Gemini: add model fallback list and GEMINI_MODEL override to avoid 404 NOT_FOUND

Fix Gemini Part.from_text signature (keyword-only)

Fix Gemini google-genai types usage (Content/Part/Blob)

Normalize model selection and show per-file errors when generation fails

Generate graphs even without GT and avoid skipping files when GT JSON missing

Render graphs in HF UI using Mermaid (remove localhost iframe dependency)

Make Neo4j optional on HF (don't crash on DNS/auth) and fix Gemini function regression

Fix Neo4j connection to read from environment variables (HF secrets)

Upgrade Gradio to 5.29.0 to fix /api/info crash causing No API found toast

Fix Gradio 'No API found': replace hidden gr.JSON with gr.State

Fix Gradio /api/info crash: launch with show_api=False

Fix blank UI: correct initial visibility of login/app containers

Fix Pillow: use >=10.2.0 for Python 3.13 wheels

Fix google.genai import: use import google.genai as genai to avoid namespace conflict

Fix PyMuPDF: upgrade to >=1.24.0 for Python 3.13 wheel support

Fix Gradio 5 and neo4j 5 import compatibility

Fix requirements: remove gradio (managed by sdk_version), relax pins

Deploy Doc2GL to HuggingFace Space