Simplify and streamline README

- Reduce verbosity while keeping essential information
- Condense features section into bullet points
- Simplify installation to single code block
- Streamline usage instructions
- Remove redundant sections (project structure details)
- Keep screenshot and all important information

Author: star7js

README.md

@@ -2,219 +2,74 @@
 
 [![CI](https://github.com/star7js/vm-visualizer/actions/workflows/ci.yml/badge.svg)](https://github.com/star7js/vm-visualizer/actions/workflows/ci.yml)
 
-A modern, feature-rich PyQt5 application for previewing and rendering Velocity templates with real-time syntax highlighting, validation, and export capabilities.
+Desktop application for previewing and rendering Velocity templates with syntax highlighting and validation.
 
 ![Velocity Template Previewer](example-template-render.png)
 
 ## Features
 
-### 🎨 **Modern UI/UX**
-- Clean, modern interface with tabbed layout
 - Syntax highlighting for Velocity templates and JSON data
-- Responsive design with customizable splitter panes
-- Professional styling with hover effects
-
-### ⚡ **Enhanced Functionality**
-- **Real-time syntax highlighting** for Velocity templates and JSON data
-- **Background rendering** for better performance
-- **Auto-save functionality** (every 30 seconds)
-- **Recent files support** with quick access menu
-- **Template and data validation** with detailed error messages
-- **Export to HTML** with professional styling
-
-### 🔧 **Developer Tools**
-- Template syntax validation (Ctrl+Shift+V)
-- JSON data validation (Ctrl+Shift+D)
-- Error highlighting and detailed error messages
-- Progress indicators for long operations
-- Settings persistence across sessions
-
-### 📁 **File Management**
-- Open/save Velocity templates (.vm files)
-- Load JSON data files
-- Recent files tracking
+- Real-time template validation with error messages
+- Background rendering for performance
+- Auto-save (every 30 seconds)
 - Export rendered output to HTML
-- Auto-save with silent operation
+- Recent files tracking
+- Dark mode support
 
 ## Installation
 
-### Prerequisites
-- Python 3.9 or higher
-- PyQt5
-- Airspeed (Velocity template engine)
-
-### Quick Start
-
-1. **Clone or download the project**
-   ```bash
-   git clone <repository-url>
-   cd vm-visualizer
-   ```
-
-2. **Install dependencies**
-   ```bash
-   # Using pip
-   pip install PyQt5 airspeed
-   
-   # Or using the project's dependency management
-   pip install -e .
-   ```
-
-3. **Run the application**
-   ```bash
-   python main.py
-   ```
+Requires Python 3.9+
 
-## Usage
+```bash
+git clone https://github.com/star7js/vm-visualizer.git
+cd vm-visualizer
+pip install PyQt5 airspeed
+python main.py
+```
 
-### Basic Workflow
+## Usage
 
-1. **Open a template**: Use `File > Open Template` or drag a `.vm` file
-2. **Add data**: Switch to the "Data" tab and enter JSON data
-3. **Render**: Click "Render Template" or press F5
-4. **Export**: Use `Tools > Export as HTML` to save the output
+1. Open a Velocity template (.vm file)
+2. Add JSON data in the Data tab
+3. Press F5 to render
+4. Export to HTML if needed
 
 ### Keyboard Shortcuts
 
 | Action | Shortcut |
 |--------|----------|
+| Render Template | F5 |
 | Open Template | Ctrl+O |
 | Save Template | Ctrl+S |
-| Save Template As | Ctrl+Shift+S |
-| Render Template | F5 |
 | Validate Template | Ctrl+Shift+V |
 | Validate Data | Ctrl+Shift+D |
-| Exit | Ctrl+Q |
-
-### Example Files
 
-The project includes example files to get you started:
+See `example-template.vm` and `example-data.json` for examples.
 
-- `example-template.vm` - A comprehensive Velocity template demonstrating various features
-- `example-data.json` - Sample JSON data that works with the example template
+## Supported Velocity Features
 
-## Template Features
-
-The application supports all standard Velocity template features:
-
-### Variables
-```velocity
-$variable
-${variable}
-```
-
-### Directives
-```velocity
-#set($variable = "value")
-#if($condition)
-    content
-#end
-#foreach($item in $list)
-    $item
-#end
-```
-
-### Comments
-```velocity
-## Single line comment
-#*
-   Multi-line comment
-*#
-```
-
-## Project Structure
-
-```
-vm-visualizer/
-├── main.py                 # Main application entry point
-├── utils.py               # Utility functions and constants
-├── syntax_highlighters.py # Syntax highlighting classes
-├── example-template.vm    # Example Velocity template
-├── example-data.json      # Example JSON data
-├── pyproject.toml         # Project configuration
-└── README.md             # This file
-```
+Supports standard Velocity syntax: variables (`$var`), directives (`#if`, `#foreach`, `#set`), and comments (`##`).
 
 ## Development
 
-### Code Organization
-
-The application is organized into modular components:
+Project structure:
+- `main.py` - Application UI and logic
+- `utils.py` - Template processing and utilities
+- `syntax_highlighters.py` - Syntax highlighting
 
-- **`main.py`**: Main application window and UI logic
-- **`utils.py`**: Utility functions, constants, and template processing
-- **`syntax_highlighters.py`**: Syntax highlighting for different languages
-
-### Adding Features
-
-1. **New syntax highlighting**: Add classes to `syntax_highlighters.py`
-2. **Utility functions**: Add to `utils.py`
-3. **UI features**: Extend the main window class in `main.py`
-
-### Building
-
-The project uses modern Python packaging:
-
-```bash
-# Install in development mode
-pip install -e .
-
-# Build distribution
-python -m build
-```
-
-## Configuration
-
-### Settings
-
-The application automatically saves and restores:
-- Window geometry and position
-- Splitter pane sizes
-- Recent files list (last 10 files)
-
-Settings are stored in the system's application data directory.
-
-### Customization
-
-You can customize the application by modifying:
-- `utils.py` - Constants and styling
-- `syntax_highlighters.py` - Color schemes
-- `main.py` - UI layout and behavior
+Settings (window size, recent files) are automatically saved to your system's app data directory.
 
 ## Troubleshooting
 
-### Common Issues
-
-1. **Template not rendering**: Check for syntax errors using `Tools > Validate Template`
-2. **JSON errors**: Use `Tools > Validate Data` to check JSON syntax
-3. **Performance issues**: Large templates are rendered in background threads
-
-### Error Messages
-
-The application provides detailed error messages for:
-- Template syntax errors
-- JSON parsing errors
-- File I/O errors
-- Rendering errors
-
-## Contributing
-
-1. Fork the repository
-2. Create a feature branch
-3. Make your changes
-4. Add tests if applicable
-5. Submit a pull request
+- **Template errors**: Use `Tools > Validate Template` (Ctrl+Shift+V)
+- **JSON errors**: Use `Tools > Validate Data` (Ctrl+Shift+D)
+- **Performance**: Large templates render in background threads
 
 ## License
 
-This project is open source and available under the MIT License.
-
-## Acknowledgments
-
-- Built with [PyQt5](https://www.riverbankcomputing.com/software/pyqt/)
-- Uses [Airspeed](https://github.com/purcell/airspeed) for Velocity template processing
-- Inspired by modern code editors and IDEs
+MIT License
 
----
+## Built With
 
-**Happy templating!** 🚀
+- [PyQt5](https://www.riverbankcomputing.com/software/pyqt/) - UI framework
+- [Airspeed](https://github.com/purcell/airspeed) - Velocity template engine