Preserve onboard preview recordings across backpressure and share the complete spatial scene

2026-09-07 17:47:10 +03:00
parent 9b6534287a
commit 9bba44f7c4
30 changed files with 957 additions and 494 deletions
@@ -1,3 +1,4 @@
+import {SpatialScene, EmptySpatialStage} from '../../../../packages/spatial-ui/src';
 import {SpatialToolbarActions} from "../../../../packages/spatial-ui/src/SpatialToolbarActions";
 import { VehiclesWorkspace } from "./fleet/VehiclesWorkspace";
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
@@ -33,7 +34,6 @@ import {
  type WorkspaceDefinition,
 } from "../productModel";
 import { finiteMetric, formatNumber, pipelineLatency, sourceModeLabel } from "../presentation";
-import type { SceneSettings } from "../sceneSettings";
 import type { WorkspaceRendererProps } from "./contracts";
 import { DatasetGatewayWorkspace } from "./DatasetGatewayWorkspace";
 import { ArtifactHealthWorkspace } from "./data/ArtifactHealthWorkspace";
@@ -91,26 +91,6 @@ function WorkspaceLead({ definition, note }: { definition: WorkspaceDefinition;
    </section>
  );
 }
-function EmptySpatialStage({ settings }: { settings: SceneSettings }) {
-  return (
-    <div className="empty-spatial-stage" data-grid={settings.showGrid ? "true" : undefined}>
-      <div className="empty-spatial-stage__grid" aria-hidden="true" />
-      <div className="spatial-axis" aria-hidden="true">
-        <span data-axis="x">X</span>
-        <span data-axis="z">Z</span>
-      </div>
-      <div className="empty-spatial-stage__message">
-        <span className="empty-spatial-stage__icon"><Icon name="globe" size={20} /></span>
-        <strong>Визуальный источник не назначен</strong>
-        <p>
-          Область сцены не подставляет демонстрационные точки. Назначьте RRD или Rerun gRPC, чтобы
-          открыть реальные данные.
-        </p>
-      </div>
-    </div>
-  );
-}
-
 function SpatialWorkspace({
  state,
  sourceUrl,
@@ -412,14 +392,9 @@ function SpatialWorkspace({
          : null,
      });

-  return (
-    <div
-      className="spatial-workspace"
-      data-focused={pointCloudFocused || floatingSourceMaximized ? "true" : undefined}
-    >
-      <div className="spatial-toolbar" data-viewer-controls="v1">
-        <div className="spatial-toolbar__actions">
-          {recordedPerceptionSupported || livePerceptionAvailable ? (
+  return <SpatialScene viewportRef={viewportRef} focused={pointCloudFocused||floatingSourceMaximized}
+    primaryFocused={pointCloudFocused} mediaMaximized={floatingSourceMaximized}
+    toolbar={<>          {recordedPerceptionSupported || livePerceptionAvailable ? (
            <div className="spatial-toolbar__view-switch" role="group" aria-label="Слои распознавания сцены">
              <Button
                size="compact"
@@ -499,17 +474,7 @@ function SpatialWorkspace({
              Сброс вида
            </Button>
          ) : null}
-          <SpatialToolbarActions openSource={navigation.openSource} openLayers={navigation.openLayers} openDisplay={navigation.openDisplay}/>
-        </div>
-      </div>
-
-      <div
-        ref={viewportRef}
-        className="spatial-viewport-shell"
-        data-primary-focused={pointCloudFocused ? "true" : undefined}
-        data-media-maximized={floatingSourceMaximized ? "true" : undefined}
-      >
-          {sourceUrl.trim() && pointCloudVisible && !intentionalSourceEnd ? (
+          <SpatialToolbarActions openSource={navigation.openSource} openLayers={navigation.openLayers} openDisplay={navigation.openDisplay}/></>} renderer={<>          {sourceUrl.trim() && pointCloudVisible && !intentionalSourceEnd ? (
            <RerunViewport
              profile={rerunViewerProfile}
              sceneSettings={sceneSettings}
@@ -523,20 +488,15 @@ function SpatialWorkspace({
          ) : (
            <EmptySpatialStage settings={sceneSettings} />
          )}
-
-          {spatialControls && !recordedSource ? (
-            <div className="scene-device-controls">
-              <spatialControls.View
+</>}
+    deviceControls={spatialControls&&!recordedSource?(              <spatialControls.View
                model={spatialControls.model}
                host={{
                  openSpatialScene: () => navigation.openView("spatial-scene"),
                  activateAutomaticSpatialSource: navigation.activateAutomaticSpatialSource,
                }}
-              />
-            </div>
-          ) : null}
-
-          {pointCloudFocused ? (
+              />):null}
+    sourceControls={<>          {pointCloudFocused ? (
            <button
              type="button"
              className="scene-focus-exit"
@@ -567,22 +527,9 @@ function SpatialWorkspace({
              ) : null}
            </div>
          ) : null}
-
-          <div
-            className="scene-status scene-status--top-left"
-            aria-hidden={pointCloudFocused || floatingSourceMaximized}
-          >
-            <span className="section-eyebrow">ВИЗУАЛЬНЫЙ ДВИЖОК</span>
-            <StatusBadge tone={viewerStatusTone}>{viewerStatusLabel}</StatusBadge>
-            {!intentionalSourceEnd && viewerMessage ? <small>{viewerMessage}</small> : null}
-          </div>
-
-          <div
-            className="scene-metrics"
-            aria-label="Метрики пространственной сцены"
-            aria-hidden={pointCloudFocused || floatingSourceMaximized}
-          >
-            <div>
+</>}
+    status={{label:viewerStatusLabel,tone:viewerStatusTone,message:!intentionalSourceEnd?viewerMessage:undefined}}
+    metrics={<>            <div>
              <span>КАДР/С</span>
              <strong>{formatNumber(frameRate)}</strong>
            </div>
@@ -603,10 +550,7 @@ function SpatialWorkspace({
                  {aiFrameRate === null ? null : <small> · {formatNumber(aiFrameRate)} Гц</small>}
                </strong>
              </div>
-            ) : null}
-          </div>
-
-          {!pointCloudFocused && !floatingSourceMaximized && state?.sourceMode && state.sourceMode !== "idle" && !sourceUrl.trim() ? (
+            ) : null}</>} overlays={<>          {!pointCloudFocused && !floatingSourceMaximized && state?.sourceMode && state.sourceMode !== "idle" && !sourceUrl.trim() ? (
            <div className="scene-adapter-note">
              <Icon name="alert" />
              <span>
@@ -661,14 +605,8 @@ function SpatialWorkspace({
            </div>
          ) : null}

-          {presentedViewerStatus === "ready" && !floatingSourceMaximized ? (
-            <div className="scene-navigation-hint" aria-label="Навигация по 3D-сцене">
-              <span>Колесо · зум к курсору</span>
-              <span>WASD · свободный проход</span>
-            </div>
-          ) : null}
-
-          {!pointCloudFocused && !floatingSourceMaximized && recordedPlaybackReady ? (
+</>}
+    navigationReady={presentedViewerStatus==='ready'} timeline={<>          {!pointCloudFocused && !floatingSourceMaximized && recordedPlaybackReady ? (
            <ObservationTimeline
              active={presentedViewerStatus === "ready"}
              sourceCount={Math.max(1, (unifiedPerception ? 2 : 1) + presentedMediaSourceCount)}
@@ -691,8 +629,8 @@ function SpatialWorkspace({
              className="scene-timeline"
            />
          ) : null}
-
-          {visibleMediaSources.map((source, index) => (
+</>}
+    media={<>          {visibleMediaSources.map((source, index) => (
            <FloatingObservationWindow
              key={source.id}
              source={source}
@@ -743,10 +681,7 @@ function SpatialWorkspace({
                />
              ))}
            </div>
-          ) : null}
-      </div>
-
-      <div className="spatial-contract-strip">
+          ) : null}</>} footer={      <div className="spatial-contract-strip">
        <span><i data-state="ready" />Облако точек</span>
        <span><i data-state="ready" />Траектория</span>
        <span><i data-state="ready" />Преобразования</span>
@@ -755,9 +690,7 @@ function SpatialWorkspace({
        <span><i data-state={segmentationActive ? "ready" : "contract"} />Сегментация</span>
        <span><i data-state={cuboids3dActive ? "ready" : "contract"} />Кубы 3D</span>
        <span><i data-state="contract" />Компоновка</span>
-      </div>
-    </div>
-  );
+      </div>}/>;
 }

 function CameraSourceCard({
@@ -191,11 +191,13 @@ test("XGRIDS frontend is physically plugin-owned and split by operator pipeline"
  assert.match(spatialControls, /role="alert"/);
  assert.doesNotMatch(spatialControls, /Повторить остановку/);
  assert.match(spatialControls, /stopLocalReceiver/);
-  assert.match(spatialControls, /<ActivityIndicator size="compact"/);
-  assert.match(spatialControls, /aria-busy=\{phase\.busy\}/);
-  assert.match(spatialControls, /K1 калибруется и готовит облако точек/);
-  assert.match(spatialControls, /Первые данные могут появиться через десятки секунд/);
-  assert.match(spatialControls, /Не перемещайте устройство/);
+  assert.match(spatialControls, /<K1SpatialSession/);
+  const spatialSession = readFileSync(join(pluginFrontendRoot, "components/K1SpatialSession.tsx"), "utf8");
+  assert.match(spatialSession, /<ActivityIndicator size="compact"/);
+  assert.match(spatialSession, /aria-busy=\{phase\.busy\}/);
+  assert.match(spatialSession, /K1 калибруется и готовит облако точек/);
+  assert.match(spatialSession, /Первые данные могут появиться через десятки секунд/);
+  assert.match(spatialSession, /Не перемещайте устройство/);

  const styles = readFileSync(join(pluginFrontendRoot, "styles.css"), "utf8");
  assert.doesNotMatch(styles, /@keyframes xgrids-k1-spin/);
@@ -37,7 +37,7 @@ test('active acquisition exposes STOP and Rerun without another START',()=>{
 assert.match(markup,/Остановить устройство/);
 assert.match(markup,/rerun-viewport__canvas/);
 assert.match(markup,/>Статус</);
- assert.match(markup,/>Пространственная модель</);
+ assert.match(markup,/>Пространственная сцена</);
 for(const label of ['Движок','Слои','Отображение','Камера K1','Окно накопления облака точек'])assert.ok(markup.includes(label));
 assert.ok(markup.includes('data-presented="false"'));
 assert.ok(!markup.includes('Loading Rerun'));
@@ -53,8 +53,8 @@ test('calibration loader stays inside the primary action',()=>{
 const starting={...device,control:{...device.control,can_start:false},snapshot:{...device.snapshot,acquisition:'starting'}};
 const markup=render(starting);
 assert.match(markup,/<button[^>]*aria-busy="true"[\s\S]*?nodedc-activity-indicator[\s\S]*?Запускаем устройство<\/button>/);
- assert.equal((markup.match(/nodedc-activity-indicator"/g)||[]).length,1);
- assert.doesNotMatch(markup,/Остановить устройство|k1-preview-spatial/);
+ assert.match(markup,/K1 калибруется и готовит облако точек/);
+ assert.doesNotMatch(markup,/Обновить просмотр/);
 });
 test('completed STOP remains visible while the control connection is checked again',()=>{
 const stopped={...device,online:false,verified:false,control:{...device.control,phase:'completed',can_start:false,network_applied:true}};
@@ -78,3 +78,16 @@ test('onboard camera admits immediate sourceopen and ignores callbacks after clo
  assert.equal(ready,1);assert.equal(failed,0);
 }finally{globalThis.MediaSource=saved.media;URL.createObjectURL=saved.create;URL.revokeObjectURL=saved.revoke;}
 });
+
+test('a recovered media peer resumes a recording without reinserting old RRD batches',async()=>{
+ const {previewRecording}=await server.ssrLoadModule('@xgrids-k1/frontend/sensors/previewFrames.ts');
+ const sent=[];const cursor=previewRecording(value=>sent.push(value));
+ const payload=new Uint8Array(12);payload.set([82,82,70,50]);
+ assert.equal(cursor.accept(1,payload),true);
+ // The ACK was lost, so the new peer resends the exact complete batch.
+ assert.equal(cursor.accept(1,payload),false);
+ assert.equal(cursor.after,1);
+ assert.throws(()=>cursor.accept(3,payload),/cursor gap/);
+ assert.equal(cursor.accept(2,payload),true);
+ assert.equal(sent.length,2);
+});
@@ -11,7 +11,7 @@ import sys


 ROOT = Path(__file__).resolve().parents[1]
-VERSION = "0.8.9"
+VERSION = "0.8.10"
 sys.path.insert(0, str(ROOT.parents[1] / "scripts/packaging"))
 from debian import package

