Fix: Stabilize authentication system with default secrets and better error handling

Deployment: Complete Theme Sync and Gradio Core v3.0 with Zenith limits

Feat: Show attached image in chat and provide local preview

feat: integrate sk-cdx API keys and Qwen3-Coder-480B engine

System Stability Patch: Fix trust proxy, chainable NeDB models, absolute upload paths, and sentinel stack safety

Strategic Migration: Complete NeDB Architecture with Cloud Persistence and Image Recognition Fixes (Clean)

Fix: Use regex for catch-all route to ensure Express 5 compatibility

Fix: Express 5 requirement for named parameters in catch-all route

Fix: Express 5 wildcard compatibility for catch-all route

Fix: Improve routing logic to prevent 404s on custom domains

Permissive: Broaden CORS and relaxed security for iframe support

Add codexai.qzz.io to CORS allowed origins

Allow iframing and update CORS for custom domain embedding

Another One

Update backend/server.js

Update backend/server.js

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