You're a crafter with a growing pile of yarn skeins stuffed in bags, bins, and baskets — and you keep buying duplicates because you can't remember what you own. Build a single-page **Yarn Stash Tracker** app that lets you catalog every skein in your collection.

Each entry should capture: **yarn name**, **brand**, **weight** (lace, fingering, DK, worsted, bulky, etc.), **fiber content** (e.g. 100% merino, wool/acrylic blend), **color name**, **yardage**, **quantity** (number of skeins), and an optional **notes** field (e.g. "earmarked for hat project").

Users should be able to:
- **Add** new yarn entries via a form
- **View** all entries in a browsable card or list layout that shows key details at a glance
- **Delete** entries they've used up or gifted away
- **Filter or search** by weight or fiber content to quickly find what's on hand

All data must persist in **localStorage** so the stash survives a page refresh. The UI should feel warm and crafty — think soft colors, maybe a wool-ball icon or two — but functionality comes first. No backend, no login, no external APIs required.