feat(core): every connect introduces the device by name

The wire always had Hello.name and the host always honored it - but the
connect path hardcoded None (only the PIN-pairing ceremony sent a name),
so every no-PIN "request access" knock surfaced as the fingerprint
placeholder "device abcd1234", and approving one without retyping a
name persisted that placeholder into the trust store forever.

NativeClient::connect now takes the device name. The session workers
and the probe connects pass trust::device_name() (the hostname), the C
ABI defaults to the same without a signature change (an ex10 variant
can make it explicit if an embedder wants a custom label), and Android
threads Build.MODEL through nativeConnect - the same convention its
pairing dialogs already use for nativePair.

The host, in turn, resolves the streaming client's display name (trust
store first, so an approval-time rename wins; else the sanitized Hello
name) and exposes it as client_name in GET /api/v1/local/summary for
the tray's connect toast - a deliberate, documented loosening of that
route's "no device names" contract, in the local user's favor: it tells
them who is on their machine. A paired-but-idle device's name still
never appears, which the mgmt tests now pin explicitly. openapi.json,
its docs-site copy, and the SDK bindings regenerate.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

clients/android/app/src/main/kotlin/io/unom/punktfunk/HostConnect.kt

@@ -1,6 +1,7 @@
 package io.unom.punktfunk
 
 import android.content.Context
+import android.os.Build
 import io.unom.punktfunk.kit.Gamepad
 import io.unom.punktfunk.kit.NativeBridge
 import io.unom.punktfunk.kit.VideoDecoders
@@ -53,6 +54,9 @@ suspend fun connectToHost(
             // the user's soft codec preference — the host resolves the emitted codec from both.
             VideoDecoders.decodableCodecBits(), settings.preferredCodec(), timeoutMs,
             launch,
+            // The host's approval-list / trust-store label for this device — the same
+            // Build.MODEL convention the pairing dialogs use for nativePair.
+            Build.MODEL ?: "Android",
         )
     }
 }