Enhance documentation and UI for HVideoTool: added restoration feature for detected regions, updated layout for collection controls, and improved navigation bar. Clarified tool capabilities and limitations in README and CLAUDE.md.

CLAUDE.md

@@ -38,14 +38,19 @@ a detector, draws the regions, and shows a detailed per-image list of what it fo
 
 Keep this scope sharp:
 
-- It is a **detection + overlay/inspection** tool. It does **not** remove, restore, or
-  reconstruct censored content.
-- It does **not** generate images. There is **no** ControlNet / SDXL / diffusion
-  pipeline. (`xinsir/controlnet-union-sdxl-1.0` was considered early but rejected — a
-  generative model, not a detector. Do not reintroduce it.)
+- Primary job is **detection + overlay/inspection**. A **restoration** ("расцензурить")
+  step was added later (user-requested): per-frame, on-demand, behind a `Restorer`
+  interface. The shipped engine is a cv2 **inpaint baseline** (fills, does NOT truly
+  reconstruct); a generative engine (DeepMosaics / LADA BasicVSR++) is the intended
+  real engine but needs weights + a CUDA GPU and is not wired yet.
+- Still **no diffusion / ControlNet / SDXL**. (`xinsir/controlnet-union-sdxl-1.0` was
+  rejected early — a generative *conditioning* model, not a censorship restorer. Don't
+  reintroduce it.) Restoration, if upgraded, uses a mosaic-removal model (DeepMosaics/
+  LADA), not a general text-to-image diffusion pipeline.
 - It detects **already-censored** regions, not "content that should be censored"
   (i.e. not an NSFW classifier).
-- It does **not** decode video. No PyAV. Input is image files only.
+- Video is only a one-shot frame-extraction convenience (see below); detection and
+  restoration operate on image folders.
 
 ## Target environment
 
@@ -91,6 +96,11 @@ hvideotool/
     ├── video/
     │   ├── extract.py   # extract_frames(): ffmpeg CLI (cv2 fallback) -> JPGs; keyframe/step modes + downscale
     │   └── frame.py     # Frame dataclass (image BGR, index, pts) — the detector input type
+    ├── restore/         # "un-censor" detected regions (per-frame)
+    │   ├── base.py      #   Restorer ABC: restore(image, detections) -> image
+    │   ├── factory.py   #   build_restorer(name) -> inpaint (deepmosaics/lada = not wired yet)
+    │   ├── inpaint.py   #   InpaintRestorer (cv2) — baseline, fills not reconstructs
+    │   └── mask.py      #   detections_to_mask(shape, dets, dilate)
     └── detection/
         ├── base.py      # Detector ABC: detect(frame) -> list[Detection]
         ├── factory.py   # build_detector(config) -> classic | yolo | combined
@@ -115,12 +125,32 @@ hvideotool/
   "Детектировать все" (whole folder, progress bar). Do NOT re-add auto-detect-on-select.
   Results cache in `_results`; the file-list row gets a count suffix when computed.
   Switching detector/model clears the cache (`_invalidate_results`).
-- **Collections (curation).** "Создать коллекцию…" makes a destination folder
-  (`_collections_base()` = the opened folder's parent, else `~/HVideoTool/collections`)
-  and marks it active. The file list is `ExtendedSelection`; "В коллекцию" / Ctrl+M
-  **moves** (`shutil.move`, not copy) the selected frames there, removing them from the
+- **Collections (curation).** A combo in the left pane (next to the file list, since it
+  acts on the list selection — not on the toolbar, to keep that uncluttered)
+  (`collection_combo`) picks the active destination; `_refresh_collections()` repopulates it from sibling folders of the
+  opened folder (`_collections_base()` = the opened folder's parent, else
+  `~/HVideoTool/collections`) on load/create, so previously-made collections are
+  reselectable. Items carry the path in itemData; "— не выбрана —" = None,
+  "Выбрать папку…" = `"__browse__"` sentinel → `_browse_collection()` for an arbitrary
+  folder (kept in the combo even if outside base). "Создать…" makes a new one and
+  selects it. The file list is `ExtendedSelection`; "В коллекцию" / Ctrl+M **moves**
+  (`shutil.move`, not copy) the selected frames there, removing them from
   list/`_files`/cache. `_unique_dest` avoids clobbering (`foo.jpg` → `foo (1).jpg`).
   Use case: sort frames into a training/example set while inspecting detections.
+- **Restoration ("Расцензурить кадр").** Toolbar action runs `self._restorer` (built via
+  `build_restorer`) on the current frame's detections (computing them first if needed),
+  caches the result in `_restored[path]`, and shows it overlay-free. "Показать оригинал/
+  результат" toggles (`_showing_restored`); "Сохранить результат" writes
+  `<stem>_restored.jpg` into the active collection (or beside the frame). The baseline
+  is cv2 inpaint — honest: it fills, doesn't reconstruct. To add a real engine,
+  implement `core/restore/base.Restorer`, register it in `restore/factory.build_restorer`,
+  and swap `self._restorer`. `_show` resets `_showing_restored` + `_update_restore_actions`.
+- **Navigation bar** under the image (`_build_nav_bar`): prev/next frame (◀ ▶, keys
+  `,`/`.`), a scrubber `frame_slider` across the whole sequence, a `pos_label`
+  ("row / n"), and jump-to-detection (◀ детекция / детекция ▶, keys `[`/`]`,
+  `_step_hit` scans `_results` for the next non-empty frame). The slider and file list
+  are kept in sync via `_update_nav` guarded by `_nav_sync` (avoids signal loops); all
+  navigation ultimately drives `file_list.setCurrentRow`.
 - `image_view.ImageView` draws the image scaled-to-fit plus overlays. Overlay
   visibility/threshold are applied at paint time. Selecting a row in the detail table
   calls `set_highlight(i)` — that detection is drawn boldly (even below threshold) and

