feat: establish GeoIntel and ITWorx branding

frontend/src/styles/atlas-premium-v2.css

@@ -74,6 +74,8 @@ body {
 /* Brand rail */
 
 .workbench-sidebar {
+  display: flex;
+  flex-direction: column;
   border: 0;
   padding: 1rem 0.85rem 1.25rem;
   color: rgba(255, 255, 255, 0.76);
@@ -100,13 +102,42 @@ body {
   height: 2.65rem;
   border: 1px solid rgba(173, 238, 227, 0.44);
   border-radius: 0.8rem;
-  color: #dffaf5;
-  background: rgba(255, 255, 255, 0.09);
+  object-fit: cover;
   box-shadow:
     inset 0 1px 0 rgba(255, 255, 255, 0.14),
     0 10px 24px rgba(0, 0, 0, 0.16);
 }
 
+.workbench-sidebar > nav {
+  flex: 1 1 auto;
+}
+
+.itworx-signature {
+  display: grid;
+  gap: 0.38rem;
+}
+
+.itworx-signature > span {
+  color: rgba(223, 250, 245, 0.48);
+  font-size: 0.58rem;
+  font-weight: 700;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+}
+
+.itworx-signature img {
+  display: block;
+  width: 7.4rem;
+  height: auto;
+}
+
+.workbench-sidebar > .itworx-signature {
+  margin: 1.25rem 0.45rem 0;
+  border-top: 1px solid rgba(255, 255, 255, 0.09);
+  padding-top: 1rem;
+  opacity: 0.88;
+}
+
 .sidebar-brand-copy {
   display: grid;
   gap: 0.12rem;