add config refactor structure

src/entities/Seaweed.cpp

@@ -0,0 +1,63 @@
+#include "Seaweed.h"
+#include "../core/Aquarium.h"
+#include "../utils/Random.h"
+#include "../utils/defs.h"
+
+Seaweed::Seaweed()
+    : Entity(),
+      height(Random::intInRange(SEAWEED_MIN_HEIGHT, SEAWEED_MAX_HEIGHT)),
+      speed(Random::floatInRange(0.1f, 0.3f)),
+      lifetime(Random::intInRange(SEAWEED_MIN_LIFETIME, SEAWEED_MAX_LIFETIME)) {
+
+  x = Random::intInRange(0, Aquarium::getInstance().getWidth());
+  y = Aquarium::getInstance().getHeight() - height;
+
+  current_image.resize(height);
+  current_mask.resize(height);
+  generateCurrentFrame();
+}
+
+void Seaweed::update() noexcept {
+  frame += speed;
+  if (frame >= 1.0f) {
+    pattern_flipped = !pattern_flipped;
+    frame -= 1.0f;
+    frame_dirty = true; // mark frame as needing regeneration
+  }
+  --lifetime;
+}
+
+const std::vector<std::string> &Seaweed::getImage() const {
+  if (frame_dirty) {
+    generateCurrentFrame();
+    frame_dirty = false;
+  }
+  return current_image;
+}
+
+const std::vector<std::string> &Seaweed::getMask() const {
+  if (frame_dirty) {
+    generateCurrentFrame();
+    frame_dirty = false;
+  }
+  return current_mask;
+}
+
+void Seaweed::generateCurrentFrame() const {
+  for (size_t i = 0; i < height; ++i) {
+    const bool use_left = (i % 2 == 0) ^ pattern_flipped;
+    const char ch = use_left ? PATTERN_LEFT : PATTERN_RIGHT;
+    const int offset = use_left ? 0 : 1;
+
+    current_image[i] = std::string(offset, ' ') + ch;
+    current_mask[i] = std::string(current_image[i].size(), 'g');
+  }
+}
+
+bool Seaweed::shouldBeRemoved() const noexcept { return lifetime == 0; }
+
+std::unique_ptr<Entity> Seaweed::createReplacement() const {
+  return std::make_unique<Seaweed>();
+}
+
+int Seaweed::getPreferredLayer() const noexcept { return 1; }