diff --git a/apps/studio/src/orisys_studio/app_window.py b/apps/studio/src/orisys_studio/app_window.py
index 636a76c..f5e3e92 100644
--- a/apps/studio/src/orisys_studio/app_window.py
+++ b/apps/studio/src/orisys_studio/app_window.py
@@ -21,7 +21,7 @@ from orisys_app_shared.acquisition.image_backend import (
     SOURCE_RECOMPUTE,
     SOURCE_REPLAY,
     ImageFrame,
-    render_image,  # re-exported: tests monkeypatch ``app_window.render_image``
+    render_image as render_image,  # re-exported: tests monkeypatch ``app_window.render_image``
 )
 from orisys_app_shared.force.calibration_recorder import CalibrationRecorder
 from orisys_app_shared.force.filters import FilterSettings
@@ -31,7 +31,7 @@ from orisys_app_shared.logging import report_error
 from orisys_app_shared.paths import logo_path, recordings_dir, sensor_json_path
 from orisys_app_shared.prefs import save_preferences
 from orisys_app_shared.record import RecordConfig
-from orisys_app_shared.theme import build_qss, clear_theme_cache, color
+from orisys_app_shared.theme import build_qss, clear_theme_cache
 from PySide6.QtCore import Qt, QTimer
 from PySide6.QtGui import QAction, QActionGroup, QIcon
 from PySide6.QtWidgets import (
@@ -54,13 +54,13 @@ from orisys_studio.replay import ReplayEngine
 from orisys_studio.replay_controller import ReplayController
 from orisys_studio.scene3d.prefs import settings_to_prefs
 from orisys_studio.session_controller import SessionController
-from orisys_studio.ui import record_status as record_states
+from orisys_studio.status_presenter import RailState, StatusPresenter
 from orisys_studio.ui.about_dialog import AboutDialog
 from orisys_studio.ui.analysis_progress import AnalysisProgress
 from orisys_studio.ui.arrow_panel import ArrowPanel, bgr_to_qimage
 from orisys_studio.ui.brand_bar import BrandBar
 from orisys_studio.ui.cal_panel import CalPanel
-from orisys_studio.ui.force_plots import CHANNEL_LABELS, ForcePlotsPanel
+from orisys_studio.ui.force_plots import ForcePlotsPanel
 from orisys_studio.ui.mesh3d_panel import Mesh3dPanel
 from orisys_studio.ui.finger_orientation_dialog import FingerOrientationDialog
 from orisys_studio.ui.plot_settings_dialog import (
@@ -250,6 +250,7 @@ class StudioMainWindow(QMainWindow):
         self.toolbar = ToolbarWidget(theme=self._theme)
         root.addWidget(self.toolbar)
         self.status_chip = self.toolbar.status_chip
+        self.status_presenter = StatusPresenter(self.toolbar)
         # Part B: the analysis pass a replay is served from. The surface sits directly
         # under the rail, so "what is it doing and can I stop it" is answered where the
         # transport is; it is hidden until a pass (or a cache hit) has something to say.
@@ -1431,184 +1432,54 @@ class StudioMainWindow(QMainWindow):
         self.statusBar().showMessage(message, int(ms))
 
     def _refresh_status_chip(self) -> None:
-        chip = getattr(self, "status_chip", None)
-        if chip is None:
-            return
-        # The session normalises the phase once, when it is set, so there is nothing
-        # to sanitise here: a second normalisation is a second rule to keep in step.
-        phase = self._session_phase
-        token = f"status_{phase}"
-        # One dot carries the colour; the text says what the state is, so the
-        # colour is never the only encoding.
-        chip.setText(f"● {t(f'status.phase_{phase}')}")
-        chip.setStyleSheet(
-            f"QLabel#statusChip {{ color: {color(self._theme, token)};"
-            " background: transparent; font-weight: 600; padding: 0 10px 0 4px; }"
-        )
+        self.status_presenter.refresh_phase(self.session.phase, theme=self._theme)
 
     # ------------------------------------------------------ status rail state
     def _refresh_status_rail(self) -> None:
-        """Sensor, source detail, calibration, validity, FPS and device identity.
-
-        The rail is the single place these facts are written; the bottom status
-        bar keeps only transient messages.
-        """
-        config = self.sensor_picker.config_name()
-        self.toolbar.set_sensor_summary(
-            t(
-                "sensor.summary",
-                type=self.sensor_picker.sensor_type().upper(),
-                config=Path(config).name if config else t("status.config_none"),
-            )
-        )
-        # The picker on the rail already names the camera, so the summary carries
-        # only what it cannot: the frame rate, and — **in the replay view only** —
-        # the video part being played. Naming the video in the live view was how a
-        # replay's file stayed on the rail after switching back to the camera.
-        detail = ""
+        result_type = ""
+        result_progress = None
         if self._view_preset == "replay":
-            path = self.toolbar.video_path()
-            if path:
-                key = (
-                    "status.rail_video_name"
-                    if self.replay.has_video()
-                    else "status.rail_recent_video"
-                )
-                detail = t(key, name=Path(path).name)
-            # Name the *result's* profile and whether it was reused or just finished, so
-            # changing the sensor picker cannot look like the open figures came from the
-            # newly selected product.
