Add AI-powered description generation for video content

Integrates OpenAI API to generate video descriptions using AI, with new API endpoints for single and bulk generation, and a UI button in the admin panel to trigger the process. Includes OpenAI dependency and a new `aiService.ts` file.

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/td5Y4HG

package-lock.json

@@ -80,6 +80,7 @@
         "next-themes": "^0.4.6",
         "node-fetch": "^2.0.0",
         "nodemon": "^3.1.10",
+        "openai": "^5.16.0",
         "openid-client": "^6.7.1",
         "passport": "^0.7.0",
         "passport-local": "^1.0.0",
@@ -9481,6 +9482,27 @@
         "wrappy": "1"
       }
     },
+    "node_modules/openai": {
+      "version": "5.16.0",
+      "resolved": "https://registry.npmjs.org/openai/-/openai-5.16.0.tgz",
+      "integrity": "sha512-hoEH8ZNvg1HXjU9mp88L/ZH8O082Z8r6FHCXGiWAzVRrEv443aI57qhch4snu07yQydj+AUAWLenAiBXhu89Tw==",
+      "license": "Apache-2.0",
+      "bin": {
+        "openai": "bin/cli"
+      },
+      "peerDependencies": {
+        "ws": "^8.18.0",
+        "zod": "^3.23.8"
+      },
+      "peerDependenciesMeta": {
+        "ws": {
+          "optional": true
+        },
+        "zod": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/openid-client": {
       "version": "6.7.1",
       "resolved": "https://registry.npmjs.org/openid-client/-/openid-client-6.7.1.tgz",