gui: bypass XDG portal for all file/dir dialogs in Flatpak

The v0.1.2 fix that forced Qt's non-native dialog for the "open test"
dialog only covered one call site. The same XDG-portal-vs-sibling-files
problem applies to every other QFileDialog in the GUI (save report,
log file path, default report/log dirs in preferences, python/lua
interpreter pickers).

Extracted a single ``file_dialog.options()`` helper in main_win/ and
threaded it through every getOpenFileName / getSaveFileName /
getExistingDirectory call in main_win/. Outside Flatpak the helper
returns an empty Options(), so the native dialog stays in use on
KDE / GNOME / Windows / macOS.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

release_note.txt

@@ -1,3 +1,22 @@
+version 0.1.3
+==============
+- Stop interrupts engaged blocking steps (console, py_func, lua_func,
+  json_rpc, sleep) within ~200 ms instead of waiting for the step
+  to finish.
+- GUI Start / Stop / Pause flow simplified.
+- lua_func: a function returning nil is no longer reported as a failure.
+- ``-d python_bin=...`` and the GUI ``python_bin`` preference now reach
+  the eval subprocess (used to be silently ignored). ``param.yaml`` can
+  also override ``python_bin`` for py_func / cycle / post_exec.
+- Validation suite: ``test/validation/run.sh`` (and ``run.bat``)
+  runs the suite inside a dedicated venv in the system temp dir.
+- build_all.sh: ``release_note.txt`` and the user manual copied into
+  ``dist/``; warning if the file has no entry for the version being built.
+- Flatpak: every GUI file/directory dialog (open test, save report, log
+  path, default report/log dirs, python/lua interpreter pickers) now
+  bypasses the XDG document portal — the v0.1.2 fix was only on the
+  "open test" dialog.
+
 version 0.1.2
 ==============
 - Flatpak: opening a test from the GUI now correctly finds its companion

src/testium/main_win/file_dialog.py

@@ -0,0 +1,21 @@
+"""Helpers for Qt file/directory dialogs.
+
+In Flatpak the native QFileDialog goes through the XDG document portal,
+which returns ``/run/user/UID/doc/.../<file>`` and only exposes the
+selected file — sibling files (param.yaml, scripts, recent paths in
+preferences, ...) are unreachable. Forcing Qt's own non-native dialog
+makes it walk the real filesystem mounted via ``--filesystem=home``
+and return a regular path.
+"""
+
+import os
+
+from PySide6.QtWidgets import QFileDialog
+
+
+def options():
+    """Default ``QFileDialog`` options for the current runtime."""
+    opts = QFileDialog.Options()
+    if os.path.isfile("/.flatpak-info"):
+        opts |= QFileDialog.Option.DontUseNativeDialog
+    return opts

src/testium/main_win/preference_win/preference_win.py

@@ -3,6 +3,7 @@ from PySide6.QtWidgets import QDialog, QFileDialog
 from PySide6.QtGui import QFont
 
 from main_win.preference_win.preference_core_win import Ui_preferenceWindow
+from main_win import file_dialog
 
 import interpreter.utils.settings as prefs
 
@@ -193,6 +194,7 @@ class PrefWindow(QDialog):
             self,
             caption="Select the default report directory",
             dir=self.ui.editDefaultReportPath.text(),
+            options=file_dialog.options(),
         )
         if path:
             self.ui.editDefaultReportPath.setText(path)
@@ -203,6 +205,7 @@ class PrefWindow(QDialog):
             self,
             caption="Select the default log directory",
             dir=self.ui.editDefaultLogPath.text(),
+            options=file_dialog.options(),
         )
         if path:
             self.ui.editDefaultLogPath.setText(path)
@@ -213,6 +216,7 @@ class PrefWindow(QDialog):
             self,
             caption="Select the python interpreter",
             dir=self.ui.editPythonPath.text(),
+            options=file_dialog.options(),
         )
         if path:
             self.ui.editPythonPath.setText(path)
@@ -220,7 +224,10 @@ class PrefWindow(QDialog):
     @Slot()
     def on_butLuaPath_pressed(self):
         path, _ = QFileDialog.getOpenFileName(
-            self, caption="Select the lua interpreter", dir=self.ui.editLuaPath.text()
+            self,
+            caption="Select the lua interpreter",
+            dir=self.ui.editLuaPath.text(),
+            options=file_dialog.options(),
         )
         if path:
             self.ui.editLuaPath.setText(path)

src/testium/main_win/test_file_manager.py

@@ -9,6 +9,7 @@ from PySide6.QtWidgets import QApplication, QFileDialog, QProgressDialog
 from interpreter.process import TestProcess
 from interpreter.utils.test_ctrl import TestSetController
 from main_win.test_controller_service import TestControllerService
+from main_win import file_dialog
 import interpreter.utils.settings as prefs
 from runtime.tum_except import ETUMFileError, ETUMRuntimeError
 
@@ -212,17 +213,9 @@ class TestFileManager:
         d = ""
         if w.testFile is not None:
             d = os.path.dirname(w.testFile)
-        # In Flatpak the native dialog goes through the XDG document portal,
-        # which returns /run/user/UID/doc/.../test.tum and only exposes the
-        # selected file — sibling files (param.yaml, .py, etc.) are unreachable.
-        # Force Qt's own dialog, which walks the real filesystem mounted via
-        # --filesystem=home and returns a regular path with sibling access.
-        options = QFileDialog.Options()
-        if os.path.isfile("/.flatpak-info"):
-            options |= QFileDialog.Option.DontUseNativeDialog
         file_name, _ = QFileDialog.getOpenFileName(
             w, "Open the test file", d,
-            "testium file (*.tum);;All Files (*)", options=options
+            "testium file (*.tum);;All Files (*)", options=file_dialog.options()
         )
         if file_name:
             self.reload(file_name)

src/testium/main_win/testium_win.py

@@ -37,6 +37,7 @@ from interpreter.utils.icons import icon_prefix
 
 from main_win.test_run.outlog import OutLog
 from main_win.test_run.test_run import ThreadTestStatus
+from main_win import file_dialog
 import interpreter.utils.settings as prefs
 from runtime.stdout_redirect import stdio_redir
 import api.testium as tm
@@ -484,7 +485,8 @@ class MainWindow(QMainWindow, Ui_MainWindow):
         else:
             initialPath = None
         fileName, _ = QFileDialog.getSaveFileName(
-            self, "Path to Log file", initialPath, "Log Files (*.log);;All Files (*)"
+            self, "Path to Log file", initialPath, "Log Files (*.log);;All Files (*)",
+            options=file_dialog.options(),
         )
         if fileName:
             shutil.copy(self.logFileName, fileName)
@@ -525,7 +527,8 @@ class MainWindow(QMainWindow, Ui_MainWindow):
         else:
             initialPath = None
         fileName, _ = QFileDialog.getSaveFileName(
-            self, "Path to log file", initialPath, "Log Files (*.log);;All Files (*)"
+            self, "Path to log file", initialPath, "Log Files (*.log);;All Files (*)",
+            options=file_dialog.options(),
         )
         if fileName:
             self.editLogFilePath.setText(fileName)