Match OS version badge styling to service modal version badges

The header badge now uses the exact visual treatment of
.creds-title-version-badge from modals.css: neutral translucent pill
(rgba(255,255,255,0.06) background, 0.08 white border, 12px radius,
--text-secondary text, 0.72rem/600/2px-10px padding), no hover
animation, and a bare version number like the modals show (e.g.
"2.8.4") instead of the green pill with a "v" prefix.

The badge markup flattens to a single text span; the .version-label
and .version-number rules are removed.

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

app/sovran_systemsos_web/static/css/header.css

@@ -54,45 +54,23 @@
   letter-spacing: 0.03em;
 }
 
-/* ── OS Version Badge (inline, right after "Hub" in the title ────
-   ── mirrors the version badge next to modal titles) ────────────── */
+/* ── OS Version Badge — identical styling to the version badge ────
+   ── shown next to titles in the service modal windows ──────────── */
 .os-version-badge {
+  background-color: rgba(255, 255, 255, 0.06);
+  color: var(--text-secondary);
+  font-size: 0.72rem;
+  font-weight: 600;
+  padding: 2px 10px;
+  border-radius: 12px;
+  border: 1px solid rgba(255, 255, 255, 0.08);
+  letter-spacing: 0.02em;
   display: inline-flex;
   align-items: center;
-  background: linear-gradient(145deg, #1a2a22, #0f1a15);
-  border: 1px solid rgba(74, 222, 128, 0.25);
-  border-radius: 9999px;
-  padding: 2px 14px 2px 10px;
-  font-size: 0.75rem;
-  font-weight: 600;
-  color: #4ade80;
-  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;
   flex-shrink: 0;
 }
 
-.os-version-badge:hover {
-  border-color: rgba(74, 222, 128, 0.45);
-  box-shadow: 0 4px 8px rgba(74, 222, 128, 0.15);
-  transform: translateY(-1px);
-}
-
-.os-version-badge .version-label {
-  font-size: 0.68rem;
-  font-weight: 500;
-  color: #4ade80;
-  opacity: 0.85;
-  margin-right: 2px;
-}
-
-.os-version-badge .version-number {
-  font-family: 'JetBrains Mono', 'Fira Code', monospace;
-  font-weight: 700;
-  letter-spacing: 0.5px;
-  color: #86efac;
-}
-
 /* ── IP bar ─────────────────────────────────────────────────────── */
 
 .ip-bar {

app/sovran_systemsos_web/templates/index.html

@@ -25,11 +25,8 @@
     <div class="title-group">
       <span class="title">Sovran_SystemsOS Hub</span>
 
-      <!-- OS Version Badge -->
-      <span class="os-version-badge" id="os-version-badge" title="Sovran_SystemsOS Version">
-        <span class="version-label">v</span>
-        <span class="version-number" id="version-number">{{ sovran_version }}</span>
-      </span>
+      <!-- OS Version Badge — styled identically to the version badge in service modals -->
+      <span class="os-version-badge" id="os-version-badge" title="Sovran_SystemsOS Version">{{ sovran_version }}</span>
     </div>
 
     <div class="header-buttons">