site: rename "finds" superpost collection to "bundles"

Disambiguates the one-letter `find` (item) vs `finds` (roundup) split that
kept causing confusion. Audience-facing now: `/bundles/<slug>/`, "Bundle"
labels in home/footer/search.

Internals: `getCollection('finds')` → `('bundles')`, `Entry.type 'finds'`
→ `'bundle'`, `OgFallback 'finds'` → `'bundles'`, `findListMosaic` →
`bundleMosaic`, `FindsPost` → `Bundle`, `findsReferencing` →
`bundlesReferencing`. Build script + generated mosaic dir follow
(`scripts/build-bundle-mosaics.mjs`, `src/generated/bundle-mosaics/`).

Skills `build-finds` → `build-bundle`, `cluster-finds` →
`cluster-bundles`. The `find` collection (individual items) is unchanged.

No URL redirects: low external-link surface area.

README.md

@@ -6,14 +6,14 @@ Built with [Astro](https://astro.build) + MDX.
 
 ## Key features
 
-- **Four-collection pipeline**: `find` (captured items, hidden from indexes), `finds` (editorial superposts that reference find slugs in a grid), `reviews` (full-length, sometimes graduated from a find), `posts` (generic essays)
-- **Daily capture skills** under `.claude/skills/`: `daily-finds` (sweeps every source in `sources.json`, writes one find file per qualifying item — capture-only, no editorial selection); `build-finds` (drafts a thematic superpost from the find pool); `build-review` (graduates a find to a full review, linking the two via `fromFind` / `promotedTo`)
+- **Four-collection pipeline**: `find` (captured items, hidden from indexes), `bundles` (editorial roundups that reference find slugs in a grid), `reviews` (full-length, sometimes graduated from a find), `posts` (generic essays)
+- **Daily capture skills** under `.claude/skills/`: `daily-finds` (sweeps every source in `sources.json`, writes one find file per qualifying item — capture-only, no editorial selection); `build-bundle` (drafts a thematic bundle from the find pool); `cluster-bundles` (batch-clusters the entire find pool into multiple bundles); `build-review` (graduates a find to a full review, linking the two via `fromFind` / `promotedTo`)
 - **Sources catalog** at `sources.json` with per-source fetch strategy (`webfetch` / `curl` / `skip`) and the `/sources` page rendering a 3-column card stream with a "Recent finds" sub-list per card
-- **Strict find visibility**: find items are reachable only via the superposts that reference them, the `/sources` cross-reference, or direct URL — they don't crowd the home feed, tag pages, or category pages
-- **Backlinks** computed at build time: each find page lists every superpost that references it; promoted finds show a forward link to the review; reviews show a "← First surfaced…" backlink to their originating find
+- **Strict find visibility**: find items are reachable only via the bundles that reference them, the `/sources` cross-reference, or direct URL — they don't crowd the home feed, tag pages, or category pages
+- **Backlinks** computed at build time: each find page lists every bundle that references it; promoted finds show a forward link to the review; reviews show a "← First surfaced…" backlink to their originating find
 - **Newspaper-style masthead** on every page: live entry-count + last-updated stats on the left, large serif "Unique" wordmark centered between thin rules, About/Blog nav on the right; per-page italic subheader ("A small log of delightful things.") with last-updated date on listing pages
 - **Pinterest-style home page**: hero card for the latest review plus a 3-column masonry grid of remaining reviews with a "Load more" reveal; old plain-list home preserved at `/index3/`
-- **Unified chronological feed** at `/index3/` across reviews + finds (superposts) + posts
+- **Unified chronological feed** at `/index3/` across reviews + bundles + posts
 - **SEO-friendly site footer** with Browse / Collections (live counts) / About link columns and a centered legal line; consistent 76rem page width across the entire site (article prose constrained to a comfortable reading measure inside the wider layout)
 - Reviews render as two-line index entries: bold name + muted subtitle (`Cotypist` / *Autocomplete that lives everywhere on your Mac*)
 - Auto-generated `/categories/<name>/` and `/tags/<name>/` listing pages — finds excluded by design
@@ -113,13 +113,13 @@ description: "Optional <meta> tag override."
 Body in markdown / MDX.
 ```
 
-The folder name becomes the URL at `/posts/<slug>/`. Drop any media (images, screenshots) next to `index.mdx` and reference them as `./image.png`. Same convention applies to the `find/` and `finds/` collections — each entry is a folder with `index.mdx` and any sibling media.
+The folder name becomes the URL at `/posts/<slug>/`. Drop any media (images, screenshots) next to `index.mdx` and reference them as `./image.png`. Same convention applies to the `find/` and `bundles/` collections — each entry is a folder with `index.mdx` and any sibling media.
 
 ## Project layout
 
 ```
 src/
-  content.config.ts          # collection schemas (reviews, posts, find, finds)
+  content.config.ts          # collection schemas (reviews, posts, find, bundles)
   content/
     reviews/<slug>/
       index.mdx              # article + frontmatter
@@ -128,7 +128,7 @@ src/
     find/<slug>/
       index.mdx
       hero.{jpg,png,gif,webp}  # auto-resolved by src/lib/find-hero.ts
-    finds/<slug>/index.mdx   # editorial superposts (text-only today)
+    bundles/<slug>/index.mdx # editorial roundups (text intro + grid)
     posts/<slug>/index.mdx   # essays
   lib/
     entries.ts               # getAllEntries() — unified feed across collections