-            session = self.replay_ctl.available_result()
-            if session is not None:
-                provenance = getattr(getattr(session, "reader", None), "provenance", None)
+            result = self.replay_ctl.available_result()
+            if result is not None:
+                provenance = getattr(getattr(result, "reader", None), "provenance", None)
                 result_type = str(getattr(provenance, "sensor_type", "") or "").strip()
-                if result_type:
-                    result_label = t("status.rail_result_profile", type=result_type)
-                    detail = f"{result_label} · {detail}" if detail else result_label
-                progress = getattr(self.replay_ctl, "_progress", None)
-                progress_state = (
-                    str(progress.state()) if progress is not None and hasattr(progress, "state") else ""
-                )
-                if progress_state == "reused":
-                    status_text = t("status.rail_result_reused")
-                elif progress_state == "complete":
-                    status_text = t("status.rail_result_complete")
-                elif progress_state == "running":
-                    status_text = t("status.rail_result_running")
-                else:
-                    status_text = t("status.rail_result_ready")
-                detail = f"{detail} · {status_text}" if detail else status_text
-        if self._show_fps and self._latest_fps is not None:
-            fps = f"{self._latest_fps:.1f} FPS"
-            # The cost goes next to the rate because one without the other cannot
-            # be read: "16.7 FPS" is either a slow camera or a pipeline that
-            # cannot keep up, and only this number tells the two apart.
-            if self._latest_process_ms:
-                fps = f"{fps} · {self._latest_process_ms:.0f} ms"
-            # ...and the camera's own rate settles it: a capture rate well above
-            # what we consumed means the frames were there and we did not take
-            # them (the drop counter says how many).
-            if self._latest_capture_fps:
-                fps = f"{fps} · {t('status.rail_camera_fps', fps=f'{self._latest_capture_fps:.1f}')}"
-                if self._latest_capture_dropped:
-                    fps = f"{fps} (-{self._latest_capture_dropped})"
-            detail = f"{detail} · {fps}" if detail else fps
-        self.toolbar.set_source_summary(detail)
-        # The full path and the replay's notes do not fit on a 30 px rail, so
-        # they live in the summary's tooltip (the bar that used to show them is
-        # gone: the two views share one layout).
-        tip_parts = [detail, self.toolbar.video_path()]
-        if self._view_preset == "replay" and self.replay.has_video():
-            # Includes the "this is a video, not a recording" note for a bare video.
-            tip_parts.append(self.replay.warnings_text())
-        self.toolbar.set_source_summary_tip(
-            "\n".join(part for part in tip_parts if part)
-        )
-        self.toolbar.set_calibration_summary(self._calibration_summary())
-        if self._last_sample_valid is None:
-            self.toolbar.set_data_state("")
-        elif self._last_sample_valid:
-            self.toolbar.set_data_state(t("status.data_valid"), "success")
-        else:
-            self.toolbar.set_data_state(
-                t("status.data_invalid", count=self._record_error_count), "warning"
-            )
+                result_progress = str(self.analysis_progress.state())
+        self.status_presenter.refresh_rail(RailState(
+            sensor_type=self.sensor_picker.sensor_type(),
+            config_name=self.sensor_picker.config_name(),
+            view_preset=self._view_preset,
+            video_path=self.toolbar.video_path(),
+            has_video=self.replay.has_video(),
+            replay_warnings=(
+                self.replay.warnings_text()
+                if self._view_preset == "replay" and self.replay.has_video() else ""
+            ),
+            calibration_summary=self._calibration_summary(),
+            result_sensor_type=result_type,
+            result_progress=result_progress,
+            show_fps=self._show_fps,
+            fps=self.session.latest_fps,
+            process_ms=self.session.latest_process_ms,
+            capture_fps=self.session.latest_capture_fps,
+            capture_dropped=self.session.latest_capture_dropped,
+            sample_valid=self.session.last_sample_valid,
+            record_error_count=self.session.record_error_count,
+        ))
 
     def _calibration_summary(self) -> str:
-        """What the calibration state means for the three axes.
-
-        Before the first sample the only evidence is whether the device
-        confirmed a calibration version. Afterwards the display decision is the
-        evidence: an axis without a newton curve is an axis without calibration,
-        and the rail must not claim three calibrated axes for a one-axis device.
-        """
-        if self._last_display_fallback is None:
-            return (
-                t("status.calibrated")
-                if self._active_calibration_id
-                else t("status.uncalibrated")
-            )
-        if self._last_display_fallback or self._last_display_available is None:
-            return t("status.uncalibrated")
-        axes = self._last_display_available
-        if all(axes):
-            return t("status.calibrated_all")
-        names = [CHANNEL_LABELS[index] for index, ok in enumerate(axes) if ok]
-        if not names:
-            return t("status.uncalibrated")
-        return t("status.calibrated_axes", axes="+".join(names))
+        return self.status_presenter.calibration_summary(
+            self.recording.active_calibration,
+            self._last_display_fallback,
+            self._last_display_available,
+        )
 
     # ---------------------------------------------------------- record state
     def _record_stats(self):
-        """``(state, stats, directory)`` — the single read of the record channel.
-
-        Kept as one seam so a preview/demo driver can inject a record state
-        without touching the recorder or the writer thread.
-        """
-        recorder = self.recorder
-        raw_directory = getattr(recorder, "directory", None)
-        directory = Path(raw_directory).name if raw_directory else ""
-        if self.recording.is_recording:
-            return record_states.RECORDING, recorder.stats(), directory
-        if self.recording.report_pending:
-            return record_states.CLOSING, recorder.stats(), directory
-        report = self._record_last_report
-        if report is not None:
-            stats = report.stats
-            state = (
-                record_states.ERROR
-                if (stats.failed or stats.write_errors)
-                else record_states.DONE
-            )
-            return state, stats, directory
-        return record_states.IDLE, None, directory
+        """Keep the snapshot injection seam used by UI checks and demo screenshots."""
+        return self.status_presenter.record_stats(self.recording)
 
     def _refresh_record_state(self) -> None:
-        """Push the recording's live numbers (duration, drops, write errors)."""
-        state, stats, directory = self._record_stats()
-        if stats is None:
-            self.toolbar.set_record_state(state, directory=directory)
-            return
-        self.toolbar.set_record_state(
-            state,
-            duration_s=stats.duration_s,
-            frames=stats.frames,
-            segments=stats.segments,
-            # An unrecorded gap is a lost row too: reporting only the two
-            # queue-overflow counters would understate the loss.
