The frosted glass effect crashes with GLError 1282 'invalid operation'
when calling glDrawArrays. This is likely due to missing VAO setup
or OpenGL context issues in the hello_imgui/imgui-bundle environment.
DISABLED the effect by default to allow the app to run.
Feature needs proper OpenGL VAO setup to work.
- Remove _init_blur_pipeline call from _post_init (display_size invalid at startup)
- Add validation for ws.x > 0 and ws.y > 0 before FBO creation
- Add validation for fb_scale > 0 with default fallback to 1.0
- Make _init_blur_pipeline return bool for success/failure
- Update plan.md to reflect current progress
Fixes crash: GLError(err=1281, description=b'invalid value')
- Add compile_deepsea_shader() with animated underwater-like GLSL shader
- Add render_deepsea_to_fbo() to render background to scene FBO
- Deep Sea shader features: FBM noise, animated blobs, caustic lines, vignette
- Add deepsea_program to cleanup() for proper resource management
- Add 2 new tests for Deep Sea shader compilation and FBO rendering
Task: Phase 1, Task 2 of frosted_glass_20260313 track