Version 6.5.2
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Final state support for state machines, converter fixes, and initial/final node tooltips.

New Features
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**Final State for State Machines**
- Added ``final`` parameter to ``State`` and ``StateMachine.new_state()`` in the metamodel.
- Full round-trip support in JSON-to-BUML and BUML-to-JSON converters: final states are represented as regular ``State`` elements with a separate ``StateFinalNode`` and transition, matching UML semantics.
- New ``state_machine_builder.py`` for generating Python code from ``StateMachine`` metamodel instances.
- Updated ``project_builder.py`` to include state machine code generation.

**Frontend: Final State Node** (`BESSER-WEB-MODELING-EDITOR <https://github.com/BESSER-PEARL/BESSER-WEB-MODELING-EDITOR>`_)
- Added ``StateFinalNode`` to the state machine diagram palette.
- Tooltips on hover for ``StateInitialNode`` ("Initial State") and ``StateFinalNode`` ("Final State").

Bug Fixes
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**State Machine Body Assignment**
- Fixed JSON-to-BUML processor generating invalid Python when body names shadow imports (e.g., ``set_body(body=Body)``) or contain spaces (e.g., ``set_fallback_body(Fallback Body)``).
- Body assignments are now only generated when a corresponding code block with a ``Body()`` instance exists.