-            dropped=(
-                stats.dropped_data
-                + stats.dropped_video
-                + stats.dropped_gaps
-                + stats.unrecorded_gaps
-            ),
-            dropped_data=stats.dropped_data,
-            dropped_video=stats.dropped_video,
-            dropped_gaps=stats.dropped_gaps + stats.unrecorded_gaps,
-            errors=stats.write_errors,
-            detail=stats.last_error,
-            directory=directory,
-        )
+        self.status_presenter.refresh_record(*self._record_stats())
 
     # ------------------------------------------------------------------ nav
     def _set_theme(self, theme: str) -> None:
diff --git a/apps/studio/src/orisys_studio/status_presenter.py b/apps/studio/src/orisys_studio/status_presenter.py
new file mode 100644
index 0000000..ad1c1eb
--- /dev/null
+++ b/apps/studio/src/orisys_studio/status_presenter.py
@@ -0,0 +1,189 @@
+"""Render shell status from read-only facts on the GUI thread.
+
+The presenter holds only the toolbar. It neither owns session state nor calls
+back into the main window; a rail snapshot is discarded after each refresh.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from pathlib import Path
+from typing import TYPE_CHECKING
+
+from orisys_app_shared.i18n import t
+from orisys_app_shared.theme import color
+
+from orisys_studio.ui import record_status as record_states
+from orisys_studio.ui.force_plots import CHANNEL_LABELS
+
+if TYPE_CHECKING:
+    from orisys_app_shared.record import RecordStats
+
+    from orisys_studio.recording import RecordingCoordinator
+    from orisys_studio.ui.toolbar import ToolbarWidget
+
+
+@dataclass(frozen=True)
+class RailState:
+    """One GUI-thread read of the facts needed to paint the status rail."""
+
+    sensor_type: str
+    config_name: str
+    view_preset: str
+    video_path: str
+    has_video: bool
+    replay_warnings: str
+    calibration_summary: str
+    result_sensor_type: str = ""
+    #: None means no result; an empty string means a result with no progress state.
+    result_progress: str | None = None
+    show_fps: bool = False
+    fps: float | None = None
+    process_ms: float | None = None
+    capture_fps: float = 0.0
+    capture_dropped: int = 0
+    sample_valid: bool | None = None
+    record_error_count: int = 0
+
+
+class StatusPresenter:
+    """Paint status without changing the acquisition or recording lifecycle."""
+
+    def __init__(self, toolbar: ToolbarWidget) -> None:
+        self._toolbar = toolbar
+
+    def refresh_phase(self, phase: str, *, theme: str) -> None:
+        # The session normalises phase; colour is never the only encoding.
+        chip = self._toolbar.status_chip
+        chip.setText(f"● {t(f'status.phase_{phase}')}")
+        token = f"status_{phase}"
+        chip.setStyleSheet(
+            f"QLabel#statusChip {{ color: {color(theme, token)};"
+            " background: transparent; font-weight: 600; padding: 0 10px 0 4px; }"
+        )
+
+    def refresh_rail(self, state: RailState) -> None:
+        toolbar = self._toolbar
+        toolbar.set_sensor_summary(
+            t(
+                "sensor.summary",
+                type=state.sensor_type.upper(),
+                config=Path(state.config_name).name
+                if state.config_name
+                else t("status.config_none"),
+            )
+        )
+        detail = ""
+        if state.view_preset == "replay":
+            if state.video_path:
+                key = (
+                    "status.rail_video_name"
+                    if state.has_video
+                    else "status.rail_recent_video"
+                )
+                detail = t(key, name=Path(state.video_path).name)
+            # The displayed result keeps its own identity after a picker change.
+            if state.result_progress is not None:
+                if state.result_sensor_type:
+                    label = t(
+                        "status.rail_result_profile", type=state.result_sensor_type
+                    )
+                    detail = f"{label} · {detail}" if detail else label
+                if state.result_progress == "reused":
+                    status_text = t("status.rail_result_reused")
+                elif state.result_progress == "complete":
+                    status_text = t("status.rail_result_complete")
+                elif state.result_progress == "running":
+                    status_text = t("status.rail_result_running")
+                else:
+                    status_text = t("status.rail_result_ready")
+                detail = f"{detail} · {status_text}" if detail else status_text
+        if state.show_fps and state.fps is not None:
+            fps = f"{state.fps:.1f} FPS"
+            # Processing cost and capture rate distinguish a slow chain from a slow camera.
+            if state.process_ms:
+                fps = f"{fps} · {state.process_ms:.0f} ms"
+            if state.capture_fps:
+                fps = f"{fps} · {t('status.rail_camera_fps', fps=f'{state.capture_fps:.1f}')}"
+                if state.capture_dropped:
+                    fps = f"{fps} (-{state.capture_dropped})"
+            detail = f"{detail} · {fps}" if detail else fps
+        toolbar.set_source_summary(detail)
+        tip_parts = [detail, state.video_path]
+        if state.view_preset == "replay" and state.has_video:
+            tip_parts.append(state.replay_warnings)
+        toolbar.set_source_summary_tip("\n".join(part for part in tip_parts if part))
+        toolbar.set_calibration_summary(state.calibration_summary)
+        if state.sample_valid is None:
+            toolbar.set_data_state("")
+        elif state.sample_valid:
+            toolbar.set_data_state(t("status.data_valid"), "success")
+        else:
+            toolbar.set_data_state(
+                t("status.data_invalid", count=state.record_error_count), "warning"
+            )
+
+    @staticmethod
+    def calibration_summary(
+        active_id: str,
+        fallback: bool | None,
+        available: tuple[bool, bool, bool] | None,
+    ) -> str:
+        """Confirmed identity is evidence until the first per-axis display decision."""
