ui: remove tab emojis, brighten unselected tab text

chore: prepare Build Small submission

fix: stronger text contrast, hide no-label labels, fix latex command regex

fix: all-English strings + higher contrast text/UI colors

ui: low-saturation blue-yellow theme, high contrast fonts, all English UI text

feat: add MiniCPM-V-4.6 OCR, history sidebar, VSCode dark editor UI

fix: Gradio 6 compatibility - move css to launch, remove elem_classes from Examples

ui: add preview panel styling and empty state

ui: redesign to VSCode dark tech theme with editor/preview layout

chore: switch default model to MiniCPM5-1B and update README for STEM user

feat: Gradio Space with NL->LaTeX, validation, auto-fix and render