feat(gui): add shared zoomable image preview

app/gui/tabs/image_studio.py

@@ -9,6 +9,7 @@ from PySide6.QtWidgets import QListView, QListWidget, QListWidgetItem, QSizePoli
 
 from ... import accounts, appconfig, cmhub_models, db, diagnostics, image_studio, image_studio_export, image_studio_images, prompts
 from .. import file_manager
+from ..image_preview import ImagePreviewDialog
 from ..widgets import *
 from ..workers import (
     ImageStudioDownloadOriginalWorker as _RealImageStudioDownloadOriginalWorker,
@@ -222,38 +223,13 @@ class ImageStudioSelectionList(QListWidget):
         return None
 
 
-class ImageStudioPreviewDialog(QDialog):
-    """Simple large image preview used by original and pool tables."""
+class ImageStudioPreviewDialog(ImagePreviewDialog):
+    """Compatibility wrapper for the shared full-image preview."""
 
     def __init__(self, asset, parent=None):
-        super().__init__(parent)
         self.asset = asset
-        self.setWindowTitle(self._title_for_asset(asset))
-        layout = QVBoxLayout(self)
-        scroll = QScrollArea()
-        scroll.setWidgetResizable(False)
-        image_label = QLabel()
-        image_label.setAlignment(Qt.AlignCenter)
         path = str(getattr(asset, "local_path", "") or "")
-        image = QImage(path) if path and os.path.isfile(path) else QImage()
-        if image.isNull():
-            image_label.setText("图片尚未下载或读取失败")
-            image_label.setMinimumSize(420, 260)
-        else:
-            image_label.setPixmap(QPixmap.fromImage(image))
-            image_label.resize(image.size())
-            self.setWindowTitle(
-                f"{self._title_for_asset(asset)} · {image.width()}x{image.height()}"
-            )
-        scroll.setWidget(image_label)
-        layout.addWidget(scroll, 1)
-        buttons = QHBoxLayout()
-        buttons.addStretch(1)
-        close_button = QPushButton("关闭")
-        close_button.clicked.connect(self.reject)
-        buttons.addWidget(close_button)
-        layout.addLayout(buttons)
-        self.resize(720, 520)
+        super().__init__(path, self._title_for_asset(asset), parent)
 
     def _title_for_asset(self, asset):
         badge = _asset_badge(getattr(asset, "kind", ""))