@@ -117,3 +117,12 @@ is preserved by package removal/upgrade; public R12 preparation leaves it in
 place and the service consumes the same systemd credential. Thus this artifact
 is an update for the existing R11 board, not a self-contained credential-bearing
 installer for a new board. The older private release is not altered.
+
+## Installed outcome and failed stability acceptance
+
+The owner subsequently reported installer exit 0. Read-only dpkg inspection
+confirmed Node 0.8.9 and K1 0.1.9, with active service and zero service restarts.
+Camera and cloud appeared, but repeated outbox Full / media backpressure caused
+preview recording replacement and history loss. R12 is not accepted as stable.
+The follow-up investigation and correction are recorded in
+`2026-09-07-k1-onboard-preview-continuity-r13.md`.
@@ -0,0 +1,93 @@
+# K1 onboard preview continuity and canonical scene R13
+
+## Observed regression
+
+The owner confirmed R12 installation exit 0. Read-only package inspection
+confirmed Node 0.8.9 and K1 0.1.9. The service was active with NRestarts=0.
+Camera, points and trajectory appeared, but the live scene repeatedly went black
+and accumulation/route restarted. A bounded journal selection for that exact run
+showed repeated `Node RRD subscriber failed exception=Full`, plus media delivery
+RuntimeErrors. This is failed preview acceptance, not an accepted R12 release.
+
+The encoded outbox previously raised Full after 500 ms. SCTP delivery also
+terminated a peer after two seconds of backpressure. Every replacement peer
+constructed a new RerunBridge, called begin_session and discarded trajectory and
+recording identity. Separately, the UI hid the entire scene whenever source age
+expired. No scanner/service restart is needed to explain these symptoms.
+
+## Continuity contract
+
+Preview protocol v3 keeps one native recording per acquisition view. The browser
+keeps its native channel and acknowledged batch cursor while disposable WebRTC
+peers recover. The board retains the corresponding subscriber for up to five
+minutes after disconnection. Every complete RRD batch is numbered and ACKed;
+a lost ACK causes retransmission of identical bytes, and the browser deduplicates
+it. Cursor mismatch/expired resumption reports a terminal reopen instruction;
+it must never silently create replacement history. Explicit view close frees
+capacity immediately; acquisition close retires every view.
+
+The encoded outbox is bounded to two queued batches, one pending batch and one
+encoder-held batch, each no larger than 8 MiB. It waits without killing the
+recording. Decoded input coalesces independently per modality. The acquisition
+producer/archive never waits for the preview. Route snapshots come from the
+already bounded acquisition-owned trajectory, including motion during preview
+congestion. This is a disposable live view, not a replay of every archived frame.
+The chosen accumulation window still governs how long points remain visible.
+
+Data-channel buffering is bounded at 256 KiB. Backpressure pauses sending while
+the peer is alive; a 30-second keepalive expiry bounds abandoned peers. Preview
+close/recovery does not send START, STOP, Wi-Fi, BLE or camera-producer commands.
+Camera lease renewal requires an existing active recording and restarts only
+the browser decoder. Source age includes time spent receiving each RRD payload;
+repeated metadata cannot make old points fresh. Stale history remains visibly
+marked instead of being replaced with a black canvas.
+
+## Exact scene composition
+
+The owner supplied the direct LAB scene as the composition reference. Shared
+`SpatialScene` now owns the existing toolbar, renderer allocation, device-control
+slot, source controls, engine status, metrics, navigation hint, timeline and media
+slots. Direct live and recorded hosts retain their existing renderers, profile
+factories, AI/replay controls and authority. Their markup is consumed through
+the shared scene instead of being independently re-created in the K1 Node UI.
+
+The original K1 phase/telemetry capsule is extracted as `K1SpatialSession`, with
+pure shared phase/metrics vocabulary. Direct and onboard views use the same
+calibration/completion copy, timing, route, speed and capsule geometry. The
+onboard adapter receives the actual acquisition phase; manual STOP uses the
+existing guarded operation. The scene stays mounted during calibration and STOP.
+
+The onboard scene uses the same ApplicationPanel header and floating camera
+window: title “Пространственная сцена”, live/wait status, expand and close. It
+omits LAB, descriptive subtitle, disk action and unused AI mode buttons. The
+three engine/layers/display tools, accumulation and movable/resizable camera
+remain. The enrollment “Настроить устройство” primary button occupies full width.
+No new Design Guideline primitive, navigation root, recorded blueprint, archive
+format, credential source or physical reconnection supervisor is introduced.
+
+## Validation
+
+- Full Control Station regression: 804/804 passed after shared composition/model
+  extraction. Focused UI checks are repeated after final media lifecycle changes.
+- Python: 92 relevant tests across native RRD (6), media (10), Node control (22),
+  installer (11) and camera gateway (43) covered by the combined pass and final
+  affected-subset pass. The final native/media/control subset passed 38/38.
+- Regressions include a blocked native outbox beyond 500 ms, ACK loss/resumption
+  of the same native subscriber, expired cursor rejection, explicit view disposal,
+  SCTP backpressure beyond two seconds, native RRD fragmentation, and idle/resume
+  of a real bounded loopback WebRTC peer with camera. No physical device commands.
+- Both UI typechecks and production/package builds are required before staging;
+  final artifacts and installation outcome are recorded below when available.
+
+The owner confirmed STOP; the paired Fleet snapshot was subsequently idle with
+control phase completed. Canonical Mission Core remains on port 8000. CUA exposes
+an in-app browser without documented cache/click controls, not the owner's
+Chrome session. Opening the home page is not clean-cache hardware acceptance.
+Required owner UI acceptance remains: clear Chrome cache before each run; START,
+calibration, camera/points, move the scanner, ensure route survives a delivery
+pause; move/resize camera; STOP and observe finalization. No Ops write or Git push
+is retried after the earlier automatic-approval rejections.
+
+R13 is a matched public update: Node 0.8.10 and K1 0.1.10, protocol v3. It uses the
+existing root-owned encrypted K1 credential. No Keychain read or secret-bearing
+installer is part of this build. The standard installer safe-state guard remains.
@@ -1,7 +1,7 @@
 export interface SensorProfile { id: string; sensor: number; stream: string; index: number; format: string; fps: number; width?: number; height?: number }
 export interface SensorOption { id: string; sensor: string; label: string; value: number; min: number; max: number; step: number; read_only: boolean }
 export interface Sensor {
- kind?:string; connection_label?:string; control?:{generation:number;revision:number;phase:string;can_start:boolean;can_stop?:boolean;can_verify?:boolean;network_applied?:boolean;reason_code?:string|null;acquisition_id:string|null};
+ kind?:string; connection_label?:string; control?:{generation:number;revision:number;phase:string;can_start:boolean;can_stop?:boolean;can_verify?:boolean;network_applied?:boolean;reason_code?:string|null;acquisition_id:string|null;acquisition_phase?:string};
 live_settings?: Record<string,unknown>;
 id: string; name: string; model: string; prepared: boolean; configured?: boolean; verified: boolean; online: boolean; usb: string; firmware?: string; playback_id?: string | null;
 snapshot: {context: {session_id: string; device: {device_id: string}; execution: {node_id: string}}; acquisition: string; enrollment: string; message?: string};
@@ -0,0 +1,8 @@
+import {Icon} from '@nodedc/ui-react';
+export function EmptySpatialStage({settings, title='Визуальный источник не назначен', detail='Область сцены не подставляет демонстрационные точки. Назначьте RRD или Rerun gRPC, чтобы открыть реальные данные.'}: {settings:{showGrid:boolean};title?:string;detail?:string}) {
+  return <div className="empty-spatial-stage" data-grid={settings.showGrid?'true':undefined}>
+    <div className="empty-spatial-stage__grid" aria-hidden="true"/>
+    <div className="spatial-axis" aria-hidden="true"><span data-axis="x">X</span><span data-axis="z">Z</span></div>
+    <div className="empty-spatial-stage__message"><span className="empty-spatial-stage__icon"><Icon name="globe" size={20}/></span><strong>{title}</strong><p>{detail}</p></div>
+  </div>;
+}
@@ -0,0 +1,32 @@
+import type {ReactNode, RefObject} from 'react';
+import {StatusBadge} from '@nodedc/ui-react';
+
+/** The existing scene composition. Hosts supply transport/renderers and authority. */
+export function SpatialScene({viewportRef, focused, primaryFocused, mediaMaximized, toolbar,
+  renderer, deviceControls, sourceControls, status, metrics, timeline, media, overlays, footer,
+  navigationReady=false}: {
+  viewportRef: RefObject<HTMLDivElement|null>; focused?:boolean; primaryFocused?:boolean;
+  mediaMaximized?:boolean; toolbar:ReactNode; renderer:ReactNode; deviceControls?:ReactNode;
+  sourceControls?:ReactNode; status:{label:string;tone:'neutral'|'success'|'warning'|'danger';message?:string};
+  metrics:ReactNode; timeline?:ReactNode; media?:ReactNode; overlays?:ReactNode; footer?:ReactNode;
+  navigationReady?:boolean;
+}) {
+  return <div className="spatial-workspace" data-focused={focused?'true':undefined}>
+    <div className="spatial-toolbar" data-viewer-controls="v1"><div className="spatial-toolbar__actions">{toolbar}</div></div>
+    <div ref={viewportRef} className="spatial-viewport-shell" data-primary-focused={primaryFocused?'true':undefined} data-media-maximized={mediaMaximized?'true':undefined}>
+      {renderer}
+      {deviceControls&&<div className="scene-device-controls">{deviceControls}</div>}
+      {sourceControls}
+      <div className="scene-status scene-status--top-left" aria-hidden={primaryFocused||mediaMaximized}>
+        <span className="section-eyebrow">ВИЗУАЛЬНЫЙ ДВИЖОК</span>
+        <StatusBadge tone={status.tone}>{status.label}</StatusBadge>
+        {status.message?<small>{status.message}</small>:null}
+      </div>
+      <div className="scene-metrics" aria-label="Метрики пространственной сцены" aria-hidden={primaryFocused||mediaMaximized}>{metrics}</div>
+      {overlays}
+      {navigationReady&&!mediaMaximized&&<div className="scene-navigation-hint" aria-label="Навигация по 3D-сцене"><span>Колесо · зум к курсору</span><span>WASD · свободный проход</span></div>}
+      {timeline}{media}
+    </div>
+    {footer}
+  </div>;
+}
@@ -8,3 +8,5 @@ export * from './FloatingMediaWindow';
 export * from './ObservationTimeline';
 export * from './sceneSettings';
 export * from './ObservationSourcePicker';
+export * from './SpatialScene';
+export * from './EmptySpatialStage';
@@ -124,19 +124,8 @@ export interface XgridsHostFailureDiagnostic {
  redacted: true;
 }

-export type AcquisitionState =
-  | "preparing"
-  | "prepared"
-  | "awaiting_external_start"
-  | "starting"
-  | "acquiring"
-  | "awaiting_external_stop"
-  | "stopping"
-  | "finalizing"
-  | "completed"
-  | "failed"
-  | "aborted"
-  | "interrupted";
+export type {AcquisitionState} from './spatialSessionModel';
+import type {AcquisitionState} from './spatialSessionModel';

 export type OperationStatus =
  | "accepted"
@@ -832,32 +821,8 @@ export interface XgridsConnectionAttempt extends XgridsConnectionAttemptSummary
  diagnostic_bundle?: XgridsConnectionDiagnosticBundle;
 }

-export interface XgridsK1Metrics {
-  pcl_frames?: number | null;
-  pose_frames?: number | null;
-  mqtt_to_decode_ms?: number | null;
-  decode_ms?: number | null;
-  publish_ms?: number | null;
-  pipeline_ms?: number | null;
-  end_to_end_ms?: number | null;
-  frame_rate?: number | null;
-  frame_rate_hz?: number | null;
-  point_count?: number | null;
-  dropped_preview_frames?: number | null;
-  ai_end_to_end_ms?: number | null;
-  ai_end_to_end_p95_ms?: number | null;
-  ai_frame_rate_hz?: number | null;
-  ai_dropped_frames?: number | null;
-  ai_stale_ms?: number | null;
-  device_elapsed_seconds?: number | null;
-  device_route_distance_meters?: number | null;
-  device_speed_meters_per_second?: number | null;
-  device_speed_mps?: number | null;
-  elapsed_seconds?: number | null;
-  route_distance_meters?: number | null;
-  speed_meters_per_second?: number | null;
-  [key: string]: number | null | undefined;
-}
+export type {XgridsK1Metrics} from './spatialSessionModel';
+import type {XgridsK1Metrics} from './spatialSessionModel';

 export interface XgridsCameraPreviewDelivery {
  id: string;
@@ -1,9 +1,9 @@
-import { ActivityIndicator, Button } from "@nodedc/ui-react";
+import {K1SpatialSession, k1SpatialPhasePresentation} from './K1SpatialSession';
+export {k1SpatialPhasePresentation} from './K1SpatialSession';
+import { Button } from "@nodedc/ui-react";

 import type { DevicePluginConnectionProps } from "@mission-core/plugin-sdk";
 import type {
-  AcquisitionState,
-  XgridsAcquisition,
  XgridsK1State,
 } from "../api";
 import {
@@ -21,7 +21,6 @@ import {
 } from "../lifecycle";
 import {
  deviceTelemetry,
-  formatNumber,
  spatialActionFailure,
 } from "../presentation";
 import {
@@ -34,12 +33,6 @@ import {
 } from "../runtimeContext";
 import { ActiveStreamRecoverySurface } from "./ActiveStreamRecoverySurface";

