complate simple todo app (#1620)

Co-authored-by: Efe Başlılar <[email protected]>
Co-authored-by: Priyankar Pal <[email protected]>

Author: 3 people

src/plays/simple-todo-app/Readme.md

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+# Simple Todo App
+
+A productivity-focused Todo app built with React + TypeScript. Capture tasks, keep them synced with local storage, edit inline, filter by status, and use bulk actions to stay tidy.
+
+## Play Demographic
+
+- Language: ts
+- Level: Beginner
+
+## Creator Information
+
+- User: efebaslilar
+- Gihub Link: https://github.com/efebaslilar
+- Blog: 
+- Video: 
+
+## Implementation Details
+
+- Core state is handled with `useState`, fed by a lazy initializer that restores the last session from `localStorage`, falling back to seed data for new visitors.
+- `useMemo` derives the filtered + sorted list, overall stats, and completion ratios without recomputing on every render.
+- Inline editing keeps focus management tight via refs, keyboard shortcuts (Enter to save, Esc to cancel), and blur handling to commit changes.
+- Bulk controls (mark all, clear completed, clear all) provide quick-maintenance options that stay disabled until relevant, keeping the UI calm.
+- Styling focuses on approachability with card-like elevation, responsive grid tooling, and subtle affordances for hover/focus states.
+
+## Consideration
+
+- Because todos persist locally, clearing the browser’s storage (or the “Clear all” action) is the quickest way to start fresh.
+- The seed data auto-populates for newcomers; subsequent visits will hydrate from the saved list instead.
+
+## Resources
+
+- [React Docs – Synchronizing with Effects](https://react.dev/learn/synchronizing-with-effects)
+- [MDN – KeyboardEvent reference](https://developer.mozilla.org/docs/Web/API/KeyboardEvent)