+        if fallback is None:
+            return t("status.calibrated") if active_id else t("status.uncalibrated")
+        if fallback or available is None:
+            return t("status.uncalibrated")
+        if all(available):
+            return t("status.calibrated_all")
+        names = [CHANNEL_LABELS[index] for index, ok in enumerate(available) if ok]
+        if not names:
+            return t("status.uncalibrated")
+        return t("status.calibrated_axes", axes="+".join(names))
+
+    @staticmethod
+    def record_stats(
+        recording: RecordingCoordinator,
+    ) -> tuple[str, RecordStats | None, str]:
+        """Read live stats while closing; the final report is authoritative afterwards."""
+        recorder = recording.recorder
+        raw_directory = getattr(recorder, "directory", None)
+        directory = Path(raw_directory).name if raw_directory else ""
+        if recording.is_recording:
+            return record_states.RECORDING, recorder.stats(), directory
+        if recording.report_pending:
+            return record_states.CLOSING, recorder.stats(), directory
+        report = recording.last_report
+        if report is not None:
+            stats = report.stats
+            state = (
+                record_states.ERROR
+                if (stats.failed or stats.write_errors)
+                else record_states.DONE
+            )
+            return state, stats, directory
+        return record_states.IDLE, None, directory
+
+    def refresh_record(
+        self, state: str, stats: RecordStats | None, directory: str
+    ) -> None:
+        if stats is None:
+            self._toolbar.set_record_state(state, directory=directory)
+            return
+        self._toolbar.set_record_state(
+            state,
+            duration_s=stats.duration_s,
+            frames=stats.frames,
+            segments=stats.segments,
+            # A gap that could not be recorded is also a lost row.
+            dropped=stats.dropped_data
+            + stats.dropped_video
+            + stats.dropped_gaps
+            + stats.unrecorded_gaps,
+            dropped_data=stats.dropped_data,
+            dropped_video=stats.dropped_video,
+            dropped_gaps=stats.dropped_gaps + stats.unrecorded_gaps,
+            errors=stats.write_errors,
+            detail=stats.last_error,
+            directory=directory,
+        )
diff --git a/apps/studio/tests/test_status_presenter.py b/apps/studio/tests/test_status_presenter.py
new file mode 100644
index 0000000..92163e2
--- /dev/null
+++ b/apps/studio/tests/test_status_presenter.py
@@ -0,0 +1,172 @@
+"""Status presentation without a main window or running acquisition."""
+
+from dataclasses import replace
+from types import SimpleNamespace
+
+import pytest
+from orisys_app_shared.i18n import t
+from orisys_app_shared.record.experiment import RecordStats
+
+from orisys_studio.status_presenter import RailState, StatusPresenter
+from orisys_studio.ui.toolbar import ToolbarWidget
+
+
+@pytest.fixture
+def surface(qt_app):
+    toolbar = ToolbarWidget(theme="dark")
+    yield toolbar, StatusPresenter(toolbar)
+    toolbar.close()
+    toolbar.deleteLater()
+
+
+def rail(**changes):
+    return replace(
+        RailState(
+            sensor_type="finger",
+            config_name="finger/r01/sensor.json",
+            view_preset="live",
+            video_path="D:/clips/box.mp4",
+            has_video=True,
+            replay_warnings="video warning",
+            calibration_summary="calibration",
+        ),
+        **changes,
+    )
+
+
+def test_live_summary_keeps_video_details_out_and_reports_capture_cost(surface):
+    toolbar, presenter = surface
+    state = rail(
+        show_fps=True,
+        fps=16.67,
+        process_ms=58.4,