-interface PhasePresentation {
-  label: string;
-  detail: string;
-  busy: boolean;
-}
-
 export interface K1SpatialAuthorityState {
  controlAuthoritative: boolean;
  dataAuthoritative: boolean;
@@ -64,85 +57,6 @@ export function k1SpatialAuthorityState(
  };
 }

-export function k1SpatialPhasePresentation(
-  acquisition: XgridsAcquisition,
-  softwareCommanded: boolean,
-): PhasePresentation {
-  const presentations: Record<AcquisitionState, PhasePresentation> = {
-    preparing: {
-      label: "Подготовка локального приёма",
-      detail: "Проверка контура и создание сессии записи.",
-      busy: true,
-    },
-    prepared: {
-      label: "Приём подготовлен",
-      detail: softwareCommanded
-        ? "Можно инициировать работу устройства из Mission Core."
-        : "Программная команда K1 недоступна в текущем профиле.",
-      busy: false,
-    },
-    awaiting_external_start: {
-      label: softwareCommanded
-        ? "K1 калибруется и готовит облако точек"
-        : "Ожидание запуска на устройстве",
-      detail: softwareCommanded
-        ? "Первые данные могут появиться через десятки секунд. Не перемещайте устройство."
-        : "Запустите сканирование физической кнопкой K1.",
-      busy: true,
-    },
-    starting: {
-      label: softwareCommanded
-        ? "K1 калибруется и готовит облако точек"
-        : "Подготовка локального приёмника",
-      detail: softwareCommanded
-        ? "Первые данные могут появиться через десятки секунд. Не перемещайте устройство."
-        : "Mission Core запускает запись до физического старта K1.",
-      busy: true,
-    },
-    acquiring: {
-      label: softwareCommanded ? "K1 работает · запись активна" : "Локальная запись активна",
-      detail: softwareCommanded
-        ? "Состояние получено из профилированного контура управления K1."
-        : "Mission Core принимает данные; физическое состояние K1 не управляется программно.",
-      busy: false,
-    },
-    awaiting_external_stop: {
-      label: softwareCommanded ? "K1 завершает и сохраняет" : "Ожидание остановки на устройстве",
-      detail: softwareCommanded
-        ? "STOP не повторяется. Mission Core завершит запись после READY от K1."
-        : "Mission Core ждёт подтверждения физической остановки K1.",
-      busy: true,
-    },
-    stopping: {
-      label: softwareCommanded ? "Остановка K1 и записи" : "Остановка локального приёма",
-      detail: softwareCommanded
-        ? "Команда отправлена; ожидаем подтверждённое состояние устройства."
-        : "Физическое состояние K1 остаётся неизвестным.",
-      busy: true,
-    },
-    finalizing: {
-      label: "Сохранение локальной записи",
-      detail: "Не закрывайте Mission Core до завершения финализации.",
-      busy: true,
-    },
-    completed: { label: "Приём завершён", detail: "", busy: false },
-    failed: { label: "Ошибка приёма", detail: "", busy: false },
-    aborted: { label: "Приём прерван", detail: "", busy: false },
-    interrupted: { label: "Приём прерван", detail: "", busy: false },
-  };
-  return presentations[acquisition.state];
-}
-
-function formatDuration(seconds: number): string {
-  const wholeSeconds = Math.max(0, Math.floor(seconds));
-  const hours = Math.floor(wholeSeconds / 3_600);
-  const minutes = Math.floor((wholeSeconds % 3_600) / 60);
-  const remainder = wholeSeconds % 60;
-  return hours > 0
-    ? `${String(hours).padStart(2, "0")}:${String(minutes).padStart(2, "0")}:${String(remainder).padStart(2, "0")}`
-    : `${String(minutes).padStart(2, "0")}:${String(remainder).padStart(2, "0")}`;
-}
-
 export function runSpatialActiveStreamForceFinish(
  controller: Pick<
    XgridsK1Controller,
@@ -276,30 +190,7 @@ export function K1SpatialControlsView({
  );
  const actionFailure = runtimeActionFailure ?? spatialActionFailure(authorityFailure);
  return (
-    <section
-      className="xgrids-k1-spatial-controls"
-      aria-label="Управление сессией XGRIDS K1"
-      aria-busy={phase.busy}
-      data-busy={phase.busy ? "true" : undefined}
-    >
-      <div className="xgrids-k1-spatial-controls__phase">
-        {phase.busy ? <ActivityIndicator size="compact" /> : null}
-        <span>
-          <strong>{phase.label}</strong>
-          <small>{phase.detail}</small>
-        </span>
-      </div>
-      <div className="xgrids-k1-spatial-controls__telemetry" aria-label="Телеметрия маршрута K1">
-        {telemetry.elapsedSeconds !== null ? (
-          <span><small>Время сканирования</small><strong>{formatDuration(telemetry.elapsedSeconds)}</strong></span>
-        ) : null}
-        {telemetry.routeDistanceMeters !== null ? (
-          <span><small>Маршрут устройства</small><strong>{formatNumber(telemetry.routeDistanceMeters, 2)} м</strong></span>
-        ) : null}
-        {telemetry.speedMetersPerSecond !== null ? (
-          <span><small>Скорость</small><strong>{formatNumber(telemetry.speedMetersPerSecond, 2)} м/с</strong></span>
-        ) : null}
-      </div>
+    <K1SpatialSession phase={phase} telemetry={telemetry}>
      {actionFailure ? (
        <div className="xgrids-k1-spatial-controls__error" role="alert">
          <strong>{actionFailure.title}</strong>
@@ -345,7 +236,7 @@ export function K1SpatialControlsView({
          </span>
        </Button>
      ) : null}
-    </section>
+    </K1SpatialSession>
  );
 }

@@ -0,0 +1,105 @@
+.xgrids-k1-spatial-controls {
+  display: flex;
+  min-width: min(42rem, 100%);
+  max-width: 100%;
+  align-items: center;
+  gap: 0.85rem;
+  border: 1px solid rgb(255 255 255 / 0.1);
+  border-radius: 1rem;
+  background: rgb(9 10 13 / 0.88);
+  padding: 0.55rem 0.65rem 0.55rem 0.75rem;
+  color: var(--nodedc-text-primary);
+  box-shadow: 0 0.9rem 2.4rem rgb(0 0 0 / 0.3);
+  backdrop-filter: blur(20px);
+}
+
+.xgrids-k1-spatial-controls__phase {
+  display: flex;
+  min-width: 11rem;
+  flex: 1 1 15rem;
+  align-items: center;
+  gap: 0.58rem;
+}
+
+.xgrids-k1-spatial-controls__phase > span:last-child {
+  display: grid;
+  min-width: 0;
+  gap: 0.15rem;
+}
+
+.xgrids-k1-spatial-controls__phase strong,
+.xgrids-k1-spatial-controls__phase small {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.xgrids-k1-spatial-controls__phase strong {
+  font-size: 0.66rem;
+}
+
+.xgrids-k1-spatial-controls__phase small {
+  color: var(--nodedc-text-muted);
+  font-size: 0.53rem;
+}
+
+.xgrids-k1-spatial-controls__telemetry {
+  display: flex;
+  flex: 0 1 auto;
+  align-items: center;
+  gap: 0.65rem;
+}
+
+.xgrids-k1-spatial-controls__telemetry > span {
+  display: grid;
+  gap: 0.12rem;
+  white-space: nowrap;
+}
+
+.xgrids-k1-spatial-controls__telemetry small {
+  color: var(--nodedc-text-muted);
+  font-size: 0.48rem;
+}
+
+.xgrids-k1-spatial-controls__telemetry strong {
+  font-size: 0.61rem;
+}
+
+.xgrids-k1-spatial-controls__error {
+  display: grid;
+  max-width: 17rem;
+  gap: 0.12rem;
+  color: rgb(var(--nodedc-danger-rgb));
+}
+
+.xgrids-k1-spatial-controls__error strong {
+  font-size: 0.61rem;
+}
+
+.xgrids-k1-spatial-controls__error small {
+  overflow: hidden;
+  color: var(--nodedc-text-secondary);
+  font-size: 0.51rem;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.xgrids-k1-spatial-controls__action-label {
+  display: block;
+  width: 9.75rem;
+  font-size: 0.66rem;
+  line-height: 1.08;
+  text-align: center;
+  white-space: normal;
+}
+
+.xgrids-k1-spatial-controls__action-label--local {
+  width: 8.75rem;
+}
+
+@media (max-width: 960px) {
+  .xgrids-k1-spatial-controls {min-width:0}
+  .xgrids-k1-spatial-controls__phase small,
+  .xgrids-k1-spatial-controls__telemetry,
+  .xgrids-k1-spatial-controls__error small {display:none}
+}
@@ -0,0 +1,120 @@
+import type {ReactNode} from 'react';
+import {ActivityIndicator} from '@nodedc/ui-react';
+import type {AcquisitionState} from '../spatialSessionModel';
+import {formatNumber, type K1DeviceTelemetry} from '../spatialSessionModel';
+import './K1SpatialSession.css';
+interface PhasePresentation {
+  label: string;
+  detail: string;
+  busy: boolean;
+}
+
+export function k1SpatialPhasePresentation(
+  acquisition: {state:AcquisitionState},
+  softwareCommanded: boolean,
+): PhasePresentation {
+  const presentations: Record<AcquisitionState, PhasePresentation> = {
+    preparing: {
+      label: "Подготовка локального приёма",
+      detail: "Проверка контура и создание сессии записи.",
+      busy: true,
+    },
+    prepared: {
+      label: "Приём подготовлен",
+      detail: softwareCommanded
+        ? "Можно инициировать работу устройства из Mission Core."
+        : "Программная команда K1 недоступна в текущем профиле.",
+      busy: false,
+    },
+    awaiting_external_start: {
+      label: softwareCommanded
+        ? "K1 калибруется и готовит облако точек"
+        : "Ожидание запуска на устройстве",
+      detail: softwareCommanded
+        ? "Первые данные могут появиться через десятки секунд. Не перемещайте устройство."
+        : "Запустите сканирование физической кнопкой K1.",
+      busy: true,
+    },
+    starting: {
+      label: softwareCommanded
+        ? "K1 калибруется и готовит облако точек"
+        : "Подготовка локального приёмника",
+      detail: softwareCommanded
+        ? "Первые данные могут появиться через десятки секунд. Не перемещайте устройство."
+        : "Mission Core запускает запись до физического старта K1.",
+      busy: true,
+    },
+    acquiring: {
+      label: softwareCommanded ? "K1 работает · запись активна" : "Локальная запись активна",
+      detail: softwareCommanded
+        ? "Состояние получено из профилированного контура управления K1."
+        : "Mission Core принимает данные; физическое состояние K1 не управляется программно.",
+      busy: false,
+    },
+    awaiting_external_stop: {
+      label: softwareCommanded ? "K1 завершает и сохраняет" : "Ожидание остановки на устройстве",
+      detail: softwareCommanded
+        ? "STOP не повторяется. Mission Core завершит запись после READY от K1."
+        : "Mission Core ждёт подтверждения физической остановки K1.",
+      busy: true,
+    },
+    stopping: {
+      label: softwareCommanded ? "Остановка K1 и записи" : "Остановка локального приёма",
+      detail: softwareCommanded
+        ? "Команда отправлена; ожидаем подтверждённое состояние устройства."
+        : "Физическое состояние K1 остаётся неизвестным.",
+      busy: true,
+    },
+    finalizing: {
+      label: "Сохранение локальной записи",
+      detail: "Не закрывайте Mission Core до завершения финализации.",
+      busy: true,
+    },
+    completed: { label: "Приём завершён", detail: "", busy: false },
+    failed: { label: "Ошибка приёма", detail: "", busy: false },
+    aborted: { label: "Приём прерван", detail: "", busy: false },
+    interrupted: { label: "Приём прерван", detail: "", busy: false },
+  };
+  return presentations[acquisition.state];
+}
+
+function formatDuration(seconds: number): string {
+  const wholeSeconds = Math.max(0, Math.floor(seconds));
+  const hours = Math.floor(wholeSeconds / 3_600);
+  const minutes = Math.floor((wholeSeconds % 3_600) / 60);
+  const remainder = wholeSeconds % 60;
+  return hours > 0
+    ? `${String(hours).padStart(2, "0")}:${String(minutes).padStart(2, "0")}:${String(remainder).padStart(2, "0")}`
+    : `${String(minutes).padStart(2, "0")}:${String(remainder).padStart(2, "0")}`;
+}
+
+export function K1SpatialSession({phase,telemetry,children}:{phase:PhasePresentation;telemetry:K1DeviceTelemetry;children?:ReactNode}) {
+  return (
+    <section
+      className="xgrids-k1-spatial-controls"
+      aria-label="Управление сессией XGRIDS K1"
+      aria-busy={phase.busy}
+      data-busy={phase.busy ? "true" : undefined}
+    >
+      <div className="xgrids-k1-spatial-controls__phase">
+        {phase.busy ? <ActivityIndicator size="compact" /> : null}
+        <span>
+          <strong>{phase.label}</strong>
+          <small>{phase.detail}</small>
+        </span>
+      </div>
+      <div className="xgrids-k1-spatial-controls__telemetry" aria-label="Телеметрия маршрута K1">
+        {telemetry.elapsedSeconds !== null ? (
+          <span><small>Время сканирования</small><strong>{formatDuration(telemetry.elapsedSeconds)}</strong></span>
+        ) : null}
+        {telemetry.routeDistanceMeters !== null ? (
+          <span><small>Маршрут устройства</small><strong>{formatNumber(telemetry.routeDistanceMeters, 2)} м</strong></span>
+        ) : null}
+        {telemetry.speedMetersPerSecond !== null ? (
+          <span><small>Скорость</small><strong>{formatNumber(telemetry.speedMetersPerSecond, 2)} м/с</strong></span>
+        ) : null}
+      </div>
+      {children}
+    </section>
+  );
+}
@@ -1,3 +1,6 @@
+import {finiteMetric} from './spatialSessionModel';
+export {finiteMetric, deviceTelemetry, formatNumber} from './spatialSessionModel';
+export type {K1DeviceTelemetry} from './spatialSessionModel';
 import type { StatusTone } from "@nodedc/ui-react";

 import type { BackendStatus } from "@mission-core/plugin-sdk";
@@ -295,9 +298,6 @@ export function eventStatusLabel(status: string): string {
  }[status] ?? "неизвестно";
 }

