Turn Production into a welcome dashboard with content activity

Greet the user by name, drop the development-phase strip, move three metric
cards (material in the Brain, content made, uploaded to the LMS) below the
knowledge graph, and add a content activity section with the latest and
in-progress results as Results cards that open their preview in place.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/components/AppLayout.tsx

@@ -174,11 +174,6 @@ export function AppLayout() {
             <LanguageSwitch />
           </div>
         </header>
-        <div className="demo-strip">
-          <Icon name="info" />
-          <span>{t('layout.devStrip')}</span>
-          <span className="demo-strip-tag">DEV</span>
-        </div>
         {/* Keyed by route so each page plays the fade-in from theme.css. */}
         <main tabIndex={-1} key={pathname}><Outlet /></main>
         <footer className="app-footer">Learning Lab Express <span>by Bawana</span><span>{t('layout.footer')}</span></footer>