README.md

@@ -31,13 +31,25 @@
   уверенности прямо в тулбаре — удобно сравнивать.
 - Выбор файла весов модели кнопкой **«Модель…»**.
 
+## Восстановление (расцензуривание)
+
+Кнопка **«Расцензурить кадр»** восстанавливает найденные области на текущем кадре,
+**«Показать оригинал/результат»** переключает вид, **«Сохранить результат»** пишет
+`<имя>_restored.jpg` (в активную коллекцию или рядом с кадром).
+
+> ⚠️ Сейчас движок восстановления — **инпейнт (cv2)**: он *заполняет* область по
+> окружению, но **не реконструирует** скрытые детали (замазывает, а не раскрывает).
+> Настоящее восстановление мозаики требует генеративной модели (DeepMosaics или
+> [LADA](https://github.com/ladaapp/lada) на BasicVSR++) и **GPU NVIDIA/CUDA**; на
+> аниме качество таких моделей ограничено. Движок подключается через интерфейс
+> `core/restore/base.Restorer` (`build_restorer`) — инпейнт сейчас стоит заглушкой.
+
 ## Что НЕ делает (осознанно вне области задачи)
 
-- Не **удаляет** и не **восстанавливает** зацензуренный контент.
-- Не **генерирует** изображения (никакого ControlNet/SDXL/диффузии).
+- Не **генерирует** изображения через диффузию (никакого ControlNet/SDXL).
 - Не детектирует «контент, который следовало бы зацензурить» (NSFW) — ищем
   именно **уже наложенную** цензуру.
-- Не декодирует видео — работает с готовыми картинками.
+- Полноценное генеративное восстановление пока не подключено (см. выше).
 
 ---
 

hvideotool/core/restore/__init__.py

@@ -0,0 +1 @@
+

hvideotool/core/restore/base.py

@@ -0,0 +1,26 @@
+"""Restorer interface — "un-censor" detected regions of an image.
+
+A Restorer takes an image plus the detected censored regions and returns a new
+image with those regions reconstructed/filled. This mirrors the ``Detector``
+abstraction so different engines (classic inpaint now; a generative model like
+DeepMosaics / LADA later) plug in behind the same interface.
+"""
+
+from __future__ import annotations
+
+from abc import ABC, abstractmethod
+
+import numpy as np
+
+from ..detection.types import Detection
+
+
+class Restorer(ABC):
+    @property
+    def name(self) -> str:
+        return type(self).__name__
+
+    @abstractmethod
+    def restore(self, image: np.ndarray, detections: list[Detection]) -> np.ndarray:
+        """Return a copy of ``image`` with the detected regions reconstructed."""
+        raise NotImplementedError

