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- palette-picker.js: drop the superseded APP/DOCS/INDEX copy tables, the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>

skill/scripts/palette.mjs

@@ -27,6 +27,8 @@
  */
 
 import crypto from 'node:crypto';
+import { realpathSync } from 'node:fs';
+import { resolve } from 'node:path';
 import { pathToFileURL } from 'node:url';
 
 // Seeds are inlined (129 entries, hand-curated via a tinder review of
@@ -500,7 +502,10 @@ function hueWord(H) {
 // no side effects.
 export { SEEDS };
 
-if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) {
+// argv[1] must be realpath'd: a skill installed via symlink makes argv[1]
+// the symlink path, which never equality-matches import.meta.url's realpath,
+// so the CLI would silently never run (same guard as visual-cues.mjs).
+if (process.argv[1] && import.meta.url === pathToFileURL(realpathSync(resolve(process.argv[1]))).href) {
 const args = parseArgs(process.argv.slice(2));
 const seed = pickSeed(SEEDS, args);
 const [L, C, H] = seed.oklch;