The APK build failed compiling the plugin: Capacitor's `activity` is an
AppCompatActivity, so the module needs appcompat. Now `npm run android:build`
succeeds, wires skatespots-nfc in, and merges the NFC permission. Still needs a
device test for the actual write.
Web NFC isn't exposed in Capacitor's WebView, so the APK needs a native writer.
Adds packages/skatespots-nfc — a local Capacitor Android plugin (Kotlin,
enableReaderMode + NDEF URL record), registered BY NAME (not bundled). lib/nfc.ts
now uses the plugin on native and Web NFC on the web. iOS can't write tags.
⚠️ UNVERIFIED (needs cap sync + a device). README documents it.