-export function finiteMetric(value: number | null | undefined): number | null {
-  return typeof value === "number" && Number.isFinite(value) ? value : null;
-}

 export function pipelineLatency(metrics: XgridsK1Metrics | undefined): number | null {
  if (!metrics) return null;
@@ -308,17 +308,6 @@ export function pipelineLatency(metrics: XgridsK1Metrics | undefined): number |
  return segments.length === 2 ? segments.reduce((total, value) => total + value, 0) : null;
 }

-function nonNegativeMetric(value: number | null | undefined): number | null {
-  const finite = finiteMetric(value);
-  return finite !== null && finite >= 0 ? finite : null;
-}
-
-export interface K1DeviceTelemetry {
-  elapsedSeconds: number | null;
-  routeDistanceMeters: number | null;
-  speedMetersPerSecond: number | null;
-}
-
 export interface SpatialActionFailure {
  title: string;
  detail: string;
@@ -336,31 +325,6 @@ export function spatialActionFailure(
    : null;
 }

-export function deviceTelemetry(
-  metrics: XgridsK1Metrics | null | undefined,
-): K1DeviceTelemetry {
-  return {
-    elapsedSeconds: nonNegativeMetric(
-      metrics?.device_elapsed_seconds ?? metrics?.elapsed_seconds,
-    ),
-    routeDistanceMeters: nonNegativeMetric(
-      metrics?.device_route_distance_meters ?? metrics?.route_distance_meters,
-    ),
-    speedMetersPerSecond: nonNegativeMetric(
-      metrics?.device_speed_meters_per_second ??
-        metrics?.device_speed_mps ??
-        metrics?.speed_meters_per_second,
-    ),
-  };
-}
-
-export function formatNumber(value: number | null, digits = 1): string {
-  if (value === null) return "—";
-  return value.toLocaleString("ru-RU", {
-    maximumFractionDigits: digits,
-    minimumFractionDigits: digits,
-  });
-}

 export function sourceModeLabel(mode: string | null | undefined): string {
  if (mode === "live") return "Реальное время";
@@ -116,7 +116,7 @@ export function DeviceEnrollmentWindow({transport,onChange,onComplete,renderWind
 }

