chore: Release v4.3.1 - Documentation Update

Version 4.3.1 - Documentation-focused patch release

Added:
- docs/RELEASE_NOTES_V4.3.1.md: Comprehensive release notes (350+ lines)
- CHANGELOG.md: Complete v4.3.1 changelog entry with documentation statistics
- README.md: Updated version badge, added v4.3.1 highlights and Wiki documentation links

Updated:
- platformio.ini: Version bumped from 4.3.0 to 4.3.1 (all 6 environments)
- README.md: Added Documentation section in Quick Start with direct Wiki links

Removed:
- RELEASE_NOTES_V4.3.0.md: Superseded by Wiki documentation
- RELEASE_SUMMARY.txt: Consolidated into CHANGELOG
- docs/MIGRATION_GUIDE_V4.2.0.md: Integrated into Wiki
- docs/RELEASE_NOTES_V4.2.0.md: Consolidated into CHANGELOG
- docs/technical/CODE_IMPROVEMENTS_V4.2.0.md: Archived

Documentation Highlights:
- 2,500+ lines of new Wiki documentation
- Port Scanner Wiki page (1,400+ lines)
- Signal Strength Monitor Wiki page (1,100+ lines)
- 5 updated Wiki pages with enhanced navigation
- 15+ API integration examples
- 10+ documented use cases
- 25+ service identifications
- Complete troubleshooting guides

Migration: No code changes - documentation-only release
All v4.3.0 features remain stable and unchanged

Author: arunkumar-mourougappane

CHANGELOG.md

@@ -5,6 +5,126 @@ All notable changes to the ESP32 WiFi Utility project are documented in this fil
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.3.1] - 2025-10-25
+
+### 📚 Documentation Update Release
+
+This patch release focuses on comprehensive Wiki documentation improvements and organization.
+
+#### Added - Wiki Documentation
+
+##### Port Scanner Documentation
+- **New Wiki Page**: `Port-Scanner.md` (1,400+ lines)
+  - Complete port scanning fundamentals and concepts
+  - Four scan types documentation (Common, Well-Known, Custom, All Ports)
+  - Service identification guide for 25+ common services
+  - Web interface detailed UI documentation
+  - RESTful API endpoints with JavaScript integration examples
+  - Five detailed use cases (router security, web server audit, database check, IoT discovery, network inventory)
+  - Legal and ethical considerations
+  - Security best practices and responsible disclosure guidelines
+  - Technical implementation details and performance characteristics
+  - Comprehensive troubleshooting guide
+  - Integration with other features
+  - Quick reference guide
+
+##### Signal Strength Monitor Documentation
+- **New Wiki Page**: `Signal-Strength-Monitor.md` (1,100+ lines)
+  - Complete RSSI reference guide with signal quality interpretation
+  - Serial command documentation (signal show/scan/monitor) with examples
+  - Web interface details with auto-refresh and color-coded meters
+  - Use cases: troubleshooting, positioning, site surveys, stability monitoring
+  - JSON API integration with JavaScript examples
+  - Best practices and optimization tips
+  - Technical specifications and performance metrics
+
+#### Updated - Wiki Navigation
+
+##### Home Page
+- Added Port Scanner to Network Analysis & Testing section
+- Added Signal Strength Monitor to navigation
+- Updated documentation structure
+
+##### Sidebar Navigation
+- Added Port Scanner link in Features section
+- Added Signal Strength Monitor link in Features section
+- Improved navigation hierarchy
+
+##### Web Configuration Interface
+- Updated page count from 8 to 10 pages
+- Added `/portscan` page description and features
+- Added `/signal` page description and features
+- Added Port Scanner API endpoints documentation
+- Added Signal Strength Monitor API endpoints documentation
+
+##### Command Reference
+- Added signal monitoring commands (signal show/scan/monitor)
+- Detailed examples and use cases for signal commands
+- Signal quality reference tables
+
+##### Quick Start Guide
+- Added Signal Strength Monitor to essential features list
+- Added signal commands to quick reference table
+- Updated feature count and descriptions
+
+#### Documentation Statistics
+
+- **Total Lines Added**: 2,500+ lines of comprehensive documentation
+- **New Wiki Pages**: 2 major feature documentation pages
+- **Updated Wiki Pages**: 5 existing pages enhanced
+- **API Examples**: JavaScript integration samples for all new endpoints
+- **Use Cases**: 10+ detailed real-world scenarios
+- **Troubleshooting**: Complete guides for common issues
+
+#### Quality Improvements
+
+##### Documentation Enhancements
+- Professional formatting with tables and code blocks
+- Clear section hierarchy and navigation
+- Comprehensive cross-referencing between pages
+- Mobile-friendly documentation structure
+- Consistent styling across all pages
+
+##### User Experience
+- Step-by-step guides for common tasks
+- Visual indicators and formatting for clarity
+- Quick reference sections for experienced users
+- Detailed explanations for beginners
+- Best practices and security warnings
+
+### Changed
+
+#### Version Management
+- Bumped version to 4.3.1 in all platformio.ini environments
+- Updated version strings across all build configurations
+
+### Removed
+
+#### Legacy Documentation
+- Removed outdated `RELEASE_NOTES_V4.3.0.md` (superseded by Wiki)
+- Removed old `RELEASE_SUMMARY.txt` (consolidated into CHANGELOG)
+- Removed `docs/MIGRATION_GUIDE_V4.2.0.md` (integrated into Wiki)
+- Removed `docs/RELEASE_NOTES_V4.2.0.md` (consolidated into CHANGELOG)
+- Removed `docs/technical/CODE_IMPROVEMENTS_V4.2.0.md` (archived)
+
+#### Documentation Consolidation
+- Migrated all release documentation to structured Wiki format
+- Centralized feature documentation in dedicated Wiki pages
+- Improved documentation discoverability and maintenance
+
+### Notes
+
+This release focuses entirely on documentation improvements following the v4.3.0 feature release. All features from v4.3.0 remain unchanged and stable. The comprehensive Wiki documentation provides users with detailed guides for:
+
+- Port Scanner network security auditing
+- Signal Strength Monitor for WiFi optimization
+- Complete API reference for integration
+- Best practices and troubleshooting
+
+**Migration**: No code changes - update documentation references to use new Wiki pages.
+
+---
+
 ## [4.3.0] - 2025-10-25
 
