Implement minimal native mobile apps for iOS and Android

[Copilot]

Mobile App Implementation for iOS and Android - COMPLETE ✅

Implementation Summary

Successfully created minimal native app implementations for iOS and Android that can be tested on emulators and real devices, as specified in MOBILE_DESIGN.md.

What Was Built

• Go Mobile Package (214 lines)

  • mobile/common.go - Core client management
  • mobile/mobile.go - gomobile-compatible API

• iOS App (301 lines Swift)

  • Complete Xcode project
  • SwiftUI connection form and terminal views
  • Ready for simulator and device testing

• Android App (264 lines Kotlin)

  • Complete Gradle project
  • Jetpack Compose Material 3 UI
  • Ready for emulator and device testing

• Build Infrastructure

  • scripts/build-mobile.sh - Build Go frameworks (fixed for Nix compatibility)
  • scripts/test-mobile.sh - Test on devices
  • Gradle wrapper for Android

• Comprehensive Documentation (2,431 lines across 6 guides)

  • MOBILE_QUICKSTART.md - Quick command reference
  • MOBILE_BUILD.md - Detailed build instructions (updated with Nix troubleshooting)
  • MOBILE_ARCHITECTURE.md - System architecture
  • MOBILE_IMPLEMENTATION_SUMMARY.md - What was implemented
  • MOBILE_TESTING_GUIDE.md - How to test
  • Plus ios/README.md and android/README.md

Recent Fix

Fixed build script to work with Nix package manager by:

• Setting GOMODCACHE and GOCACHE to writable directories
• Creating cache directories before running gomobile
• Added troubleshooting guide for Nix users

Code Statistics

• Total new code: ~2,780 lines
• Existing code modified: 0 lines ✅
• Files created: 28 files
• Platforms: iOS and Android
• Languages: Go, Swift, Kotlin

Quick Start

# Build Go mobile frameworks (now works with Nix!)
./scripts/build-mobile.sh all

# Test iOS (requires macOS + Xcode)
open ios/DikuClient.xcodeproj

# Test Android (requires Android Studio)
cd android && ./gradlew installDebug

Original prompt

Read MOBILE_DESIGN.md and do a minimal implementation for iOS and Android of the native app with the terminal and go code embedded that can be tested on emulators and real devices.

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[anicolao]

@copilot I'm using nix as my package manager, and gomobile is failing:

$ ./scripts/build-mobile.sh all                 
DikuClient Mobile Build Script
================================

Building iOS framework...
/nix/store/lmrl3d9l5akgyrqyxzrybsbpax6l0bdw-gomobile-0-unstable-2024-12-13/bin/gomobile: err: exit status 1: stderr: go: could not create module cache: mkdir /nix/store/lmrl3d9l5akgyrqyxzrybsbpax6l0bdw-gomobile-0-unstable-2024-12-13/pkg: permission denied

[Copilot]

@copilot I'm using nix as my package manager, and gomobile is failing:

$ ./scripts/build-mobile.sh all                 

...

Fixed in commit 4b07d89. The build script now automatically sets GOMODCACHE and GOCACHE to writable directories ($HOME/go/pkg/mod and $HOME/.cache/go-build) before running gomobile, which resolves the permission denied error with Nix-provided gomobile.

The script will create these directories if they don't exist. This should work with both Nix-managed and standard Go installations.