Open the systems-map gist dialog and turn the dock into a default-open TTY.

Plain node activation no longer navigates, case cards stay quiet evidence rows, and the terminal keeps one top-to-bottom scrollport.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/shared/case-study/case-study.html

@@ -10,6 +10,13 @@
     @if (caseStudy().transparencyNote; as note) {
       <p class="transparency" role="note">{{ note }}</p>
     }
+    @if (caseStudy().externalUrl; as url) {
+      <p>
+        <a class="external-link" [href]="url" rel="noopener noreferrer" target="_blank">
+          {{ caseStudy().externalLabel }}
+        </a>
+      </p>
+    }
   </header>
 
   <section class="stack" [attr.aria-labelledby]="caseStudy().id + '-situation'">