+        capture_fps=30.0,
+        capture_dropped=7,
+    )
+    presenter.refresh_rail(state)
+    text = toolbar.source_summary.text()
+    assert "box.mp4" not in text
+    assert "video warning" not in toolbar.source_summary.toolTip()
+    assert "16.7 FPS" in text and "58 ms" in text
+    assert "30.0" in text and "(-7)" in text
+    assert state.view_preset == "live"
+
+
+@pytest.mark.parametrize(
+    "loaded,key",
+    [
+        (True, "status.rail_video_name"),
+        (False, "status.rail_recent_video"),
+    ],
+)
+def test_replay_distinguishes_open_video_from_remembered_path(surface, loaded, key):
+    toolbar, presenter = surface
+    presenter.refresh_rail(rail(view_preset="replay", has_video=loaded))
+    assert toolbar.source_summary.text() == t(key, name="box.mp4")
+    assert ("video warning" in toolbar.source_summary.toolTip()) is loaded
+
+
+@pytest.mark.parametrize(
+    "progress,key",
+    [
+        ("reused", "status.rail_result_reused"),
+        ("complete", "status.rail_result_complete"),
+        ("running", "status.rail_result_running"),
+        ("", "status.rail_result_ready"),
+    ],
+)
+def test_result_identity_belongs_to_the_result_not_the_picker(surface, progress, key):
+    toolbar, presenter = surface
+    presenter.refresh_rail(
+        rail(
+            view_preset="replay",
+            result_sensor_type="box",
+            result_progress=progress,
+        )
+    )
+    text = toolbar.source_summary.text()
+    assert text.startswith(t("status.rail_result_profile", type="box"))
+    assert text.endswith(t(key))
+    assert "FINGER" in toolbar.btn_sensor.text()
+
+
+@pytest.mark.parametrize(
+    "version,fallback,axes,key,labels",
+    [
+        ("", None, None, "status.uncalibrated", ""),
+        ("confirmed", None, None, "status.calibrated", ""),
+        ("confirmed", True, (True, True, True), "status.uncalibrated", ""),
+        ("confirmed", False, None, "status.uncalibrated", ""),
+        ("confirmed", False, (False, False, False), "status.uncalibrated", ""),
+        ("confirmed", False, (True, True, True), "status.calibrated_all", ""),
+        ("confirmed", False, (True, False, True), "status.calibrated_axes", "FN+FY"),
+    ],
+)
+def test_calibration_summary_preserves_unknown_raw_and_partial_axes(
+    version,
+    fallback,
+    axes,
+    key,
+    labels,
+):
+    assert StatusPresenter.calibration_summary(version, fallback, axes) == t(
+        key, axes=labels
+    )
+
+
+def test_phase_repaints_after_a_theme_change_without_changing_the_phase(surface):
+    toolbar, presenter = surface
+    presenter.refresh_phase("connecting", theme="dark")
+    assert toolbar.status_chip.text() == f"● {t('status.phase_connecting')}"
+    presenter.refresh_phase("connecting", theme="light")
+    assert toolbar.status_chip.text() == f"● {t('status.phase_connecting')}"
+
+
+def test_record_close_and_all_gap_counts_remain_visible(surface):
+    toolbar, presenter = surface
+    stats = RecordStats(
+        frames=12,
+        duration_s=2.5,
+        dropped_data=1,
+        dropped_video=2,
+        dropped_gaps=3,
+        unrecorded_gaps=4,
+        write_errors=1,
+        last_error="disk full",
+    )
+    recording = SimpleNamespace(
+        recorder=SimpleNamespace(directory="D:/recordings/run", stats=lambda: stats),
+        is_recording=False,
+        report_pending=True,
+        last_report=SimpleNamespace(stats=RecordStats()),
+    )
+    snapshot = presenter.record_stats(recording)
+    assert snapshot == ("closing", stats, "run")
+    presenter.refresh_record(*snapshot)
+    displayed = toolbar.record_chip.stats()
+    assert displayed["state"] == "closing"
+    assert displayed["dropped"] == 10
+    assert displayed["dropped_gaps"] == 7
