Update backend server to handle Webflow GraphQL endpoints and CSRF tokens, serve static files correctly, and use 0.0.0.0 host. Add a compatibility script for frontend Webflow e-commerce issues and update HTML files to include it.
Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 375ec6d3-d5af-4f82-ab81-5c60fd4a86a3
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: 05dda85a-ad24-46c8-b27e-50c860b4dd57
Replit-Helium-Checkpoint-Created: true
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