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.ps1

@@ -0,0 +1,156 @@
+[CmdletBinding()]
+param(
+    [switch]$Help
+)
+
+$ErrorActionPreference = "Stop"
+
+if ($Help) {
+    Write-Host "=========================================" -ForegroundColor Cyan
+    Write-Host "Test Artifact Data Lake - Development Setup" -ForegroundColor Cyan
+    Write-Host "=========================================" -ForegroundColor Cyan
+    Write-Host ""
+    Write-Host "Usage: .\dev-start.ps1 [OPTIONS]" -ForegroundColor White
+    Write-Host ""
+    Write-Host "Options:" -ForegroundColor Yellow
+    Write-Host "  -Help         Show this help message" -ForegroundColor White
+    Write-Host ""
+    Write-Host "This script starts backend services and frontend development server." -ForegroundColor Green
+    Write-Host ""
+    exit 0
+}
+
+Write-Host "=========================================" -ForegroundColor Cyan
+Write-Host "Test Artifact Data Lake - Development Setup" -ForegroundColor Cyan
+Write-Host "=========================================" -ForegroundColor Cyan
+Write-Host ""
+
+# Check if Node.js is installed
+if (-not (Get-Command "node" -ErrorAction SilentlyContinue)) {
+    Write-Host "Error: Node.js is not installed. Please install Node.js 18+ first." -ForegroundColor Red
+    Write-Host "Visit: https://nodejs.org/" -ForegroundColor Yellow
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+
+# Check Node.js version
+try {
+    $nodeVersion = & node --version
+    $majorVersion = [int]($nodeVersion -replace 'v(\d+)\..*', '$1')
+    if ($majorVersion -lt 18) {
+        Write-Host "Error: Node.js version 18 or higher is required. Current version: $nodeVersion" -ForegroundColor Red
+        Read-Host "Press Enter to exit"
+        exit 1
+    }
+    Write-Host "[OK] Node.js version: $nodeVersion" -ForegroundColor Green
+}
+catch {
+    Write-Host "Error: Failed to check Node.js version" -ForegroundColor Red
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+
+# Check if npm is installed
+if (-not (Get-Command "npm" -ErrorAction SilentlyContinue)) {
+    Write-Host "Error: npm is not installed. Please install npm first." -ForegroundColor Red
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+
+$npmVersion = & npm --version
+Write-Host "[OK] npm version: $npmVersion" -ForegroundColor Green
+
+# Check if Docker is installed
+if (-not (Get-Command "docker" -ErrorAction SilentlyContinue)) {
+    Write-Host "Error: Docker is not installed. Please install Docker Desktop first." -ForegroundColor Red
+    Write-Host "Visit: https://www.docker.com/products/docker-desktop" -ForegroundColor Yellow
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+
+# Check if Docker Compose is available
+$ComposeCmd = $null
+if (Get-Command "docker-compose" -ErrorAction SilentlyContinue) {
+    $ComposeCmd = "docker-compose"
+} else {
+    try {
+        & docker compose version | Out-Null
+        $ComposeCmd = "docker compose"
+    }
+    catch {
+        Write-Host "Error: Docker Compose is not available." -ForegroundColor Red
+        Write-Host "Please ensure Docker Desktop is running." -ForegroundColor Yellow
+        Read-Host "Press Enter to exit"
+        exit 1
+    }
+}
+
+Write-Host "[OK] Docker Compose command: $ComposeCmd" -ForegroundColor Green
+Write-Host ""
+
+# Create .env file if it doesn't exist
+if (-not (Test-Path ".env")) {
+    Write-Host "Creating .env file from .env.example..." -ForegroundColor Yellow
+    Copy-Item ".env.example" ".env"
+    Write-Host "[OK] .env file created" -ForegroundColor Green
+} else {
+    Write-Host "[OK] .env file already exists" -ForegroundColor Green
+}
+
+Write-Host ""
+Write-Host "Starting backend services (PostgreSQL, MinIO, API)..." -ForegroundColor Yellow
+
+# Start backend services
+try {
+    if ($ComposeCmd -eq "docker compose") {
+        & docker compose up -d postgres minio api
+    } else {
+        & docker-compose up -d postgres minio api
+    }
+}
+catch {
+    Write-Host "Error: Failed to start backend services." -ForegroundColor Red
+    Write-Host "Make sure Docker Desktop is running." -ForegroundColor Yellow
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+
+Write-Host ""
+Write-Host "Waiting for backend services to be ready..." -ForegroundColor Yellow
+Start-Sleep -Seconds 10
+
+Write-Host ""
+Write-Host "Installing frontend dependencies..." -ForegroundColor Yellow
+Set-Location "frontend"
+
+try {
+    & npm install
+    Write-Host "[OK] Frontend dependencies installed" -ForegroundColor Green
+}
+catch {
+    Write-Host "Error: Failed to install frontend dependencies" -ForegroundColor Red
+    Set-Location ".."
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+
+Write-Host ""
+Write-Host "=========================================" -ForegroundColor Cyan
+Write-Host "Development Environment Ready!" -ForegroundColor Green
+Write-Host "=========================================" -ForegroundColor Cyan
+Write-Host ""
+Write-Host "Backend API:      http://localhost:8000" -ForegroundColor White
+Write-Host "API Docs:         http://localhost:8000/docs" -ForegroundColor White
+Write-Host "MinIO Console:    http://localhost:9001" -ForegroundColor White
+Write-Host "  Username: minioadmin" -ForegroundColor Gray
+Write-Host "  Password: minioadmin" -ForegroundColor Gray
+Write-Host ""
+Write-Host "Frontend will be available at: http://localhost:4200" -ForegroundColor White
+Write-Host ""
+Write-Host "To view backend logs: $ComposeCmd logs -f api" -ForegroundColor Yellow
+Write-Host "To stop backend:      $ComposeCmd down" -ForegroundColor Yellow
+Write-Host ""
+Write-Host "Starting frontend development server..." -ForegroundColor Green
+
+# Start the frontend development server
+& npm run start