Update Sovran Hub branding to finalized Rounded + Gradient Plus Arc + Core icon

Agent-Logs-Url: https://github.com/naturallaw777/staging_alpha/sessions/309d3e00-70ba-4927-88c7-0a72cc5ed660

Co-authored-by: naturallaw777 <99053422+naturallaw777@users.noreply.github.com>

app/sovran_systemsos_web/static/sovran-hub-icon.svg

@@ -1,15 +1,52 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" width="256" height="256">
-  <rect width="256" height="256" fill="#091C14"/>
+  <defs>
+    <linearGradient id="bg" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0%" stop-color="#153126"/>
+      <stop offset="55%" stop-color="#0F241B"/>
+      <stop offset="100%" stop-color="#091C14"/>
+    </linearGradient>
+
+    <linearGradient id="outerArc" x1="70" y1="40" x2="190" y2="210" gradientUnits="userSpaceOnUse">
+      <stop offset="0%" stop-color="#42F39A"/>
+      <stop offset="45%" stop-color="#28D978"/>
+      <stop offset="100%" stop-color="#1AA45D"/>
+    </linearGradient>
+
+    <linearGradient id="innerArc" x1="90" y1="60" x2="180" y2="190" gradientUnits="userSpaceOnUse">
+      <stop offset="0%" stop-color="#27C86F"/>
+      <stop offset="100%" stop-color="#157E49"/>
+    </linearGradient>
+
+    <filter id="innerShade" x="-10%" y="-10%" width="120%" height="120%">
+      <feOffset dx="0" dy="2"/>
+      <feGaussianBlur stdDeviation="5" result="blur"/>
+      <feComposite in="blur" in2="SourceAlpha" operator="arithmetic" k2="-1" k3="1"/>
+      <feColorMatrix type="matrix" values="
+        0 0 0 0 0
+        0 0 0 0 0
+        0 0 0 0 0
+        0 0 0 .18 0"/>
+    </filter>
+  </defs>
+
+  <rect width="256" height="256" rx="48" ry="48" fill="url(#bg)"/>
+  <rect x="1.5" y="1.5" width="253" height="253" rx="46.5" ry="46.5"
+        fill="none" stroke="rgba(255,255,255,0.08)"/>
+  <rect x="6" y="6" width="244" height="244" rx="42" ry="42"
+        fill="none" filter="url(#innerShade)"/>
+
   <path d="M128 32 A96 96 0 1 1 58 196"
         fill="none"
-        stroke="#24D176"
+        stroke="url(#outerArc)"
         stroke-width="12"
         stroke-linecap="round"/>
+
   <path d="M128 56 A72 72 0 1 1 76 178"
         fill="none"
-        stroke="#179B58"
+        stroke="url(#innerArc)"
         stroke-width="10"
         stroke-linecap="round"/>
-  <circle cx="128" cy="128" r="8" fill="#DDFBEA" opacity="0.95"/>
-  <circle cx="128" cy="128" r="18" fill="none" stroke="#24D176" stroke-opacity="0.18" stroke-width="4"/>
+
+  <circle cx="128" cy="128" r="8" fill="#F2FFF7"/>
+  <circle cx="128" cy="128" r="18" fill="none" stroke="#7BFFC0" stroke-opacity="0.14" stroke-width="4"/>
 </svg>

app/sovran_systemsos_web/templates/index.html

@@ -20,7 +20,7 @@
 
   <!-- Header bar -->
   <header class="header-bar">
-    <img src="/static/sovran-hub-icon.svg" alt="Sovran Systems" class="header-logo" />
+    <img src="/static/sovran-hub-icon.svg" alt="Sovran Hub" class="header-logo" />
     <span class="title">Sovran_SystemsOS Hub</span>
     <div class="header-buttons">
       <span class="role-badge" id="role-badge">Loading…</span>