This PR turns the project from a "cool demo" into something I’m genuinely proud to ship as course material. Every change has one goal: make everything fast, reliable, and a joy to work with.

The core engine (Reactisma)

• Faster updates with proper cleanup when things unmount
• Smarter useState that avoids unnecessary re‑renders
• Events are handled cleanly, one listener per event type per root
• Smooth scheduling so animations and typing don’t stutter
• Suspense & lazy loading work without breaking
• Server rendering and hydration, plus critical CSS extraction
• A dev tools overlay that shows the real component tree
• All the hooks you expect: state, ref, effects, context, transitions, etc., plus an error boundary helper

Styled components

• Fully typed components, autocomplete just works
• CSS parser that handles nesting, pseudo‑selectors, @media, @keyframes, and more
• Efficient style injection, rules are tracked and cleaned up properly
• Theme support, global styles, attrs, and the as prop
• Works with server rendering (no broken styles)

The neural network (emotional memory)

• Fast number crunching with zero wasted memory during training
• Smart initialization, solid training algorithm with Adam and dropout
• Runs in a background worker, the UI never freezes
• Emotional memory uses a clever index for quick lookups
• Saves to IndexedDB (migrates from old localStorage)
• Ready to switch to WebAssembly for even more speed later

Tooling & docs

• Tests added for all critical parts
• Type checking passes everywhere
• Code formatting and git setup are consistent
• Basic GitHub Actions, contribution guide, docs folder.