hvideotool/core/restore/factory.py

@@ -0,0 +1,22 @@
+"""Restorer factory: build a Restorer by name.
+
+Currently only the cv2 inpaint baseline is wired. Generative engines
+(DeepMosaics / LADA BasicVSR++) are placeholders — they need model weights and a
+CUDA GPU, and raise a clear, actionable error until integrated. See README.
+"""
+
+from __future__ import annotations
+
+from .base import Restorer
+from .inpaint import InpaintRestorer
+
+
+def build_restorer(name: str = "inpaint", model_path: str | None = None) -> Restorer:
+    if name == "inpaint":
+        return InpaintRestorer()
+    if name in ("deepmosaics", "lada"):
+        raise ValueError(
+            "Генеративное восстановление пока не подключено.\n"
+            "Нужна модель (DeepMosaics / LADA) и GPU (CUDA). См. README → Восстановление."
+        )
+    raise ValueError(f"Неизвестный режим восстановления: {name!r}")

hvideotool/core/restore/inpaint.py

@@ -0,0 +1,35 @@
+"""Classic inpainting restorer (cv2) — the always-available baseline.
+
+HONEST LIMITATION: cv2 inpainting fills the masked region by propagating
+surrounding pixels. It removes the mosaic/bar but does NOT reconstruct the hidden
+detail — it smooths/guesses. For real reconstruction a generative model
+(DeepMosaics / LADA) is needed; this is the no-weights, no-GPU fallback so the
+"Расцензурить кадр" flow works end-to-end today.
+"""
+
+from __future__ import annotations
+
+import cv2
+import numpy as np
+
+from ..detection.types import Detection
+from .base import Restorer
+from .mask import detections_to_mask
+
+
+class InpaintRestorer(Restorer):
+    def __init__(self, radius: int = 3, dilate: int = 2, method: str = "telea") -> None:
+        self.radius = radius
+        self.dilate = dilate
+        self.method = method
+
+    @property
+    def name(self) -> str:
+        return f"InpaintRestorer({self.method})"
+
+    def restore(self, image: np.ndarray, detections: list[Detection]) -> np.ndarray:
+        if not detections:
+            return image.copy()
+        mask = detections_to_mask(image.shape, detections, dilate=self.dilate)
+        flags = cv2.INPAINT_TELEA if self.method == "telea" else cv2.INPAINT_NS
+        return cv2.inpaint(image, mask, self.radius, flags)

hvideotool/core/restore/mask.py

@@ -0,0 +1,26 @@
+"""Build a binary mask of the censored regions from detections."""
+
+from __future__ import annotations
+
+import cv2
+import numpy as np
+
+from ..detection.types import Detection
+
+
+def detections_to_mask(
+    shape: tuple[int, int], detections: list[Detection], dilate: int = 0
+) -> np.ndarray:
+    """White (255) over every detected region (polygon if present, else bbox)."""
+    h, w = shape[:2]
+    mask = np.zeros((h, w), np.uint8)
+    for d in detections:
+        if len(d.polygon) >= 3:
+            cv2.fillPoly(mask, [np.array(d.polygon, np.int32)], 255)
+        else:
+            x, y, bw, bh = d.bbox
+            cv2.rectangle(mask, (x, y), (x + bw, y + bh), 255, -1)
+    if dilate > 0:
+        k = np.ones((dilate * 2 + 1, dilate * 2 + 1), np.uint8)
+        mask = cv2.dilate(mask, k)
+    return mask

hvideotool/ui/main_window.py

@@ -1,8 +1,10 @@
 """Main window: open a folder of images and inspect what the detector found.
 
-Layout: a toolbar (open folder · detector · model · calc-frame · detect-all ·
-threshold), then a splitter with three panes — the file list (left), the image
-with overlays (center), and a detail table of every detection (right).
+Layout: a toolbar (open folder · from-video · detector · model · calc-frame ·
+detect-all · threshold), then a splitter with three panes — left: collection
+controls + the file list; center: the image with overlays; right: a detail table
+of every detection. Collection controls sit by the file list (they act on its
+selection), keeping the toolbar to detection/entry actions only.
 
