Improve AI video description generation and error handling

Enhance AI video description generation by adding detailed error logging in `aiService.ts` and implementing debug logs within `routes.ts` to track video processing and description generation.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 170e18f0-0f13-4eca-8643-546bba1dd8cc
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/170e18f0-0f13-4eca-8643-546bba1dd8cc/LY6xmBI

server/routes.ts

@@ -1089,12 +1089,17 @@ export async function registerRoutes(app: Express): Promise<Server> {
       const videoId = req.params.id;
       const { maxCharacters = 500, includeArtistInfo = true, includeLabelInfo = true } = req.body;
       
+      console.log("AI description request for video:", videoId); // Debug log
+      
       // Get video details
       const video = await storage.getVideo(videoId);
       if (!video) {
+        console.log("Video not found:", videoId); // Debug log
         return res.status(404).json({ message: "Video not found" });
       }
       
+      console.log("Generating AI description for title:", video.title); // Debug log
+      
       // Generate description using AI
       const description = await generateVideoDescription(video.title, {
         maxCharacters,
@@ -1103,6 +1108,8 @@ export async function registerRoutes(app: Express): Promise<Server> {
         includeLabelInfo
       });
       
+      console.log("Generated description:", description); // Debug log
+      
       const result = { 
         description,
         title: video.title,