Initial commit: 3D Viewer application

Features:
- Vue 3 frontend with Three.js/Online3DViewer
- Node.js API with PostgreSQL and Redis
- Python worker for model conversion
- Docker Compose for deployment
- ViewCube navigation with drag rotation and 90° snap
- Cross-section, exploded view, and render settings
- Parts tree with visibility controls

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

start.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+# 3D Viewer Startup Script
+# Automatically detects the host IP address for network access
+
+set -e
+
+# Detect the host IP address
+detect_ip() {
+    local ip=""
+
+    # macOS
+    if [[ "$OSTYPE" == "darwin"* ]]; then
+        # Try en0 (Wi-Fi) first, then en1 (Ethernet)
+        ip=$(ipconfig getifaddr en0 2>/dev/null || ipconfig getifaddr en1 2>/dev/null || echo "")
+    # Linux
+    else
+        # Get the first non-localhost IP
+        ip=$(hostname -I 2>/dev/null | awk '{print $1}' || echo "")
+    fi
+
+    # Fallback to localhost if no IP found
+    if [[ -z "$ip" ]]; then
+        ip="localhost"
+    fi
+
+    echo "$ip"
+}
+
+# Main
+export HOST_IP=$(detect_ip)
+
+echo "========================================"
+echo "  3D Viewer Startup"
+echo "========================================"
+echo ""
+echo "Detected HOST_IP: $HOST_IP"
+echo ""
+
+# Check if we need to rebuild frontend (first time or --rebuild flag)
+if [[ "$1" == "--rebuild" ]] || [[ "$1" == "-r" ]]; then
+    echo "Rebuilding frontend..."
+    docker compose build --no-cache frontend
+fi
+
+# Stop existing containers
+echo "Stopping existing containers..."
+docker compose down
+
+# Start all services
+echo "Starting services..."
+docker compose up -d
+
+echo ""
+echo "========================================"
+echo "  3D Viewer is running!"
+echo "========================================"
+echo ""
+echo "  Local access:   http://localhost"
+echo "  Network access: http://$HOST_IP"
+echo ""
+echo "  MinIO Console:  http://$HOST_IP:9001"
+echo "  API Health:     http://$HOST_IP:4000/api/health"
+echo ""
+echo "To view logs:     docker compose logs -f"
+echo "To stop:          docker compose down"
+echo ""