chore: clean up lint/type issues and tighten comment media URL validation

lib/video-providers/bunny.ts

@@ -1,4 +1,4 @@
-import type { VideoProvider, VideoMetadata, EmbedOptions, ThumbnailSize } from './types';
+import type { VideoProvider, VideoMetadata, EmbedOptions } from './types';
 import { getCachedMetadata, setCachedMetadata } from './metadata-cache';
 
 // Bunny Stream URL patterns
@@ -43,8 +43,7 @@ export const bunnyProvider: VideoProvider = {
         return `https://iframe.mediadelivery.net/embed/${libraryId}/${videoId}?${params.toString()}`;
     },
 
-    getThumbnailUrl(videoId: string, size: ThumbnailSize = 'medium'): string {
-        const libraryId = process.env.NEXT_PUBLIC_BUNNY_STREAM_LIBRARY_ID || process.env.BUNNY_STREAM_LIBRARY_ID || '0';
+    getThumbnailUrl(videoId: string): string {
         // Bunny stream thumbnails: https://vz-uuid.b-cdn.net/{videoId}/thumbnail.jpg
         // Since we don't have the b-cdn pull zone readily available in pure abstract,
         // we should rely on fetching metadata for actual thumbnails, OR construct via API

lib/video-providers/direct.ts

@@ -1,4 +1,4 @@
-import type { VideoProvider, VideoMetadata, EmbedOptions, ThumbnailSize } from './types';
+import type { VideoProvider, VideoMetadata, EmbedOptions } from './types';
 
 // Direct video URL patterns (for future self-hosted videos)
 const DIRECT_VIDEO_PATTERNS = [
@@ -49,7 +49,8 @@ export const directProvider: VideoProvider = {
     return `${videoId}${queryString ? `#t=${options.startTime}` : ''}`;
   },
 
-  getThumbnailUrl(videoId: string, size: ThumbnailSize = 'medium'): string {
+  getThumbnailUrl(videoId: string): string {
+    void videoId;
     // For direct uploads, thumbnail would be generated server-side
     // Return a placeholder for now
     return '/placeholder-video-thumbnail.png';

lib/video-providers/youtube.ts

@@ -84,7 +84,7 @@ export const youtubeProvider: VideoProvider = {
 
       setCachedMetadata(cacheKey, metadata);
       return metadata;
-    } catch (error) {
+    } catch {
       // Fallback with minimal data
       const fallback: VideoMetadata = {
         title: 'YouTube Video',