feat: integrate 4-stem separation, de-reverb, and ui enhancements

feat: Redesign ExtractionFlowDiagram to match LangGraph tree node reference with neon glow aesthetics

fix: syntax errors with escaping backticks in ExtractionFlowDiagram

feat: Completely redesign ExtractionFlowDiagram into an animated vertical LLM pipeline UI

fix: resolve all ESLint warnings and errors across frontend components

feat: unique pro tools UI and animated SVG extraction flow