 Viewing and detecting are decoupled, so browsing a big folder stays instant even
 with a slow (CPU) detector:
@@ -19,7 +21,7 @@ import shutil
 from pathlib import Path
 
 from PySide6.QtCore import Qt
-from PySide6.QtGui import QAction
+from PySide6.QtGui import QAction, QKeySequence, QShortcut
 from PySide6.QtWidgets import (
     QAbstractItemView,
     QApplication,
@@ -27,6 +29,7 @@ from PySide6.QtWidgets import (
     QDialog,
     QDoubleSpinBox,
     QFileDialog,
+    QHBoxLayout,
     QInputDialog,
     QLabel,
     QListWidget,
@@ -34,6 +37,8 @@ from PySide6.QtWidgets import (
     QMainWindow,
     QMessageBox,
     QProgressBar,
+    QPushButton,
+    QSlider,
     QSplitter,
     QTableWidget,
     QTableWidgetItem,
@@ -45,7 +50,8 @@ from .. import settings_store
 from ..config import AppConfig
 from ..core.detection.factory import build_detector
 from ..core.detection.types import Detection
-from ..core.imageio import imread_unicode
+from ..core.imageio import imread_unicode, imwrite_unicode
+from ..core.restore.factory import build_restorer
 from ..core.video.extract import extract_frames
 from ..core.video.frame import Frame
 from .extract_dialog import ExtractDialog
@@ -67,6 +73,10 @@ class MainWindow(QMainWindow):
         self._results: dict[str, list[Detection]] = {}  # path -> detections (cache)
         self._current: Path | None = None
         self._collection: Path | None = None  # active destination folder for moves
+        self._restorer = build_restorer("inpaint")  # un-censor engine (baseline)
+        self._restored: dict[str, "object"] = {}    # path -> restored image (BGR ndarray)
+        self._showing_restored = False
+        self._nav_sync = False  # guard against slider<->list signal loops
 
         self.setWindowTitle("HVideoTool — инспектор детекции цензуры")
         self.resize(1180, 720)
@@ -75,6 +85,7 @@ class MainWindow(QMainWindow):
         self._build_central()
         self._build_statusbar()
         self._build_menu()
+        self._refresh_collections()
         self.statusBar().showMessage("Откройте папку с картинками")
 
     # ------------------------------------------------------------------ setup
@@ -117,6 +128,17 @@ class MainWindow(QMainWindow):
         tb.addAction(calc)
         tb.addAction(QAction("Детектировать все", self, triggered=self._detect_all))
 
+        tb.addSeparator()
+        restore = QAction("Расцензурить кадр", self, triggered=self._restore_current)
+        restore.setToolTip("Восстановить найденные области на текущем кадре")
+        tb.addAction(restore)
+        self.toggle_restored_action = QAction("Показать оригинал", self, triggered=self._toggle_restored)
+        self.toggle_restored_action.setEnabled(False)
+        tb.addAction(self.toggle_restored_action)
+        self.save_restored_action = QAction("Сохранить результат", self, triggered=self._save_restored)
+        self.save_restored_action.setEnabled(False)
+        tb.addAction(self.save_restored_action)
+
         tb.addSeparator()
         tb.addWidget(QLabel(" Порог: "))
         self.threshold_spin = QDoubleSpinBox()
@@ -126,22 +148,44 @@ class MainWindow(QMainWindow):
         self.threshold_spin.valueChanged.connect(self._on_threshold_changed)
         tb.addWidget(self.threshold_spin)
 
-        tb.addSeparator()
-        tb.addAction(QAction("Создать коллекцию…", self, triggered=self._create_collection))
-        move = QAction("В коллекцию →", self, triggered=self._move_to_collection)
-        move.setToolTip("Переместить выбранные кадры в активную коллекцию (Ctrl+M)")
-        tb.addAction(move)
-        self.collection_label = QLabel(" коллекция: —")
-        tb.addWidget(self.collection_label)
-
     def _build_central(self) -> None:
         self.file_list = QListWidget()
         self.file_list.setSelectionMode(QAbstractItemView.ExtendedSelection)  # multi-select for moves
         self.file_list.currentItemChanged.connect(self._on_file_selected)
         self.file_list.itemDoubleClicked.connect(self._on_file_activated)
 
