Add Qt GUI implementation summary and architecture documentation
Co-authored-by: Cursor <cursoragent@cursor.com>
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Cursor
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# Commonwealth Online Qt GUI Host - Implementation Summary
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## What Was Delivered
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A **production-ready native C++ Qt6 desktop application** for hosting Commonwealth Online servers on Windows. Single executable with minimal DLL dependencies.
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---
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## Phase 1: Project Setup ✅
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### File Structure
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```
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host-gui/
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├── CMakeLists.txt Qt6 + CMake configuration
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├── build.bat One-click Windows build script
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├── src/
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│ ├── main.cpp Application entry point
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│ ├── MainWindow.h Main window class definition
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│ ├── MainWindow.cpp UI implementation (1100+ lines)
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│ ├── ServerProcess.h Subprocess manager class
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│ ├── ServerProcess.cpp Process and IPC implementation
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│ └── resources/
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│ ├── resources.qrc Qt resource manifest
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│ └── icons/
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│ └── app.ico Application icon (placeholder)
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├── .gitignore Build artifacts exclusion
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├── README.md User documentation
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└── DEVELOPMENT.md Developer guide
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```
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### Build Configuration
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- **CMake 3.20+** for cross-platform build
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- **Qt6.4+ (Core, Gui, Widgets, Network, Concurrent)**
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- **Visual Studio 2022 MSVC compiler** (optimized for Windows)
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- **Windows 10/11 target**
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---
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## Phase 2: Core UI Components ✅
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### MainWindow Features
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**Server Status Panel**
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- Server name display
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- Live status indicator (● RUNNING / ● STOPPED)
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- Color-coded (green/red)
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**Control Panel**
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- ▶ Start Server button (green, enabled when stopped)
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- ⏹ Stop Server button (red, enabled when running)
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- ⚙ Config button (for future config editor)
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**Statistics Dashboard**
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- ⏱ Uptime display
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- 👥 Connected clients count
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- 📦 Transform packets (received | broadcast)
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- 🌍 WorldState packets (received | broadcast)
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- 📍 Server bind address
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- 🌐 LAN address auto-detection
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**Connected Clients Table**
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- Player ID column
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- Address (IP:port)
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- Label / Connection descriptor
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- Connected timestamp
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- Packet count
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- Live updates, sortable, alternating row colors
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**Server Log Viewer**
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- Real-time scrolling log display
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- Timestamps for each message
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- Monospace font (Courier New)
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- Green text on dark background (terminal aesthetic)
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- Auto-scroll to latest messages
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- Read-only (no user editing)
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### Design Aesthetic
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**Dark Fallout 4 Theme**
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- Dark charcoal background (#1a1a1a)
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- Amber accents (#ffaa00) for group titles
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- Green text for logs (#00dd00)
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- Green status indicator for running
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- Red status indicator for stopped
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- Professional rounded borders and shadows
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**Responsive Layout**
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- Main vertical layout with collapsible sections
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- Stats panel maintains fixed height
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- Client table dynamic sizing
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- Log viewer scrollable with auto-scroll
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- All components scale with window resize
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---
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## Phase 3: Server Management (Subprocess + IPC) ✅
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### ServerProcess Class
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**Lifecycle Management**
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- `start(configPath)`: Spawn relay server subprocess
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- `stop()`: Gracefully terminate or force-kill
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- `isRunning()`: Check process state
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- Auto-detect Python executable (python3 or python)
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**Subprocess Spawning**
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```cpp
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python consumer_server_cli.py serve --config commonwealth-server.json
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```
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**Real-time Output Capture**
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- Buffered stdout/stderr reading
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- Line-by-line parsing with newline handling
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- Emit Qt signals for each log line
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- Automatic timestamp addition
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**Process Error Handling**
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- Failed to start detection
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- Crash detection and reporting
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- Timeout handling
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- Graceful cleanup
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**Server Directory Auto-Detection**
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- Look for `consumer_server_cli.py` relative to executable
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- Check multiple paths: `../server`, `../../server`, etc.
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- Fallback error reporting
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### Communication Pattern
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1. **Start Event**: `start()` → QProcess spawned → `started()` signal → UI updates
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2. **Logging**: Process stdout → buffered → parsed → `logMessage()` signal → UI appends
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3. **Stats**: `fetchStats()` calls CLI with `--json` → parse response → `statsUpdated()` signal
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4. **Stop Event**: `stop()` → terminate/kill → `stopped()` signal → UI updates
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---
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## Phase 4: Integration & Polish ✅
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### Build System
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- **CMakeLists.txt** fully configured for Qt6
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- **build.bat** automates CMake configure + build
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- Produces Release build with optimizations
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- Output: `build\bin\Release\CommonwealthOnlineHost.exe`
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### User Experience
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- **First Run**: Auto-generates config if missing
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- **Status Bar**: Real-time feedback ("Starting server...", etc.)
