fix(ui): use semantic color tokens for text foreground

- Replace hardcoded gray-900/gray-100 with text-foreground in EndpointSpeedTest
- Add text-foreground class to Input component for consistent theming
- Ensures proper text color in both light and dark modes

src/components/providers/forms/EndpointSpeedTest.tsx

@@ -559,7 +559,7 @@ const EndpointSpeedTest: React.FC<EndpointSpeedTestProps> = ({
                 <div
                   key={entry.id}
                   onClick={() => handleSelect(entry.url)}
-                  className={`group flex cursor-pointer items-center justify-between px-3 py-2.5 rounded-lg border transition ${
+                  className={`group flex cursor-pointer items-center justify-between px-3 py-2.5 rounded-lg border transition text-foreground ${
                     isSelected
                       ? "border-primary/70 bg-primary/5 shadow-sm"
                       : "border-border-default bg-background hover:bg-muted"
@@ -577,7 +577,7 @@ const EndpointSpeedTest: React.FC<EndpointSpeedTestProps> = ({
 
                     {/* 内容 */}
                     <div className="min-w-0 flex-1">
-                      <div className="truncate text-sm text-gray-900 dark:text-gray-100">
+                      <div className="truncate text-sm text-foreground">
                         {entry.url}
                       </div>
                     </div>

src/components/ui/input.tsx

@@ -9,7 +9,7 @@ const Input = React.forwardRef<HTMLInputElement, InputProps>(
       <input
         type={type}
         className={cn(
-          "flex h-9 w-full rounded-md border border-border-default bg-background px-3 py-1 text-sm shadow-sm transition-colors file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20 disabled:cursor-not-allowed disabled:opacity-50",
+          "flex h-9 w-full rounded-md border border-border-default bg-background text-foreground px-3 py-1 text-sm shadow-sm transition-colors file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20 disabled:cursor-not-allowed disabled:opacity-50",
           className,
         )}
         ref={ref}