fix: make admin reset delete gui.db and restart the app

src/openstan/presenters/admin_presenter.py

@@ -1,4 +1,6 @@
+import os
 import shutil
+import sys
 import traceback
 from pathlib import Path
 from typing import TYPE_CHECKING
@@ -7,7 +9,6 @@
 from PySide6.QtWidgets import QApplication, QMessageBox
 
 from openstan.components import StanErrorMessage, StanInfoMessage
-from openstan.data.create_gui_db import create_gui_db
 from openstan.paths import Paths
 
 if TYPE_CHECKING:
@@ -182,12 +183,14 @@ def remove_project_from_ui(self) -> None:
 
     @Slot()
     def empty_gui_db(self) -> None:
-        """Delete and recreate gui.db, then quit the application."""
+        """Delete gui.db and restart the application."""
         if not self._confirm(
             "Confirm Reset",
             "Reset the application?\n\n"
-            "This will permanently delete all projects, sessions, and users from gui.db "
-            "and close the application.\n\n"
+            "This will remove all project records, sessions, and users from gui.db "
+            "and restart the application.\n\n"
+            "Your project folders and data will not be affected — "
+            "you can re-attach them using 'Add Existing Project' on startup.\n\n"
             "This action cannot be undone.",
             icon=QMessageBox.Icon.Critical,
         ):
@@ -201,14 +204,25 @@ def empty_gui_db(self) -> None:
         try:
             if gui_db_path.exists():
                 gui_db_path.unlink()
-            create_gui_db(gui_db_path)
         except Exception:  # noqa: BLE001
             traceback.print_exc()
             StanErrorMessage(parent=self.view).showMessage(
-                "Failed to recreate gui.db. The application will now close."
+                "Failed to delete gui.db. The application will now close."
             )
+            QApplication.quit()
+            return
 
-        QApplication.quit()
+        # Restart — the new process will recreate gui.db on startup
+        argv = list(getattr(sys, "orig_argv", sys.argv))
+        argv[0] = sys.executable
+        try:
+            os.execv(sys.executable, argv)
+        except OSError:
+            traceback.print_exc()
+            StanErrorMessage(parent=self.view).showMessage(
+                "Failed to restart the application. The application will now close."
+            )
+            QApplication.quit()
 
     @Slot()
     def open_anonymise_tool(self) -> None:

src/openstan/views/admin_view.py

@@ -104,15 +104,17 @@ def __init__(self, parent=None) -> None:
 
         lbl_empty_title = StanLabel("##### Reset Application")
         lbl_empty_info = StanLabel(
-            "Deletes and recreates gui.db, then closes the application. "
-            "All projects, sessions, and users will be permanently lost. "
+            "Removes all project records, sessions, and users from gui.db "
+            "and restarts the application. Project folders and data are not affected — "
+            "re-attach them using 'Add Existing Project' on startup. "
             "This action cannot be undone."
         )
         lbl_empty_info.setWordWrap(True)
 
         self.button_empty_db = StanButton("Empty Database && Restart")
         self.button_empty_db.setToolTip(
-            "Delete and recreate gui.db, then restart the application — all projects, sessions, and users will be permanently lost"
+            "Remove all project records, sessions, and users from gui.db and restart — "
+            "project folders and data are unaffected"
         )
         self.button_empty_db.setStyleSheet(
             "StanButton { color: palette(highlight); font-weight: bold; }"