feat: add verified facts, licensed textures and an original portrait

Content: new Origin story, The look and Beyond the series sections, plus
expanded relationships and gated arc detail. Two claims that had been
omitted as disputed are now settled and restored — the October 10
birthday, corroborated by the creator's own birthday artwork, and the
English voice credit. Height added. Age is shown as "28-29 — sources
differ" rather than silently picking a side.

Artwork: the abstract hero silhouette becomes a hand-plotted SVG
portrait whose fills read custom properties, so one drawing re-colours
itself for the manga and anime palettes in The look. Still no image file
of the character — the series is copyrighted, and that does not change
because a picture is redrawn or relicensed.

Textures: three licensed photographic backdrops, one CC0 and two under
the Unsplash License, each credited in the footer with author and
source. Two more were sourced and dropped: their seamless tiles read as
repeating ornament once the blend actually worked. Blending is `screen`
rather than `soft-light`, which collapses toward the backdrop on a
near-black palette and rendered four of the five invisible.

Contrast: magenta text moves to its own lighter token so every textured
surface can carry visible grain and still clear 5:1 on small type. Page
floor is 5.44:1, measured from rendered pixels.

Also: drop background-attachment parallax that cost dropped frames,
stop publishing internal working notes to the live site, add a LICENSE
scoped to exclude the series and the third-party textures, and correct
the artwork-provenance claims now that the page uses photographs.

.github/workflows/deploy-pages.yml

@@ -29,10 +29,18 @@ jobs:
       - name: Setup Pages
         uses: actions/configure-pages@v5
 
+      # plans/ holds internal working notes. Publishing the repo root would
+      # serve them at /plans/reports/..., so stage only what the site needs.
+      - name: Stage site files
+        run: |
+          mkdir -p _site
+          cp index.html README.md LICENSE .nojekyll _site/
+          cp -r css js assets _site/
+
       - name: Upload site artifact
         uses: actions/upload-pages-artifact@v3
         with:
-          path: .
+          path: _site
 
       - name: Deploy
         id: deployment