The web/PWA Amber path set compressionType=none; the native intents set neither
compressionType nor returnType, and the JS gzip decoder was never called. NIP-55
lets Amber gzip a large result (Signer1... base64), so a long nip44_decrypt (a
long DM) could arrive compressed and be parsed as garbage. Native intents now
send compressionType=none; the JS signer also gunzips any Signer1 result. Timeout
message no longer wrongly says Amber may not be installed.
Root cause: the stock nostr-signer-capacitor-plugin (0.0.5) tries Amber's
background ContentProvider first, which GrapheneOS blocks and never returns,
with no clean fallback — so signing hung 90s and Amber never appeared.
Fix (matches Amethyst, the reference NIP-55 client):
- New native Capacitor plugin AmberIntent (android-templates/AmberIntentPlugin.java)
that goes STRAIGHT to a foreground nostrsigner: intent via a properly-registered
ActivityResultLauncher, tracks each request by id, and times out gracefully.
- MainActivity now registers the launcher in onCreate (AndroidX contract) and
hands it to the plugin, while staying a safe stock BridgeActivity (no
WebViewClient override → no black screen).
- inject-main-activity.mjs now installs both MainActivity.java and AmberIntentPlugin.java.
- capacitorAmberSigner.ts rewired to registerPlugin('AmberIntent'); every op is a
user-visible Amber Approve/Reject popup; rejections surface as a friendly message.
- Removed the dead npm nostr-signer-capacitor-plugin dependency (and its phantom
coracle fork spec) plus its vite external entry — signing no longer uses it.
- Delete flow copy updated to the new foreground UX (Approve in Amber / Cancelled
on reject) instead of the diagnostic SIGN/PUBLISH narration.
Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>