+    assert displayed["errors"] == 1
+
+
+@pytest.mark.parametrize(
+    "failed,errors,expected",
+    [
+        (False, 0, "done"),
+        (True, 0, "error"),
+        (False, 1, "error"),
+    ],
+)
+def test_finished_recording_uses_the_final_report(surface, failed, errors, expected):
+    toolbar, presenter = surface
+    stats = RecordStats(failed=failed, write_errors=errors)
+    recording = SimpleNamespace(
+        recorder=SimpleNamespace(directory=None),
+        is_recording=False,
+        report_pending=False,
+        last_report=SimpleNamespace(stats=stats),
+    )
+    assert presenter.record_stats(recording) == (expected, stats, "")
+    presenter.refresh_record(expected, stats, "")
+    assert toolbar.record_chip.state() == expected
diff --git a/docs/architecture/studio-architecture.md b/docs/architecture/studio-architecture.md
index a7d6054..7d0cafc 100644
--- a/docs/architecture/studio-architecture.md
+++ b/docs/architecture/studio-architecture.md
@@ -1,25 +1,50 @@
-# Studio 软件架构（测量版）
+# Studio 软件架构
 
-本文不是"理想架构"，而是**当前代码的真实依赖结构**：所有框图、数字与结论都由下面的脚本从源码里扫出来，
-每条判断后面都跟着它的证据。配套的矢量图是 `studio-architecture.svg`（浏览器直接打开）。
+本文的当前职责说明对应 2026-10-18 主窗口重构 S1；后续工作和验收由
+[分步重构计划](studio-window-refactor-plan.zh.md) 维护。下方旧扫描图表保留为历史证据，
+不能用其中的行数或“已完成”判断当前代码。
 
-生成方式（可复现，改完代码重跑即可）：
+## 当前职责与数据流
 
-> **脚本已不在工作区。** 下面两条命令指向 `D:\orisys_ws\.repro\` 下的一次性扫描脚本，该目录已清理
-> （2026-09-27 工作区整理），扫描脚本本身没有保留。**本文的框图与数字仍然有效** —— 矢量图
-> `studio-architecture.svg` 和 `studio-architecture.png` 已入库，是本文配套的、保留至今的产物。
-> 如需重跑，按下面的 `PYTHONPATH` 与两条命令的口径重写等价脚本即可；结论口径见下方"统计口径"。
+`app_window.py::StudioMainWindow` 创建控件和控制器并连接信号；本次从 3,181 行减至
+3,052 行。它仍承担菜单、预览、标定交互、分析配置和运行协调，尚未完成薄窗口目标。
 
-```powershell
-$env:PYTHONPATH = 'D:\orisys_ws\orisys-app\shared\src;D:\orisys_ws\orisys-app\apps\studio\src'
-& $py D:\orisys_ws\.repro\studio_arch_scan.py       # 模块清单、包级依赖、环、Qt/GL/SDK 归属 ← 脚本已删除
-& $py D:\orisys_ws\.repro\studio_arch_imports.py    # 哪些模块在 import 时就拉进 Qt/GL/SDK，哪些是惰性 ← 脚本已删除
+`status_presenter.py::StatusPresenter` 只持有工具栏，不持有窗口或会话控制器。
+窗口在 GUI 线程收集一次性的 `RailState`，Presenter 负责 phase、来源、标定、有效性及
+录制统计的文字和控件更新。快照不缓存、不反写状态；主题和语言刷新沿用原入口。
+分析结果的传感器身份来自结果 provenance，进度读取现有 `AnalysisProgress.state()`，
+不再通过 `ReplayController._progress` 访问其私有控件。
+
+```mermaid
+graph TD
+    W[StudioMainWindow 装配与接线] --> S[SessionController 会话与遥测]
+    W --> R[ReplayController 回放与分析执行]
+    W --> L[ViewLayoutController 布局]
+    W --> D[DisplayPrefsController 显示偏好]
+    W --> C[RecordingCoordinator 记录与设备确认]
+    W --> P[StatusPresenter 状态显示]
+    F[RailState 只读显示事实] --> P
+    P --> T[ToolbarWidget 状态轨]
+    W --> A[AcquirePresenter 实时呈现]
+    W --> V[FrameView 二维与共享深度范围]
 ```
 
-统计口径：行数含空行；`fan-in` = 有多少模块 import 它；`fan-out` = 它 import 了多少模块（同一模块多次
-import 只算一条边）。
+会话状态仍属于 `SessionController`，录制状态仍属于 `RecordingCoordinator`。
+`_record_stats` 保留为 UI 检查和截图的注入入口，实际状态选择及显示已委托 Presenter。
+关闭中的录制继续读取实时统计，完成后读取最终报告；丢失计数包括未能记下的 gap。
+设备确认与录制仍走采集线程通道；本次未改变定时器、停止等待或 3D 懒加载。
 
----
+验证入口：`test_status_presenter.py` 可在没有主窗口和设备的情况下检查状态显示；
+`test_ui_smoke.py`、`test_replay_wiring.py` 和 `tools/ui_check.py` 覆盖窗口集成。
+执行结果、环境及尚未验证范围记录在实施计划。状态转发暂留用于现有调用方，后续按职责迁移，
+不增加新的全局状态容器或将剩余逻辑全部并入回放控制器。
+
+## 历史测量的适用范围
+
+以下第 1–6 节及配套 `studio-architecture.svg`、`studio-architecture.png` 是旧扫描快照。
+原扫描的对应 revision 与完整运行输入不可用，生成脚本已于 2026-09-27 清理，无法原样复跑。
+数字口径为含空行行数；fan-in/out 为模块导入关系。旧测试计数、无环结论和完成状态均未在本次
+重新全量测量，不是当前保证；后续重构顺序以实施计划为准。
 
 ## 1. 分层视图（真实依赖方向）
 
@@ -289,35 +314,24 @@ graph TB
 7. **验证面 > 生产面**：19.7k 行测试/工具 vs 14.7k 行 studio 生产代码。好处是回归门硬；代价是每次改接口
    的成本被放大，尤其是 `ui_check` 里的字符串/布局断言（拆 `app_window` 时为保住这套门而留的转发，就是这个代价）。
 
-### 一句话结论
+### 历史评估结论
 
 **组织是合理的、容易维护的**（无环、分层单向、共享层无 Qt、危险知识集中在有测试的地方）。
 原来唯一的明确单点 `app_window.py` 已按职责拆成
 `session_controller` / `replay_controller` / `view_layout` / `display_prefs` + 标定服务，
