Real hardware has no USB and can't resolve 10.0.2.2, so we pair over
ADB-WiFi and point the app at the dev laptop's LAN URL. run.sh gains a
`watch`/`emulator` target prefix so both devices can be attached in
parallel without serial-picking roulette.
- network_security_config.xml: whitelist 192.168.178.27 for cleartext
- build.gradle.kts: resolveProp() threads Gradle CLI `-P` overrides
into BuildConfig (SERVER_URL, API_KEY) ahead of local.properties
- run.sh: adb_cmd wrapper honours ADB_SERIAL; new `devices` and
`connect [ip:port]` subcommands; `.watch_serial` caches the paired
endpoint so `./run.sh watch install` just works on subsequent runs
- .gitignore: ignore `.watch_serial`
Brummel
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