Improve AI description generation to handle different content types

Update the AI service to allow specifying content type (e.g., 'oddaja' for shows) and adjust prompts accordingly to generate more relevant descriptions for various media formats.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 2cd2c0bc-434c-4bc9-ad3f-b99d3897a0d1
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/2cd2c0bc-434c-4bc9-ad3f-b99d3897a0d1/n7jzC7R

server/routes.ts

@@ -1108,7 +1108,8 @@ export async function registerRoutes(app: Express): Promise<Server> {
         language: "german",
         includeArtistInfo,
         includeLabelInfo,
-        customInstructions
+        customInstructions,
+        contentType: video.contentType || 'music_video'
       });
       
       console.log("Generated description:", description); // Debug log