# Simplified Magic Link with Watch History Transfer

## Problem Solved
When users click magic links from email apps, their guest watch history couldn't be transferred because the magic link opened in a different browser/session context.

## Simple Solution
The magic link system now includes the 5 most recent watch history items directly in the URL parameter for reliable cross-browser transfer.

## How It Works

### 1. History Generation (WatchHistoryService)
```php
public function generateEncodedHistory(): ?string {
    // Sort by last_watched_at and keep only 5 most recent items
    $recentHistory = array_slice($guestHistory, 0, 5, true);
    return base64_encode(json_encode($recentHistory));
}
```

### 2. Magic Link Generation (MagicLinkController)
```php
$encodedHistory = $watchHistoryService->generateEncodedHistory();
if ($encodedHistory) {
    $enhancedUrl .= '?history=' . urlencode($encodedHistory);
}
```

### 3. Transfer Logic (SetEmailVerifiedOnMagicLinkLogin)
```php
// Try URL parameter transfer first (cross-browser)
$encodedHistory = request()->query('history');
if ($encodedHistory) {
    $transferred = $watchHistoryService->transferEncodedHistoryToUser($user->id, $encodedHistory);
}

// Fallback to session (same browser)
if ($transferred === 0) {
    $transferred = $watchHistoryService->transferGuestHistoryToUser($user->id);
}
```

## Benefits

✅ **Simple & Reliable**: Only 5 items, fits all email clients  
✅ **No Database Overhead**: Pure URL encoding  
✅ **Cross-Browser Compatible**: Works in any context  
✅ **Maintainable**: Clean, focused code  
✅ **Fast**: No database lookups needed  

## URL Example
```
https://domain.com/magiclink/abc123?history=eyJkcmFtYTEyMyI6eyJib29rX2lkIjoi...
Length: ~300-800 chars (email safe)
```