docs: rename DEVELOPMENT.md to development.md and update links

- Rename docs/contributing/DEVELOPMENT.md to development.md (lowercase)
- Update all references from DEVELOPMENT.md to Development.md (titlecase links)
- Update docs/contributing/contributing.md
- Update docs/index.md

docs/contributing/contributing.md

@@ -4,7 +4,7 @@ Welcome to the Bookhoard contributing documentation. This section contains guide
 
 ## 🚀 Getting Started
 
-- **[Development Guide](DEVELOPMENT.md)** - Development workflow and architecture
+- **[Development Guide](Development.md)** - Development workflow and architecture
   - Architecture overview
   - Directory structure
   - Local development setup
@@ -22,7 +22,7 @@ Welcome to the Bookhoard contributing documentation. This section contains guide
 
 ## 🤝 How to Contribute
 
-We welcome contributions! Please see our [Development Guide](DEVELOPMENT.md) for information on:
+We welcome contributions! Please see our [Development Guide](Development.md) for information on:
 - Setting up your development environment
 - Understanding the codebase
 - Making pull requests

docs/index.md

@@ -53,7 +53,7 @@ Complete guide to Bookhoard documentation. Find what you need quickly.
 
 **[Contributing Portal](contributing/contributing.md)** - Development workflow
 
-- [Development Guide](contributing/DEVELOPMENT.md) - Architecture, setup, testing
+ - [Development Guide](contributing/Development.md) - Architecture, setup, testing
 - [PROJECT_GUIDELINES.md](PROJECT_GUIDELINES.md) - Development rules and standards
 
 ---
@@ -66,7 +66,7 @@ Complete guide to Bookhoard documentation. Find what you need quickly.
 | **Set up a device** | [User Portal → Device Setup](user/user-guide.md) |
 | **Use the API** | [Developer Portal → API Docs](developer/development.md) |
 | **Deploy Bookhoard** | [Operations Portal → Troubleshooting](operations/troubleshooting.md) |
-| **Contribute code** | [Contributing Portal → Development Guide](contributing/DEVELOPMENT.md) |
+ | **Contribute code** | [Contributing Portal → Development Guide](contributing/Development.md) |
 | **Understand sync** | [User Portal → Sync Guide](user/sync-guide.md) |
 
 ---
@@ -84,7 +84,7 @@ Complete guide to Bookhoard documentation. Find what you need quickly.
 | ...resolve conflicts? | [Sync Guide](user/sync-guide.md) - Managing Conflicts |
 | ...troubleshoot deployment? | [Troubleshooting Guide](operations/troubleshooting.md) |
 | ...use the API? | [API Reference](developer/api-reference.md) |
-| ...contribute code? | [Development Guide](contributing/DEVELOPMENT.md) |
+ | ...contribute code? | [Development Guide](contributing/Development.md) |
 
 ### "Where is..."
 
@@ -116,7 +116,7 @@ Complete guide to Bookhoard documentation. Find what you need quickly.
 1. Follow [README.md](../README.md) quick start
 2. Configure environment: [.env.example](../.env.example)
 3. Review [Troubleshooting Guide](operations/troubleshooting.md)
-4. Check [Development Guide](contributing/DEVELOPMENT.md) for performance tuning
+4. Check [Development Guide](contributing/Development.md) for performance tuning
 
 ---
 
@@ -126,7 +126,7 @@ When adding new features:
 
 1. **User-facing features** → Update relevant User docs
 2. **API endpoints** → Update [API Reference](developer/api-reference.md) & split docs
-3. **Backend changes** → Update [Development Guide](contributing/DEVELOPMENT.md)
+3. **Backend changes** → Update [Development Guide](contributing/Development.md)
 4. **Deployment changes** → Update [Operations Portal](operations/operations.md)
 
 Keep [PROJECT_GUIDELINES.md](PROJECT_GUIDELINES.md) in mind for documentation standards.