Release 3.1.0

Bug Fixes

• Fixed AttributeError crash when closing with unsaved changes — StateManager was calling self.save_project() instead
  of self.host.io_manager.save_project()
• Fixed projection mode always defaulting to Perspective — View3DManager used getattr(self, "settings", {}) which
  always returned {} instead of reading from init_manager.settings
• Fixed saving a user template (.pmetmplt) incorrectly clearing the project's unsaved-changes flag in both
  dialog_logic and user_template_dialog

Improvements

• SMILES, InChI, and MOL/SDF 2D imports now append to the existing editor instead of clearing it — new fragments are
  placed to the right of existing atoms with an 80 px gap, or at view center if the scene is empty
• Imports now push to the undo stack and mark the project as unsaved, making them fully undoable
• Refactored StringImporterManager to extract shared _placement_center, _place_mol_atoms, and _place_mol_bonds
  helpers, eliminating ~50 lines of duplication between SMILES and InChI paths

What's Changed

• 3.1.0 - Dev by @HiroYokoyama in #57

Full Changelog: 3.0.6...3.1.0

Release 3.0.6

• Fixed a bug in the 3D viewer mode that caused the zoom to reset when a selection was performed with the 3D edit tool.
• Added the --install-plugin option for CLI plugin install.

What's Changed

• 3.0.6 - Dev by @HiroYokoyama in #56

Full Changelog: 3.0.5...3.0.6

Release 3.0.5

• stabilized plugin file opener by double clicking
• added --version option

What's Changed

• 3.0.5 - Dev by @HiroYokoyama in #55

Full Changelog: 3.0.4...3.0.5

Release 3.0.4

• fixed default conversion setting to fallback
• fixed camera reset caused by the first switching style after pmeprj file load.

What's Changed

• 3.0.4 - Dev by @HiroYokoyama in #54

Full Changelog: 3.0.3...3.0.4

Release 3.0.3

• fixed the translation dialog functionality degradation

What's Changed

• 3.0.3 - Dev by @HiroYokoyama in #53

Full Changelog: 3.0.2...3.0.3

Release 3.0.2

What's Changed

• 3.0.2 - Dev by @HiroYokoyama in #52

Full Changelog: 3.0.1...3.0.2

Release 3.0.1

Several bugs related to the refactoring have been fixed.

• Resolved double drawing issue when toggling the model.
• Wireframe setting issue

What's Changed

• 3.0.1 - Dev by @HiroYokoyama in #50

Full Changelog: 3.0.0...3.0.1

Release 3.0.0

Core Architectural Refactor for Enhanced Maintainability

We have completed a comprehensive refactor of the core codebase. This update significantly improves code readability and long-term maintainability, providing a more robust foundation for future feature development and community contributions.

What's Changed

• Dev by @HiroYokoyama in #49

Full Changelog: 2.8.3...3.0.0

Pre-Release 3.0.0b1

Full Changelog: 3.0.0a7...3.0.0b1

Pre-Release 3.0.0a7

Full Changelog: 3.0.0a5...3.0.0a7