fix: allow terminal page to fill available space instead of using 100vh

- Change .terminal-page height from 100vh to 100% to fit within shell layout
- Add display: flex and min-height: 0 to .shell-content to allow flex children to expand
- Terminal container now properly fills available vertical space

apps/web/src/styles.css

@@ -166,6 +166,9 @@ a {
 .shell-content {
   padding: 1.25rem;
   overflow-x: hidden;
+  display: flex;
+  flex-direction: column;
+  min-height: 0;
 }
 
 .eyebrow {
@@ -2482,7 +2485,8 @@ a.nav-item,
 .terminal-page {
   display: flex;
   flex-direction: column;
-  height: 100vh;
+  height: 100%;
+  min-height: 0;
   padding: var(--space-4);
   gap: var(--space-4);
 }