fix(ui): remove addStretch from auth panel, use compact size policy

Replace layout.addStretch() with QSizePolicy.Maximum so the
Database Auth dock panel only takes the height its content needs,
leaving more vertical space for the Database Activity panel below.

Closes #190

freecad/silo_commands.py

@@ -2667,7 +2667,11 @@ class SiloAuthDockWidget:
         btn_row.addWidget(settings_btn)
 
         layout.addLayout(btn_row)
-        layout.addStretch()
+
+        # Keep the auth panel compact so the Activity panel below gets more space
+        self.widget.setSizePolicy(
+            QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Maximum
+        )
 
     # -- Status refresh -----------------------------------------------------