Add live bundle analyzer page to sx-docs

Demonstrates Phase 1 dep analysis in action: computes per-page component
bundles for all sx-docs pages using the deps.sx transitive closure
algorithm, showing needed vs total components with visual progress bars.

- New page at /plans/bundle-analyzer with Python data helper
- New components: ~bundle-analyzer-content, ~analyzer-stat, ~analyzer-row
- Linked from Phase 1 section and Plans nav
- Added sx/sx/ to tailwind content paths

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

shared/static/styles/tailwind.config.js

@@ -31,6 +31,7 @@ module.exports = {
     '/root/rose-ash/federation/sx/sx_components.py',
     '/root/rose-ash/account/sx/sx_components.py',
     '/root/rose-ash/orders/sx/sx_components.py',
+    '/root/rose-ash/sx/sx/**/*.sx',
     '/root/rose-ash/sx/sxc/**/*.sx',
     '/root/rose-ash/sx/sxc/sx_components.py',
     '/root/rose-ash/sx/content/highlight.py',