Reading map: a 3D hero of everything read, traced by what I highlighted

An orbiting point cloud of all 8,424 indexed passages, with the 262 highlighted
ones lit and threaded in the order they were marked. Data comes from library-rag
(chunks + embeddings) projected to 3D with UMAP; the page never touches Postgres.

Projection is `airy` (n_neighbors=50, min_dist=0.8) and the palette is `frost` --
both chosen by eye against the alternatives. Note that airy shows the underlying
book-territory structure LESS than the tight projection the pre-flight measured,
so the 0.805 k-NN purity figure describes that one, not this.

Page weight: the wrapper adds 321 B gzip to the homepage's blocking load. `three`
(127 KB gz) and the payload (56 KB gz) are a dynamic chunk fetched after render.
It fails closed -- no WebGL, no payload, or a dead fetch leaves a plain page.

The payload is a static snapshot; the 5-minute auto-build rebuilds the site, not
the data. New reading reaches this map only when export.py is re-run.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

package-lock.json

@@ -17,6 +17,7 @@
         "rehype-katex": "^7.0.0",
         "remark-math": "^6.0.0",
         "satori": "^0.28.2",
+        "three": "^0.185.1",
         "unist-util-visit": "^5.0.0"
       }
     },
@@ -6018,6 +6019,12 @@
         "node": ">=16"
       }
     },
+    "node_modules/three": {
+      "version": "0.185.1",
+      "resolved": "https://registry.npmjs.org/three/-/three-0.185.1.tgz",
+      "integrity": "sha512-5aojFCXKwnjBRZvUnt3WFfEcvUJgkN5LlijRFN95hMy8WVkG4I0QNcJE+OuWvuJ0bOdStrbfXn0pkd6/QyiAlg==",
+      "license": "MIT"
+    },
     "node_modules/tiny-inflate": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/tiny-inflate/-/tiny-inflate-1.0.3.tgz",