fix: diversify CTA copy, bump generation variety, add hook pruning

feat: onboarding fix, slideshow creation modes, TikTok multi-account

fix: remove video.list scope + add analytics banner

feat: add video.list scope for TikTok stats (requires Display API product)

fix: remove non-existent photo scopes from TikTok OAuth

restore: add photo scopes back (to be enabled in TikTok Dev Portal)

fix: remove unapproved photo scopes from TikTok OAuth

revert: remove video.list scope — not approved on TikTok app

fix: add video.list scope + fix MEDIA_UPLOAD publish_id polling

fix: extract tiktok_video_id from inbox publish_id for stats

fix: resolve analytics page 400/500 errors

feat: add TikTok analytics dashboard page + nav item

feat: add summary endpoint + fix tiktok_video_id for PHOTO posts

fix: pre-validate image pool with parallel HEAD checks to exclude broken R2 URLs

fix: exclude known-failed URLs from image replacement pool