Settings: add Storage section showing state dir, DB, cover cache, and user data paths

app/gui.py

@@ -1280,6 +1280,22 @@ class SettingsPage(QWidget):
         form.addRow(self.clear_covers_btn)
         col.addWidget(box)
 
+        # -- Storage ---------------------------------------------------------- #
+        box, form = self._group("Storage")
+        self._path_row(form, "State directory", str(config.STATE_DIR))
+        self._path_row(form, "Library database", str(config.DB_PATH))
+        self._path_row(form, "Cover cache", str(config.COVERS_DIR))
+        self._path_row(form, "User data (credentials, NPS cache…)", str(config.USER_DATA_DIR))
+        note = QLabel(
+            "Your library, covers, and credentials live here — outside the app "
+            "bundle, so they survive upgrades. On Linux this is the "
+            "~/.local/state/psp-preserve folder."
+        )
+        note.setWordWrap(True)
+        note.setStyleSheet("color: #9a9ba5;")
+        form.addRow(note)
+        col.addWidget(box)
+
         col.addStretch(1)
 
     def _group(self, title):
@@ -1342,6 +1358,29 @@ class SettingsPage(QWidget):
         form.addRow(label, edit)
         return edit
 
+    def _path_row(self, form, label, path):
+        edit = QLineEdit(path)
+        edit.setReadOnly(True)
+        open_btn = QPushButton("Open")
+        open_btn.clicked.connect(lambda _=False, p=Path(path): self._open_path(p))
+        row = QWidget()
+        h = QHBoxLayout(row)
+        h.setContentsMargins(0, 0, 0, 0)
+        h.addWidget(edit, 1)
+        h.addWidget(open_btn)
+        form.addRow(label, row)
+        return edit
+
+    @staticmethod
+    def _open_path(path):
+        path = Path(path)
+        target = path if path.is_dir() else path.parent
+        if target.is_dir():
+            QDesktopServices.openUrl(QUrl.fromLocalFile(str(target)))
+        else:
+            QMessageBox.information(None, "Not found",
+                                    f"Folder not created yet:\n{target}\n\nIt is created on first use.")
+
     def games_dir(self):
         return self.games_edit.text().strip()