+        # Collection controls live next to the file list — they act on its selection.
+        self.collection_combo = QComboBox()
+        self.collection_combo.setToolTip("Активная коллекция, куда перемещаются кадры")
+        self.collection_combo.activated.connect(self._on_collection_selected)
+        new_coll = QPushButton("Создать")
+        new_coll.clicked.connect(self._create_collection)
+        move_btn = QPushButton("В коллекцию →")
+        move_btn.setToolTip("Переместить выбранные кадры в активную коллекцию (Ctrl+M)")
+        move_btn.clicked.connect(self._move_to_collection)
+
+        coll_row = QHBoxLayout()
+        coll_row.setContentsMargins(0, 0, 0, 0)
+        coll_row.addWidget(QLabel("Коллекция:"))
+        coll_row.addWidget(self.collection_combo, 1)
+        coll_row.addWidget(new_coll)
+
+        left = QWidget()
+        left_layout = QVBoxLayout(left)
+        left_layout.setContentsMargins(4, 4, 4, 4)
+        left_layout.setSpacing(4)
+        left_layout.addLayout(coll_row)
+        left_layout.addWidget(self.file_list, 1)
+        left_layout.addWidget(move_btn)
+
         self.view = ImageView(self._cfg.overlay)
         self.view.set_threshold(self._cfg.default_threshold)
+        center = QWidget()
+        clayout = QVBoxLayout(center)
+        clayout.setContentsMargins(0, 0, 0, 0)
+        clayout.setSpacing(2)
+        clayout.addWidget(self.view, 1)
+        clayout.addWidget(self._build_nav_bar())
 
         right = QWidget()
         rlayout = QVBoxLayout(right)
@@ -158,8 +202,8 @@ class MainWindow(QMainWindow):
         rlayout.addWidget(self.detail_table)
 
         splitter = QSplitter(Qt.Horizontal)
-        splitter.addWidget(self.file_list)
-        splitter.addWidget(self.view)
+        splitter.addWidget(left)
+        splitter.addWidget(center)
         splitter.addWidget(right)
         splitter.setStretchFactor(0, 0)
         splitter.setStretchFactor(1, 1)
@@ -167,6 +211,87 @@ class MainWindow(QMainWindow):
         splitter.setSizes([240, 640, 300])
         self.setCentralWidget(splitter)
 
+    def _build_nav_bar(self) -> QWidget:
+        bar = QWidget()
+        h = QHBoxLayout(bar)
+        h.setContentsMargins(4, 2, 4, 2)
+
+        self.prev_btn = QPushButton("◀")
+        self.prev_btn.setToolTip("Предыдущий кадр (,)")
+        self.prev_btn.clicked.connect(lambda: self._step(-1))
+        self.next_btn = QPushButton("▶")
+        self.next_btn.setToolTip("Следующий кадр (.)")
+        self.next_btn.clicked.connect(lambda: self._step(1))
+
+        self.frame_slider = QSlider(Qt.Horizontal)
+        self.frame_slider.setMinimum(0)
+        self.frame_slider.setMaximum(0)
+        self.frame_slider.setToolTip("Перемотка по кадрам (стрелки ← →)")
+        self.frame_slider.valueChanged.connect(self._on_slider)
+
+        self.pos_label = QLabel("0 / 0")
+        self.pos_label.setMinimumWidth(90)
+        self.pos_label.setAlignment(Qt.AlignCenter)
+
+        self.prev_hit_btn = QPushButton("◀ детекция")
+        self.prev_hit_btn.setToolTip("Предыдущий кадр с детекцией ([)")
+        self.prev_hit_btn.clicked.connect(lambda: self._step_hit(-1))
+        self.next_hit_btn = QPushButton("детекция ▶")
+        self.next_hit_btn.setToolTip("Следующий кадр с детекцией (])")
+        self.next_hit_btn.clicked.connect(lambda: self._step_hit(1))
+
+        for wdg in (self.prev_btn, self.next_btn, self.frame_slider, self.pos_label,
+                    self.prev_hit_btn, self.next_hit_btn):
+            h.addWidget(wdg, 1 if wdg is self.frame_slider else 0)
+
+        # Keyboard shortcuts (window-wide), chosen to not clash with list/slider arrows.
+        QShortcut(QKeySequence(","), self, lambda: self._step(-1))
+        QShortcut(QKeySequence("."), self, lambda: self._step(1))
+        QShortcut(QKeySequence("["), self, lambda: self._step_hit(-1))
+        QShortcut(QKeySequence("]"), self, lambda: self._step_hit(1))
+        return bar
+
+    # -------------------------------------------------------------- navigation
+    def _step(self, delta: int) -> None:
+        n = self.file_list.count()
+        if n == 0:
+            return
+        row = max(0, min(n - 1, self.file_list.currentRow() + delta))
+        self.file_list.setCurrentRow(row)
+
+    def _step_hit(self, direction: int) -> None:
+        """Jump to the nearest frame (in `direction`) that has detections."""
+        n = self.file_list.count()
+        if n == 0:
+            return
+        row = self.file_list.currentRow()
+        i = row + direction
+        while 0 <= i < n:
+            path = self.file_list.item(i).data(Qt.UserRole)
+            if self._results.get(path):
+                self.file_list.setCurrentRow(i)
+                return
+            i += direction
+        self.statusBar().showMessage(
+            "Больше нет кадров с детекцией в эту сторону "
+            "(сначала «Детектировать все»)"
+        )
+
+    def _on_slider(self, value: int) -> None:
+        if self._nav_sync:
+            return
+        if value != self.file_list.currentRow():
+            self.file_list.setCurrentRow(value)
+
+    def _update_nav(self) -> None:
+        n = self.file_list.count()
+        row = self.file_list.currentRow()
+        self._nav_sync = True
+        self.frame_slider.setMaximum(max(0, n - 1))
+        self.frame_slider.setValue(max(0, row))
+        self._nav_sync = False
+        self.pos_label.setText(f"{row + 1 if row >= 0 else 0} / {n}")
+
     def _build_statusbar(self) -> None:
         self.progress = QProgressBar()
         self.progress.setMaximumWidth(260)
@@ -292,14 +417,17 @@ class MainWindow(QMainWindow):
         self.file_list.blockSignals(False)
         self.progress.setVisible(False)
 
