Add guest try-without-account flow for MuscleGrowthAI.

Merge FEAT_MuscleGrowthAI (login removal, HF main) into FEAT_PersistentAuth

Fix persistent auth so users stay logged in across refreshes and redeploys.

Merge hf/main before HF deploy (login button removal)

remove non-working Google and phone login buttons

Complete Cybersecurity -> MuscleGrowthAI theme swap and fix Profile

Adopt FEAT cybersecurity branding, CSS, Canvas/Chat/Sidebar UI, HF Spaces deploy infra, SQLite shim wiring, last-week's advisor cap + thinking-indicator fixes

Add configuration support (#3)

update environment variables

add auth

add signup page