Place OS version badge inline right after the Hub title

Mirrors the service modal pattern where the version badge sits to the
right of the title: .title-group switches from a centered column
(badge under the title, PR #377) to a centered row with the badge
vertically centered directly after "Sovran_SystemsOS Hub".

flex-wrap keeps a graceful fallback: on very narrow screens the badge
wraps below the title, centered — the previous stacked look.

Co-authored-by: arena-agent <297053741+arena-agent@users.noreply.github.com>

app/sovran_systemsos_web/static/css/header.css

@@ -31,10 +31,11 @@
 
 .title-group {
   display: flex;
-  flex-direction: column;
+  flex-direction: row;
+  flex-wrap: wrap;
   align-items: center;
   justify-content: center;
-  gap: 6px;
+  gap: 6px 10px;
 }
 
 .header-buttons {
@@ -53,7 +54,8 @@
   letter-spacing: 0.03em;
 }
 
-/* ── OS Version Badge (polished) ───────────────────────────────── */
+/* ── OS Version Badge (inline, right after "Hub" in the title ────
+   ── mirrors the version badge next to modal titles) ────────────── */
 .os-version-badge {
   display: inline-flex;
   align-items: center;
@@ -67,7 +69,7 @@
   box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
   transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
   white-space: nowrap;
-  align-self: center;
+  flex-shrink: 0;
 }
 
 .os-version-badge:hover {