Add live variant mode: element picker, action panel, poll/reply bridge (22 commands)

New feature: /impeccable live starts an interactive visual iteration server.
Users select elements in the browser, pick a design action (bolder, quieter,
etc.), and the agent generates HTML+CSS variants written directly to source.
The dev server's HMR hot-swaps them in, and MutationObserver progressively
reveals each variant in a cycler UI as it arrives.

Architecture:
- src/live/server.mjs: HTTP + WebSocket server with session token auth,
  long-poll /poll endpoint for the agent, WebSocket for the browser
- src/live/poll.mjs: CLI client (npx impeccable poll / poll --reply)
- src/live/browser.js: element picker with keyboard nav (arrows=siblings,
  shift+arrows=parent/child), action panel (12 commands, freeform input,
  variant count), variant cycler with progressive reveal via MutationObserver
- src/live/protocol.mjs: shared message types and event validation
- source/skills/impeccable/reference/live.md: agent loop instructions
  (inject script, poll loop, generate variants, accept/discard, cleanup)

CLI changes:
- bin/cli.js: added "poll" top-level command
- src/detect-antipatterns.mjs: liveCli() now delegates to src/live/server.mjs
- package.json: added ws dependency

Registered /impeccable live as command #22 across all standard locations.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/build-sub-pages.js

@@ -695,7 +695,7 @@ export async function generateSubPages(rootDir) {
     const html = renderPage({
       title: 'Docs | Impeccable',
       description:
-        '21 commands that teach your AI harness how to design. Browse by category: create, evaluate, refine, simplify, harden.',
+        '22 commands that teach your AI harness how to design. Browse by category: create, evaluate, refine, simplify, harden.',
       bodyHtml: wrapInDocsLayout(sidebar, main),
       activeNav: 'docs',
       canonicalPath: '/docs',

scripts/lib/sub-pages-data.js

@@ -72,6 +72,7 @@ const SKILL_CATEGORIES = {
   // SYSTEM - setup and tooling
   teach: 'system',
   extract: 'system',
+  live: 'system',
 };
 
 export const CATEGORY_ORDER = ['create', 'evaluate', 'refine', 'simplify', 'harden', 'system'];
@@ -130,6 +131,7 @@ export const COMMAND_RELATIONSHIPS = {
   // System
   teach: {},
   extract: {},
+  live: {},
 };
 
 /**