docs: add local startup instructions and initialize uv project

fix: pre-compute KDE server-side with scipy to fix blank after density chart

feat: replace histogram with double density plot for cluster visualization

refactor: move Jenks/KMeans section before pricing analysis

refactor: replace free/paid with non authentifié/authentifié throughout

feat: replace number_input with slider for ad revenue (0.1-1 XPF)

feat: add optimal threshold chart (Jenks + KMeans convergence at 99 chars)

feat: add freemium pricing simulator with ad revenue projection

fix: remove unsupported category_orders from px.sunburst

feat: add sunburst chart day-of-week / hour distribution

feat: add daily SMS volume chart for service sizing

Initial release — Mobitag Explorer Streamlit Space

initial commit