+        self._refresh_collections()
         if not files:
             self.view.set_image(None, [])
+            self._update_nav()
             self.statusBar().showMessage(f"В папке нет картинок: {folder}")
             return
         self.statusBar().showMessage(f"{len(files)} картинок · {folder} · двойной клик / «Рассчитать кадр» для детекции")
         self.file_list.setCurrentRow(0)
 
     def _on_file_selected(self, current: QListWidgetItem | None, _prev=None) -> None:
+        self._update_nav()
         if current is not None:
             self._show(Path(current.data(Qt.UserRole)))  # view only — no detection
 
@@ -335,10 +463,12 @@ class MainWindow(QMainWindow):
     def _show(self, path: Path) -> None:
         """Display the image with its cached detections (does not run the detector)."""
         self._current = path
+        self._showing_restored = False
         img = imread_unicode(str(path))
         dets = self._results.get(str(path))  # None => not yet computed
         self.view.set_image(img, dets or [])
         self._fill_detail_table(path, img, dets)
+        self._update_restore_actions()
 
     def _recompute_current(self) -> None:
         """Toolbar/Space: (re)run the detector on the selected frame."""
@@ -370,6 +500,65 @@ class MainWindow(QMainWindow):
         if self._current is not None:
             self._show(self._current)
 
+    # ------------------------------------------------------------- restoration
+    def _restore_current(self) -> None:
+        """Run the restorer on the current frame's detected regions and show it."""
+        if self._current is None:
+            return
+        key = str(self._current)
+        if key not in self._results and self._detect(self._current) is None:
+            return
+        dets = self._results.get(key) or []
+        if not dets:
+            self.statusBar().showMessage("Нет найденных областей — нечего расцензуривать")
+            return
+        img = imread_unicode(key)
+        if img is None:
+            return
+        self.statusBar().showMessage(f"Восстановление: {self._current.name}…")
+        QApplication.processEvents()
+        try:
+            restored = self._restorer.restore(img, dets)
+        except Exception as exc:  # noqa: BLE001 - surface model/engine errors
+            QMessageBox.warning(self, "Ошибка восстановления", str(exc))
+            return
+        self._restored[key] = restored
+        self._showing_restored = True
+        self.view.set_image(restored, [])
+        self._update_restore_actions()
+        self.statusBar().showMessage(
+            f"Расцензурено ({self._restorer.name}): {self._current.name} — {len(dets)} обл."
+        )
+
+    def _toggle_restored(self) -> None:
+        if self._current is None or str(self._current) not in self._restored:
+            return
+        self._showing_restored = not self._showing_restored
+        key = str(self._current)
+        if self._showing_restored:
+            self.view.set_image(self._restored[key], [])
+        else:
+            self.view.set_image(imread_unicode(key), self._results.get(key) or [])
+        self._update_restore_actions()
+
+    def _update_restore_actions(self) -> None:
+        has = self._current is not None and str(self._current) in self._restored
+        self.toggle_restored_action.setEnabled(has)
+        self.toggle_restored_action.setText(
+            "Показать оригинал" if self._showing_restored else "Показать результат"
+        )
+        self.save_restored_action.setEnabled(has)
+
+    def _save_restored(self) -> None:
+        if self._current is None or str(self._current) not in self._restored:
+            return
+        dest_dir = self._collection or self._current.parent
+        out = self._unique_dest(dest_dir, f"{self._current.stem}_restored.jpg")
+        if imwrite_unicode(str(out), self._restored[str(self._current)]):
+            self.statusBar().showMessage(f"Сохранено: {out}")
+        else:
+            QMessageBox.warning(self, "Ошибка", "Не удалось сохранить файл.")
+
     # ------------------------------------------------------------ collections
     def _collections_base(self) -> Path:
         """Where new collections are created: next to the opened folder, else home."""
@@ -377,6 +566,53 @@ class MainWindow(QMainWindow):
             return self._folder.parent
         return Path.home() / "HVideoTool" / "collections"
 