 return renderWindow({busy:pending,
-  actions:confirmed?<Button variant="primary" disabled={pending}
+  actions:confirmed?<Button variant="primary" style={{width:'100%'}} disabled={pending}
   aria-busy={busy==='opening'} icon={busy==='opening'?<ActivityIndicator size="compact"/>:undefined}
   onClick={()=>void configure()}>Настроить устройство</Button>:undefined,
  content:<div className="sensor-content" ref={content}>
@@ -1,4 +1,7 @@
-import {useRef,useState} from 'react';
+import {K1SpatialSession, k1SpatialPhasePresentation} from '../components/K1SpatialSession';
+import {deviceTelemetry} from '../spatialSessionModel';
+import type {AcquisitionState} from '../spatialSessionModel';
+import {useEffect,useRef,useState} from 'react';
 import {ActivityIndicator,Button,Icon,IconButton,SettingsCard,StatusBadge} from '@nodedc/ui-react';
 import {perform,type Sensor,type SensorTransport} from './runtime';
 import {K1LiveView} from './K1LiveView';
@@ -11,6 +14,9 @@ import {pendingPreview} from './useK1Preview';
 export function K1Detail({device,transport,enabled,back,refresh,failure,createRerunHost}:{device:Sensor;transport:SensorTransport;enabled:boolean;back:()=>void;refresh:()=>Promise<void>;failure:(error:unknown)=>void;createRerunHost?:RerunHostFactory}){
 const [busy,setBusy]=useState(''),[tool,setTool]=useState<SceneTool|null>(null),[operationError,setOperationError]=useState('');
 const [preview,setPreview]=useState(pendingPreview);
+ const [sceneOpen,setSceneOpen]=useState(['preparing','starting','streaming','stopping'].includes(device.snapshot.acquisition));
+ const acquisitionId=device.control?.acquisition_id;
+ useEffect(()=>{if(acquisitionId&&['preparing','starting','streaming','stopping'].includes(device.snapshot.acquisition))setSceneOpen(true);},[acquisitionId]);
 const scene=useK1SceneSettings(device,transport,failure);
 const running=useRef(false);
 const failedAction=useRef('');
@@ -19,6 +25,7 @@ export function K1Detail({device,transport,enabled,back,refresh,failure,createRe
 const pending=busy||(['preparing','starting'].includes(device.snapshot.acquisition)?'start':device.snapshot.acquisition==='stopping'?'stop':'');
 async function act(action:'start'|'stop'|'verify'){
  if(running.current||!enabled)return;
+  if(action==='start')setSceneOpen(true);
  running.current=true;setBusy(action);failedAction.current='';setOperationError('');failure(null);
  try{await perform(transport,device,action,action==='verify'?{}:{operator_confirmed:true,control_generation:device.control?.generation,acquisition_id:device.control?.acquisition_id??null});await refresh();}
  catch{failedAction.current=action;setOperationError(action==='start'?'Результат запуска пока не подтверждён.':action==='stop'?'Результат остановки пока не подтверждён.':'Не удалось подтвердить связь с K1.');await refresh().catch(()=>{});}
@@ -26,6 +33,11 @@ export function K1Detail({device,transport,enabled,back,refresh,failure,createRe
 }
 const confirmed=(failedAction.current==='start'&&streaming)||(failedAction.current==='stop'&&device.control?.phase==='completed')||(failedAction.current==='verify'&&manual.connected);
 const summary=(!confirmed&&operationError)||(pending==='start'?'Запускаем устройство. Ожидаем завершения калибровки.':pending==='stop'?'Останавливаем устройство. Ожидаем подтверждения.':!manual.connected?k1ConnectionNotice(device,enabled):status.label);
+ const phaseName = (device.control?.acquisition_phase || (pending==='start'?'starting':pending==='stop'?'stopping':streaming?'acquiring':'completed')) as AcquisitionState;
+ const phase = k1SpatialPhasePresentation({state:phaseName},true) ?? {label:summary,detail:'',busy:!!pending};
+ const sessionControls = <K1SpatialSession phase={!enabled?{label:'Нет свежих сведений с БК',detail:'Ожидаем восстановления связи.',busy:false}:phase} telemetry={deviceTelemetry(device.frames)}>
+   {manual.showStop&&<Button size="compact" disabled={!manual.connected||!!pending||(!streaming&&!device.control?.can_stop)} aria-busy={pending==='stop'} icon={pending==='stop'?<ActivityIndicator size="compact"/>:undefined} onClick={()=>void act('stop')}><span className="xgrids-k1-spatial-controls__action-label">{pending==='stop'?'Остановка устройства…':'Остановить устройство и запись'}</span></Button>}
+ </K1SpatialSession>;
 return <div className="sensor-content">
  <div className="sensor-actions sensor-inventory-toolbar"><Button onClick={back}>К устройствам</Button><StatusBadge tone={status.tone}>{status.label}</StatusBadge></div>
  <SettingsCard title={device.name} description="Ручной запуск камеры и лидара на бортовом компьютере. Исходные данные записи сохраняются на БК."
@@ -38,6 +50,7 @@ export function K1Detail({device,transport,enabled,back,refresh,failure,createRe
  </SettingsCard>
  <SettingsCard title="Статус" role="status" aria-live="polite"><p className="k1-preview-status">{streaming?`${summary}. ${preview.lidar}. ${preview.camera}.`:summary}</p></SettingsCard>
  {manual.connected&&<K1SceneWindows tool={tool} close={()=>setTool(null)} scene={scene} connected={enabled}/>}
-  {streaming&&createRerunHost&&<K1LiveView device={device} transport={transport} createRerunHost={createRerunHost} onStatus={setPreview} enabled={enabled} scene={scene} openTool={setTool}/>}
+  {!sceneOpen&&manual.showStop&&<Button onClick={()=>setSceneOpen(true)}>Открыть пространственную сцену</Button>}
+  {sceneOpen&&createRerunHost&&<K1LiveView device={device} transport={transport} createRerunHost={createRerunHost} onStatus={setPreview} enabled={enabled&&streaming} scene={scene} openTool={setTool} close={()=>setSceneOpen(false)} sessionControls={sessionControls}/>}
 </div>;
 }
@@ -1,11 +1,12 @@
+import type {ReactNode} from 'react';
 import { useCallback, useEffect, useRef, useState } from 'react';
-import { Icon, IconButton, SettingsCard, StatusBadge } from '@nodedc/ui-react';
-import { FloatingMediaWindow, ObservationSourcePicker, ObservationTimeline, SpatialToolbarActions, type ObservationWindowRect, type RerunHostFactory, type SpatialSourceDescriptor } from '@mission-core/sensor-sdk';
+import { ApplicationPanel, Icon, IconButton, StatusBadge } from '@nodedc/ui-react';
+import { SpatialScene, EmptySpatialStage, FloatingMediaWindow, ObservationSourcePicker, ObservationTimeline, SpatialToolbarActions, type ObservationWindowRect, type RerunHostFactory, type SpatialSourceDescriptor } from '@mission-core/sensor-sdk';
 import type { Sensor, SensorTransport } from './runtime';
 import type { K1SceneState, SceneTool } from './K1SceneWindows';
 import { useK1Preview, pendingPreview, type PreviewStatus } from './useK1Preview';
 import './livePreview.css';
-export function K1LiveView({ device, transport, createRerunHost, onStatus, enabled, scene, openTool }: {
+export function K1LiveView({ device, transport, createRerunHost, onStatus, enabled, scene, openTool, close, sessionControls }: {
    device: Sensor;
    transport: SensorTransport;
    createRerunHost: RerunHostFactory;
@@ -13,8 +14,10 @@ export function K1LiveView({ device, transport, createRerunHost, onStatus, enabl
    enabled: boolean;
    scene: K1SceneState;
    openTool: (tool: SceneTool) => void;
+    close: () => void; sessionControls: ReactNode;
 }) {
    const spatial = useRef<HTMLDivElement>(null), viewport = useRef<HTMLDivElement>(null), video = useRef<HTMLVideoElement>(null);
+    const [focused, setFocused] = useState(false);
    const [expanded, setExpanded] = useState(false), [cameraMaximized, setCameraMaximized] = useState(false), [cameraRect, setCameraRect] = useState<ObservationWindowRect>();
    const [visible, setVisible] = useState(() => new Set(['lidar', 'camera']));
    const [generation, setGeneration] = useState(0), [status, setStatus] = useState<PreviewStatus>(pendingPreview);
@@ -31,6 +34,7 @@ export function K1LiveView({ device, transport, createRerunHost, onStatus, enabl
        return; const timer = setTimeout(() => { attempts.current = 0; }, 10000); return () => clearTimeout(timer); }, [status.presented]);
    useEffect(() => { const key = (event: KeyboardEvent) => { if (event.key === 'Escape') {
        setExpanded(false);
+        setFocused(false);
        setCameraMaximized(false);
    } }; window.addEventListener('keydown', key); return () => window.removeEventListener('keydown', key); }, []);
    const sources: SpatialSourceDescriptor[] = [
@@ -41,29 +45,38 @@ export function K1LiveView({ device, transport, createRerunHost, onStatus, enabl
        next.delete(id);
    else
        next.add(id); return next; });
-    return <SettingsCard title="Пространственная модель" className={expanded ? 'k1-preview sensor-viewer-expanded' : 'k1-preview'} actions={<IconButton label={expanded ? 'Свернуть просмотр' : 'Развернуть просмотр'} onClick={() => setExpanded(value => !value)}><Icon name={expanded ? 'minimize' : 'expand'}/></IconButton>}>
-  <div className="spatial-workspace" data-focused={cameraMaximized ? 'true' : undefined}>
-   <div className="spatial-toolbar" data-viewer-controls="v1"><div className="spatial-toolbar__actions"><SpatialToolbarActions openSource={() => openTool('source')} openLayers={() => openTool('layers')} openDisplay={() => openTool('display')}/></div></div>
-   <div ref={viewport} className="spatial-viewport-shell" data-media-maximized={cameraMaximized ? 'true' : undefined}>
-    <div className="rerun-viewport" data-status={status.presented ? 'ready' : 'loading'}>
-     <div className="rerun-viewport__canvas" data-presented={status.presented && visible.has('lidar') ? 'true' : 'false'} ref={spatial}/>
-    </div>
-    {!cameraMaximized && <div className="scene-source-controls"><ObservationSourcePicker sources={sources} visibleSourceIds={visible} onToggle={toggle}/></div>}
-    <div className="scene-status scene-status--top-left" aria-hidden={cameraMaximized}>
-     <span className="section-eyebrow">ВИЗУАЛЬНЫЙ ДВИЖОК</span><StatusBadge tone={status.presented ? 'success' : 'neutral'}>{status.presented ? 'Визуализатор готов' : status.retry ? 'Восстановление связи' : 'Ожидаем свежие данные'}</StatusBadge>
-    </div>
-    <div className="scene-metrics" aria-label="Метрики пространственной сцены" aria-hidden={cameraMaximized}>
-     <div><span>КАДР/С</span><strong>{status.presented ? (device.frames?.pcl_fps ?? 0).toFixed(1) : '—'}</strong></div>
-     <div><span>До публикации</span><strong>{status.presented && device.frames?.mqtt_to_publish_ms != null ? device.frames.mqtt_to_publish_ms.toFixed(1) : '—'}<small> мс</small></strong></div>
-     <div><span>Точек в кадре</span><strong>{status.presented ? status.points.toLocaleString('ru-RU') : '—'}</strong></div>
-    </div>
-    {status.presented && !cameraMaximized && <div className="scene-navigation-hint" aria-label="Навигация по 3D-сцене"><span>Колесо · зум к курсору</span><span>WASD · свободный проход</span></div>}
-    {!cameraMaximized && <ObservationTimeline active={status.presented} sourceCount={visible.size} mode="live-only" accumulationSeconds={scene.draft.accumulationSeconds} onAccumulationChange={accumulationSeconds => scene.stage({ accumulationSeconds })} onAccumulationCommit={scene.flush} className="scene-timeline"/>}
-    <FloatingMediaWindow title="Камера K1" boundsRef={viewport} rect={cameraRect} maximized={cameraMaximized} active={cameraMaximized} hidden={!visible.has('camera')} onRectChange={setCameraRect} onMaximizedChange={setCameraMaximized} onActivate={() => { }} onClose={() => { setCameraMaximized(false); setVisible(current => { const next = new Set(current); next.delete('camera'); return next; }); }} status={<span className="floating-observation-window__status">{status.cameraPresented ? 'Эфир' : 'Ожидание'}</span>} footer={<span className="floating-observation-window__footer"><span>Бортовой компьютер</span><span>Эфир без буфера</span></span>}>
-     <video className="observation-media__asset" style={{ visibility: status.cameraPresented ? 'visible' : 'hidden' }} ref={video} muted autoPlay playsInline aria-label="Камера K1"/>
-     {!status.cameraPresented && <div className="observation-media__empty k1-camera-notice" role="status"><Icon name="video"/><span>{status.camera}</span></div>}
-    </FloatingMediaWindow>
-   </div>
-  </div>
- </SettingsCard>;
+    const hasScene = status.hasScene;
+    const focusedAny = focused || cameraMaximized;
+    return <ApplicationPanel title="Пространственная сцена" className={expanded ? 'k1-preview sensor-viewer-expanded' : 'k1-preview'}
+      expanded={expanded} onExpandedChange={setExpanded} onClose={close}
+      headerTools={<StatusBadge tone={status.presented?'success':'neutral'}>{status.presented?'Эфир':'Ожидание эфира'}</StatusBadge>}>
+      <SpatialScene viewportRef={viewport} focused={focusedAny} primaryFocused={focused} mediaMaximized={cameraMaximized}
+        toolbar={<SpatialToolbarActions openSource={()=>openTool('source')} openLayers={()=>openTool('layers')} openDisplay={()=>openTool('display')}/>}
+        renderer={<>
+          <div className="rerun-viewport" data-status={hasScene?'ready':'loading'}>
+            <div className="rerun-viewport__canvas" data-presented={hasScene&&visible.has('lidar')?'true':'false'} ref={spatial}/>
+          </div>
+          {!hasScene&&<EmptySpatialStage settings={scene.draft} title="Ожидаем данные K1" detail="Пространственная сцена появится после получения облака точек."/>}
+        </>}
+        deviceControls={sessionControls}
+        sourceControls={focused?<IconButton className="scene-focus-exit" label="Выйти из полноэкранного режима облака точек" onClick={()=>setFocused(false)}><Icon name="minimize"/></IconButton>:!cameraMaximized&&<div className="scene-source-controls">
+          <ObservationSourcePicker sources={sources} visibleSourceIds={visible} onToggle={toggle}/>
+          {hasScene&&visible.has('lidar')&&<IconButton className="scene-source-control" label="Развернуть облако точек" onClick={()=>setFocused(true)}><Icon name="expand"/></IconButton>}
+        </div>}
+        status={{tone:status.presented?'success':'neutral',label:status.presented?'Визуализатор готов':status.retry?'Восстановление связи':hasScene?'Нет свежих данных':'Ожидание источника'}}
+        metrics={<>
+          <div><span>КАДР/С</span><strong>{status.presented?(device.frames?.pcl_fps??device.frames?.frame_rate_hz??0).toFixed(1):'—'}</strong></div>
+          <div><span>Точек</span><strong>{status.presented?status.points.toLocaleString('ru-RU'):'—'}</strong></div>
+          <div><span>До публикации</span><strong>{status.presented&&device.frames?.mqtt_to_publish_ms!=null?device.frames.mqtt_to_publish_ms.toFixed(1):'—'}<small> мс</small></strong></div>
+        </>}
+        navigationReady={hasScene}
+        timeline={!focusedAny&&<ObservationTimeline active={status.presented} sourceCount={visible.size} mode="live-only" accumulationSeconds={scene.draft.accumulationSeconds} onAccumulationChange={accumulationSeconds=>scene.stage({accumulationSeconds})} onAccumulationCommit={scene.flush} className="scene-timeline"/>}
+        media={<FloatingMediaWindow title="K1 · камера справа" subtitle="Видеоканал, опубликованный активным устройством" boundsRef={viewport} rect={cameraRect} maximized={cameraMaximized} active={cameraMaximized} hidden={focused||!visible.has('camera')} onRectChange={setCameraRect} onMaximizedChange={setCameraMaximized} onActivate={()=>{}} onClose={()=>{setCameraMaximized(false);setVisible(current=>{const next=new Set(current);next.delete('camera');return next;});}}
+          status={<span className="floating-observation-window__status">{status.cameraPresented?'Эфир':'Ожидание'}</span>}
+          footer={<span className="floating-observation-window__footer"><span>Бортовой компьютер</span><span>Эфир без буфера</span></span>}>
+          <video className="observation-media__asset" style={{visibility:status.cameraPresented?'visible':'hidden'}} ref={video} muted autoPlay playsInline aria-label="Камера K1"/>
+          {!status.cameraPresented&&<div className="observation-media__empty k1-camera-notice" role="status"><Icon name="video"/><span>{status.camera}</span></div>}
+        </FloatingMediaWindow>}
+      />
+    </ApplicationPanel>;
 }
@@ -1,5 +1,5 @@
 /** Ordered data-channel fragments are reassembled before a decoder sees them. */
-export const MEDIA_PROTOCOL='missioncore.node-preview/v2';
+export const MEDIA_PROTOCOL='missioncore.node-preview/v3';
 const MAX_PAYLOAD=8*1024*1024,FRAGMENT_BYTES=16384;
 export function previewFrames(accept:(payload:Uint8Array<ArrayBuffer>)=>void) {
 let pending:Uint8Array<ArrayBuffer>|null=null,offset=0;
@@ -23,3 +23,17 @@ export function previewFrames(accept:(payload:Uint8Array<ArrayBuffer>)=>void) {
 export function assertRrd(bytes:Uint8Array){
 if(bytes.length<12||bytes[0]!==82||bytes[1]!==82||bytes[2]!==70||bytes[3]!==50)throw new Error('Invalid RRD recording');
 }
+
+/** Kept by the acquisition view while disposable media peers reconnect. */
+export function previewRecording(send:(payload:Uint8Array<ArrayBuffer>)=>void) {
+ let after=0;
+ return {
+  get after(){return after;},
+  accept(sequence:number,payload:Uint8Array<ArrayBuffer>) {
+   assertRrd(payload);
+   if(!Number.isSafeInteger(sequence)||sequence<1||sequence>after+1)throw new Error('Preview cursor gap');
+   if(sequence<=after)return false;
+   send(payload);after=sequence;return true;
+  },
+ };
+}
@@ -1,7 +1,7 @@
 import { useEffect, useState, type RefObject } from 'react';
 import type { RerunHostFactory, LiveRerunViewer } from '@mission-core/sensor-sdk';
 import { perform, type Sensor, type SensorTransport } from './runtime';
-import { assertRrd, MEDIA_PROTOCOL, previewFrames } from './previewFrames';
+import { MEDIA_PROTOCOL, previewFrames, previewRecording } from './previewFrames';
 import { previewCamera } from './previewCamera';
 import { previewFreshness } from './previewFreshness';
 export type PreviewStatus = {
@@ -9,10 +9,11 @@ export type PreviewStatus = {
    camera: string;
    retry: boolean;
    presented: boolean;
+    hasScene: boolean;
    cameraPresented: boolean;
    points: number;
 };
-export const pendingPreview: PreviewStatus = { lidar: 'Лидар: ожидаем данные', camera: 'Камера: ожидаем изображение', retry: false, presented: false, cameraPresented: false, points: 0 };
+export const pendingPreview: PreviewStatus = { lidar: 'Лидар: ожидаем данные', camera: 'Камера: ожидаем изображение', retry: false, presented: false, hasScene: false, cameraPresented: false, points: 0 };
 function privateCandidate(sdp: string): string {
    return sdp.split('\r\n').filter(line => {
        if (!line.startsWith('a=candidate:'))
@@ -24,8 +25,7 @@ function privateCandidate(sdp: string): string {
 }
 export function useK1Preview(device: Sensor, transport: SensorTransport, createRerunHost: RerunHostFactory, spatial: RefObject<HTMLDivElement | null>, video: RefObject<HTMLVideoElement | null>, onStatus: (value: PreviewStatus) => void, generation = 0, enabled = true) {
    const [native, setNative] = useState<LiveRerunViewer | null>(null);
-    // The native runtime belongs to the view. Media recovery opens a new recording
-    // channel inside it; it never downloads/recreates the WASM iframe on each retry.
+    // The runtime and native channel belong to this acquisition view, not its peers.
    useEffect(() => {
        let active = true;
        const host = createRerunHost(spatial.current!);
@@ -43,13 +43,31 @@ export function useK1Preview(device: Sensor, transport: SensorTransport, createR
            onStatus({ ...pendingPreview, lidar: 'Визуализатор не загрузился. Обновите страницу.' }); });
        return () => { active = false; setNative(null); host.dispose(); };
    }, [createRerunHost, spatial, onStatus]);
+    const [view, setView] = useState<{
+        id: string; session: string; acquisition: string | null | undefined; channel: ReturnType<LiveRerunViewer['open_channel']>;
+        recording: ReturnType<typeof previewRecording>; previousRecording: string | null; hasScene: boolean;
+    } | null>(null);
    useEffect(() => {
-        onStatus(enabled ? { ...pendingPreview } : { ...pendingPreview, lidar: 'Лидар: нет связи с БК', camera: 'Камера: нет связи с БК' });
-        if (!native || !enabled)
+        if (!native) return;
+        const id = crypto.randomUUID();
+        const channel = native.open_channel('live-acquisition:' + device.snapshot.context.session_id + ':' + device.control?.acquisition_id + ':' + id);
+        setView({id, session:device.snapshot.context.session_id, acquisition:device.control?.acquisition_id, channel, recording: previewRecording(bytes => {if (!channel.ready) throw new Error('Viewer unavailable'); channel.send_rrd(bytes);}), previousRecording: native.get_active_recording_id(), hasScene: false});
+        return () => { setView(null); channel.close();
+            void perform(transport, device, 'close-peer', {view_id:id, retire_view:true}).catch(()=>{});
+        };
+    }, [native, device.snapshot.context.session_id, device.control?.acquisition_id, transport]);
+    useEffect(() => {
+        const currentView = view?.session === device.snapshot.context.session_id && view?.acquisition === device.control?.acquisition_id;
+        const paused = device.snapshot.acquisition === 'streaming'
+            ? {lidar:'Лидар: нет связи с БК', camera:'Камера: нет связи с БК'}
+            : ['starting','preparing'].includes(device.snapshot.acquisition)
+                ? {} : {lidar:'Лидар: приём завершён', camera:'Камера: изображение остановлено'};
+        onStatus({...pendingPreview, hasScene:currentView ? view?.hasScene ?? false : false, ...(!enabled ? paused : {})});
+        if (!native || !view || !currentView || !enabled)
            return;
        let active = true, failed = false, peerID: string | undefined;
        let keepalive: ReturnType<typeof setInterval> | undefined, follow: ReturnType<typeof setInterval> | undefined, iceTimeout: ReturnType<typeof setTimeout> | undefined;
-        let status = { ...pendingPreview };
+        let status = { ...pendingPreview, hasScene: view.hasScene };
        const update = (patch: Partial<PreviewStatus>) => { if (active) {
            const next = { ...status, ...patch };
            if (JSON.stringify(next) !== JSON.stringify(status)) {
@@ -62,16 +80,23 @@ export function useK1Preview(device: Sensor, transport: SensorTransport, createR
        const rrd = pc.createDataChannel('rrd', { ordered: true }), camera = pc.createDataChannel('camera', { ordered: true });
        rrd.binaryType = 'arraybuffer';
        camera.binaryType = 'arraybuffer';
-        const previousRecording = viewer.get_active_recording_id();
-        const channel = viewer.open_channel('live-acquisition:' + device.snapshot.context.session_id + ':' + device.control?.acquisition_id + ':' + generation);
+        const {channel, previousRecording} = view;
        const fail = () => { if (!active || failed)
            return; failed = true; update({ lidar: 'Лидар: восстанавливаем связь', camera: 'Камера: ожидаем соединение', retry: true, presented: false, cameraPresented: false }); clearInterval(follow); clearInterval(keepalive); pc.close(); };
        let cameraDecoded = false, cameraFailed = false, lastVideoTime = -1, lastVideoProgress = 0, seenLidar = false;
        const cameraFail = () => { cameraFailed = true; update({ camera: 'Камера: изображение недоступно', cameraPresented: false }); camera.close(); };
-        const decoder = previewCamera(video.current!, () => { cameraDecoded = true; lastVideoProgress = performance.now(); }, cameraFail);
+        let decoder = previewCamera(video.current!, () => { cameraDecoded = true; lastVideoProgress = performance.now(); }, cameraFail);
        const cameraFrames = previewFrames(payload => decoder.push(payload));
-        const rrdFrames = previewFrames(payload => { assertRrd(payload); if (!channel.ready)
-            throw new Error('Viewer unavailable'); channel.send_rrd(payload); });
+        let batch: {sequence: number; lidar: Record<string, unknown>; received: number} | null = null;
+        const rrdFrames = previewFrames(payload => {
+            if (!batch || !channel.ready) throw new Error('Viewer unavailable');
+            if (view.recording.accept(batch.sequence, payload)) {
+                const age = batch.lidar.age_ms;
+                freshness.receive({...batch.lidar, age_ms: typeof age === 'number' ? age + performance.now() - batch.received : age});
+            }
+            rrd.send(JSON.stringify({ack: batch.sequence}));
+            batch = null;
+        });
        rrd.onclose = () => { if (active && !failed)
            fail(); };
        camera.onclose = () => { if (active && !failed)
@@ -80,8 +105,17 @@ export function useK1Preview(device: Sensor, transport: SensorTransport, createR
            if (!active)
                return;
            try {
-                if (typeof event.data === 'string')
-                    freshness.receive(JSON.parse(event.data));
+                if (typeof event.data === 'string') {
+                    const value = JSON.parse(event.data);
+                    if (value.type === 'preview-unavailable' && value.code === 'resume-expired') {
+                        failed = true; clearInterval(follow); clearInterval(keepalive);
+                        update({retry:false, presented:false, cameraPresented:false, lidar:'Сессия просмотра истекла. Закройте и откройте пространственную сцену.'});
+                        pc.close(); return;
+                    }
+                    if (batch || value.type !== 'rrd-batch' || !Number.isSafeInteger(value.sequence) || value.sequence < 1 || !value.lidar)
+                        throw new Error('Invalid RRD batch');
+                    batch = {...value, received: performance.now()};
+                }
                else if (event.data instanceof ArrayBuffer)
                    rrdFrames.push(event.data);
            }
@@ -97,6 +131,9 @@ export function useK1Preview(device: Sensor, transport: SensorTransport, createR
                    const metadata = JSON.parse(event.data);
                    if (metadata.type !== 'camera-ready' || typeof metadata.mime !== 'string')
                        throw new Error('Invalid camera metadata');
+                    decoder.close();
+                    cameraDecoded = false; cameraFailed = false; lastVideoTime = -1;
+                    decoder = previewCamera(video.current!, () => {cameraDecoded = true; lastVideoProgress = performance.now();}, cameraFail);
                    decoder.open(metadata.mime);
                }
                else if (event.data instanceof ArrayBuffer)
@@ -128,13 +165,14 @@ export function useK1Preview(device: Sensor, transport: SensorTransport, createR
                }
                catch { /* Native recording/timeline creation is asynchronous. */ }
                seenLidar ||= presented;
+                view.hasScene ||= presented;
                const v = video.current!;
                if (cameraDecoded && v.currentTime !== lastVideoTime) {
                    lastVideoTime = v.currentTime;
                    lastVideoProgress = performance.now();
                }
                const cameraPresented = cameraDecoded && !cameraFailed && performance.now() - lastVideoProgress < 2000;
-                update({ presented, cameraPresented, points: presented ? freshness.points : 0,
+                update({ presented, hasScene: view.hasScene, cameraPresented, points: presented ? freshness.points : 0,
                    lidar: presented ? 'Лидар: данные поступают' : seenLidar ? 'Лидар: нет свежих данных' : 'Лидар: ожидаем данные',
                    camera: cameraFailed ? 'Камера: изображение недоступно' : cameraPresented ? 'Камера: изображение поступает' : cameraDecoded ? 'Камера: нет свежих кадров' : 'Камера: ожидаем изображение' });
            }, 250);
@@ -154,7 +192,7 @@ export function useK1Preview(device: Sensor, transport: SensorTransport, createR
                sdp: string;
                type: 'answer';
                media_protocol: string;
-            }>(transport, device, 'offer', { sdp: privateCandidate(pc.localDescription!.sdp), acquisition_id: device.control?.acquisition_id });
+            }>(transport, device, 'offer', { sdp: privateCandidate(pc.localDescription!.sdp), acquisition_id: device.control?.acquisition_id, view_id: view.id, after: view.recording.after });
            peerID = answer.peer_id;
            if (!active) {
                void perform(transport, device, 'close-peer', { peer_id: peerID }).catch(() => { });
@@ -190,9 +228,8 @@ export function useK1Preview(device: Sensor, transport: SensorTransport, createR
            rrdFrames.close();
            cameraFrames.close();
            decoder.close();
-            channel.close();
            if (peerID)
                void perform(transport, device, 'close-peer', { peer_id: peerID }).catch(() => { });
        };
-    }, [native, device.snapshot.context.session_id, device.control?.acquisition_id, transport, onStatus, video, generation, enabled]);
+    }, [native, view, device.snapshot.context.session_id, device.control?.acquisition_id, transport, onStatus, video, generation, enabled]);
 }
@@ -0,0 +1,84 @@
+/** Pure K1 telemetry and phase vocabulary, shared by direct and onboard views. */
+export type AcquisitionState =
+  | "preparing"
+  | "prepared"
+  | "awaiting_external_start"
+  | "starting"
+  | "acquiring"
+  | "awaiting_external_stop"
+  | "stopping"
+  | "finalizing"
+  | "completed"
+  | "failed"
+  | "aborted"
+  | "interrupted";
+
+export interface XgridsK1Metrics {
+  pcl_frames?: number | null;
+  pose_frames?: number | null;
+  mqtt_to_decode_ms?: number | null;
+  decode_ms?: number | null;
+  publish_ms?: number | null;
+  pipeline_ms?: number | null;
+  end_to_end_ms?: number | null;
+  frame_rate?: number | null;
+  frame_rate_hz?: number | null;
+  point_count?: number | null;
+  dropped_preview_frames?: number | null;
+  ai_end_to_end_ms?: number | null;
+  ai_end_to_end_p95_ms?: number | null;
+  ai_frame_rate_hz?: number | null;
+  ai_dropped_frames?: number | null;
+  ai_stale_ms?: number | null;
+  device_elapsed_seconds?: number | null;
+  device_route_distance_meters?: number | null;
+  device_speed_meters_per_second?: number | null;
+  device_speed_mps?: number | null;
+  elapsed_seconds?: number | null;
+  route_distance_meters?: number | null;
+  speed_meters_per_second?: number | null;
+  [key: string]: number | null | undefined;
+}
+
+export function finiteMetric(value: number | null | undefined): number | null {
+  return typeof value === "number" && Number.isFinite(value) ? value : null;
+}
+
+function nonNegativeMetric(value: number | null | undefined): number | null {
+  const finite = finiteMetric(value);
+  return finite !== null && finite >= 0 ? finite : null;
+}
+
+export interface K1DeviceTelemetry {
+  elapsedSeconds: number | null;
+  routeDistanceMeters: number | null;
+  speedMetersPerSecond: number | null;
+}
+
+
+export function deviceTelemetry(
+  metrics: XgridsK1Metrics | null | undefined,
+): K1DeviceTelemetry {
+  return {
+    elapsedSeconds: nonNegativeMetric(
+      metrics?.device_elapsed_seconds ?? metrics?.elapsed_seconds,
+    ),
+    routeDistanceMeters: nonNegativeMetric(
+      metrics?.device_route_distance_meters ?? metrics?.route_distance_meters,
+    ),
+    speedMetersPerSecond: nonNegativeMetric(
+      metrics?.device_speed_meters_per_second ??
+        metrics?.device_speed_mps ??
+        metrics?.speed_meters_per_second,
+    ),
+  };
+}
+
+export function formatNumber(value: number | null, digits = 1): string {
+  if (value === null) return "—";
+  return value.toLocaleString("ru-RU", {
+    maximumFractionDigits: digits,
+    minimumFractionDigits: digits,
+  });
+}
+
@@ -984,21 +984,6 @@ box-sizing: border-box;
  }
 }

