     if (y + box_height_ <= clip_y_min || y >= clip_y_max) return;
@@ -262,7 +259,7 @@ void Text::drawClipped(Uint32* pixel_data, int x, int y, const char* text, Uint3
 }
 
 void Text::drawMono(Uint32* pixel_data, int x, int y, const char* text, Uint32 color, int cell_w) const {
-    if (!bitmap_ || !pixel_data) return;
+    if (bitmap_.empty() || !pixel_data) return;
 
     const char* ptr = text;
     int cursor_x = x;
@@ -308,7 +305,7 @@ void Text::drawMono(Uint32* pixel_data, int x, int y, const char* text, Uint32 c
 }
 
 void Text::drawMonoDigits(Uint32* pixel_data, int x, int y, const char* text, Uint32 color, int digit_cell_w) const {
-    if (!bitmap_ || !pixel_data) return;
+    if (bitmap_.empty() || !pixel_data) return;
 
     const char* ptr = text;
     int cursor_x = x;

source/core/rendering/text.hpp

@@ -5,11 +5,11 @@
 #include <cstdint>
 #include <string>
 #include <unordered_map>
+#include <vector>
 
 class Text {
    public:
     Text(const char* fnt_file, const char* gif_file);
-    ~Text();
 
     // Pinta texto sobre un buffer ARGB de 320x200
     void draw(Uint32* pixel_data, int x, int y, const char* text, Uint32 color) const;
@@ -46,7 +46,7 @@ class Text {
     int cell_spacing_{0};
     int row_spacing_{0};
 
-    Uint8* bitmap_{nullptr};  // píxels 8-bit del GIF de la font
+    std::vector<Uint8> bitmap_;  // píxels 8-bit del GIF de la font
     int bitmap_width_{0};
     int bitmap_height_{0};