feat: implement Firecrawl web scraping integration

- Add Firecrawl SDK dependency for web scraping functionality
- Create /api/scrape endpoint to handle website content extraction
- Replace mock data with real Firecrawl API integration
- Add recent sources section showing scraped content excerpts
- Update UI to display scraping success/error messages
- Fix API response structure handling for Firecrawl integration

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

docs/business/overview.md

@@ -0,0 +1,13 @@
+# Overview
+This is an AI Podcast Generation app that converts a URL into a natural sounding podcast audio file.
+
+# Core Features
+
+## Scrape Website
+The user enters a URL and the app then use Firecrawl to extract the website content.
+
+## Generate Conversation
+The app then uses the AI SDK v5 (OpenAI gpt-5-mini as the model) to create a conversation between 2 hosts discussing the scraped content.
+
+## Generate Podcast Audio
+Use the Elevenlabs SDK to generate the dialog from the conversation text.