Problem Solving & Design B

The app covers every brief requirement with thoughtful UX touches — inline delete confirmation, arrow-key rating, and a cozy warm aesthetic — and the data model is well-considered.

• +Clicking the currently-selected rating flame clears it back to unrated, making the rating genuinely optional without a separate control.
• +The rating widget is keyboard-operable via arrow keys following the WAI-ARIA radiogroup pattern, with roving tabIndex managed on each render.
• +Cards for burning candles receive a radial amber glow and a flickering animation, reinforcing the warm aesthetic the brief asked for.
• +Scent notes are deduplicated case-insensitively on input, so entering 'Cedar, cedar' stores only one chip.

Completeness A

All core features are present and wired end-to-end; the one gap is that form validation errors are shown inline but storage failures are not surfaced as visible user-facing messages in the expected sense.

• +The summary bar tracks total, Burning, Finished, and average rating in a single pass, updating live after every add, edit, or delete.
• +The empty state renders a dedicated panel with a call-to-action button when no candles exist, and hides it the moment any entry is added.
• +Deletion uses an inline confirmation panel on the card rather than a blocking browser dialog, keeping the user in context.
• -Storage save failures are reported only via a dismissible banner; there is no persistent or prominent error state, so a user who dismisses the banner loses the warning that their data was not saved.
• -The `errors surfaced to the user` practice is absent: validation errors appear on form fields, but there is no mechanism to surface runtime errors (e.g. a failed load) beyond the single dismissible banner.

Technical Craft B

The codebase is cleanly modularised with pure reducers, injected dependencies, defensive storage parsing, and automated tests — the only notable absence is explicit type definitions.

• +Storage parsing is per-entry: corrupt or missing rows are dropped individually via normalizeCandle returning null, so one bad entry cannot wipe the whole collection.
• +All user-supplied strings are assigned via textContent in render.js, structurally preventing XSS without relying on escaping.
• +The store module exports pure reducer functions that return new arrays and never mutate, making each state transition directly assertable in tests.
• +The test suite covers storage round-trips, corrupt-data recovery, prototype-pollution resistance, and store reducer identity guarantees using only Node's built-in test runner.
• -There are no explicit type definitions, interfaces, or JSDoc type annotations anywhere in the source; all function signatures and data shapes are implicit.