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- palette-picker.js: drop the superseded APP/DOCS/INDEX copy tables, the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

@@ -375,7 +375,7 @@ if (hasFlag('start')) {
   const state = JSON.parse(fs.readFileSync(stateFile(key), 'utf8'));
   console.log(`QUESTION URL: ${state.url}`);
   console.log(`QUESTION KEY: ${key}`);
-  console.log('Open the URL for the user now: on Cursor with browser_navigate (the in-IDE browser), on another harness with its in-app browser tool, otherwise the system opener (macOS `open`, Linux `xdg-open`), otherwise show the URL.');
+  console.log('Open the URL for the user now: in-app browser when the harness has one, otherwise the system opener (macOS `open`, Linux `xdg-open`), otherwise show the URL.');
   console.log(`Then collect the answer with: node ${fileURLToPath(import.meta.url)} --wait --key ${key}`);
   process.exit(0);
 }