feat: Add Check for Updates menu item and prepare v0.7.1 release

- Add "Check for Updates..." to DevWorkbench application menu
- Add standard macOS Edit and Window menus
- Listen for menu event in frontend to trigger manual update check
- Fix CI/CD workflow to rename .app.tar.gz files with architecture suffix

Co-Authored-By: Claude Opus 4.5 <[email protected]>

feat: Add auto-update feature and prepare v0.7.0 release

- Implement auto-update using Tauri updater plugin
- Add UpdateDialog component for update notification
- Add UpdateContext for app-wide update state management
- Configure CI/CD to generate updater artifacts (latest.json, signatures)
- Update Tauri config with updater endpoint and public key

Co-Authored-By: Claude Opus 4.5 <[email protected]>

fix: Migrate to Tailwind v4 syntax and optimize sidebar UI

- Update styles.css to use Tailwind v4 @import syntax
- Move custom utility classes into @layer utilities
- Simplify sidebar menu item styling (remove borders, reduce padding)
- Fix Theme icon not displaying (add shrink-0 to SVG)
- Use inline styles for reliable selected state background color
- Update Pangu Spacing screenshot

Co-Authored-By: Claude Opus 4.5 <[email protected]>

chore: Prepare v0.5.0 release with Regex Tester feature

- Update CHANGELOG.md with v0.5.0 release notes
- Update README.md with Regex Tester feature description
- Add Regex Tester section to docs/features.md
- Add Regex Tester card to docs/index.md
- Add regex-tester.png screenshot
- Bump version to 0.5.0 in package.json and tauri.conf.json

Co-Authored-By: Claude Opus 4.5 <[email protected]>

feat: Add JSON Formatter search functionality (v0.4.1)

- Search JSON keys and values with real-time highlighting
- Navigate between matches with Previous/Next buttons
- Keyboard shortcuts: Cmd/Ctrl+F, Enter, Shift+Enter, Esc
- Match counter showing current position
- Auto-scroll to results while keeping search panel visible

Co-Authored-By: Claude Opus 4.5 <[email protected]>

feat: Add OpenAPI Spec Filter feature (v0.4.0)

- Load OpenAPI/Swagger JSON spec files
- Multi-select endpoints with search and tag filtering
- Automatic $ref dependency tracking (schemas, parameters, responses)
- Export filtered spec with Copy and Download options
- HTTP method color-coded badges
- Update GitHub Pages documentation

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Fix JWT Token Tool crash with invalid JSON payload (issue #1)

- Added real-time JSON validation with clear error messages
- Improved error handling to prevent application crashes
- Added JSON format button for better user experience
- Disabled encode button when JSON is invalid
- Bump version to 0.3.4

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Prepare release v0.3.3

- Add Cron Job Parser feature with comprehensive functionality
- Add Unix Time Converter with timezone support
- Add Text Utilities feature with Unicode surrogate pair support
- Update version to 0.3.3 in all configuration files
- Update CHANGELOG.md for v0.3.3 release

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Release v0.3.2 - URL Tools

Bump version to 0.3.1 for JSON Formatter bug fix release

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>