[Enhancement]: General refactor and code cleanup #71
Description
Is your feature request related to a problem?
This task represents a planned and expected phase in the lifecycle of the prototype. Early development prioritized speed and exploration; a dedicated cleanup and refactoring pass is now appropriate to consolidate what has been learned and prepare the codebase for continued development.
Describe the solution you'd like
Perform a comprehensive code cleanup and refactoring pass focused on correctness, clarity, and long-term maintainability, without changing user-facing behavior.
The goal is to establish a clean, stable foundation that supports ongoing feature development and onboarding.
Describe alternatives you've considered
- Performing only opportunistic cleanup alongside feature work, which risks leaving structural issues partially addressed
- Deferring cleanup until later stages, which would increase the cost and risk of refactoring as the codebase grows
Additional context
This is a non-feature refactoring task. Functional behavior should remain unchanged, but internal structure may change substantially to reflect current understanding of the system and to improve long-term sustainability.