feat(admin): strip HTML in video list + First/Last pagination

- Admin video list: description was stored as sanitized rich HTML, so
  the admin's "{{ Str::limit(description, 55) }}" row printed literal
  <p>…</p> tags in the preview. Pre-strip the HTML, collapse
  whitespace, and surface the full stripped text in a title=""
  tooltip. The visible title column now also carries title="" so the
  admin can hover an ellipsized name to read it in full.
- Shared pagination partial (used by admin videos + users + feed
  pagers) now ships First + Last buttons. The icons use the double-
  chevron variants and the aria-label makes the destination explicit.
  Buttons disable cleanly on page 1 and the last page.
- Audit-logs pager has the same four buttons: First, Prev, N…N, Next,
  Last. Each disabled state carries a title tooltip so the admin
  knows what each stub does without hovering through trial and error.

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

resources/views/admin/videos.blade.php

@@ -125,12 +125,25 @@ $adminNeedsOtp = auth()->user()->two_factor_enabled &&
                                 </div>
                             @endif
                             <div style="min-width:0;">
-                                <div style="font-weight:500;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px;">
+                                {{-- Full title in the title attribute so the
+                                     admin can hover and read the whole thing
+                                     when the visible row ellipsizes. --}}
+                                <div style="font-weight:500;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px;"
+                                     title="{{ $video->title }}">
                                     {{ $video->title }}
                                 </div>
                                 @if($video->description)
-                                <div style="font-size:11px;color:var(--text-2);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px;">
-                                    {{ Str::limit($video->description, 55) }}
+                                @php
+                                    // Descriptions are stored as sanitized rich HTML
+                                    // (see HtmlSanitizer). Blade's {{ }} would show
+                                    // the escaped tags verbatim in the admin table,
+                                    // so strip them to a plain-text preview — and
+                                    // put the full stripped text in the tooltip too.
+                                    $descPlain = trim(preg_replace('/\s+/', ' ', strip_tags((string) $video->description)));
+                                @endphp
+                                <div style="font-size:11px;color:var(--text-2);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px;"
+                                     title="{{ $descPlain }}">
+                                    {{ Str::limit($descPlain, 55) }}
                                 </div>
                                 @endif
                             </div>