v0.4.0

• ISF shader support (https://isf.video): loads ISF .fs files from an isf/ folder as the new "isf" generator. Parses the JSON header, maps ISF conventions (RENDERSIZE, TIME, IMG_PIXEL, gl_FragColor, ...) onto the engine's GLSL, and runs single- or multi-pass with persistent feedback buffers. INPUTS (float/bool/long/color/point2D) become live, modulatable parameters; compile errors surface in the web UI. Ships plasma + feedback examples. (GL3-only / derivative / custom-buffer-size shaders may not compile on real GLES2.)
• Dynamic LFO pool (up to 8, add/remove) with per-LFO live scopes.
• Resolume-style layout: Layers, FX chain and LFO racks with inline add/remove/reorder; clip-style media browser; floating draggable/resizable output monitor.
• Full-resolution parameter sliders.