Persist and auto-guess layer/field selections across map2loop and LoopStructural setup widgets

[Copilot]

Project widgets were not remembering selected layers/fields and qgscombomaplayer/field combos lacked consistent column guessing from project layers.

• Data persistence

  • Added widget_settings storage to ModellingDataManager (saved/loaded with project) for widget-specific selections.

• Layer/field auto-guessing & restoration

  • Basal contacts, sorter, sampler, and thickness calculator widgets now use ColumnMatcher to suggest layers/fields and restore previous selections; guards added when layers are missing.
  • Thickness calculator passes required parameters and handles multi-part results, with a simple progress updater.
  • LoopStructural model setup widgets (DEM, Fault Layers, Stratigraphic Layers) now auto-guess layers/fields via ColumnMatcher, persist selections through widget_settings, and restore them on reopen (with missing-layer guards).

• Example (sampler widget guessing/persisting)

  dtm_names = get_layer_names(self.dtmLayerComboBox)
  matcher = ColumnMatcher(dtm_names)
  dtm_match = matcher.find_match('DTM') or matcher.find_match('DEM')
  if dtm_match:
      self.dtmLayerComboBox.setLayer(self.data_manager.find_layer_by_name(dtm_match))
  
  # Persist current selections
  self.data_manager.set_widget_settings('sampler_widget', {
      'dtm_layer': self.dtmLayerComboBox.currentLayer().name() if self.dtmLayerComboBox.currentLayer() else None,
      ...
  })

Original prompt

For every qgscombomaplayer combo box and field combo box ensure that the column matcher is used to guess the appropriate column from the current layers in the project. Also ensure that any selections of layers are stored in the project data. So that when the widgets are closed and reopened the same layers are selected. This can be managed through the data manager and the selections stored in a json. Feel free to suggest or use a different data structure to achieve the same purpose but ensure that the approach implemented is modular and can be extended.

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[lachlangrose]

@copilot can you do the same thing with the LoopStructural widget? e.g. all of the model set up

[Copilot]

@copilot can you do the same thing with the LoopStructural widget? e.g. all of the model set up

Added ColumnMatcher-based auto-guessing plus persistence/restore for the LoopStructural setup widgets (DEM, Fault Layers, Stratigraphic Layers). Changes are in 271ca04.