fix: eliminate leaderboard freeze by removing gr.State and reactive .change() handlers

fix: resolve frontend freeze on tab switch (Gradio resize loop and vis-network)

refactor: apply SOLID principles to validator logic and remove magic strings/numbers

perf: fix UI freeze on tab switch and cache graph topology

fix: resolve frontend freeze during tab switching

feat: add interactive node info to vis-network graph

feat: enforce non-zero flow and add sample submission

feat: add Date column and Status filtering to leaderboard

feat: add CSV support for submissions and flow table visualization

clean up codebase: remove unused files, dependencies and simplify core UI logic

feat: migrate to persistent HF Bucket storage mounting

refactor: remove gradio_leaderboard and upgrade to latest Gradio 6 for MCP support

Update graph_viewer.py

chore: final cleanup, update README and fix gitignore

feat: persist submissions in huggingface s3 storage buckets

fix(evaluation): collect all validation errors and generate valid baseline

feat: complete evaluation leaderboard and graph visualization

feat(evaluation): add core LMMF validator for flow problem

Duplicate from gradio-templates/leaderboard