* feat(achievements): share card render on unlocked badges
Adds a Share button to each unlocked achievement card that opens a
modal and renders a 1200x630 PNG share card client-side via Canvas2D
(no backend, no network, no new deps). Two actions: Download PNG and
Copy image to clipboard.
Card layout mirrors the in-dashboard visual language: tier-colored
glow, icon from the existing LUCIDE sprite set, achievement name,
tier badge pill, description, progress stat line, and a Hermes Agent
watermark. Sized for X/Twitter, Discord, LinkedIn, Bluesky link
previews.
Vendored on top of the upstream @PCinkusz bundle; the 'in-progress
scan banner' precedent already established this divergence pattern.
Manifest bumped 0.3.1 -> 0.4.0.
* feat(achievements): share-on-X as primary action on share dialog
Adds a 'Share on X' button as the primary action in the share dialog.
Opens https://x.com/intent/post with a pre-filled tweet referencing
the achievement name, tier, @NousResearch, and the Hermes docs URL.
Copy image and Download PNG become secondary actions: users who want
the badge attached can Copy image, paste into the X composer, post.
Primary button styled as X's signature black-on-white fill so the
action is unambiguous.
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