Problem Solving & Design B+

The app is thoughtfully designed with a warm visual language, accessible form structure, responsive layout, and considerate empty and loading states throughout.

• +The color swatch dynamically computes readable foreground ink based on luminance, ensuring quantity and hex labels remain legible against any chosen color.
• +Both a truly-empty stash and a filtered-to-zero state each render a distinct message and contextual call-to-action button.
• +A skip-link and aria-live regions on the banner, toast, and main wall give keyboard and screen-reader users meaningful navigation and announcements.
• +The layout shifts from a two-column sidebar+grid arrangement to a single stacked column at 860 px, keeping the form accessible on tablet widths.

Completeness A

All brief features are implemented end-to-end, with localStorage persistence, card grid, deletion, and weight filtering all working; the one gap is that storage-write failures are not surfaced visibly to the user.

• +The two-step delete flow arms a confirmation state before committing, preventing accidental data loss.
• +Corrupt localStorage entries are recovered gracefully, with a count of skipped rows shown in a banner.
• +The filter dropdown is dynamically populated from actual weight values in the stash and resets to 'all' when the active filter disappears.
• -When saveEntries returns ok:false (e.g. quota exceeded), the store does not update its in-memory list, so the card the user just added never appears — the failure is silent from the user's perspective because no banner or toast is shown on…
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Technical Craft A

The codebase is cleanly modularised into typed units with pure transform functions, a StorageLike abstraction enabling full unit-test coverage, and a vitest suite that exercises validation, storage, store mutations, and filtering.

• +Pure addEntry and removeEntry functions never mutate their source arrays, making them straightforwardly testable and safe to compose.
• +The StorageLike interface decouples storage logic from the browser API, allowing tests to inject an in-memory implementation without mocking globals.
• +normalizeStored validates every field of a persisted row against the same constants used at input time, preventing schema drift between write and read paths.
• +The prefers-reduced-motion media query suppresses both CSS animations and the artificial boot delay, respecting user accessibility preferences at the JS layer too.