Root cause: loadManuallyCreatedProjects() was restoring projects with
stale session arrays from localStorage. When loadProjects() tried to
merge with fresh API data, the stale sessions would override.
Fix 1: In loadManuallyCreatedProjects(), reset the sessions array to
empty for each loaded project. This ensures sessions always come from
the API (authoritative source) rather than localStorage.
Fix 2: In createSessionInFolder(), remove the redundant initialize()
call after loadProjects(). initialize() would reload stale localStorage
data, undoing the fresh data fetched by loadProjects().
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