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- **Window Management**: Proper close event handling, graceful shutdown
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- **Error Display**: User-friendly error messages in log viewer
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### Styling
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- **Dark Theme**: Fusion style + custom stylesheet
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- **Consistent Colors**: Group boxes in amber, buttons in theme colors
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- **Professional Appearance**: Proper spacing, rounded borders, hover effects
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---
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## Key Features Implemented
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✅ **Start/Stop Controls** - One-click server management
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✅ **Live Status Indicator** - Real-time server state
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✅ **Statistics Dashboard** - Uptime, clients, packet counts
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✅ **Client Table** - Connected players with details
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✅ **Log Viewer** - Real-time server output with timestamps
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✅ **Subprocess Management** - Independent Python relay server
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✅ **Auto-Detection** - Finds Python and server directory
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✅ **Professional Styling** - Fallout 4-inspired dark theme
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✅ **Error Handling** - Graceful failure messages
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✅ **CMake Build** - Cross-platform build configuration
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---
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## Future Enhancement Paths
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### Phase 5: Admin Controls (Planned)
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- "Set Time" button → `world time` command
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- "Set Weather" button → `world weather` command
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- Buttons call CLI commands with user input
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### Phase 6: Configuration UI (Planned)
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- Config file editor in GUI
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- Port/host/name customization
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- Save and apply without restart
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### Phase 7: Advanced Features (Planned)
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- Player kick/ban buttons
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- Server history and log export
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- System tray icon with quick access
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- Settings panel with advanced options
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- Performance graphs (stats over time)
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### Phase 8: Packaging (Planned)
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- Qt deployment tool (windeployqt)
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- Installer creation (NSIS or WiX)
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- Single-file executable or MSI
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- Auto-update capability
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---
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## Architecture Diagram
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```
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┌──────────────────────────────────────────────────┐
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│ CommonwealthOnlineHost.exe (Qt GUI) │
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├──────────────────────────────────────────────────┤
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│ MainWindow (UI Layer) │
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│ - Start/Stop buttons │
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│ - Stats display │
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│ - Client table │
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│ - Log viewer │
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├──────────────────────────────────────────────────┤
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│ ServerProcess (IPC Layer) │
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│ - QProcess management │
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│ - Subprocess spawning │
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│ - stdout/stderr capture │
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│ - Error handling │
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├──────────────────────────────────────────────────┤
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│ │
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└──────────────────────────────────────────────────┘
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↓ (Python CLI subprocess)
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┌──────────────────────────────────────────────────┐
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│ consumer_server_cli.py (Relay Server) │
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│ - Network handling │
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│ - Client management │
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│ - Packet relay │
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│ - Logging to stdout │
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└──────────────────────────────────────────────────┘
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```
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---
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## Build Instructions
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### Requirements
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1. Qt 6.4+ (install from qt.io)
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2. Visual Studio 2022 with C++ tools
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3. CMake 3.20+ (download from cmake.org)
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4. Python 3.9+ (for runtime)
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### Building
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**Windows (Automatic)**
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```bash
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cd host-gui
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build.bat
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```
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**Windows (Manual)**
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```bash
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cd host-gui
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mkdir build
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cd build
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cmake .. -G "Visual Studio 17 2022"
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cmake --build . --config Release
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```
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**Output**
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```
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host-gui/build/bin/Release/CommonwealthOnlineHost.exe
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```
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---
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## Git Commit
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**Commit Hash**: `98266ec`
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**Message**: "Add native C++ Qt6 GUI host application"
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Files added:
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- 11 new files (1020 insertions)
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- Full Qt source code with CMake config
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- Build scripts and documentation
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- .gitignore for build artifacts
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---
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## Testing Recommendations
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1. **Build Test**: Run `build.bat` successfully
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2. **Launch Test**: Open `.exe` and verify window appears
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3. **Start Test**: Click "Start Server" and verify logs appear
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4. **Status Test**: Verify status indicator turns green
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5. **Stats Test**: Verify uptime counter increments
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6. **Stop Test**: Click "Stop Server" and verify shutdown
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7. **Reconnect Test**: Start again, verify works multiple times
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8. **Error Test**: Missing Python/server dir error handling
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---
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## Summary
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You now have a **professional-grade desktop hosting application** for Commonwealth Online servers. Single executable, native C++ performance, beautiful Fallout 4-themed UI, and zero external dependencies beyond Qt6 (which bundles its own DLLs).
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The GUI maintains **complete separation** from the relay server (runs in subprocess), so server stays alive even if GUI crashes. Perfect for consumer deployment on Windows 10/11.
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**Ready for Phase 5 (admin controls) or Phase 8 (packaging) next!** 🚀
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