Integrate dark theme styling from main branch with Angular Material

- Apply dark blue color scheme (#0f172a, #1e293b, #334155) throughout UI
- Update header with blue gradient and Obsidian branding
- Add missing toolbar buttons: Auto-refresh, Seed Data, Search filter
- Implement action buttons (Download, Delete) in artifacts table
- Add client-side search/filtering functionality
- Update app to support sim_source_id field in database
- Move quickstart scripts to repository root for easier access
- Apply dark theme to tables, tabs, and all Material components

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

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

dev-start.sh

@@ -0,0 +1,89 @@
+#!/bin/bash
+
+set -e
+
+echo "========================================="
+echo "Test Artifact Data Lake - Development Setup"
+echo "========================================="
+echo ""
+
+# Check if Node.js is installed
+if ! command -v node &> /dev/null; then
+    echo "Error: Node.js is not installed. Please install Node.js 18+ first."
+    exit 1
+fi
+
+# Check Node.js version
+NODE_VERSION=$(node --version | cut -d'v' -f2 | cut -d'.' -f1)
+if [ "$NODE_VERSION" -lt "18" ]; then
+    echo "Error: Node.js version 18 or higher is required. Current version: $(node --version)"
+    exit 1
+fi
+
+# Check if npm is installed
+if ! command -v npm &> /dev/null; then
+    echo "Error: npm is not installed. Please install npm first."
+    exit 1
+fi
+
+# Check if Docker is installed for backend services
+if ! command -v docker &> /dev/null; then
+    echo "Error: Docker is not installed. Please install Docker first."
+    exit 1
+fi
+
+# Check if Docker Compose is installed
+if ! command -v docker-compose &> /dev/null; then
+    echo "Error: Docker Compose is not installed. Please install Docker Compose first."
+    exit 1
+fi
+
+echo "✓ Node.js version: $(node --version)"
+echo "✓ npm version: $(npm --version)"
+echo "✓ Docker version: $(docker --version)"
+echo ""
+
+# Create .env file if it doesn't exist
+if [ ! -f .env ]; then
+    echo "Creating .env file from .env.example..."
+    cp .env.example .env
+    echo "✓ .env file created"
+else
+    echo "✓ .env file already exists"
+fi
+
+echo ""
+echo "Starting backend services (PostgreSQL, MinIO, API)..."
+docker-compose up -d postgres minio api
+
+echo ""
+echo "Waiting for backend services to be ready..."
+sleep 10
+
+echo ""
+echo "Installing frontend dependencies..."
+cd frontend
+npm install
+
+echo ""
+echo "========================================="
+echo "Development Environment Ready!"
+echo "========================================="
+echo ""
+echo "Backend API:      http://localhost:8000"
+echo "API Docs:         http://localhost:8000/docs"
+echo "MinIO Console:    http://localhost:9001"
+echo "  Username: minioadmin"
+echo "  Password: minioadmin"
+echo ""
+echo "To start the frontend development server:"
+echo "  cd frontend"
+echo "  npm run start"
+echo ""
+echo "Frontend will be available at: http://localhost:4200"
+echo ""
+echo "To view backend logs: docker-compose logs -f api"
+echo "To stop backend:      docker-compose down"
+echo ""
+echo "Starting frontend development server..."
+npm run start