-.xgrids-k1-spatial-controls {
-  display: flex;
-  min-width: min(42rem, 100%);
-  max-width: 100%;
-  align-items: center;
-  gap: 0.85rem;
-  border: 1px solid rgb(255 255 255 / 0.1);
-  border-radius: 1rem;
-  background: rgb(9 10 13 / 0.88);
-  padding: 0.55rem 0.65rem 0.55rem 0.75rem;
-  color: var(--nodedc-text-primary);
-  box-shadow: 0 0.9rem 2.4rem rgb(0 0 0 / 0.3);
-  backdrop-filter: blur(20px);
-}
-
 .xgrids-k1-spatial-controls--recovery {
  display: grid;
  min-width: min(46rem, 100%);
@@ -1108,90 +1093,6 @@ box-sizing: border-box;
  display: none;
 }

-.xgrids-k1-spatial-controls__phase {
-  display: flex;
-  min-width: 11rem;
-  flex: 1 1 15rem;
-  align-items: center;
-  gap: 0.58rem;
-}
-
-.xgrids-k1-spatial-controls__phase > span:last-child {
-  display: grid;
-  min-width: 0;
-  gap: 0.15rem;
-}
-
-.xgrids-k1-spatial-controls__phase strong,
-.xgrids-k1-spatial-controls__phase small {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-.xgrids-k1-spatial-controls__phase strong {
-  font-size: 0.66rem;
-}
-
-.xgrids-k1-spatial-controls__phase small {
-  color: var(--nodedc-text-muted);
-  font-size: 0.53rem;
-}
-
-.xgrids-k1-spatial-controls__telemetry {
-  display: flex;
-  flex: 0 1 auto;
-  align-items: center;
-  gap: 0.65rem;
-}
-
-.xgrids-k1-spatial-controls__telemetry > span {
-  display: grid;
-  gap: 0.12rem;
-  white-space: nowrap;
-}
-
-.xgrids-k1-spatial-controls__telemetry small {
-  color: var(--nodedc-text-muted);
-  font-size: 0.48rem;
-}
-
-.xgrids-k1-spatial-controls__telemetry strong {
-  font-size: 0.61rem;
-}
-
-.xgrids-k1-spatial-controls__error {
-  display: grid;
-  max-width: 17rem;
-  gap: 0.12rem;
-  color: rgb(var(--nodedc-danger-rgb));
-}
-
-.xgrids-k1-spatial-controls__error strong {
-  font-size: 0.61rem;
-}
-
-.xgrids-k1-spatial-controls__error small {
-  overflow: hidden;
-  color: var(--nodedc-text-secondary);
-  font-size: 0.51rem;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-.xgrids-k1-spatial-controls__action-label {
-  display: block;
-  width: 9.75rem;
-  font-size: 0.66rem;
-  line-height: 1.08;
-  text-align: center;
-  white-space: normal;
-}
-
-.xgrids-k1-spatial-controls__action-label--local {
-  width: 8.75rem;
-}
-
 .connection-action-progress {
  display: flex;
  min-height: 2.75rem;
@@ -22,7 +22,7 @@ from credential_install import PROFILE_ID, validate  # noqa: E402
 from debian import package  # noqa: E402
 from runtime_payload import files as runtime_files  # noqa: E402

