Add loading overlay to runtime logs to prevent flicker during refresh

Shows a subtle loading indicator over the logs container during refresh
or when enabling streaming. This masks any brief visual glitches from
Livewire's DOM morphing when log content changes significantly.

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

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

resources/views/livewire/project/shared/get-logs.blade.php

@@ -391,7 +391,7 @@
                                 class="text-gray-500 dark:text-gray-400 py-2">
                                 No matches found.
                             </div>
-                            @foreach ($displayLines as $line)
+                            @foreach ($displayLines as $index => $line)
                                 @php
                                     // Parse timestamp from log line (ISO 8601 format: 2025-12-04T11:48:39.136764033Z)
                                     $timestamp = '';
@@ -411,8 +411,10 @@
                                         // Format: 2025-Dec-04 09:44:58.198879
                                         $timestamp = "{$year}-{$monthName}-{$day} {$time}.{$microseconds}";
                                     }
+                                    // Use timestamp for stable key (unique per log line)
+                                    $lineKey = $timestamp ?: 'line-' . $index;
                                 @endphp
-                                <div data-log-line data-log-content="{{ $line }}" class="flex gap-2 log-line">
+                                <div wire:key="{{ $lineKey }}" data-log-line data-log-content="{{ $line }}" class="flex gap-2 log-line">
                                     @if ($timestamp && $showTimeStamps)
                                         <span class="shrink-0 text-gray-500">{{ $timestamp }}</span>
                                     @endif