Fix proposal date shown to published_at

[agustibr]

🎩 What? Why?

Creation date is shown for Proposal in: card, detail, admin component index and when exported.
But the relevant date is the Publication date, this PR solves this issues

📌 Related Issues

• Fixes Data error when creating propossal #3646

📋 Subtasks

• Add CHANGELOG entry
• Added test for proposal_m_cell_spec.rb
• Updated test for proposals_spec.rb
• modified form created_at to published_at:
  • proposal card_m
  • proposal author card
  • proposal admin index
  • proposal serializer (export)

📷 Screenshots (optional)

[mrcasals]

Wow, I was not aware we were using it in so many places, good job @agustibr! 😄

[agustibr]

Jaja, I also discovered all cases on the progress 😅

❓ @mrcasals there's one more case, it's the currently failing test, because of the proposal preview step in the wizard, at that point there's no published_at, before it rendered the created_at value, what should it show?

1. no creation_date_status box 🗑️
2. a blank space ⬜
3. the created_at value
4. or another option

[mrcasals]

@agustibr I'd remove the cell (option 1). Maybe it even makes sense to remove the whole status section, since draft proposals can't be endorsed nor commented, so that data makes no sense.

What do you think? 😄

[agustibr]

@mrcasals yes I think so, but it is supossed to be a preview of the final card_m.

@decidim/product what do you think is the best option here?

[xabier]

hi, I don't have strong opinion. Simplest option 1 seems ok.

[agustibr]

@xabier thanks for your response, ok I'll remove the creation_date_status box from the preview

[agustibr]

@mrcasals, PR ready to merge! 😬

[agustibr]

👏