feat: implement web server mode

Add comprehensive web server functionality to Claudia, enabling Claude
Code execution from mobile browsers while maintaining feature parity
with the desktop Tauri app.

Enable users to access Claude Code from mobile devices via web browser,
addressing the limitation of desktop-only access. This allows for:
- Mobile development workflows
- Remote access to Claude Code functionality
- Browser-based Claude execution without desktop app installation
- Cross-platform compatibility

- **Axum web server** with WebSocket support for real-time streaming
- **Dual-mode event system** supporting both Tauri desktop and DOM web
  events
- **Session management** with HashMap-based tracking of active WebSocket
  connections
- **Process spawning** for actual Claude binary execution with stdout
  streaming
- **REST API** mirroring all Tauri command functionality

- `web_server.rs`: Main server w/ WebSocket handlers and REST endpoints
- Real Claude binary execution with subprocess spawning
- WebSocket message streaming for real-time output
- Comprehensive session state management
- CORS configuration for mobile browser access

- `apiAdapter.ts`: Environment detection and unified API layer
- `ClaudeCodeSession.tsx`: Enhanced with DOM event support for web mode
- WebSocket client with automatic failover from Tauri to web mode
- Event dispatching system compatible with existing UI components

- **Build system**: `just web` command for integrated build and run
- **Binary detection**: Bundled binary first, system PATH fallback
- **Message protocol**: JSON-based WebSocket communication
- **Event handling**: Session-scoped and generic event dispatching
- **Error handling**: Comprehensive error propagation and UI feedback

- ✅ Basic WebSocket streaming and session management
- ✅ REST API endpoints for all core functionality
- ✅ Event handling compatibility between Tauri and web modes
- ✅ Error handling and WebSocket connection management
- ✅ Process spawning and output streaming
- ✅ Comprehensive debugging and tracing

- Session-scoped event dispatching needs refinement for multi-user
  scenarios
- Process cancellation requires additional implementation
- stderr handling not yet fully implemented
- Limited to single concurrent session per connection

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: 2 people

bun.lockb

@@ -0,0 +1,96 @@
+# Claudia - NixOS Build & Development Commands
+
+# Show available commands
+default:
+    @just --list
+
+# Enter the Nix development environment
+shell:
+    nix-shell
+
+# Install frontend dependencies
+install:
+    npm install
+
+# Build the React frontend
+build-frontend:
+    npm run build
+
+# Build the Tauri backend (debug)
+build-backend:
+    cd src-tauri && cargo build
+
+# Build the Tauri backend (release)
+build-backend-release:
+    cd src-tauri && cargo build --release
+
+# Build everything (frontend + backend)
+build: install build-frontend build-backend
+
+# Run the application in development mode
+run: build-frontend
+    cd src-tauri && cargo run
+
+# Run the application (release mode)
+run-release: build-frontend build-backend-release
+    cd src-tauri && cargo run --release
+
+# Clean all build artifacts
+clean:
+    rm -rf node_modules dist
+    cd src-tauri && cargo clean
+
+# Development server (requires frontend build first)
+dev: build-frontend
+    cd src-tauri && cargo run
+
+# Run tests
+test:
+    cd src-tauri && cargo test
+
+# Format Rust code
+fmt:
+    cd src-tauri && cargo fmt
+
+# Check Rust code
+check:
+    cd src-tauri && cargo check
+
+# Quick development cycle: build frontend and run
+quick: build-frontend
+    cd src-tauri && cargo run
+
+# Full rebuild from scratch
+rebuild: clean build run
+
+# Run web server mode for phone access
+web: build-frontend
+    cd src-tauri && cargo run --bin claudia-web
+
+# Run web server on custom port
+web-port PORT: build-frontend
+    cd src-tauri && cargo run --bin claudia-web -- --port {{PORT}}
+
+# Get local IP for phone access
+ip:
+    @echo "🌐 Your PC's IP addresses:"
+    @ip route get 1.1.1.1 | grep -oP 'src \K\S+' || echo "Could not detect IP"
+    @echo ""
+    @echo "📱 Use this IP on your phone: http://YOUR_IP:8080"
+
+# Show build information
+info:
+    @echo "🚀 Claudia - Claude Code GUI Application"
+    @echo "Built for NixOS without Docker"
+    @echo ""
+    @echo "📦 Frontend: React + TypeScript + Vite"
+    @echo "🦀 Backend: Rust + Tauri"
+    @echo "🏗️  Build System: Nix + Just"
+    @echo ""
+    @echo "💡 Common commands:"
+    @echo "  just run      - Build and run (desktop)"
+    @echo "  just web      - Run web server for phone access"
+    @echo "  just quick    - Quick build and run"
+    @echo "  just rebuild  - Full clean rebuild"
+    @echo "  just shell    - Enter Nix environment"
+    @echo "  just ip       - Show IP for phone access"