Add fields for video episode details and tags for shows

Updates `client/src/pages/admin.tsx` to include inputs for `filename`, `episodeNumber`, `episodeTitle`, and `tags`. Modifies `server/storage.ts` to include these fields in `MemStorage` and `shared/schema.ts` to add these columns to the `videos` table in PostgreSQL.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 170e18f0-0f13-4eca-8643-546bba1dd8cc
Replit-Commit-Checkpoint-Type: full_checkpoint
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shared/schema.ts

@@ -12,6 +12,9 @@ export const videos = pgTable("videos", {
   title: text("title").notNull(),
   artist: text("artist"), // Izvajalec/Artist name
   description: text("description").default("").notNull(),
+  filename: text("filename"), // Original file name from Bunny.net
+  episodeNumber: integer("episode_number"), // For shows like "Folx Stadl"
+  episodeTitle: text("episode_title"), // Episode title for shows
   thumbnailUrl: text("thumbnail_url").notNull(),
   customThumbnailUrl: text("custom_thumbnail_url"),
   faceCenterPosition: text("face_center_position"), // CSS object-position for face centering