Substr Update - Shared Nostr Events, Community Space Cards, Live Stream Polish

Quick build update from Substr. I’ve shipped a lot of product polish recently, but two bigger areas deserve a deeper explanation: Shared Nostr Events and community-level customization.

Shared Nostr Event posts
Substr is community-scoped by design. I intentionally do not load the full global Nostr firehose into every /s/.
That keeps communities focused, but it also creates a practical issue: people often want to bring an existing Nostr post into a community thread.

So I added Share Nostr Event posting.

What this does:

• You can post a Nostr event reference directly into a substr.
• The shared card resolves richer content (mentions, links, media, video) instead of just showing raw IDs/URLs.
• Engagement actions (likes, zaps, replies) are wired toward the original event target, so interaction stays meaningful across clients.
• I improved repost compatibility so shared behavior is clearer outside Substr too.

Why I did it this way:

• In a global client, “repost” can assume broad feed context.
• In a community-scoped client, I need a wrapper that anchors the post inside a specific space while still respecting the original event.
• This is my bridge between “community context” and “cross-client interoperability.”

**Community space cards (making each /s/ more ownable)
**
I also expanded moderator controls for the right-side “space” layer with dedicated cards:

• Message card (editable title/body)
• Social links card (compact icon-first links)
• Useful links card (curated title + URL entries)

This gives each community a stronger identity without turning setup into a heavy CMS flow.

I’m exploring how to make communities even more distinct and self-owned:

• stronger space identity patterns,
• clearer utility cards,
• better “what this community is for” signaling,
• and more creator/show/community-specific layouts over time.

Other smaller fixes

• Relay UX refinement: compact cards, status dots, clearer relay info.
• Signer/login flow cleanup with better QR/copy/manual paths.
• Mobile-first signer onboarding improvements (wizard flow, clearer steps).
• /s/ sharing improved for PWA (native share first, copy fallback).
• Atmospheric background behavior fixed (viewport-anchored, no stretch on long pages).
• Rich-text mention parsing improved (nostr:nprofile... support, including leading emoji cases).
• Clickable identity and /s/... badges expanded across more surfaces.
• Stream + chat improvements: better layout, publishing/read behavior, diagnostics, and interaction polish.

Cheers and on to the next one!