feat: complete pre-launch audit — frontend polish, churn prevention, login history, financial reports, configurable checkout

Includes all work from phases 6-9+ and frontend polish rounds 1 & 2:

- Login history with device trust, new device notifications, session management
- Churn prevention: cancellation surveys, winback campaigns with email sequences
- Financial reports: revenue, P&L, tax, aging, refund, subscription reports with PDF/CSV/JSON export
- Configurable checkout: plan config groups/options, build-your-own VPS
- Frontend polish: fix broken legal links, add SEO meta tags, favicon, font display=swap,
  Head titles on all 14 marketing pages, mobile responsive fixes, AuthLayout legal footer,
  remove false 24/7 claims, hide empty stats, correct uptime SLA to 99.9%,
  GameServers notify buttons linked to /contact, 301 redirects for /terms and /privacy
- WHMCS migration scripts
- Update legal page effective dates to March 16, 2026

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/whmcs-migrate/src/Logger.php

@@ -0,0 +1,79 @@
+<?php
+
+declare(strict_types=1);
+
+namespace WhmcsMigrate;
+
+use Monolog\Formatter\LineFormatter;
+use Monolog\Handler\StreamHandler;
+use Monolog\Level;
+use Monolog\Logger as MonologLogger;
+
+final class Logger
+{
+    private MonologLogger $logger;
+
+    public function __construct(string $logDir, string $level = 'info')
+    {
+        if (! is_dir($logDir)) {
+            mkdir($logDir, 0755, true);
+        }
+
+        $this->logger = new MonologLogger('whmcs-migrate');
+
+        $monologLevel = Level::fromName($level);
+
+        // File handler — detailed format
+        $fileFormatter = new LineFormatter(
+            format: "[%datetime%] %level_name%: %message% %context%\n",
+            dateFormat: 'Y-m-d H:i:s',
+            allowInlineLineBreaks: true,
+            ignoreEmptyContextAndExtra: true,
+        );
+
+        $fileHandler = new StreamHandler($logDir . '/migration.log', $monologLevel);
+        $fileHandler->setFormatter($fileFormatter);
+        $this->logger->pushHandler($fileHandler);
+
+        // Console handler — colorized
+        $consoleFormatter = new LineFormatter(
+            format: "%level_name%: %message% %context%\n",
+            dateFormat: null,
+            allowInlineLineBreaks: true,
+            ignoreEmptyContextAndExtra: true,
+        );
+
+        $consoleHandler = new StreamHandler('php://stdout', $monologLevel);
+        $consoleHandler->setFormatter($consoleFormatter);
+        $this->logger->pushHandler($consoleHandler);
+    }
+
+    public function info(string $message, array $context = []): void
+    {
+        $this->logger->info($message, $context);
+    }
+
+    public function warning(string $message, array $context = []): void
+    {
+        $this->logger->warning($message, $context);
+    }
+
+    public function error(string $message, array $context = []): void
+    {
+        $this->logger->error($message, $context);
+    }
+
+    public function debug(string $message, array $context = []): void
+    {
+        $this->logger->debug($message, $context);
+    }
+
+    /**
+     * Log a visual section separator.
+     */
+    public function section(string $title): void
+    {
+        $separator = str_repeat('=', 60);
+        $this->info("\n{$separator}\n{$title}\n{$separator}");
+    }
+}