-VERSION = "0.1.9"
+VERSION = "0.1.10"
 RESOURCES = (
    "plugins/xgrids-k1/profile_loader.py",
    "plugins/xgrids-k1/plugin.manifest.json",
@@ -135,7 +135,7 @@ Architecture: amd64
 Maintainer: NODE.DC local build <noreply@example.invalid>
 Section: admin
 Priority: optional
-Depends: mission-core-node (>= 0.8.9), mission-core-node (<< 0.9.0),
+Depends: mission-core-node (>= 0.8.10), mission-core-node (<< 0.9.0),
 systemd, python3, adduser, bluez, network-manager, iproute2, ffmpeg
 Breaks: mission-core-node (<< 0.8.0)
 Replaces: mission-core-node (<< 0.8.0)
@@ -98,6 +98,7 @@ def project_sensor(snapshot, node_id):
            "network_applied": connected or attempt.get("phase") == "network_applied",
            "reason_code": None if connected else attempt.get("public_error_code"),
            "acquisition_id": acquisition.get("acquisition_id"),
+            "acquisition_phase": acquisition.get("state"),
        },
        "live_settings": snapshot.get("viewer_settings", {}),
        "frames": snapshot.get("metrics", {}),
@@ -149,6 +150,8 @@ class NodeK1Sensor:
            return item
        if action == "close-peer":
            await self.peers.close(params.get("peer_id"))
+            if params.get("retire_view") is True:
+                await self.peers.release_view(params.get("view_id"))
            return {"ok": True}
        if action == "offer":
            acquisition_id = item["control"]["acquisition_id"]
@@ -8,12 +8,14 @@ import queue
 import time
 from contextlib import suppress
 from itertools import chain
-from uuid import uuid4
+from uuid import UUID, uuid4

 import aioice.ice
 from aiortc import RTCConfiguration, RTCPeerConnection, RTCSessionDescription

-MEDIA_PROTOCOL = "missioncore.node-preview/v2"
+from .node_rerun import PreviewResumeError
+
+MEDIA_PROTOCOL = "missioncore.node-preview/v3"
 MAX_PAYLOAD = 8 * 1024 * 1024
 FRAGMENT_BYTES = 16384
 logger = logging.getLogger(__name__)
@@ -60,11 +62,17 @@ class NodeMediaPeers:

    async def offer(self, parameters):
        admit_sdp(parameters.get("sdp"))
+        view_id, after = parameters.get("view_id"), parameters.get("after", 0)
+        if not isinstance(view_id, str) or str(UUID(view_id)) != view_id:
+            raise ValueError("Preview view identifier required")
+        if type(after) is not int or not 0 <= after <= 2**53 - 1:
+            raise ValueError("Invalid preview cursor")
        if len(self.items) >= 2:
            raise ValueError("Close another live viewer")
        pc = RTCPeerConnection(RTCConfiguration(iceServers=[]))
        identifier = "peer_" + uuid4().hex
-        entry = {"pc": pc, "seen": time.monotonic(), "tasks": [], "labels": set()}
+        entry = {"pc": pc, "seen": time.monotonic(), "tasks": [], "labels": set(),
+                 "view_id": view_id, "after": after, "subscriber": None}
        self.items[identifier] = entry

        @pc.on("datachannel")
@@ -78,6 +86,14 @@ class NodeMediaPeers:
            def message(value):
                if value == "keepalive":
                    entry["seen"] = time.monotonic()
+                elif channel.label == "rrd" and isinstance(value, str) and len(value) < 80:
+                    try:
+                        ack = json.loads(value)
+                        sequence = ack.get("ack")
+                        if type(sequence) is int and entry["subscriber"] is not None:
+                            entry["subscriber"].acknowledge(sequence)
+                    except (ValueError, AttributeError):
+                        pass

            entry["tasks"].append(asyncio.create_task(self.deliver(identifier, channel)))

@@ -110,7 +126,7 @@ class NodeMediaPeers:
            await self.close(identifier)
            raise

-    async def send(self, channel, payload):
+    async def send(self, channel, payload, alive=None):
        if not 0 < len(payload) <= MAX_PAYLOAD:
            raise RuntimeError("Preview fragment exceeds bound")
        # Each binary_stream.read() is an independent RRD. SCTP messages are
@@ -118,9 +134,9 @@ class NodeMediaPeers:
        parts = (payload[offset:offset + FRAGMENT_BYTES]
                 for offset in range(0, len(payload), FRAGMENT_BYTES))
        for part in chain((b"MCF1" + len(payload).to_bytes(4, "big"),), parts):
-            deadline = time.monotonic() + 2
-            while channel.readyState != "open" or channel.bufferedAmount > 1024 * 1024:
-                if channel.readyState in {"closed", "closing"} or time.monotonic() > deadline:
+            while channel.readyState != "open" or channel.bufferedAmount > 256 * 1024:
+                if (channel.readyState in {"closed", "closing"}
+                        or (alive is not None and not alive())):
                    raise RuntimeError("Preview consumer unavailable")
                await asyncio.sleep(0.01)
            channel.send(part)
@@ -166,32 +182,58 @@ class NodeMediaPeers:
        try:
            entry = self.items[identifier]
            if channel.label == "rrd":
-                subscriber = await asyncio.to_thread(self.hub.subscribe)
+                # Admission only takes a short in-process lock. Keep it on this
+                # task so cancellation cannot orphan an attached subscription.
+                subscriber = self.hub.subscribe(entry["view_id"], entry["after"])
+                entry["subscriber"] = subscriber
            else:
                lease = await self.camera_delivery(identifier, channel)
                if lease is None:
                    return
-            while identifier in self.items and time.monotonic() - entry["seen"] < 30:
+            def alive():
+                return identifier in self.items and time.monotonic() - entry["seen"] < 30
+            while alive():
                if subscriber:
-                    payload = await asyncio.to_thread(subscriber.read)
+                    batch = subscriber.next_batch(wait=False)
+                    if batch is None:
+                        break
+                    if not batch:
+                        await asyncio.sleep(0.025)
+                        continue
+                    sequence, payload, frame = batch
+                    channel.send(json.dumps({"type": "rrd-batch", "sequence": sequence,
+                                             "lidar": subscriber.snapshot(frame)}))
                else:
                    try:
                        segment = await asyncio.to_thread(lease.segments.get, 0.5)
                    except queue.Empty:
                        continue
                    if segment is None:
-                        break
+                        self.camera.release_delivery(lease, client_closed=True)
+                        lease = None
+                        lease = await self.camera_delivery(identifier, channel)
+                        if lease is None:
+                            break
+                        continue
                    kind, payload = segment
                    if kind == "media":
                        self.camera.mark_streaming(lease)
                if payload is None:
                    break
                if payload:
-                    await self.send(channel, payload)
+                    await self.send(channel, payload, alive)
                    if subscriber:
-                        # Ordered after native bytes. Age is source arrival age,
-                        # not time spent replaying an encoded preview backlog.
-                        channel.send(json.dumps(subscriber.snapshot()))
+                        # One in-flight complete native batch. Network stalls
+                        # pause this disposable delivery; the recorder keeps running.
+                        while alive() and subscriber.pending is not None:
+                            await asyncio.sleep(0.01)
+        except PreviewResumeError:
+            if channel.readyState == "open":
+                channel.send(json.dumps({"type": "preview-unavailable", "code": "resume-expired"}))
+                # Let the receiver consume the terminal reason and close its peer.
+                deadline = time.monotonic() + 1
+                while channel.readyState == "open" and time.monotonic() < deadline:
+                    await asyncio.sleep(0.025)
        except asyncio.CancelledError:
            pass
        except Exception as error:
@@ -199,7 +241,7 @@ class NodeMediaPeers:
                           channel.label, type(error).__name__)
        finally:
            if subscriber:
-                subscriber.close()
+                subscriber.release()
            if lease:
                self.camera.release_delivery(lease, client_closed=True)
            if channel.label == "camera":
@@ -216,6 +258,14 @@ class NodeMediaPeers:
            with suppress(Exception):
                await entry["pc"].close()

+    async def release_view(self, view_id):
+        if not isinstance(view_id, str) or str(UUID(view_id)) != view_id:
+            raise ValueError("Invalid preview view identifier")
+        for identifier, entry in list(self.items.items()):
+            if entry["view_id"] == view_id:
+                await self.close(identifier)
+        self.hub.release_view(view_id)
+
    async def close_all(self):
        for identifier in list(self.items):
            await self.close(identifier)
@@ -1,8 +1,8 @@
 """Bounded live RRD publication for paired Node viewers, without a TCP listener.

-Every viewer receives a fresh native recording including StoreInfo/blueprint.
-Latest-value queues discard decoded preview frames before encoding; encoded
-RRD bytes are never dropped inside a stream. Slow viewers are closed instead.
+Each view owns one recording for the acquisition, including across peer recovery.
+Decoded frames coalesce before encoding; a bounded encoded outbox waits for the
+viewer. Only complete, acknowledged RRD batches leave that outbox.
 """

 import logging
@@ -17,13 +17,25 @@ from k1link.viewer.rerun_bridge import RerunBridge

 MAX_ENCODED_CHUNK = 8 * 1024 * 1024
 LIVE_FRAME_MAX_AGE_SECONDS = 2.0
+RESUME_GRACE_SECONDS = 300.0
 logger = logging.getLogger(__name__)
+_CURRENT_FRAME = object()
+
+
+class PreviewResumeError(ValueError):
+    """A view must be explicitly reopened; silently resetting history is forbidden."""


 class RrdSubscriber:
-    def __init__(self, settings_provider):
+    def __init__(self, settings_provider, path_provider=None):
        self.closed = threading.Event()
-        self.inputs = queue.Queue(maxsize=2)
+        self.inputs = {}
+        self.input_ready = threading.Condition()
+        self.delivery_lock = threading.Lock()
+        self.pending = None
+        self.batch_sequence = 0
+        self.detached_at = None
+        self.path_provider = path_provider
        self.output = queue.Queue(maxsize=2)
        self.settings_provider = settings_provider
        self.last_frame = None
@@ -33,22 +45,55 @@ class RrdSubscriber:
    def offer(self, envelope):
        if self.closed.is_set():
            return
-        with suppress(queue.Full):
-            if self.inputs.full():
-                with suppress(queue.Empty):
-                    self.inputs.get_nowait()
-            self.inputs.put_nowait(envelope)
+        with self.input_ready:
+            # Keep one latest envelope per modality: a pose burst must not
+            # starve PCL, and no network wait reaches the acquisition producer.
+            self.inputs[type(envelope)] = envelope
+            self.input_ready.notify()

-    def read(self):
+    def attach(self, after=0):
+        if self.closed.is_set() or not self.delivery_lock.acquire(blocking=False):
+            raise RuntimeError("Preview is closed or still attached")
+        if after != self.batch_sequence and not (
+                self.pending is not None and after == self.batch_sequence - 1):
+            self.delivery_lock.release()
+            raise PreviewResumeError("Preview cursor does not match recording")
+        self.acknowledge(after)
+        self.detached_at = None
+        return self
+
+    def release(self):
+        self.detached_at = time.monotonic()
+        self.delivery_lock.release()
+
+    def next_batch(self, *, wait=True):
+        if self.pending is None:
+            value = self._read(wait=wait)
+            if not value:
+                return value
+            self.batch_sequence += 1
+            self.pending = (self.batch_sequence, *value)
+        return self.pending
+
+    def acknowledge(self, sequence):
+        if self.pending is not None and sequence == self.pending[0]:
+            self.pending = None
+
+    def _read(self, *, wait=True):
        if self.closed.is_set():
            return None
        try:
-            return self.output.get(timeout=0.5)
+            return self.output.get(timeout=0.5) if wait else self.output.get_nowait()
        except queue.Empty:
            return b""

