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Changelog

All notable changes to this project will be documented in this file.

[2.2.0] - 2026-04-23

Added

  • QR/Barcode Decode - Decode QR codes and barcodes from images
    • Image upload via file picker
    • Drag-and-drop image support
    • Ctrl+V paste from clipboard
    • Scrollable image preview for large images
    • Copy decoded content button
    • Click placeholder to upload images
  • Random String Generator - Generate random strings with configurable options
    • Configurable count (default: 1) and length (default: 8)
    • Character set options: lowercase, uppercase, numbers, special characters
    • Secure random number generation using RandomNumberGenerator
    • Copy and clear result buttons
  • Home Page Layout - Updated to 4 cards per row

Changed

  • Home Page Icons - Updated icons for better visual clarity
    • Random String: List icon (fa-list)
    • String Escape: Exchange icon (fa-exchange)

[2.1.0] - 2026-04-17

Added

  • JSON Compress Feature - Compress JSON to single-line format
    • Remove all whitespace and line breaks
    • Preserve JSON structure and data
    • Success/error message feedback
    • Integrated with existing JSON formatter page
  • Copy Input Content Button - Copy original JSON input
    • Up arrow + copy icon combination
    • Copy content from input textbox
    • Separate from formatted JSON copy button
  • Enhanced Copy Buttons - Distinguish copy sources with icons
    • Copy Input: Up arrow + Copy icon (⬆️📋)
    • Copy Formatted: Copy icon + Down arrow (📋⬇️)
    • Clear visual distinction between two copy actions
  • Full Internationalization (i18n) - Complete i18n support for all user-facing text
    • All MessageBox prompts now use resource strings
    • All button tooltips internationalized
    • All loading indicators internationalized
    • Support for Chinese (zh-CN) and English (en-US)
    • New resource strings: JSONCompress, JSONCompressed, DragToSort, ProcessJSONError, CompressJSONError, Processing, CopyInputContent, InputContentCopied, CopyFailed, PleaseEnterContent

Changed

  • Button Layout - Reorganized JSON formatter toolbar
    • Moved copy buttons together for better UX
    • Button order: Format | Compress | ExpandAll | CollapseAll | CopyInput | CopyFormatted
    • More intuitive button grouping
  • Icon Design - Enhanced copy button icons
    • Copy Input: Up arrow indicates source is above
    • Copy Formatted: Down arrow indicates source is below
    • Visual cues match button functionality

Technical Details

  • All hardcoded Chinese strings replaced with resource references
  • Complete i18n coverage for all user interface elements
  • Resource files updated: Strings.zh-CN.resx, Strings.en-US.resx, Strings.cs

[2.1.0] - 2026-04-17

Added

  • JSON Compress Feature - Compress JSON to single-line format
    • Remove all whitespace and line breaks
    • Preserve JSON structure and data
    • Success/error message feedback
    • Integrated with existing JSON formatter page
  • Copy Input Content Button - Copy original JSON input
    • Up arrow + copy icon combination
    • Copy content from input textbox
    • Separate from formatted JSON copy button
  • Enhanced Copy Buttons - Distinguish copy sources with icons
    • Copy Input: Up arrow + Copy icon (⬆️📋)
    • Copy Formatted: Copy icon + Down arrow (📋⬇️)
    • Clear visual distinction between two copy actions
  • Full Internationalization (i18n) - Complete i18n support for all user-facing text
    • All MessageBox prompts now use resource strings
    • All button tooltips internationalized
    • All loading indicators internationalized
    • Support for Chinese (zh-CN) and English (en-US)
    • New resource strings: JSONCompress, JSONCompressed, DragToSort, ProcessJSONError, CompressJSONError, Processing, CopyInputContent, InputContentCopied, CopyFailed, PleaseEnterContent

Changed

  • Button Layout - Reorganized JSON formatter toolbar
    • Moved copy buttons together for better UX
    • Button order: Format | Compress | ExpandAll | CollapseAll | CopyInput | CopyFormatted
    • More intuitive button grouping
  • Icon Design - Enhanced copy button icons
    • Copy Input: Up arrow indicates source is above
    • Copy Formatted: Down arrow indicates source is below
    • Visual cues match button functionality

Technical Details

  • All hardcoded Chinese strings replaced with resource references
  • Complete i18n coverage for all user interface elements
  • Resource files updated: Strings.zh-CN.resx, Strings.en-US.resx, Strings.cs

