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/migration-to-wa-sqlite.md

@@ -29,12 +29,15 @@ This document outlines the migration process from Dexie.js to absurd-sql for the
 ## Migration Architecture
 
 ### Migration Fence
+
 The migration fence is now defined by the **PlatformServiceMixin** in `src/utils/PlatformServiceMixin.ts`:
+
 - **PlatformServiceMixin**: Centralized database access with caching and utilities
 - **Migration Tools**: Exclusive interface between legacy and new databases
 - **Service Layer**: All database operations go through PlatformService
 
 ### Migration Order
+
 The migration follows a specific order to maintain data integrity:
 
 1. **Accounts** (foundational - contains DIDs)
@@ -45,9 +48,11 @@ The migration follows a specific order to maintain data integrity:
 ## ActiveDid Migration ⭐ **NEW FEATURE**
 
 ### Problem Solved
+
 Previously, the `activeDid` setting was not migrated from Dexie to SQLite, causing users to lose their active identity after migration.
 
 ### Solution Implemented
+
 The migration now includes a dedicated step for migrating the `activeDid`:
 
 1. **Detection**: Identifies the `activeDid` from Dexie master settings
@@ -58,6 +63,7 @@ The migration now includes a dedicated step for migrating the `activeDid`:
 ### Implementation Details
 
 #### New Function: `migrateActiveDid()`
+
 ```typescript
 export async function migrateActiveDid(): Promise<MigrationResult> {
   // 1. Get Dexie settings to find the activeDid
@@ -76,13 +82,17 @@ export async function migrateActiveDid(): Promise<MigrationResult> {
    ```
 
 #### Enhanced `migrateSettings()` Function
+
 The settings migration now includes activeDid handling:
+
 - Extracts `activeDid` from Dexie master settings
 - Validates account existence in SQLite
 - Updates SQLite master settings with the `activeDid`
 
 #### Updated `migrateAll()` Function
+
 The complete migration now includes a dedicated step for activeDid:
+
 ```typescript
 // Step 3: Migrate ActiveDid (depends on accounts and settings)
 logger.info("[MigrationService] Step 3: Migrating activeDid...");
@@ -90,6 +100,7 @@ const activeDidResult = await migrateActiveDid();
 ```
 
 ### Benefits
+
 - ✅ **User Identity Preservation**: Users maintain their active identity
 - ✅ **Seamless Experience**: No need to manually select identity after migration
 - ✅ **Data Consistency**: Ensures all identity-related settings are preserved
@@ -98,17 +109,20 @@ const activeDidResult = await migrateActiveDid();
 ## Migration Process
 
 ### Phase 1: Preparation ✅
+
 - [x] PlatformServiceMixin implementation
 - [x] Implement data comparison tools
 - [x] Create migration service structure
 
 ### Phase 2: Core Migration ✅
+
 - [x] Account migration with `importFromMnemonic`
 - [x] Settings migration (excluding activeDid)
 - [x] **ActiveDid migration** ⭐ **COMPLETED**
 - [x] Contact migration framework
 
 ### Phase 3: Validation and Cleanup 🔄
+
 - [ ] Comprehensive data validation
 - [ ] Performance testing
 - [ ] User acceptance testing
@@ -117,6 +131,7 @@ const activeDidResult = await migrateActiveDid();
 ## Usage
 
 ### Manual Migration
+
 ```typescript
 import { migrateAll, migrateActiveDid } from '../services/indexedDBMigrationService';
 
@@ -128,6 +143,7 @@ const activeDidResult = await migrateActiveDid();
 ```
 
 ### Migration Verification
+
 ```typescript
 import { compareDatabases } from '../services/indexedDBMigrationService';
 
@@ -136,7 +152,9 @@ console.log('Migration differences:', comparison.differences);
 ```
 
 ### PlatformServiceMixin Integration
+
 After migration, use the mixin for all database operations:
+
 ```typescript
 // Use mixin methods for database access
 const contacts = await this.$contacts();
@@ -147,11 +165,13 @@ const result = await this.$db("SELECT * FROM contacts WHERE did = ?", [accountDi
 ## Error Handling
 
 ### ActiveDid Migration Errors
+
 - **Missing Account**: If the `activeDid` from Dexie doesn't exist in SQLite accounts
 - **Database Errors**: Connection or query failures
 - **Settings Update Failures**: Issues updating SQLite master settings
 
 ### Recovery Strategies
+
 1. **Automatic Recovery**: Migration continues even if activeDid migration fails
 2. **Manual Recovery**: Users can manually select their identity after migration
 3. **Fallback**: System creates new identity if none exists
@@ -159,11 +179,13 @@ const result = await this.$db("SELECT * FROM contacts WHERE did = ?", [accountDi
 ## Security Considerations
 
 ### Data Protection
+
 - All sensitive data (mnemonics, private keys) are encrypted
 - Migration preserves encryption standards
 - No plaintext data exposure during migration
 
 ### Identity Verification
+
 - ActiveDid migration validates account existence
 - Prevents setting non-existent identities as active
 - Maintains cryptographic integrity
@@ -171,6 +193,7 @@ const result = await this.$db("SELECT * FROM contacts WHERE did = ?", [accountDi
 ## Testing
 
 ### Migration Testing
+
 ```bash
 # Run migration
 npm run migrate
@@ -180,6 +203,7 @@ npm run test:migration
 ```
 
 ### ActiveDid Testing
+
    ```typescript
 // Test activeDid migration specifically
 const result = await migrateActiveDid();
@@ -188,6 +212,7 @@ expect(result.warnings).toContain('Successfully migrated activeDid');
 ```
 
 ### PlatformServiceMixin Testing
+
 ```typescript
 // Test mixin integration
 describe('PlatformServiceMixin', () => {
@@ -224,6 +249,7 @@ describe('PlatformServiceMixin', () => {
    - Verify caching and error handling work correctly
 
 ### Debugging
+
 ```typescript
 // Debug migration process
 import { logger } from '../utils/logger';
@@ -245,6 +271,7 @@ logger.debug('[Migration] Migration completed:', result);
 ## Migration Status Checklist
 
 ### ✅ Completed
+
 - [x] PlatformServiceMixin implementation
 - [x] SQLite database service
 - [x] Migration tools
@@ -253,11 +280,13 @@ logger.debug('[Migration] Migration completed:', result);
 - [x] ActiveDid migration
 
 ### 🔄 In Progress
+
 - [ ] Contact migration
 - [ ] DatabaseUtil to PlatformServiceMixin migration
 - [ ] File-by-file migration
 
 ### ❌ Not Started
+
 - [ ] Legacy Dexie removal
 - [ ] Final cleanup and validation
 
@@ -267,4 +296,4 @@ logger.debug('[Migration] Migration completed:', result);
 **Created**: 2025-07-05
 **Status**: Active Migration Phase
 **Last Updated**: 2025-07-05
-**Note**: Migration fence now implemented through PlatformServiceMixin instead of USE_DEXIE_DB constant 
+**Note**: Migration fence now implemented through PlatformServiceMixin instead of USE_DEXIE_DB constant