feat: New Web OS design (#12)

* new web os frontend

* add docs

* Add CNAME and restore NIP-05 nostr.json for GitHub Pages

The Pages custom domain (layer.systems) is only stored in repo settings;
a CNAME file in the build output makes it survive Pages reconfiguration.
Restore public/.well-known/nostr.json, which this branch had dropped —
removing it would break the existing NIP-05 identifiers on layer.systems.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014YtQoCzkP7Bo8nruhxojPi

* Ignore eslint and tsc build caches

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014YtQoCzkP7Bo8nruhxojPi

* Rebrand page title and metadata to LAYER.systems

The site ships on layer.systems, so the document title, meta and OG
description, and the web manifest now carry that name instead of
"Nostr OS". OsShell sets the title at runtime, so it is updated too —
otherwise the tab would fall back to the old branding after hydration.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014YtQoCzkP7Bo8nruhxojPi

* Rename remaining visible "Nostr OS" strings to LAYER.systems

Covers the About window heading, the mobile shell header and the app
icon's aria-label, so the visible branding matches the page title.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014YtQoCzkP7Bo8nruhxojPi

---------

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

opencode.json

@@ -0,0 +1,9 @@
+{
+  "$schema": "https://opencode.ai/config.json",
+  "mcp": {
+    "nostr": {
+      "type": "local",
+      "command": ["npx", "-y", "@nostrbook/mcp@latest"]
+    }
+  }
+}