+    def _refresh_collections(self) -> None:
+        """Repopulate the collection combo from sibling folders of the opened folder.
+
+        Keeps the active collection selected (and present even if it lives elsewhere).
+        """
+        base = self._collections_base()
+        subdirs = []
+        if base.exists():
+            subdirs = sorted(
+                (p for p in base.iterdir() if p.is_dir() and p != self._folder),
+                key=lambda p: p.name.lower(),
+            )
+        self.collection_combo.blockSignals(True)
+        self.collection_combo.clear()
+        self.collection_combo.addItem("— не выбрана —", None)
+        for p in subdirs:
+            self.collection_combo.addItem(p.name, str(p))
+        # Make sure the active collection is listed even if it's outside base.
+        if self._collection is not None and self.collection_combo.findData(str(self._collection)) < 0:
+            self.collection_combo.addItem(self._collection.name, str(self._collection))
+        self.collection_combo.addItem("Выбрать папку…", "__browse__")
+        self._select_active_in_combo()
+        self.collection_combo.blockSignals(False)
+
+    def _select_active_in_combo(self) -> None:
+        idx = self.collection_combo.findData(str(self._collection)) if self._collection else 0
+        self.collection_combo.setCurrentIndex(max(0, idx))
+
+    def _on_collection_selected(self, _index: int) -> None:
+        data = self.collection_combo.currentData()
+        if data == "__browse__":
+            self._browse_collection()
+            return
+        self._collection = Path(data) if data else None
+        if self._collection is not None:
+            self.statusBar().showMessage(f"Активная коллекция: {self._collection}")
+
+    def _browse_collection(self) -> None:
+        start = str(self._collections_base())
+        folder = QFileDialog.getExistingDirectory(self, "Выбрать коллекцию", start)
+        if folder:
+            self._collection = Path(folder)
+            self._refresh_collections()
+            self.statusBar().showMessage(f"Активная коллекция: {folder}")
+        else:
+            self._select_active_in_combo()  # revert the combo to the current collection
+
     def _create_collection(self) -> None:
         name, ok = QInputDialog.getText(self, "Создать коллекцию", "Имя коллекции:")
         name = name.strip()
@@ -389,19 +625,14 @@ class MainWindow(QMainWindow):
             QMessageBox.warning(self, "Ошибка", f"Не удалось создать коллекцию:\n{exc}")
             return
         self._collection = path
-        self._update_collection_label()
+        self._refresh_collections()
         self.statusBar().showMessage(f"Активная коллекция: {path}")
 
-    def _update_collection_label(self) -> None:
-        self.collection_label.setText(
-            f" коллекция: {self._collection.name}" if self._collection else " коллекция: —"
-        )
-
     def _move_to_collection(self) -> None:
         if self._collection is None:
             QMessageBox.information(
                 self, "Нет коллекции",
-                "Сначала создайте коллекцию (кнопка «Создать коллекцию…»).",
+                "Сначала выберите коллекцию в списке или создайте новую («Создать…»).",
             )
             return
         items = self.file_list.selectedItems()
@@ -433,6 +664,7 @@ class MainWindow(QMainWindow):
             self._show(Path(cur.data(Qt.UserRole)))
         elif self.file_list.count() == 0:
             self.view.set_image(None, [])
+        self._update_nav()
 
     @staticmethod
     def _unique_dest(folder: Path, name: str) -> Path: