docs(technical-summary): add comprehensive technical summary documentation detailing system architecture, components, protocols, and deployment

[jakenuts]

Summary

• Added comprehensive technical summary document (TECHNICAL_SUMMARY.md) optimized for LLM agent consumption
• Documents the three-component Happy ecosystem architecture (CLI, server, mobile app)
• Provides detailed information about voice feature implementation and troubleshooting

What's Included

• System Architecture: Visual diagram and component descriptions
• Communication Protocols: WebSocket, authentication, E2E encryption details
• API Specifications: All key endpoints and message formats
• Voice Feature Analysis: Current implementation and issue diagnosis
• Self-Hosting Guide: Infrastructure requirements and configuration
• Database Schema: Key Prisma models
• Security Model: Zero-knowledge encryption details
• Critical File References: Navigation aid for both repositories

Purpose

This document provides LLM coding agents with complete context to:

• Understand the Happy ecosystem architecture
• Experiment with solutions for the voice recognition issue
• Navigate both the happy-cli and happy-server repositories effectively
• Self-host the infrastructure if needed

The format is optimized for efficient context usage while preserving all critical technical details.

🤖 Generated with Claude Code