Refactor global styles and enhance MITM functionality

- Updated global CSS to implement a new brand color palette and improve light/dark theme consistency.
- Enhanced the MitmServerCard component to provide clearer user feedback regarding admin privileges.
- Filtered LLM combos in the CombosPage to ensure only relevant data is displayed.
- Improved APIPageClient layout for better usability and visual consistency.
- Added functionality to save and load DNS tool states in the MITM manager.
- Updated OAuth configuration URLs for Qwen to reflect the new endpoint structure.
- Refined tunnel management logic to improve reliability and user experience.

src/shared/components/ThemeToggle.js

@@ -4,24 +4,20 @@ import { useTheme } from "@/shared/hooks/useTheme";
 import { cn } from "@/shared/utils/cn";
 
 export default function ThemeToggle({ className, variant = "default" }) {
-  const { theme, toggleTheme, isDark } = useTheme();
+  const { isDark, toggleTheme } = useTheme();
 
   const variants = {
     default: cn(
       "flex items-center justify-center size-10 rounded-full",
-      "text-text-muted",
-      "hover:bg-black/5",
-      "hover:text-text-main",
-      "transition-colors"
+      "text-text-muted hover:text-text-main",
+      "hover:bg-surface-2 transition-colors"
     ),
     card: cn(
       "flex items-center justify-center size-11 rounded-full",
-      "bg-surface/60",
-      "hover:bg-surface",
+      "bg-surface/60 hover:bg-surface",
       "border border-border",
-      "backdrop-blur-md shadow-sm hover:shadow-md",
-      "text-text-muted-light hover:text-primary",
-      "hover:text-primary",
+      "backdrop-blur-md shadow-sm hover:shadow-[var(--shadow-warm)]",
+      "text-text-muted hover:text-brand-500",
       "transition-all group"
     ),
   };
@@ -44,4 +40,3 @@ export default function ThemeToggle({ className, variant = "default" }) {
     </button>
   );
 }
-