docs: comprehensive documentation updates and modernization

- Update BUILDING.md with current build system information
- Modernize various README files across the project
- Update CHANGELOG.md with recent changes
- Improve documentation consistency and formatting
- Update platform-specific documentation (iOS, Electron, Docker)
- Enhance test documentation and build guides

doc/electron-cleanup-summary.md

@@ -7,18 +7,22 @@ This document summarizes the comprehensive cleanup and improvements made to the
 ## Key Issues Resolved
 
 ### 1. Platform Detection Problems
+
 - **Before**: `PlatformServiceFactory` only supported "capacitor" and "web" platforms
 - **After**: Added proper "electron" platform support with dedicated `ElectronPlatformService`
 
 ### 2. Build Configuration Confusion
+
 - **Before**: Electron builds used `VITE_PLATFORM=capacitor`, causing confusion
 - **After**: Electron builds now properly use `VITE_PLATFORM=electron`
 
 ### 3. Missing Platform Service Methods
+
 - **Before**: Platform services lacked proper `isElectron()`, `isCapacitor()`, `isWeb()` methods
 - **After**: All platform services implement complete interface with proper detection
 
 ### 4. Inconsistent Build Scripts
+
 - **Before**: Mixed platform settings in build scripts
 - **After**: Clean, consistent electron-specific build process
 
@@ -215,11 +219,13 @@ if (capabilities.hasFileDownload) {
 ## File Structure Changes
 
 ### New Files
+
 - `vite.config.electron.mts` - Electron-specific Vite configuration
 - `src/main.electron.ts` - Electron main entry point
 - `doc/electron-cleanup-summary.md` - This documentation
 
 ### Modified Files
+
 - `src/services/PlatformServiceFactory.ts` - Added electron platform support
 - `src/services/PlatformService.ts` - Added platform detection methods
 - `src/services/platforms/CapacitorPlatformService.ts` - Added missing interface methods
@@ -301,4 +307,4 @@ For developers working with the previous implementation:
 - [ ] Implement desktop-specific UI components
 - [ ] Add Electron auto-updater integration
 - [ ] Create platform-specific testing utilities
-- [ ] Add desktop notification system integration 
+- [ ] Add desktop notification system integration