manual_slop/conductor/tracks/frosted_glass_20260313/plan.md

Implementation Plan: Frosted Glass Background Effect (REPAIR - TRUE GPU)

Phase 1: Robust Shader & FBO Foundation

• Task: Implement: Create ShaderManager methods for downsampled FBO setup (scene, temp, blur). [d9148ac]
• Task: Implement: Develop the "Deep Sea" background shader and integrate it as the FBO source. [d85dc3a]
• Task: Implement: Develop the 2-pass Gaussian blur shaders with a wide tap distribution. [c8b7fca]
• Task: Conductor - User Manual Verification 'Phase 1: Robust Foundation' (Protocol in workflow.md)

Phase 2: High-Performance Blur Pipeline

• Task: Implement: Create the prepare_global_blur method that renders the background and blurs it at 1/4 resolution.
• Task: Implement: Ensure the pipeline correctly handles high-DPI scaling (fb_scale) for internal FBO dimensions.
• Task: Conductor - User Manual Verification 'Phase 2: High-Performance Pipeline' (Protocol in workflow.md)

Phase 3: GUI Integration & Screen-Space Sampling

• Task: Implement: Update _render_frosted_background to perform normalized screen-space UV sampling.
• Task: Implement: Update _begin_window and _end_window to manage global transparency and call the blur renderer.
• Task: Implement: Apply the new window wrappers to all primary panels in src/gui_2.py.
• Task: Conductor - User Manual Verification 'Phase 3: GUI Integration' (Protocol in workflow.md)

Phase 4: UI Tuning & Persistence

• Task: Implement: Add "Frosted Glass" tuning sliders to the Shader Editor.
• Task: Implement: Update src/theme_2.py to persist all frosted glass settings.
• Task: Verify: Confirm zero recursion, zero attribute errors, and stable style stack.
• Task: Conductor - User Manual Verification 'Phase 4: Final Polishing' (Protocol in workflow.md)