site: editorial tooling, grid masonry fix, new reviews + finds

UI / dev tooling
- /find/ index: sort by file birthtime desc (sub-day chronology even when
  many finds share the same frontmatter date); render the captured-at on
  its own line under the host (~0.65rem mono muted)
- New dev-only filter at the top of /find/: All / Not in lists, persisted
  in localStorage; "not in lists" hides finds referenced by any superpost
- New editorial-tags chip strip on each find card (dev-only): selected
  tags visible by default, full picker on hover/focus-within with a "…"
  button for arbitrary tag entry; clicks copy /edit-find-tag <slug> <tag>
  to the clipboard via the existing EditConfirm singleton
- New optional editorialTags: string[] field on the find collection
- New src/data/editorial-tags.json — master list of available tags (initial
  set: ["delete"]); display order follows file order

/grid/ now uses the JS Masonry component instead of CSS column-count, so
the middle column no longer "dips"; tile hover updated to match the home
page's accent-glow / no-translate style

Content
- New review: apex-markdown-processor (graduated from find of same slug;
  hero reused from the find folder)
- New review: sindre-sorhus-older-mac-apps (graduated; intentionally
  hero-less per the source page's text-only design)
- New review: superkey (added by user; hero wired in src/lib/hero.ts)
- 24 new finds captured by /daily-finds across travel, jokes, quotes,
  product picks, and indie tools
- 2 new finds superposts: 2026-05-04-a-small-atlas, 2026-05-04-off-until-needed

Misc
- daily-finds.log.md and candidate-sources.md updated with the day's runs
- build-finds skill prompt iterated by user

candidate-sources.md

@@ -2,6 +2,11 @@
 
 Newly nominated sources awaiting review before promotion to `sources.json`. Each entry says where it came from and the case for adding it. Vet manually, then move to the main list.
 
+## 2026-05-04
+
+- **Tokyo Paladin** — https://tokyopaladin.substack.com/ — surfaced via Daring Fireball Linked List crediting their post on Noir, the Yamazaki "Japanese Oreo." Substack focused on Japanese consumer products and cultural curiosities, in the vein of "things you can only buy in Japan that quietly outclass their global competitors." Substack feed should be curl-friendly via the standard `/feed` pattern. Strong candidate for the gifts and general-delight buckets.
+- **PetaPixel** — https://petapixel.com/ — surfaced via Kottke link to NASA's Artemis II photo dump. Long-running photography publication; coverage spans gear, photo essays, and historical archives — overlaps general-delight (photo finds) more than tools. WebFetch-friendly historically. Vet for noise-vs-signal across topics before adding.
+
 ## 2026-05-03
 
 - **Robin Good's "Best Curated Newsletters"** — https://robingood.substack.com/ — surfaced via WebSearch. Annual list of curated newsletters; less a daily-find source than a yearly source-of-sources to scan once and harvest. Worth checking the most recent edition for newsletters in our brief that we don't yet track.