[2.0.0] - 2026-04-12

Added

  • RESTful API Server - Complete HTTP API for all tool functions
    • 13 API endpoints for programmatic access
    • AI agent integration support
    • CORS support for browser-based applications
    • Configurable port (default: 5000)
    • Enable/disable option in App.config
  • API Documentation - Comprehensive API documentation
    • Complete endpoint documentation (README.md)
    • Usage examples in multiple languages (EXAMPLES.md)
    • Quick reference guide (QUICK_REFERENCE.md)
    • Project structure documentation (PROJECT_STRUCTURE.md)
    • Refactoring summary (REFACTORING_SUMMARY.md)
  • API Test Script - PowerShell script to test all API endpoints
  • API Service Layer - Modular service architecture
    • IMd5ApiService - MD5 hash computation
    • IJsonApiService - JSON formatting and validation
    • IUrlEncodeApiService - URL encoding/decoding
    • IEscapeApiService - String escaping/unesaping
    • IBase64ApiService - Base64 encoding/decoding
    • IQrCodeApiService - QR code generation
    • IBarcodeApiService - Barcode generation (11 formats)
    • ISignatureApiService - Signature generation
  • HTTP Server - Lightweight HTTP server based on HttpListener
    • Asynchronous request processing
    • Thread-safe operation
    • Unified response format
    • Error handling with error codes
  • Configuration Options - App.config settings for API server
    • EnableApiServer - Enable/disable API server
    • ApiServerPort - Configure server port

Changed

  • README.md - Updated with API documentation section
  • Project Structure - Added API directory and documentation
  • MainWindow - Integrated API server lifecycle management
  • Documentation Language - All documentation now in English

Technical Details

  • Architecture - Service-oriented architecture with clear separation
  • Design Patterns - Singleton, Dependency Injection, Strategy Pattern
  • Security - Localhost-only binding, configurable port
  • Performance - Asynchronous processing, low memory footprint

Documentation

  • All API documentation in English
  • Code examples in Python, JavaScript, cURL, and PowerShell
  • Quick reference for all endpoints
  • Integration examples for AI agents

[1.3.0] - 2026-04-10

Added

  • String Escape/Unescape functionality
    • Escape special characters in strings
    • Unescape escaped strings
    • Support for common escape sequences (\n, \t, \r, etc.)
  • JSON formatter improvements
    • Double-click to select only the value (excluding key and colon)
    • Right-click context menu now copies selected text instead of full line
    • Auto word wrap for long JSON values
    • No horizontal scrolling needed

Changed

  • QR Code and Barcode pages
    • Clear input field after generating new codes
  • Optimized shortcut creation, working directory and window style settings

[1.2.0] - 2025-03-20

Added

  • QR Code and Barcode page state persistence
    • Generated results are now saved and restored on app restart
    • Images stored as Base64 in local state file

Changed

  • URL Encode/Decode page button layout
    • Button order changed to: URLEncode | URLDecode | Copy
    • Buttons now use text labels instead of icons for better clarity

[1.1.0] - 2025-03-12

Added

  • Single instance application support
    • Prevent multiple instances from running simultaneously
    • Automatically activate existing window when attempting to launch again
    • Works correctly even when minimized to system tray
  • Handwritten signature page
    • Convert signature to Base64 string
    • Adjustable pen size with smooth strokes
    • Save signature as image file (PNG, JPEG, BMP, GIF)

Changed

  • Removed balloon tip notification when minimizing to tray
  • Signature page UI improvements
    • Buttons changed to icon style
    • Pen size control repositioned to bottom toolbar
    • Default pen size changed to 7
    • Removed image preview, showing Base64 string directly
  • Home page cards repositioned for better visual centering

Improved

  • Cleaned up unused using statements in MainWindow.xaml.cs
  • Better stroke smoothing with FitToCurve enabled

[1.0.2] - 2025-03-11

Added

  • Single instance application support
    • Prevent multiple instances from running simultaneously
    • Automatically activate existing window when attempting to launch again
    • Works correctly even when minimized to system tray

Fixed

  • Balloon tip icon not displaying when minimized to tray
    • Changed from system icon to application icon for better visibility

Improved

  • Cleaned up unused using statements in MainWindow.xaml.cs

[1.0.1] - 2025-03-10

Added

  • Image preview and save functionality for Base64 decoder
    • Click image to preview in full window
    • Save image to local file (PNG, JPEG, BMP, GIF)
  • Close confirmation dialog with minimize to tray option
    • Remember user's choice during session
    • Ask again after app restart
  • Multi-architecture build support (x86, x64, arm64)
  • MSI installer with Inno Setup
  • Code signing with self-signed certificate
  • Application icon for exe and installer

Changed

  • Renamed application to "开发者工具" (Chinese) / "DevTools" (English)

Version History

  • 2.0.0 - RESTful API integration (Current)
  • 1.3.0 - String escape/unescape, JSON improvements
  • 1.2.0 - State persistence for QR/Barcode
  • 1.1.0 - Single instance, signature feature
  • 1.0.2 - Bug fixes
  • 1.0.1 - Initial release with full features