 窗口退回装配与转发；每个新模块都有自己的公开接口单测（会话元数据 15 + 四个控制器 37 +
 标定服务 4 = 56 项），且在不需要窗口的情况下可测。
-下一步的性价比最高项因此换成了下面第 2 条（把"现在对"变成"以后不会错"）与第 5 条
-（最脆的资产 `ui_check.py` 现在是 3401 行单文件）。
+这是旧扫描时的评估结论；当前仍有窗口职责待迁移，实施顺序见下节链接。
 
-## 7. 建议（按性价比排序）
+## 后续迁移
 
-| # | 建议 | 收益 | 成本/风险 | 回归门 |
-|---|---|---|---|---|
-| 1 | ~~**拆 `app_window`**~~ **已完成**（会话 → `session_controller`、回放 → `replay_controller`、布局 → `view_layout`、显示偏好 → `display_prefs`、标定规则 → `calibration_service`；窗口 3044 → 2309 行） | 改动热点从 1 个 3000 行文件变成 5 个 200–650 行文件 + 一个装配器；每个控制器可脱离窗口单测（新增 41 项） | ~~中~~（已付：纯搬运 + 一层转发，未改行为） | `test_ui_smoke`/`test_scene3d_view`/`ui_check` 全绿；`git diff` 只应有移动与转发 |
-| 1b | **删掉过渡转发**：窗口里那约 40 个 `self._x` 转发是给 tests/`ui_check` 用的桥，下一次改动落在哪个控制器，就顺手把该控制器的转发与测试调用点改成 `self.<controller>.*` | 窗口真正退到"只有装配"；转发留着会慢慢变成新的隐式耦合 | 小-中（每次改动顺带；一次性清理会大面积改测试） | 全套 + `ui_check` |
-| 2 | **给共享层加"依赖规则测试"**：AST 扫描断言 `shared` 不得 eager import PySide6/OpenGL（现状成立），以及 `studio.scene3d` 不得 import `acquisition`；把 `force → orisys` 的现状登记为"已知例外"或改为惰性 —— *部分已完成*：`apps/studio/tests/test_studio_binding_purity.py` 与 `apps/autocal/tests/test_binding_purity.py` 已经强制"只允许 PySide6"（含无作用域枚举的检查，且用真 binding 内省而不是手写枚举名单）；`studio.scene3d` 与 `force → orisys` 两条仍未加 | 把"现在对"变成"以后不会错"；顺手暴露第 4 条风险 | 小（一个测试文件，用现成扫描脚本改） | 新测试 + 现有套件 |
-| 3 | **消歧命名**：`scene3d/panel.py` → `scene3d/controls.py`；`ui/mesh3d_panel.py` → `ui/scene3d_host.py`；`scene3d/replay` 与 `record/playback` 在 docstring 里互相指路 | 新人少走 3 次错门 | 小（改名 + import 更新），但会触及 ui_check 的引用 | 全套 + `ui_check` |
-| 4 | **把 `force → SDK` 改为惰性**（`calibration_io` 里改成函数内 import，或把 SDK 相关函数拆出去） | 力曲线的纯计算（history/filters/scale）可在无 SDK 环境测试 | 中（要区分哪些函数真的需要 SDK） | 现有力测试 + 无 SDK 的 import 检查 |
-| 5 | **`ui_check` 拆模块**（按场景拆 `tools/ui_checks/*.py`，保留单一入口与退出码） | 最脆的资产变成可分工、可 diff 的几块 | 中（3401 行搬运，语义不变） | 检查项计数不变（587 项 0 失败） |
-| 6 | **测试私有访问清单化**：把所有 `obj._x` 访问集中到 `tests/support/` 一层小适配器（拆 `app_window` 时保留的转发就是为了不一次性打碎它们） | 内部重构不再一次性打碎几十个测试 | 小-中 | 全套 |
-| 7 | **补上真机与 ARM 的验收**（本机无设备、无板卡）：清零/标定确认、`VRAW` 链失败后的状态、2 小时 GUI 长时、Jetson Orin Nano / QCS6490 报告 | 把"代码上成立"变成"设备上成立"——这是当前最大的空白 | 中（要设备与板卡） | 阶段 9 的验收清单 |
-
-不建议做的事：**不要**为了"看起来分层漂亮"把 `scene3d` 从 studio 搬进 shared（第 3 条第 5 项理由不硬，
-但现在搬动没有收益，反而打断三维子系统已经稳定的接口）；也**不要**为了统一而重写 `ui_check`。
+当前工作由 [分步重构计划](studio-window-refactor-plan.zh.md) 的 S2–S6 管理，
+包括界面构建、标定交互、分析配置、运行与预览以及显示入口和兼容桥收尾。
+每一步完成后更新本节之前的当前职责；历史指标不随搬运代码自动改写。
 
 ---
 
-_本文与图由源码扫描生成；扫描脚本 `.repro/studio_arch_scan.py`、`.repro/studio_arch_imports.py`
+_以上历史快照与图由源码扫描生成；扫描脚本 `.repro/studio_arch_scan.py`、`.repro/studio_arch_imports.py`
 与图表脚本 `.repro/make_studio_svg.py` → `.repro/svg_to_png.py`、原始数据 `.repro/studio_arch.json`、
 `.repro/studio_arch_imports.json` **均已在 2026-09-27 的工作区整理中删除**，未迁移。保留下来的是
 `.repro/` 之外的本文与图本身（`studio-architecture.svg`、`studio-architecture.png`）。
diff --git a/docs/architecture/studio-window-refactor-plan.zh.md b/docs/architecture/studio-window-refactor-plan.zh.md
new file mode 100644
index 0000000..d568a21
--- /dev/null
+++ b/docs/architecture/studio-window-refactor-plan.zh.md
@@ -0,0 +1,131 @@
+# Studio 主窗口分步重构计划
+
+目的：plan。范围：`apps/studio/src/orisys_studio/app_window.py` 及其直接调用方。
+当前架构由 [Studio 架构](studio-architecture.md) 维护；本文件是唯一实施进度记录。
+
+## 目标与约束
+
+主窗口保留组件装配、跨功能信号连接、窗口几何及明确的关闭顺序。
+按职责迁移现有实现，不增加产品功能、依赖、线程或全局状态容器。
+会话、回放、布局、显示偏好和记录状态继续由现有控制器持有。
+显示层只读取状态；录制与标定采样继续消费采集线程的数据，不依赖刷新频率。
+
+启动、停止、暂停、异常处理、信号顺序及懒加载时机均属于行为保持边界。
+关闭时保留预览关闭、采集回调解绑、分析取消与等待、采集和录制收尾、3D 释放的顺序。
+测试和工具确实使用的旧入口可以暂留，但每一步必须说明保留原因并更新真实调用方。
+不提交、不切换分支；排除已有 Autocal、测试修复文档及工作区归档修改。
+
+## 顺序与验收
+
+每步都先检查调用方及相关测试，完成后更新本计划和架构文档。
+任务顺序为 S0 → S1 → S2 → S3 → S4 → S5 → S6；每一步均可独立审查。
+
+### S0：基线与计划
+
+- [x] 记录 HEAD、索引和已有修改，建立独立 scratch 证据目录。
+- [x] 在改动前运行状态显示与主窗口相关测试。
+
+基线：2026-10-18，`orisys-app` 的 `main`，HEAD `433b76e`。
+源码为 3,181 行；`StudioMainWindow` 有 212 个方法，含属性访问器。
+原架构文档的 2,309 行及“拆分已完成”属于历史状态。
