Social content calendar for a creator

Build a content calendar for a solo creator or small marketing team.

Core features:
1. Month/week views of scheduled posts across platforms
2. Compose: caption, media, per-platform tweak, schedule
3. Kanban lanes: idea / drafting / ready / posted
4. Post to X / LinkedIn / Instagram via their APIs (or export)
5. Analytics import: which posts performed

Data: posts, versions, media, analytics.
Must-haves: draft autosave, image cropping per platform.