Redesign the shell and console with a liquid-glass look.

- Title bar: floating glass capsule aligned to each page's content edge, new
  NETX mark (links-as-X), task badge, user menu with sign-out, globe locale.
- Console: resource strip on top, module launcher as the main area with
  fixed-size tiles that fill rows as modules are added, task rail sized to
  the left column; dropped health pill, refresh button and filler copy.
- Glass layer (theme/glass.css, loaded last): black-blue wallpaper with a
  faint dot grid, clear panels with specular rims, translucent controls and
  table headers; sidebar pages float their nav and work area on a 16px gutter.
- Removed ~280 lines of duplicated header CSS from primitives/theme.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/public/favicon.svg

@@ -1,16 +1,16 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" fill="none" role="img" aria-label="NETX">
-  <rect width="32" height="32" rx="8" fill="#0F2744"/>
-  <!-- Stylized N from linked nodes: network ops mark -->
-  <path
-    d="M9.5 8.5v15M9.5 8.5 22.5 23.5M22.5 8.5v15"
-    stroke="#7EB6E8"
-    stroke-width="2.2"
-    stroke-linecap="round"
-    stroke-linejoin="round"
-  />
-  <circle cx="9.5" cy="8.5" r="2.35" fill="#E8F2FC"/>
-  <circle cx="9.5" cy="23.5" r="2.35" fill="#E8F2FC"/>
-  <circle cx="22.5" cy="8.5" r="2.35" fill="#E8F2FC"/>
-  <circle cx="22.5" cy="23.5" r="2.35" fill="#E8F2FC"/>
-  <circle cx="16" cy="16" r="1.7" fill="#3D82F7"/>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" role="img" aria-label="NETX">
+  <defs>
+    <linearGradient id="g" x1="0" y1="0" x2="24" y2="24" gradientUnits="userSpaceOnUse">
+      <stop offset="0" stop-color="#3b82f6"/>
+      <stop offset="1" stop-color="#1d4ed8"/>
+    </linearGradient>
+  </defs>
+  <!-- NETX mark: an "X" of links, four nodes around a hub; one node lit as "live". -->
+  <rect width="24" height="24" rx="6.5" fill="url(#g)"/>
+  <path d="M7 7l10 10M17 7 7 17" stroke="#fff" stroke-opacity=".55" stroke-width="1.6" stroke-linecap="round"/>
+  <circle cx="12" cy="12" r="2.6" fill="#fff"/>
+  <circle cx="7" cy="7" r="1.9" fill="#fff"/>
+  <circle cx="7" cy="17" r="1.9" fill="#fff"/>
+  <circle cx="17" cy="17" r="1.9" fill="#fff"/>
+  <circle cx="17" cy="7" r="2.1" fill="#67e8f9"/>
 </svg>