+
+### S1：状态显示
+
+- [x] 新建 `status_presenter.py`，接收显示事实与目标控件，不接收整个窗口。
+- [x] 迁移 phase、来源摘要、标定摘要、有效性及录制统计的格式化与显示。
+- [x] 保留 `_record_stats` 注入入口，保证已有截图工具和 UI 检查仍有效。
+
+涉及主窗口、新 Presenter 和定向测试。验收：实时视图不显示回放标题；分析结果保持自己的
+传感器身份；未知、无标定、部分轴标定仍可区分；录制关闭中不显示完成，丢失计数完整。
+验证：状态 Presenter 独立测试、`test_ui_smoke`、`test_replay_wiring` 和现有 UI 检查。
+
+### S2：界面构建
+
+- [ ] 提取 `ui/window_ui.py` 的控件和布局构建，保持控件身份、顺序及 parent。
+- [ ] 单独迁移菜单和 QAction 创建；由窗口显式连接功能操作。
+- [ ] 迁移对应文字与主题更新，保留必要属性兼容入口。
+
+依赖 S1。涉及主窗口、UI 模块及实际调用方；面板构建和菜单构建分两批验收。
+验证：`test_ui_elements`、`test_view_layout`、`test_sensor_switch_window`、主题与语言检查。
+3D 仍在原时机创建，启动恢复顺序及保存的布局不变。
+
+### S3：实时标定交互
+
+- [ ] 提取 `live_calibration.py` 的选择保存、解析、确认及提交请求。
+- [ ] 文件身份和匹配规则复用 `CalibrationService`；对话框通过窄接口访问。
+- [ ] 设备确认、记录版本及采样仍走现有记录通道。
+
+依赖 S2。验证：`test_live_calibration_dialog`、`test_calibration_service` 及确认事件测试。
+导出不等于应用，应用请求不等于设备确认，序列号不匹配的处理不变。
+
+### S4：分析配置
+
+- [ ] 提取 `analysis_setup.py` 的对话框、裸视频工作目录和分析服务构造。
+- [ ] 迁移 reference override 的所有权，保持现有保存和取消语义。
+- [ ] `ReplayController` 继续负责执行、取消、缓存及结果选择，不吸收配置逻辑。
+
+依赖 S3 的标定选择接口。验证：`test_bare_video_analysis`、`test_analysis_progress`、
+`test_replay_wiring`；历史录制仍使用自身 chain，取消配置不改变当前结果。
+
+### S5：运行协调与预览
+
+- [ ] 先提取 `preview_controller.py`，负责设备和预览定时器生命周期。
+- [ ] 再提取 `activity_coordinator.py`，统一按钮和快捷键的运行、暂停、停止规则。
+- [ ] worker 操作通过 `SessionController`；关闭流程继续在窗口显式排列。
+
+依赖 S4。两批分别验证 `test_session_controller`、`test_pause_controls`、
+`test_transport_review` 和连接中停止、断开、异常、重复关闭场景。
+普通停止保持非阻塞，退出等待资源结束；预览与采集不能争用相机。
+
+### S6：显示入口与兼容桥收尾
+
+- [ ] 将 2D/3D 的共同交付协调归入现有 `FrameView`，调用方显式传入显示上下文。
+- [ ] 更新测试和工具为真实控制器接口，删除已无调用方的窗口转发。
+- [ ] 核对依赖方向、无循环、线程归属和文档现状；运行完整门禁。
+
+依赖 S5。验证：`test_shared_depth_scale`、`test_scene3d_frame_views`、回放定位与
+显示设置重绘测试。2D/3D 使用同一帧；实时不覆盖回放；重绘不启动新分析。
+结束条件是主窗口只承担约定职责，且所有相关检查通过，不以行数作为唯一标准。
+
+## 验证与当前进度
+
+解释器使用 `.venv-build/Scripts/python.exe`。定向 pytest 显式使用独立的
+`--basetemp` 和 `-p no:cacheprovider`；日志位于 `.scratch/studio-window-refactor/`。
+每个迁移步骤运行对应检查；可交付批次运行 `tools/gate.ps1 -Task studio-window-refactor`。
+文档使用工作区 `scripts/doc_lint.py` 和 `scripts/doc_count.py`，不扩大基线。
+
+2026-10-18：S0 和 S1 已实施。改动前后同一组 `test_ui_smoke` 与
+`test_replay_wiring` 均为 125 passed；新增 Presenter 独立测试为 19 passed。
+主窗口暂为 3,052 行；状态显示已迁出，S2–S6 尚未实施。
+
+首次完整门禁：lint、共享层（467 passed、18 skipped、3 deselected）及 UI 检查
+（632 checks、0 failures）通过；Studio 为 548 passed、19 skipped、2 failed。
+失败分别是 `test_adopting_a_box_result_never_flashes_the_overlay_refusal` 的两次绘制，
+以及 `test_the_replay_view_loads_a_recording_and_scrubs_it` 的录制目录缺失。
+
+两项在重构前后隔离运行均通过；重构前主窗口的完整顺序对照为 550 passed、19 skipped。
+没有修改回放实现、测试断言或失败基线来消除这些失败；其发生条件尚未确认。
+当前主窗口的最终串行 Studio 复测为 550 passed、19 skipped，与旧主窗口完整对照一致。
+S1 本批检查完成，S2 尚未开始；首次门禁失败报告仍保留，不改写为通过。
+
+UI 检查虽然断言通过，日志另有 `asset_rejected: this coordinator has been closed` 的
+异步加载回调异常；其复现条件未确认，S5 的关闭流程验收需要复核。
+
+本批使用 Windows、Python 3.10.19 和 offscreen Qt，不能作为真实设备、可见桌面操作
+或硬件 GL 验证。测试反转了标定 fallback 判断，7 项相关用例中 2 项发现错误；
+随后按字节恢复源码。197 个相关源码和测试文件的 SHA-256 在最终收尾比较中完全一致。
+文档门禁无新增问题；架构文档仍保留一项已登记的历史长段落债务，没有扩大基线。
+
+实际执行的完整检查如下，工作目录为 `D:\orisys_ws\orisys-app`；独立日志和 XML 留在
+`.scratch/studio-window-refactor/20261018-200221/`，首次门禁汇总位于相邻的
+`gate-20261018T120931Z/summary.md`。这些是本地证据，未纳入版本控制。
+
+```powershell
+powershell -NoProfile -ExecutionPolicy Bypass -File tools\gate.ps1 -Task studio-window-refactor
+& .\.venv-build\Scripts\python.exe -m pytest apps/studio/tests -m 'not timing' -p no:cacheprovider --basetemp=D:\orisys_ws\orisys-app\.scratch\studio-window-refactor\20261018-200221\pytest-final-studio --junitxml=D:\orisys_ws\orisys-app\.scratch\studio-window-refactor\20261018-200221\final-studio.xml
+```
+
+并行任务将 App HEAD 从 `433b76e` 更新至 `cf3e638`，未改动本次主窗口基准；
+相关回放分析修改不属于本批。
+根仓库的计划索引和 inventory 登记被并行任务纳入 `bf44125`，根仓库目前无本批未提交修改。
+本次没有执行提交、暂存或历史改写；产品仓库的五个交付文件保持未暂存。