feat(files): sync Source panel browser with chosen save directory

src/pygui/ISC/HomePage.qml

@@ -88,7 +88,9 @@ Rectangle {
         id: saveDirDialog
         title: "Choose a folder to save Data"
         onAccepted: {
-            deviceController.setSaveDataDir(root.cleanFolderUrl(selectedFolder))
+            var dir = root.cleanFolderUrl(selectedFolder)
+            deviceController.setSaveDataDir(dir)
+            file_browser.setCurrentDirectory(dir)
             root._doDetect()
         }
     }

src/pygui/ISC/Tabs/StatusTab.qml

@@ -122,7 +122,9 @@ ColumnLayout {
         id: saveDirDialog
         title: "Choose a folder to save."
         onAccepted: {
-            deviceController.setSaveDataDir(root.cleanFolderUrl(selectedFolder));
+            var dir = root.cleanFolderUrl(selectedFolder);
+            deviceController.setSaveDataDir(dir);
+            file_browser.setCurrentDirectory(dir);
             root.parseAndSavePendingRead();
         }
     }
@@ -132,7 +134,11 @@ ColumnLayout {
     FolderDialog {
         id: dirOnlyDialog
         title: "Choose a folder to save Data"
-        onAccepted: deviceController.setSaveDataDir(root.cleanFolderUrl(selectedFolder))
+        onAccepted: {
+            var dir = root.cleanFolderUrl(selectedFolder);
+            deviceController.setSaveDataDir(dir);
+            file_browser.setCurrentDirectory(dir);
+        }
     }
 
     // Post-read metadata editor (C# parity: EditCSVMetadataDialog after read).

src/pygui/__main__.py

@@ -74,6 +74,9 @@ def main() -> int:
     device_controller = DeviceController(raw_settings, data_dir)
     engine.rootContext().setContextProperty("deviceController", device_controller)
 
+    # Source panel browses the same folder recordings/reads are saved to.
+    select_file_dialog_model.setCurrentDirectory(str(device_controller.saveDataDir))
+
     # ===== License Model (About dialog grid, replay trial) =====
     license_model = LicenseModel(data_dir)
     engine.rootContext().setContextProperty("licenseModel", license_model)

src/pygui/backend/data/file_browser.py

@@ -37,6 +37,16 @@ class FileBrowser(QObject):
         return str(self._current_directory)
 
     # ===== Directory Selection =====
+    @Slot(str)
+    def setCurrentDirectory(self, path: str) -> None:
+        """Point the browser at `path` without opening a native dialog.
+
+        Used to keep this directory in sync with DeviceController.saveDataDir
+        when the user picks a save folder elsewhere in the app.
+        """
+        self._set_current_directory(Path(path))
+        self._refresh_files(show_empty_message=False)
+
     @Slot()
     def chooseDirectory(self) -> None:
         selected_dir = QFileDialog.getExistingDirectory(