feat(admin): DB-driven storage sum + grouped error log viewer

Storage:
- The dashboard storage card used to walk Storage::disk('public')'s
  videos / thumbnails / avatars / images directories. NAS is primary
  storage, so for every file that's been pushed-and-purged (most of
  them, per CLAUDE.md), the disk walk reports 0. Replace with a
  DB-driven estimate: SUM(videos.size) for video bytes plus a 120 KB
  conservative per-file estimate × (thumbnails + avatars + banners +
  post images). Fast (3 count queries + one SUM), works regardless
  of local-cache state, and now reflects content that lives on NAS.

Error logs:
- Flat view used to render every line as its own equal-weight <div>,
  so a stack trace of 70 frames buried the next real event. Group
  lines by header: a line that matches .(ERROR|WARNING|INFO|DEBUG|
  CRITICAL|…): starts a new group; subsequent lines belong to its
  stack trace. Each group collapses by default behind a caret the
  admin can expand. Stack-trace lines preserve their natural #0 → #N
  order inside the group even when the file is reversed newest-first.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

app/Http/Controllers/SuperAdminController.php

@@ -188,16 +188,27 @@ class SuperAdminController extends Controller
         $recentVideos = Video::with('user')->latest()->take(5)->get();
 
         // ── Storage ───────────────────────────────────────────────
-        $disk = Storage::disk('public');
+        // NAS is the primary store; walking the local disk here would miss
+        // every file that's been pushed to NAS and purged locally. We use
+        // the DB-captured file sizes instead: videos.size is set at upload
+        // time, and thumbnail / avatar counts × a rough per-file average
+        // give us a usable picture. True NAS-side bytes could be queried
+        // with `smbclient du`, but that's slow and locks the dashboard; the
+        // DB figure is accurate for everything uploaded through this app.
+        $sizeVideos      = (int) Video::sum('size'); // bytes
+        $thumbnailCount  = Video::whereNotNull('thumbnail')->count();
+        $avatarCount     = User::whereNotNull('avatar')->count();
+        $bannerCount     = User::whereNotNull('banner')->count();
+        $postImageCount  = \DB::table('post_images')->count();
 
-        $sizeVideos     = $this->dirSize($disk, 'videos');
-        $sizeThumbnails = $this->dirSize($disk, 'thumbnails');
-        $sizeAvatars    = $this->dirSize($disk, 'avatars');
-        $sizeImages     = $this->dirSize($disk, 'images');
-        $totalPublicSize = $sizeVideos + $sizeThumbnails + $sizeAvatars + $sizeImages;
+        // Images are variable but ~120 KB is a solid conservative estimate
+        // for a web-sized JPEG/PNG upload.
+        $sizeImages     = ($thumbnailCount + $avatarCount + $bannerCount + $postImageCount) * 120 * 1024;
+        $sizeThumbnails = $thumbnailCount * 120 * 1024;
+        $sizeAvatars    = $avatarCount * 120 * 1024;
+        $totalPublicSize = $sizeVideos + $sizeImages;
         $videosUsagePercent = $totalPublicSize > 0 ? round(($sizeVideos / $totalPublicSize) * 100, 1) : 0;
 
-        // Convert to MB
         $toMb = fn($b) => round($b / 1024 / 1024, 1);
         $storage = [
             'videos'     => $toMb($sizeVideos),