Sync KV-cached model.py to backend models directory

Implement KV caching for O(N) generation and speedups

Update frontend Summarizer UI to Claude-like design with sharp corners and prioritize local backend models

Fix NameError backend_dir missing

Fix static folder crash when running API separately

Convert absolute module imports to relative to support Docker environments

Fix python import path resolution

Deploy: Prepare codebase for Hugging Face Spaces

feat(backend): add reddit proxy endpoint for data buckets

feat(backend): add dynamic parameters to generate endpoint