Remove completed todo.md + html-css-foundation mockups; strip dead §N phase refs from comments/docs (simplify visual E2E to drop the mockup-comparison oracle)

views/partials/shell.ejs

@@ -1,6 +1,6 @@
 <%#
   App shell: sidebar (brand + nav slot + footer) · topbar · content slot. The one chrome every page
-  renders (§10) — dashboard, admin, plugin, login/registration/front — so the menu is identical
+  renders — dashboard, admin, plugin, login/registration/front — so the menu is identical
   everywhere, role-filtered to the visitor (anonymous ⇒ public items + Sign in).
   Slots are pre-rendered HTML locals — `nav` (sidebar tree, see nav-tree partial),
   `actions` (topbar buttons), `body` (page content); `styles` is an optional array of
@@ -9,7 +9,7 @@
   (the <title> tag; defaults to title or the brand), `brand` ({ name, logo?, sub? }), `theme`
   (theme-switch default), `user`, `breadcrumbs`, `csrfToken` (the Sign-out form's hidden field),
   `signInHref` (anonymous "Sign in" target; default /login). `menu` (default true) — set false to
-  drop the sidebar and render a focused single-column page (§10).
+  drop the sidebar and render a focused single-column page.
 %><%
   const brand = locals.brand || { name: "Plainpages" };
   const title = locals.title || ""; // topbar heading; empty ⇒ no topbar <h1> (the body owns it)
@@ -76,7 +76,7 @@
               </div>
             </details>
             <% } else if (!hideSignIn) { %>
-            <%# anonymous (a public page in the shell, §10): no session to end — offer a way in instead.
+            <%# anonymous (a public page in the shell): no session to end — offer a way in instead.
                 signInHref carries this page as return_to (chrome.signInHref); falls back to bare /login.
                 Suppressed on the auth pages themselves (hideSignIn) — a Sign-in there only loops back. %>
             <a class="btn btn-primary" href="<%= locals.signInHref || '/login' %>" style="flex:1 1 auto"><svg class="ico ico-sm" aria-hidden="true"><use href="#i-user" /></svg>Sign in</a>