Reconcile questionnaire branch with main's site split and redesign

Post-rebase repairs after main moved 226 commits (site/ split to the
private impeccable-site repo, DESIGN.md spec now eight sections, register
extraction replaced by extractSectionValue, seed mode rewritten):

- document.md: transplant this branch's seed pipeline (assets, interview,
  visual cues, picker) onto main's rewritten file; adopt the canonical
  section vocabulary. The interplay with new-work's workshop is left for
  PR review.
- picker: vendor kinpaku tokens/kit CSS, hero art, and favicon under
  picker/ (site/ no longer exists here); drop the sharp resize step and
  ship the compressed JPEG directly; declare astro/sharp-free deps.
- picker-server: read the register via extractSectionValue('Register')
  since extractRegister is gone from context.mjs.
- palette.mjs / utils.js / test-suites.mjs / package.json / release.mjs:
  rebuild as main's version plus this branch's additions, undoing hunks
  the -X theirs replay had clobbered.
- craft.md / shape.md: reset to main (this branch's net change was zero).
- progress bar: animate transform instead of width (design hook finding).

Validation: bun run build green (prose validators clean), bun run test
198/198, picker-server suite 7/7.

AI-assisted (agent-implemented, maintainer-directed).

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -43,9 +43,8 @@
     "build:picker": "node scripts/build-picker.mjs",
     "build:skills": "bun run scripts/build.js --skip-root-sync",
     "build:skills:release": "bun run scripts/build.js",
-    "build:site": "npx astro build",
-    "build": "bun run build:picker && bun run build:skills && bun run build:site && cp -R dist build/_data/dist",
-    "build:release": "bun run build:picker && bun run build:skills:release && bun run build:site && cp -R dist build/_data/dist",
+    "build": "bun run build:picker && bun run build:skills && mkdir -p build/_data && rm -rf build/_data/dist && cp -R dist build/_data/dist",
+    "build:release": "bun run build:picker && bun run build:skills:release && mkdir -p build/_data && rm -rf build/_data/dist && cp -R dist build/_data/dist",
     "build:browser": "node scripts/build-browser-detector.js",
     "build:extension": "node scripts/build-extension.js",
     "clean": "rm -rf dist build",
@@ -95,6 +94,7 @@
     "@babel/parser": "^8.0.4",
     "ai": "^7.0.14",
     "archiver": "^8.0.0",
+    "astro": "^7.0.0",
     "playwright": "^1.59.1",
     "svelte": "^5",
     "zod": "^4.3.6"