Add exit-confirm modal (fullscreen dim, centered P2 text) and keyboard shortcuts

Add an in-game exit confirmation modal for Playing state: ESC opens modal and pauses the game; YES resets and returns to Menu; NO hides modal and resumes.
Draw a full-window translucent dim background (reset viewport) so overlay covers any window size / fullscreen.
Use PressStart2P (pixel P2) font for all modal text and center title/body/button labels using measured text widths.
Add FontAtlas::measure(...) to accurately measure text sizes (used for proper centering).
Ensure popup rendering and mouse hit-testing use the same logical/content-local coordinate math so visuals and clicks align.
Add keyboard shortcuts for modal (Enter = confirm, Esc = cancel) and suppress other gameplay input while modal is active.
Add helper scripts for debug build+run: build-debug-and-run.ps1 and build-debug-and-run.bat.
Minor fixes to related rendering & state wiring; verified Debug build completes and modal behavior in runtime.

src/graphics/Font.cpp

@@ -19,3 +19,18 @@ void FontAtlas::draw(SDL_Renderer* r, float x, float y, const std::string& text,
     if (tex) { SDL_FRect dst{ x, y, (float)surf->w, (float)surf->h }; SDL_RenderTexture(r, tex, nullptr, &dst); SDL_DestroyTexture(tex); }
     SDL_DestroySurface(surf);
 }
+
+void FontAtlas::measure(const std::string& text, float scale, int& outW, int& outH) {
+    outW = 0; outH = 0;
+    if (scale <= 0) return;
+    int pt = int(baseSize * scale);
+    if (pt < 1) pt = 1;
+    TTF_Font* f = getSized(pt);
+    if (!f) return;
+    // Use render-to-surface measurement to avoid dependency on specific TTF_* measurement API variants
+    SDL_Color dummy = {255,255,255,255};
+    SDL_Surface* surf = TTF_RenderText_Blended(f, text.c_str(), text.length(), dummy);
+    if (!surf) return;
+    outW = surf->w; outH = surf->h;
+    SDL_DestroySurface(surf);
+}

src/graphics/Font.h

@@ -10,6 +10,8 @@ public:
     bool init(const std::string& path, int basePt);
     void shutdown();
     void draw(SDL_Renderer* r, float x, float y, const std::string& text, float scale, SDL_Color color);
+    // Measure rendered text size in pixels for a given scale
+    void measure(const std::string& text, float scale, int& outW, int& outH);
 private:
     std::string fontPath;
     int baseSize{24};