chore(audio-rooms): post-moq-lite cleanup + KDoc + plan refresh

Tidy items now that the moq-lite swap is complete on both sides:

  - Drop the no-op `supportedMoqVersions: List<Long>` parameter from
    `connectNestsListener` / `connectNestsSpeaker`. moq-lite negotiates
    via ALPN, no caller passed a value, and the project rule forbids
    no-op back-compat shims.
  - `NostrNestsRoundTripInteropTest` KDoc + comments now describe the
    moq-lite framing path (one Subscribe bidi for `audio/data`, group
    uni streams with `DataType=0` + GroupHeader + size-prefixed frames)
    instead of the stale IETF "OBJECT_DATAGRAMs / SETUP" framing.
  - `DefaultNestsListener` / `DefaultNestsSpeaker` KDoc now flags them
    as IETF MoQ-transport reference impls — production uses
    `MoqLiteNests*`. They stay around for the IETF unit-test suite.
  - `audio-rooms-completion.md` Phase M5 / M6 / M7 marked **DONE** —
    the plan was written before the moq-lite gap was discovered, so
    it described the work as IETF-MoQ-publisher additions; the
    moq-lite path lands the same outcome via a different protocol.

nestsClient/src/commonMain/kotlin/com/vitorpamplona/nestsclient/NestsConnect.kt

@@ -22,7 +22,6 @@ package com.vitorpamplona.nestsclient
 
 import com.vitorpamplona.nestsclient.audio.AudioCapture
 import com.vitorpamplona.nestsclient.audio.OpusEncoder
-import com.vitorpamplona.nestsclient.moq.MoqVersion
 import com.vitorpamplona.nestsclient.moq.SubscribeHandle
 import com.vitorpamplona.nestsclient.transport.WebTransportException
 import com.vitorpamplona.nestsclient.transport.WebTransportFactory
@@ -55,10 +54,6 @@ import kotlinx.coroutines.flow.MutableStateFlow
  * @param signer NIP-98 signer for the mintToken HTTP call.
  * @param scope where the moq-lite pumps live (typically the caller's
  *   ViewModel scope so they cancel when the screen leaves).
- * @param supportedMoqVersions retained for source-compatible callers but
- *   currently a no-op — moq-lite negotiates via ALPN, not an in-band
- *   SETUP message. Will be repurposed to drive ALPN preference once a
- *   second moq-lite version ships.
  */
 suspend fun connectNestsListener(
     httpClient: NestsClient,
@@ -66,7 +61,6 @@ suspend fun connectNestsListener(
     scope: CoroutineScope,
     room: NestsRoomConfig,
     signer: NostrSigner,
-    supportedMoqVersions: List<Long> = listOf(MoqVersion.DRAFT_17),
 ): NestsListener {
     val state =
         MutableStateFlow<NestsListenerState>(
@@ -112,10 +106,8 @@ suspend fun connectNestsListener(
     state.value = NestsListenerState.Connecting(NestsListenerState.Connecting.ConnectStep.MoqHandshake)
 
     // moq-lite Lite-03 has NO setup message — the WebTransport handshake
-    // itself is the handshake, version is selected by ALPN. The
-    // `supportedMoqVersions` parameter is retained for backward compat
-    // with callers that may want to gate on a version mismatch in
-    // future, but it is currently a no-op.
+    // itself is the handshake, version is selected by the ALPN
+    // `moq-lite-03`.
     val moq =
         try {
             com.vitorpamplona.nestsclient.moq.lite.MoqLiteSession
@@ -185,7 +177,6 @@ suspend fun connectNestsSpeaker(
     speakerPubkeyHex: String,
     captureFactory: () -> AudioCapture,
     encoderFactory: () -> OpusEncoder,
-    supportedMoqVersions: List<Long> = listOf(MoqVersion.DRAFT_17),
 ): NestsSpeaker {
     val state =
         MutableStateFlow<NestsSpeakerState>(
@@ -231,8 +222,7 @@ suspend fun connectNestsSpeaker(
     state.value = NestsSpeakerState.Connecting(NestsSpeakerState.Connecting.ConnectStep.MoqHandshake)
 
     // moq-lite Lite-03 has NO setup message. Same logic as the listener
-    // path — `supportedMoqVersions` retained for backward compat but
-    // currently a no-op because version is selected by ALPN.
+    // path — version is selected by the `moq-lite-03` ALPN.
     val moq =
         try {
             com.vitorpamplona.nestsclient.moq.lite.MoqLiteSession

nestsClient/src/commonMain/kotlin/com/vitorpamplona/nestsclient/NestsListener.kt

@@ -99,12 +99,16 @@ sealed class NestsListenerState {
 }
 
 /**
- * Default [NestsListener] implementation that delegates to a [MoqSession]
- * already set up on a [com.vitorpamplona.nestsclient.transport.WebTransportSession].
+ * IETF `draft-ietf-moq-transport-17` [NestsListener] reference
+ * implementation. **Not used in production** — the production listener
+ * path uses [MoqLiteNestsListener] over moq-lite Lite-03 (see
+ * `nestsClient/plans/2026-04-26-moq-lite-gap.md`). Kept for the IETF
+ * unit-test suite (`MoqSession`, `MoqCodec`) and for any future IETF
+ * MoQ-transport target.
  *
- * Construction does NOT open the transport — call [connectNestsListener] to
- * walk the full HTTP + transport + MoQ handshake; this class just owns the
- * resulting session and exposes the listener API on top.
+ * Delegates to a [MoqSession] already set up on a
+ * [com.vitorpamplona.nestsclient.transport.WebTransportSession];
+ * construction does NOT open the transport.
  */
 class DefaultNestsListener internal constructor(
     private val session: MoqSession,

nestsClient/src/commonMain/kotlin/com/vitorpamplona/nestsclient/NestsSpeaker.kt

@@ -115,11 +115,16 @@ sealed class NestsSpeakerState {
 }
 
 /**
- * Default [NestsSpeaker] that wraps a connected [MoqSession] and plumbs an
- * [AudioRoomBroadcaster] through it on [startBroadcasting].
+ * IETF `draft-ietf-moq-transport-17` [NestsSpeaker] reference
+ * implementation. **Not used in production** — the production speaker
+ * path uses [MoqLiteNestsSpeaker] over moq-lite Lite-03 (see
+ * `nestsClient/plans/2026-04-26-moq-lite-gap.md`). Kept for the IETF
+ * unit-test suite (`NestsSpeakerTest`) and for any future IETF
+ * MoQ-transport target.
  *
- * Construction does NOT open the transport — call [connectNestsSpeaker] to
- * walk the full HTTP + transport + MoQ handshake.
+ * Wraps a connected [MoqSession] and plumbs an [AudioRoomBroadcaster]
+ * through it on [startBroadcasting]. Construction does NOT open the
+ * transport.
  */
 class DefaultNestsSpeaker internal constructor(
     private val session: MoqSession,