- Add forex pair detection (USD/JPY, EUR/USD, etc.) with quote currency inference
- Add semantic analysis (NEGATIVE/POSITIVE_INDICATORS) to filter non-price numbers
- Add sentence-level proximity check to avoid false positives (15-minute, 180 pips)
- Add JPY to conversion menu and all 5 price sources
- Add isEditableContext filter to prevent ₿ duplication in input fields
- Add build.js for multi-browser support (Chrome, Edge, Brave, Firefox)
- Make ₿ symbol a CSS pseudo-element (non-copyable, non-selectable)
- Add scripting permission for auto-inject on install/update
- Update README with multi-browser instructions and new features