Trim dead code and tighten the branch to surgical scope

- palette-picker.js: drop the superseded APP/DOCS/INDEX copy tables, the
  disabled font-rail hoist machinery, LOREM.caption, and an orphan marker
- design-context.css + dcx-hierarchy.css: drop the demo-era specimen,
  radius, and spacing-bar rule groups nothing renders
- index.astro: drop an unreferenced boards const
- de-export module-internal names (store, bindings, portability,
  visual-cues); remove picker-server's unused doc-session kill switch and
  document --doc in its help
- palette.mjs: realpath the entry guard so symlinked installs still run
  the CLI (same guard as visual-cues.mjs)
- revert serve-question.mjs copy ride-along; drop the plan/ gitignore
  entry; dedupe a build-picker comment; file design-context with the
  system category entries; alphabetize IMPECCABLE_SUB_COMMANDS
- new-work.md: drop a same-screen restatement of the comp/world ranking
- CLAUDE.md: correct the picker gate baseline to the measured 606 and
  explain the per-element multiplication; the trims removed the two
  dead-block font findings
- DESIGN-CONTEXT-ARCHITECTURE.md: list portability.mjs in the code layout

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

scripts/build-picker.mjs

@@ -11,8 +11,6 @@ const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..');
 const buildDir = path.join(root, 'build-picker');
 const outputDir = path.join(root, 'skill/scripts/picker');
 // Static assets vendored under picker/assets/ (the site now lives in the
-// private impeccable-site repo, so the picker carries its own copies).
-// Static assets vendored under picker/assets/ (the site now lives in the
 // private impeccable-site repo, so the picker carries its own copies). These
 // are referenced from markup at runtime, so Vite never sees them.
 const assetsSource = path.join(root, 'picker/assets');