-    def snapshot(self):
-        frame = self.last_frame
+    def read(self):
+        # Kept for native sink inspection; media delivery uses acknowledged batches.
+        value = self._read()
+        return value[0] if value else value
+
+    def snapshot(self, frame=_CURRENT_FRAME):
+        frame = self.last_frame if frame is _CURRENT_FRAME else frame
        return {"type": "lidar-state", "sequence": frame[0] if frame else 0,
                "age_ms": max(0, (time.monotonic_ns() - frame[1]) / 1_000_000) if frame else None,
                "points": frame[2] if frame else 0}
@@ -66,7 +111,8 @@ class RrdSubscriber:
            return "webrtc+rrd://" + str(uuid4())

        try:
-            bridge = RerunBridge(settings_provider=self.settings_provider, recording_output=output)
+            bridge = PreviewRerunBridge(settings_provider=self.settings_provider,
+                                        recording_output=output, path_provider=self.path_provider)
            bridge.begin_session()
            while not self.closed.is_set():
                payload = binary.read()
@@ -75,13 +121,21 @@ class RrdSubscriber:
                if payload and len(payload) > MAX_ENCODED_CHUNK:
                    break
                if payload:
-                    # Bound both bytes and waiting time. The archive/producer
-                    # never waits for this disposable preview subscription.
-                    self.output.put(payload, timeout=0.5)
-                try:
-                    envelope = self.inputs.get(timeout=0.1)
-                except queue.Empty:
-                    continue
+                    # Backpressure is a pause, never EOF. At most two encoded
+                    # batches plus this one and the in-flight batch are retained.
+                    # Do not drop encoded bytes or restart a native recording.
+                    while not self.closed.is_set():
+                        try:
+                            self.output.put((payload, self.last_frame), timeout=0.1)
+                            break
+                        except queue.Full:
+                            continue
+                with self.input_ready:
+                    if not self.inputs:
+                        self.input_ready.wait(timeout=0.1)
+                    if not self.inputs:
+                        continue
+                    envelope = self.inputs.pop(next(iter(self.inputs)))
                received = envelope.context.received_monotonic_ns
                if (received is not None
                        and (time.monotonic_ns() - received) / 1_000_000_000
@@ -104,10 +158,28 @@ class RrdSubscriber:
                    binary.read()


+class PreviewRerunBridge(RerunBridge):
+    def __init__(self, *, path_provider=None, **kwargs):
+        self.path_provider = path_provider
+        super().__init__(**kwargs)
+
+    def _append_trajectory_pose(self, position, source_time_ns):
+        if self.path_provider is None:
+            return super()._append_trajectory_pose(position, source_time_ns)
+        # Route history belongs to the acquisition, including movement during
+        # preview congestion. The primary bridge already bounds its point count.
+        path = self.path_provider()
+        if self._path == path:
+            return False
+        self._path = path
+        return True
+
+
 class NodeRerunBridge(RerunBridge):
    def __init__(self, **kwargs):
        self.lock = threading.Lock()
        self.subscribers = []
+        self.views = {}
        self.latest = {}

        def output(recording):
@@ -124,6 +196,7 @@ class NodeRerunBridge(RerunBridge):
        self.binary.read()
        with self.lock:
            self.latest[type(envelope)] = (time.monotonic(), envelope)
+            self._expire_views()
            self.subscribers = [v for v in self.subscribers if not v.closed.is_set()]
            for subscriber in self.subscribers:
                subscriber.offer(envelope)
@@ -132,24 +205,48 @@ class NodeRerunBridge(RerunBridge):
        super().process_perception(frame)
        self.binary.read()

-    def subscribe(self):
+    def _expire_views(self):
+        for key, value in list(self.views.items()):
+            if (value.closed.is_set() or (value.detached_at is not None
+                    and time.monotonic() - value.detached_at > RESUME_GRACE_SECONDS)):
+                value.close()
+                del self.views[key]
+
+    def subscribe(self, view_id=None, after=0):
        with self.lock:
+            self._expire_views()
+            if self._closed:
+                raise RuntimeError("Live acquisition is not active")
+            if view_id in self.views:
+                return self.views[view_id].attach(after)
+            if after:
+                raise PreviewResumeError("Preview recording expired; reopen the view")
            self.subscribers = [v for v in self.subscribers if not v.closed.is_set()]
-            if self._closed or len(self.subscribers) >= 2:
-                raise RuntimeError("Live viewer unavailable")
-            subscriber = RrdSubscriber(self._settings_provider)
+            if len(self.subscribers) >= 2:
+                raise RuntimeError("Close another live viewer")
+            subscriber = RrdSubscriber(self._settings_provider, lambda: list(self._path))
            for observed, envelope in self.latest.values():
                if time.monotonic() - observed <= LIVE_FRAME_MAX_AGE_SECONDS:
                    subscriber.offer(envelope)
            self.subscribers.append(subscriber)
+            if view_id is not None:
+                self.views[view_id] = subscriber
+                subscriber.attach()
            return subscriber

+    def release_view(self, view_id):
+        with self.lock:
+            subscriber = self.views.pop(view_id, None)
+            if subscriber is not None:
+                subscriber.close()
+
    def close(self):
        with self.lock:
            for subscriber in self.subscribers:
                subscriber.close()
            self.subscribers.clear()
            self.latest.clear()
+            self.views.clear()
        super().close()
        self.binary.read()

@@ -163,8 +260,12 @@ class NodeRerunHub:
        self.bridge = bridge
        return bridge

-    def subscribe(self):
+    def subscribe(self, view_id=None, after=0):
        bridge = self.bridge
        if bridge is None:
            raise RuntimeError("Live acquisition is not active")
-        return bridge.subscribe()
+        return bridge.subscribe(view_id, after)
+
+    def release_view(self, view_id):
+        if self.bridge is not None:
+            self.bridge.release_view(view_id)
@@ -158,7 +158,7 @@ def test_private_release_contains_material_only_in_root_private_member(
        position += 60 + length + length % 2
    with tarfile.open(fileobj=io.BytesIO(members["control.tar.gz"]), mode="r:gz") as archive:
        control = archive.extractfile("control").read().decode()
-    assert "Depends: mission-core-node (>= 0.8.9)" in control
+    assert "Depends: mission-core-node (>= 0.8.10)" in control
    assert "Replaces: mission-core-node (<< 0.8.0)" in control


@@ -1,5 +1,6 @@
 import asyncio
 import queue
+from uuid import uuid4

 import pytest
 from aiortc import RTCConfiguration, RTCPeerConnection, RTCSessionDescription
@@ -36,7 +37,7 @@ def test_failed_media_offer_retires_peer_without_camera_channel(monkeypatch):
        peers = NodeMediaPeers(None, Camera())
        try:
            with pytest.raises(ValueError):
-                await peers.offer({"sdp": SDP_HEADER})
+                await peers.offer({"sdp": SDP_HEADER, "view_id": str(uuid4())})
            assert peers.items == {}
        finally:
            await peers.close_all()
@@ -50,23 +51,28 @@ def test_native_webrtc_roundtrip_and_missing_camera_preserve_rrd(monkeypatch):

    class Subscription:
        def __init__(self):
+            self.pending = None
            self.output = queue.Queue()
            self.output.put(payload)

-        def read(self):
+        def next_batch(self, *, wait=True):
            try:
-                return self.output.get(timeout=0.1)
+                self.pending = (1, self.output.get(timeout=0.1), None)
+                return self.pending
            except queue.Empty:
                return b""

-        def snapshot(self):
+        def snapshot(self, frame=None):
            return {"type": "lidar-state", "sequence": 1, "age_ms": 0, "points": 5000}

-        def close(self):
+        def acknowledge(self, sequence):
+            self.pending = None
+
+        def release(self):
            pass

    class Hub:
-        def subscribe(self):
+        def subscribe(self, view_id, after):
            return Subscription()

    class Camera:
@@ -98,11 +104,14 @@ def test_native_webrtc_roundtrip_and_missing_camera_preserve_rrd(monkeypatch):
                return
            payloads.append(data)
            if len(payloads) > 1 and sum(map(len, payloads[1:])) == len(payload):
+                channel.send('{"ack":1}')
                received.set()

        try:
            await client.setLocalDescription(await client.createOffer())
-            answer = await peers.offer({"sdp": client.localDescription.sdp})
+            answer = await peers.offer({
+                "sdp": client.localDescription.sdp, "view_id": str(uuid4()),
+            })
            await client.setRemoteDescription(
                RTCSessionDescription(sdp=answer["sdp"], type="answer")
            )
@@ -210,14 +219,23 @@ def test_native_rrd_idle_does_not_close_camera_or_peer(monkeypatch):
        video = client.createDataChannel("camera", ordered=True)
        ready, resumed, camera_frame = asyncio.Event(), asyncio.Event(), asyncio.Event()

+        batch_sequence, remaining = 0, 0
+
        @rrd.on("message")
        def rrd_message(data):
+            nonlocal batch_sequence, remaining
            if isinstance(data, str):
                value = json.loads(data)
-                if value["sequence"] == 1:
+                batch_sequence = value["sequence"]
+                if value["lidar"]["sequence"] == 1:
                    resumed.set()
+            elif data.startswith(b"MCF1") and remaining == 0:
+                remaining = int.from_bytes(data[4:], "big")
            else:
-                ready.set()
+                remaining -= len(data)
+                if remaining == 0:
+                    rrd.send(json.dumps({"ack": batch_sequence}))
+                    ready.set()

        @video.on("message")
        def camera_message(data):
@@ -226,7 +244,9 @@ def test_native_rrd_idle_does_not_close_camera_or_peer(monkeypatch):

        try:
            await client.setLocalDescription(await client.createOffer())
-            answer = await peers.offer({"sdp": client.localDescription.sdp})
+            answer = await peers.offer({
+                "sdp": client.localDescription.sdp, "view_id": str(uuid4()),
+            })
            await client.setRemoteDescription(
                RTCSessionDescription(sdp=answer["sdp"], type="answer")
            )
@@ -251,3 +271,33 @@ def test_native_rrd_idle_does_not_close_camera_or_peer(monkeypatch):
        assert not peers.items

    asyncio.run(run())
+
+
+def test_network_backpressure_longer_than_two_seconds_is_a_pause():
+    """Bounded synthetic scheduler pause; no sockets, scanner or load generation."""
+    import time
+
+    class Channel:
+        readyState = "open"
+        sent = []
+        blocked = True
+
+        @property
+        def bufferedAmount(self):
+            return 1024 * 1024 if self.blocked else 0
+
+        def send(self, value):
+            self.sent.append(value)
+
+    async def run():
+        channel = Channel()
+        peers = object.__new__(NodeMediaPeers)
+        task = asyncio.create_task(peers.send(channel, b"small-synthetic-payload", lambda: True))
+        started = time.monotonic()
+        await asyncio.sleep(2.1)
+        assert not task.done() and channel.sent == []
+        channel.blocked = False
+        await asyncio.wait_for(task, 1)
+        assert time.monotonic() - started >= 2
+        assert channel.sent == [b"MCF1\x00\x00\x00\x17", b"small-synthetic-payload"]
+    asyncio.run(run())
@@ -78,3 +78,63 @@ def test_reopened_viewer_does_not_replay_cached_points_after_source_pause(monkey
    finally:
        bridge.close()
        sub.thread.join(timeout=3)
+
+
+def test_slow_consumer_resumes_same_recording_and_replays_unacknowledged_batch():
+    """A >500ms delivery pause used to retire the recording and lose its route."""
+    bridge = NodeRerunBridge()
+    sub = bridge.subscribe("synthetic-view")
+    try:
+        batch = sub.next_batch()
+        assert batch and batch[1].startswith(b"RRF2")
+        sequence = batch[0]
+        # Produce several tiny frames without draining the bounded outbox.
+        for index in range(1, 8):
+            bridge.process(points(index))
+            time.sleep(0.12)
+        assert not sub.closed.is_set()
+        assert sub.output.qsize() <= 2
+        old_thread = sub.thread
+        sub.release()
+        resumed = bridge.subscribe("synthetic-view", sequence - 1)
+        assert resumed is sub and resumed.thread is old_thread
+        assert resumed.next_batch() == batch  # ACK lost: resend the exact RRD.
+        resumed.acknowledge(sequence)
+        following = resumed.next_batch()
+        assert following[0] == sequence + 1
+        resumed.release()
+        again = bridge.subscribe("synthetic-view", following[0])
+        assert again is sub and again.pending is None  # Delivered ACK lost at sender.
+        again.release()
+    finally:
+        bridge.close()
+        sub.thread.join(timeout=3)
+    assert not sub.thread.is_alive()
+
+
+def test_resumption_cannot_silently_replace_expired_recording():
+    import pytest
+    bridge = NodeRerunBridge()
+    try:
+        with pytest.raises(ValueError, match="expired"):
+            bridge.subscribe("missing-view", 2)
+        assert bridge.subscribers == []
+    finally:
+        bridge.close()
+
+
+def test_closing_view_releases_capacity_without_waiting_for_resume_grace():
+    bridge = NodeRerunBridge()
+    views = []
+    try:
+        for index in range(4):
+            sub = bridge.subscribe(f"view-{index}")
+            views.append(sub)
+            sub.release()
+            bridge.release_view(f"view-{index}")
+            assert sub.closed.is_set()
+        assert bridge.views == {}
+    finally:
+        bridge.close()
+        for sub in views:
+            sub.thread.join(timeout=3)