Guard useTheme effect to skip when settings are undefined, preventing
it from overwriting the inline script's cached color with cyan defaults.
Move CSS accent var defaults from index.css :root into the index.html
inline script so they are always set synchronously before paint.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Critical: Lock state was purely React useState — refreshing the page reset it.
Now persisted server-side via is_locked/locked_at columns on user_sessions.
POST /auth/lock sets the flag, /auth/verify-password clears it, and
GET /auth/status returns is_locked so the frontend initializes correctly.
UI: Cache accent color in localStorage and apply via inline script in
index.html before React hydrates to eliminate the cyan flash on load.
UI: Increase TanStack Query gcTime from 5min to 30min so page data
survives component unmount/remount across tab switches without skeleton.
UI: Move Projects nav onClick from the icon element to the full-width
container div so the entire row is clickable when the sidebar is collapsed.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
