Redirect the other www spelling to SITE_ORIGIN, hold roles to the role help and fix the audit findings

SITE_ORIGIN alone decides whether the site is www or not: CanonicalHostSubscriber
sends the other spelling there with 301, cms:site:origin writes the setting, the
system screen shows it. The roles now match the role help (editor: drafts,
publisher: live content, admin: design, settings, users, system). The installer no
longer reopens on an unreachable database, the session cookie follows ADMIN_PATH,
percent-encoded credentials no longer break the container, consent only accepts
same-site decisions, JSON-LD is HTML-safe, own CSS stays in its block, plus the
editor, updater, download and public-output findings from the full review
(ADR 099, ADR 100).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

public/assets/rich-text.js

@@ -39,7 +39,7 @@ function button(label, title, onClick, className = 'rt-button') {
  * Builds the control. `apply` is called with the markup whenever it changes; the caller decides
  * what to do with it (history entry, preview refresh).
  */
-export function createRichText(value, apply, { label = 'Text' } = {}) {
+export function createRichText(value, apply, { label = 'Text', plain = false } = {}) {
   const wrap = document.createElement('div');
   wrap.className = 'rich-text';
 
@@ -55,13 +55,16 @@ export function createRichText(value, apply, { label = 'Text' } = {}) {
   surface.setAttribute('role', 'textbox');
   surface.setAttribute('aria-multiline', 'true');
   surface.setAttribute('aria-label', label);
-  surface.innerHTML = value ?? '';
+  // Unter Schema v12 ist der Text Klartext: "Preis <b>5 Euro</b>" ist dann eine Zeichenfolge, kein
+  // Markup, und darf beim Oeffnen nicht als HTML gelesen werden.
+  if (plain) surface.textContent = value ?? '';
+  else surface.innerHTML = value ?? '';
 
   const source = document.createElement('textarea');
   source.className = 'rt-source';
   source.hidden = true;
   source.setAttribute('aria-label', `${label} als HTML`);
-  source.value = value ?? '';
+  source.value = plain ? surface.innerHTML : (value ?? '');
 
   const push = markup => { source.value = markup; apply(markup); };