General Download Renamer

Automatically rename downloaded files based on user-defined patterns

## [1.2.0] - 2026-01-25 ### 🎆 Major New Features - **Custom Placeholders**: Create user-defined placeholders derived from existing ones using regex and keyword gating - Define placeholders with regex patterns containing one capture group - Optional keyword filtering to gate when regex runs - Supports deriving from any base placeholder (domain, tabUrl, sourceUrl, etc.) - **New URL Placeholders**: Access to download and referrer URLs - `{sourceUrl}`: Full download source URL - `{tabUrl}`: Referrer/tab URL when available - **Enhanced Floating Preview**: Shows both current pattern and preview with resolved values - Current pattern displays raw placeholder format - Preview pattern shows immediately resolvable values (domain, date, time, timestamp, tabUrl) - Download-time placeholders remain as `{placeholder}` in preview ### ✨ Enhancements - **Smart Filename Joining**: Empty placeholders are skipped during filename construction to prevent extra separators - **Improved Popup Positioning**: Better floating icon popup placement with viewport boundaries - **Enhanced UI**: Wider, scrollable popup with better word wrapping (340px, max 90vw x 70vh) - **Custom Placeholders Management**: Full UI for adding, editing, and deleting custom placeholder rules - **Dynamic Placeholder Updates**: Available placeholders update automatically when custom placeholders are added ### 🔧 Technical Improvements - Enhanced `processPattern()` to skip empty/null placeholder values - Custom placeholder processing in service worker with keyword gating logic - Preview resolution logic in floating icon for immediate feedback - Grid-based UI layout for custom placeholder rules (Name, Base, Regex, Keywords) - Improved drag/click handling in floating icon ### 📖 Documentation - Added custom placeholders section to README with examples - Documented Jira ID extraction use case - Updated placeholder descriptions with new URL placeholders - Added notes on preview limitations ### Example Use Cases - Extract Jira issue keys from URLs: `{jira_id}_{originalFilename}{ext}` - Use product IDs from download URLs in filenames - Extract project codes from tab URLs for automatic organization