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97993b72fe
* feat(gameplay): implement greedy meshing for chunk generation Replace the per-face vertex generation with a greedy meshing algorithm that merges adjacent faces of the same block type into larger quads. Introduce `FaceKey` struct and helper functions (`axis_dir_to_face`, `get_block_safe`, `is_face_culled`, `choose_buf`) to support the new algorithm. Comment out the old `gen_vertices` implementation. In texture management, rename `m_pbr_texture_array` to `m_normal_texture_array` to reflect its actual usage, and set texture wrap mode to `GL_REPEAT` for both the block and normal texture arrays. * fix(primitive_data): correct back face texture coordinates and tangents * fix(texture-manager): correct texture deletion and refactor reload Make hot_reload private and add public need_reload method. Update UI to call need_reload instead of hot_reload. Fix incorrect use of glDeleteBuffers for normal texture array by using glDeleteTextures.