Add WiFi prompt

src/home.cpp

@@ -180,6 +180,16 @@ void Home::render(SDL_Renderer *renderer)
         SDL_RenderFillRect(renderer, &line);
     }
 
+    // Large bold reminder to connect WiFi, drawn below the menu while no
+    // network is joined (refreshed every 5s in update()).
+    if (wifiNote_.texture && ssid_.empty())
+    {
+        float noteX = (fw - wifiNote_.width) / 2.0f;
+        float noteY = settingsY_ + settings_.height + 40.0f;
+        SDL_FRect noteDst{noteX, noteY, wifiNote_.width, wifiNote_.height};
+        SDL_RenderTexture(renderer, wifiNote_.texture, nullptr, &noteDst);
+    }
+
     // Bottom-right status footer (20pt, aligned to a virtual rectangle:
     // names left-aligned at the rect's left edge, values right-aligned at
     // the rect's right edge; the longest name's colon sits 4 spaces from its
@@ -352,6 +362,15 @@ void Home::createTextures(AppState &state)
 
     TTF_CloseFont(font);
 
+    font = TTF_OpenFont("assets/fonts/Roboto-Regular.ttf", 48);
+    if (font)
+    {
+        TTF_SetFontStyle(font, TTF_STYLE_BOLD);
+        wifiNote_ = renderText(state.renderer, font, "Please connect to WiFi", white);
+        TTF_SetFontStyle(font, TTF_STYLE_NORMAL);
+        TTF_CloseFont(font);
+    }
+
     SDL_Surface *bgSurface = IMG_Load("assets/images/RWT-Circular-Color-ForOnDark-NoText.png");
     if (bgSurface)
     {
@@ -410,6 +429,11 @@ void Home::destroyTextures()
         SDL_DestroyTexture(settings_.texture);
         settings_.texture = nullptr;
     }
+    if (wifiNote_.texture)
+    {
+        SDL_DestroyTexture(wifiNote_.texture);
+        wifiNote_.texture = nullptr;
+    }
     for (auto &t : footerNames_)
         t.destroy();
     for (auto &t : footerValues_)

src/home.h

@@ -34,6 +34,7 @@ private:
     TextLine play_;
     TextLine settings_;
     TextLine bg_;
+    TextLine wifiNote_;
 
     AppState* state_ = nullptr;
     float playY_ = 0;