Weekly content planning: fill next week's slots

Recurs every Monday, because a content calendar goes empty quietly rather than all at once.

Thirty minutes, in this order:

1. Open the Scheduled Calendar and look at next week. Every published slot should already have a post attached to it.
2. Any slot still empty gets a post created now, with a channel tag and a due date, even if the idea is rough.
3. Any post whose caption is not written by Wednesday will not make next week. Move it rather than pretending.
4. Check Waiting on approval. Anything more than two days old gets chased today.