refactor: unify focus styles across all input fields

Replace inconsistent focus border styles with a unified soft blue ring effect
across all input and textarea components.

Changes:
- Add consistent focus:ring styles to Input and Textarea components
- Use focus:ring-blue-500/20 (light) and focus:ring-blue-400/20 (dark)
- Remove focus border color changes for a more subtle design
- Update ApiKeyInput to match the unified focus style
- Update all manual textarea elements (Codex and Claude configs)

Benefits:
- Consistent visual feedback across all form inputs
- Soft, elegant focus indication with blue glow effect
- No jarring border color changes
- Better user experience with subtle, professional styling

The focus effect now uses only a soft blue ring (20% opacity) without
changing border colors, creating a more refined and less distracting
interaction pattern.

src/components/providers/forms/ApiKeyInput.tsx

@@ -30,8 +30,8 @@ const ApiKeyInput: React.FC<ApiKeyInputProps> = ({
 
   const inputClass = `w-full px-3 py-2 pr-10 border rounded-lg text-sm transition-colors ${
     disabled
-      ? "bg-gray-100 dark:bg-gray-800 border-border-default  text-gray-400 dark:text-gray-500 cursor-not-allowed"
-      : "border-border-default  dark:bg-gray-800 dark:text-gray-100 focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20 focus:border-border-active "
+      ? "bg-gray-100 dark:bg-gray-800 border-border-default text-gray-400 dark:text-gray-500 cursor-not-allowed"
+      : "border-border-default dark:bg-gray-800 dark:text-gray-100 focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20"
   }`;
 
   return (

src/components/providers/forms/CodexConfigSections.tsx

@@ -36,7 +36,7 @@ export const CodexAuthSection: React.FC<CodexAuthSectionProps> = ({
         placeholder={t("codexConfig.authJsonPlaceholder")}
         rows={6}
         required
-        className="w-full px-3 py-2 border border-border-default  dark:bg-gray-800 dark:text-gray-100 rounded-lg text-sm font-mono focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20 focus:border-border-active  transition-colors resize-y min-h-[8rem]"
+        className="w-full px-3 py-2 border border-border-default  dark:bg-gray-800 dark:text-gray-100 rounded-lg text-sm font-mono focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20  transition-colors resize-y min-h-[8rem]"
         autoComplete="off"
         autoCorrect="off"
         autoCapitalize="none"
@@ -126,7 +126,7 @@ export const CodexConfigSection: React.FC<CodexConfigSectionProps> = ({
         onChange={(e) => onChange(e.target.value)}
         placeholder=""
         rows={8}
-        className="w-full px-3 py-2 border border-border-default  dark:bg-gray-800 dark:text-gray-100 rounded-lg text-sm font-mono focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20 focus:border-border-active  transition-colors resize-y min-h-[10rem]"
+        className="w-full px-3 py-2 border border-border-default  dark:bg-gray-800 dark:text-gray-100 rounded-lg text-sm font-mono focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20  transition-colors resize-y min-h-[10rem]"
         autoComplete="off"
         autoCorrect="off"
         autoCapitalize="none"

src/components/providers/forms/CommonConfigEditor.tsx

@@ -85,7 +85,7 @@ export function CommonConfigEditor({
   }
 }`}
           rows={14}
-          className="w-full px-3 py-2 border border-border-default dark:bg-gray-800 dark:text-gray-100 rounded-lg text-sm font-mono focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20 focus:border-border-active transition-colors resize-y min-h-[16rem]"
+          className="w-full px-3 py-2 border border-border-default dark:bg-gray-800 dark:text-gray-100 rounded-lg text-sm font-mono focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20 transition-colors resize-y min-h-[16rem]"
           autoComplete="off"
           autoCorrect="off"
           autoCapitalize="none"
@@ -125,7 +125,7 @@ export function CommonConfigEditor({
               value={commonConfigSnippet}
               onChange={(e) => onCommonConfigSnippetChange(e.target.value)}
               rows={12}
-              className="w-full px-3 py-2 border border-border-default dark:bg-gray-800 dark:text-gray-100 rounded-lg text-sm font-mono focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20 focus:border-border-active transition-colors resize-y min-h-[14rem]"
+              className="w-full px-3 py-2 border border-border-default dark:bg-gray-800 dark:text-gray-100 rounded-lg text-sm font-mono focus:outline-none focus:ring-2 focus:ring-blue-500/20 dark:focus:ring-blue-400/20 transition-colors resize-y min-h-[14rem]"
               autoComplete="off"
               autoCorrect="off"
               autoCapitalize="none"

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-visible:outline-none focus-visible:border-border-active disabled:cursor-not-allowed disabled:opacity-50",
+          "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",
           className,
         )}
         ref={ref}

src/components/ui/textarea.tsx

@@ -8,7 +8,7 @@ const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
     return (
       <textarea
         className={cn(
-          "flex min-h-[80px] w-full rounded-md border border-border-default bg-background px-3 py-2 text-sm shadow-sm placeholder:text-muted-foreground focus-visible:outline-none focus-visible:border-border-active disabled:cursor-not-allowed disabled:opacity-50",
+          "flex min-h-[80px] w-full rounded-md border border-border-default bg-background px-3 py-2 text-sm shadow-sm 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}