fix: border color incorrect in tailwind (#1544)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Introduced new UI theme variables for border color, border radius, and
primary color states to enhance customization options.

* **Refactor**
* Removed redundant and unused CSS variables related to primary color
and border radius for improved consistency and maintainability.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: elibosley

@tailwind-shared/base-utilities.css

@@ -60,17 +60,7 @@
     border-color: hsl(var(--border));
   }
 
-  :root {
-    --ui-primary: var(--color-primary-500);
-    --ui-primary-hover: var(--color-primary-600);
-    --ui-primary-active: var(--color-primary-700);
-  }
 
-  .dark {
-    --ui-primary: var(--color-primary-500);
-    --ui-primary-hover: var(--color-primary-600);
-    --ui-primary-active: var(--color-primary-700);
-  }
 
   body {
     --color-alpha: #1c1b1b;

@tailwind-shared/unraid-theme.css

@@ -18,6 +18,11 @@
 
   /* Border color default */
   --default-border-color: var(--color-border);
+  --ui-border-muted: hsl(var(--border));
+  --ui-radius: 0.5rem;
+  --ui-primary: var(--color-primary-500);
+  --ui-primary-hover: var(--color-primary-600);
+  --ui-primary-active: var(--color-primary-700);
 
   /* Color palette */
   --color-inherit: inherit;
@@ -170,7 +175,6 @@
 
   /* Radius */
   --radius: 0.5rem;
-  --ui-radius: 0.5rem;
 
   /* Text Resizing */
   --text-xs: 1.2rem; /* 12px at 10px base */