Replace portal sidebar brand text with Stirling Processor wordmark (#6978)

frontend/editor/src/portal/components/Sidebar.css

@@ -20,24 +20,13 @@
   border-bottom: 1px solid var(--color-sidebar-divider);
 }
 
-/* Stirling brand mark (theme-switched in Sidebar.tsx) + product wordmark */
-.portal-sidebar__brand {
-  display: inline-flex;
-  align-items: center;
-  gap: 0.4rem;
-}
-.portal-sidebar__brand-mark {
+/* Stirling Processor wordmark (theme-switched in Sidebar.tsx); matches the
+   editor's 22px wordmark so the two apps read as one brand. */
+.portal-sidebar__wordmark {
   height: 1.375rem;
   width: auto;
   display: block;
-}
-.portal-sidebar__logo-suffix {
-  font-family: var(--font-brand);
-  font-size: 1.0625rem;
-  font-weight: 700;
-  color: var(--color-text-1);
-  letter-spacing: 0.01em;
-  white-space: nowrap;
+  flex-shrink: 0;
 }
 
 /* App switcher (down-arrow → Portal / Editor); button and menu styling live

frontend/editor/src/portal/components/Sidebar.tsx

@@ -7,8 +7,8 @@ import { useTheme } from "@portal/contexts/ThemeContext";
 import { useUI } from "@portal/contexts/UIContext";
 import { LinkAccountFooterItem } from "@portal/components/LinkAccountFooterItem";
 import { EDITOR_URL, EDITOR_IS_SAME_APP } from "@portal/auth/editorUrl";
-import markLight from "@app/assets/brand/modern-logo/StirlingPDFLogoNoTextLight.svg";
-import markDark from "@app/assets/brand/modern-logo/StirlingPDFLogoNoTextDark.svg";
+import wordmarkLight from "@app/assets/brand/modern-logo/StirlingProcessorLogoBlackText.svg";
+import wordmarkDark from "@app/assets/brand/modern-logo/StirlingProcessorLogoWhiteText.svg";
 import { SettingsIcon } from "@portal/components/icons";
 import {
   GROUP_PRIMARY,
@@ -61,16 +61,11 @@ export function Sidebar() {
       aria-label={t("portal.shell.sidebar.primaryNav")}
     >
       <div className="portal-sidebar__logo">
-        <span className="portal-sidebar__brand">
-          <img
-            className="portal-sidebar__brand-mark"
-            src={theme === "dark" ? markDark : markLight}
-            alt="Stirling"
-          />
-          <span className="portal-sidebar__logo-suffix">
-            {t("portal.shell.sidebar.brandSuffix")}
-          </span>
-        </span>
+        <img
+          className="portal-sidebar__wordmark"
+          src={theme === "dark" ? wordmarkDark : wordmarkLight}
+          alt={t("portal.shell.sidebar.brandSuffix")}
+        />
 
         <AppSwitch
           className="portal-sidebar__app-switch"