Fix IP address text color in IPAM maintenance and logs

- Added color: var(--text-primary) to unlinked allocations IP in ipam_dashboard.html
- Added color: var(--text-primary) to IP address column in logs.html
- Prevents black text on dark theme

backend/app/templates/ipam_dashboard.html

@@ -454,7 +454,7 @@ function renderUnlinked(unlinked) {
         html += `
             <div style="display: flex; justify-content: space-between; align-items: center; padding: 0.5rem; border-bottom: 1px solid var(--border-color);">
                 <div>
-                    <span style="font-family: monospace;">${u.ip_address}</span>
+                    <span style="font-family: monospace; color: var(--text-primary);">${u.ip_address}</span>
                     <span style="color: var(--text-secondary); margin-left: 0.5rem;">${u.resource_name}</span>
                 </div>
                 <div>