Add the previewer_did_init hook (#1882)

qt/aqt/browser/previewer.py

@@ -52,6 +52,7 @@ class Previewer(QDialog):
         self.mw = mw
         disable_help_button(self)
         setWindowIcon(self)
+        gui_hooks.previewer_did_init(self)
 
     def card(self) -> Card | None:
         raise NotImplementedError

qt/tools/genhooks_gui.py

@@ -472,6 +472,13 @@ hooks = [
         Every column in the dictionary will be toggleable by the user.
         """,
     ),
+    # Previewer
+    ###################
+    Hook(
+        name="previewer_did_init",
+        args=["previewer: aqt.browser.previewer.Previewer"],
+        doc="""Called after the previewer is initialized.""",
+    ),
     # Main window states
     ###################
     # these refer to things like deckbrowser, overview and reviewer state,