docs: Update versioning to v1.2.0 with more conservative approach

- Changed version from v2.0.0 to v1.2.0 for conservative versioning
- Updated CHANGELOG.md to reflect v1.2.0 as feature enhancement release
- Modified development documentation to reference v1.2.0
- Maintained semantic versioning principles with minor version bump

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

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Tyko

CHANGELOG.md

@@ -5,9 +5,9 @@ All notable changes to SlayNode will be documented in this file.
 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).
 
-## [2.0.0] - 2025-10-12
+## [1.2.0] - 2025-10-12
 
-### 🚀 Major Improvements
+### ✨ New Features & Improvements
 
 #### Architecture & Code Quality
 - **Threading Modernization**: Migrated from DispatchQueue to modern Swift concurrency (Task, async/await)
@@ -47,7 +47,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **Testing Foundation**: Improved error handling makes testing more reliable
 - **Future-Proofing**: Modern Swift patterns ensure long-term maintainability
 
-## [1.x.x] - Previous Versions
+## [1.1.x] - Previous Versions
 
 ### Core Features
 - Menu bar integration with popover interface
@@ -70,6 +70,6 @@ No action required - all changes are backward compatible and improve reliability
 - Process parsing functions have been unified
 - Threading model has been simplified with MainActor isolation
 
-### Breaking Changes
+### Compatibility
 - Internal API changes only - no user-facing breaking changes
 - All existing functionality preserved with enhanced reliability

docs/DEVELOPMENT.md

@@ -99,7 +99,7 @@ private func performProcessDetection() async -> [NodeProcessItemViewModel] {
 - **Code Optimization**: Eliminated ~500+ lines of duplicate code through unified process parsing
 - **Error Resilience**: Graceful degradation and comprehensive error recovery mechanisms
 
-### Recent Improvements (v2.0)
+### Recent Improvements (v1.2.0)
 
 - **Threading Standardization**: Migrated from DispatchQueue to modern Swift concurrency
 - **Error Handling Enhancement**: Implemented comprehensive error type system with localized descriptions