🗑️ chore: Remove YouTube API integration (#11331)

* 🗑️ refactor: Remove YouTube API integration and related configurations as it's broken and should be integrated via MCP instead. Currently there seems not to be a single MCP out there with working get_transcript methods for months. API seems to have changed and there are no maintainers on these projects. We will work out something soon an MCP solution

- Deleted YouTube API key and related configurations from .env.example.
- Removed YouTube tools and their references from the API client, including the manifest and structured files.
- Updated package.json to remove YouTube-related dependencies.
- Cleaned up toolkit exports by removing YouTube toolkit references.

* chore: revert package removal to properly remove packages

* 🗑️ refactor: Remove YouTube API and related dependencies due to integration issues

---------

Co-authored-by: Danny Avila <danny@librechat.ai>

packages/api/src/tools/toolkits/index.ts

@@ -1,4 +1,3 @@
 export * from './gemini';
 export * from './imageContext';
 export * from './oai';
-export * from './yt';

packages/api/src/tools/toolkits/yt.ts

@@ -1,61 +0,0 @@
-import { z } from 'zod';
-export const ytToolkit = {
-  youtube_search: {
-    name: 'youtube_search' as const,
-    description: `Search for YouTube videos by keyword or phrase.
-- Required: query (search terms to find videos)
-- Optional: maxResults (number of videos to return, 1-50, default: 5)
-- Returns: List of videos with titles, descriptions, and URLs
-- Use for: Finding specific videos, exploring content, research
-Example: query="cooking pasta tutorials" maxResults=3` as const,
-    schema: z.object({
-      query: z.string().describe('Search query terms'),
-      maxResults: z.number().int().min(1).max(50).optional().describe('Number of results (1-50)'),
-    }),
-  },
-  youtube_info: {
-    name: 'youtube_info' as const,
-    description: `Get detailed metadata and statistics for a specific YouTube video.
-- Required: url (full YouTube URL or video ID)
-- Returns: Video title, description, view count, like count, comment count
-- Use for: Getting video metrics and basic metadata
-- DO NOT USE FOR VIDEO SUMMARIES, USE TRANSCRIPTS FOR COMPREHENSIVE ANALYSIS
-- Accepts both full URLs and video IDs
-Example: url="https://youtube.com/watch?v=abc123" or url="abc123"` as const,
-    schema: z.object({
-      url: z.string().describe('YouTube video URL or ID'),
-    }),
-  } as const,
-  youtube_comments: {
-    name: 'youtube_comments',
-    description: `Retrieve top-level comments from a YouTube video.
-- Required: url (full YouTube URL or video ID)
-- Optional: maxResults (number of comments, 1-50, default: 10)
-- Returns: Comment text, author names, like counts
-- Use for: Sentiment analysis, audience feedback, engagement review
-Example: url="abc123" maxResults=20`,
-    schema: z.object({
-      url: z.string().describe('YouTube video URL or ID'),
-      maxResults: z
-        .number()
-        .int()
-        .min(1)
-        .max(50)
-        .optional()
-        .describe('Number of comments to retrieve'),
-    }),
-  } as const,
-  youtube_transcript: {
-    name: 'youtube_transcript',
-    description: `Fetch and parse the transcript/captions of a YouTube video.
-- Required: url (full YouTube URL or video ID)
-- Returns: Full video transcript as plain text
-- Use for: Content analysis, summarization, translation reference
-- This is the "Go-to" tool for analyzing actual video content
-- Attempts to fetch English first, then German, then any available language
-Example: url="https://youtube.com/watch?v=abc123"`,
-    schema: z.object({
-      url: z.string().describe('YouTube video URL or ID'),
-    }),
-  } as const,
-} as const;