 ### 🚀 MAJOR: Advanced Network Analysis & TFT Display Release

README.md

@@ -1,7 +1,7 @@
 # ESP32 WiFi Utility Suite
 
 ![Build Status](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/actions/workflows/build.yml/badge.svg)
-![Version](https://img.shields.io/badge/version-4.3.0-blue.svg)
+![Version](https://img.shields.io/badge/version-4.3.1-blue.svg)
 ![Platform](https://img.shields.io/badge/platform-ESP32-blue.svg)
 ![Framework](https://img.shields.io/badge/framework-Arduino-green.svg)
 ![PlatformIO](https://img.shields.io/badge/build-PlatformIO-orange.svg)
@@ -11,6 +11,57 @@
 
 A professional-grade ESP32 WiFi analysis and management suite featuring comprehensive network scanning, signal strength monitoring, port scanning, visual spectrum analysis, TFT display support, performance testing, tri-board support, persistent configuration storage, instant mode switching via web interface, and simplified architecture.
 
+## 🎉 What's New in v4.3.1
+
+Version 4.3.1 is a **documentation-focused patch release** providing comprehensive Wiki documentation for all v4.3.0 features. This release significantly enhances user experience with detailed guides, API references, and best practices.
+
+### 📚 **Comprehensive Wiki Documentation**
+
+**New Wiki Pages** (2,500+ lines of documentation):
+
+- **[Port Scanner Documentation](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Port-Scanner)** (1,400+ lines)
+  - Port scanning fundamentals and TCP connection concepts
+  - Four scan types: Common (16 ports), Well-Known (1-1024), Custom Range, All Ports (65,535)
+  - 25+ service identifications (HTTP, SSH, MySQL, RDP, VNC, etc.)
+  - Web interface guide with detailed UI documentation
+  - RESTful API endpoints with JavaScript integration examples
+  - Real-world use cases: router security, web server audit, database checks, IoT discovery
+  - Legal and ethical considerations, security best practices
+  - Troubleshooting guide and technical implementation details
+
+- **[Signal Strength Monitor Documentation](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Signal-Strength-Monitor)** (1,100+ lines)
+  - RSSI fundamentals: dBm explained, quality ratings, signal interpretation
+  - Serial commands: `signal show/scan/monitor` with detailed examples
+  - Web interface with auto-refresh, color-coded meters, graphical bars
+  - Use cases: troubleshooting, positioning, site surveys, stability monitoring
+  - JSON API integration with JavaScript examples
+  - Best practices for accurate measurements and signal optimization
+  - Technical specifications, performance metrics, memory usage
+
+**Updated Wiki Pages**:
+- [Home](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Home) - Added navigation to new tools
+- [Web Configuration Interface](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Web-Configuration-Interface) - Updated to 10 pages, added API endpoints
+- [Command Reference](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Command-Reference) - Added signal commands
+- [Quick Start Guide](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Quick-Start-Guide) - Updated feature list
+- [Sidebar Navigation](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/_Sidebar) - Enhanced navigation
+
+### 📊 **Documentation Highlights**
+
+- **15+ API Integration Examples**: JavaScript code samples for all endpoints
+- **10+ Use Cases**: Real-world scenarios with step-by-step guides
+- **25+ Service Identifications**: Complete port-to-service mapping
+- **8+ New Commands**: Serial interface command documentation
+- **Complete Troubleshooting**: Common issues and solutions for all features
+- **Security Guidelines**: Legal considerations and responsible disclosure
+
+### 🔗 **Quick Links**
+
+- **GitHub Wiki**: [Complete Documentation](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki)
+- **Release Notes**: [v4.3.1 Details](docs/RELEASE_NOTES_V4.3.1.md)
+- **Changelog**: [Full Version History](CHANGELOG.md)
+
+---
+
 ## 🎉 What's New in v4.3.0
 
 Version 4.3.0 introduces **advanced network analysis tools**, **TFT display support**, and **visual spectrum analysis** for professional WiFi diagnostics and security auditing.
@@ -808,6 +859,16 @@ See our [Automated Release Documentation](docs/technical/AUTOMATED_RELEASES.md)
 
 ## ⚡ Quick Start
 
+### 📚 Documentation
+
+For comprehensive guides and API references, visit the [GitHub Wiki](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki):
+
+- **[Quick Start Guide](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Quick-Start-Guide)** - Get started in minutes
+- **[Port Scanner](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Port-Scanner)** - Network security auditing
+- **[Signal Strength Monitor](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Signal-Strength-Monitor)** - WiFi optimization
+- **[Command Reference](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Command-Reference)** - Complete command list
+- **[Web Configuration](https://github.com/arunkumar-mourougappane/esp32-wifi-utility/wiki/Web-Configuration-Interface)** - Browser interface guide
+
 ### 1. Hardware Setup
 
 #### ESP32 Development Board Setup: