feat(portal-shell): clean widget design tokens and fix lint:tokens (P1-6)

516 mechanical replacements across 25 widget files:
- spacing xs/sm/md/lg/xl to numeric 1/2/3/4/6
- text-heading-3 to text-lg font-semibold
- bg-danger to bg-destructive
- border border dedup

Fix .eslintrc.tokens.js to use typescript-eslint parser (was importing
uninstalled @typescript-eslint/parser). lint:tokens now passes.

apps/portal-shell/src/widgets/universal/notifications-widget/index.tsx

@@ -1,4 +1,4 @@
-"use client";
+"use client";
 
 /**
  * notifications-widget（universal / main）
@@ -23,20 +23,20 @@ function TypeBadge({ type }: { type: string }): React.ReactElement {
   const label = TYPE_LABEL[type] ?? type;
   if (type === "urgent") {
     return (
-      <span className="rounded-md bg-danger px-sm py-xs text-xs text-primary-foreground">
+      <span className="rounded-md bg-destructive px-2 py-1 text-xs text-primary-foreground">
         {label}
       </span>
     );
   }
   if (type === "warning") {
     return (
-      <span className="rounded-md bg-primary px-sm py-xs text-xs text-primary-foreground">
+      <span className="rounded-md bg-primary px-2 py-1 text-xs text-primary-foreground">
         {label}
       </span>
     );
   }
   return (
-    <span className="rounded-md bg-muted px-sm py-xs text-xs text-muted-foreground">
+    <span className="rounded-md bg-muted px-2 py-1 text-xs text-muted-foreground">
       {label}
     </span>
   );
@@ -58,26 +58,26 @@ export default function NotificationsWidget(
   const total = data?.total ?? 0;
 
   return (
-    <section className="rounded-xl border border bg-card p-4">
+    <section className="rounded-xl border bg-card p-4">
       <div className="flex">
-        <h3 className="flex-1 text-heading-3 text-foreground">通知</h3>
+        <h3 className="flex-1 text-lg font-semibold text-foreground">通知</h3>
         <span className="text-sm text-muted-foreground">共 {total} 条</span>
       </div>
       {items.length === 0 ? (
-        <p className="mt-sm text-sm text-muted-foreground">暂无通知</p>
+        <p className="mt-2 text-sm text-muted-foreground">暂无通知</p>
       ) : (
-        <ul className="mt-sm space-y-sm">
+        <ul className="mt-2 space-y-2">
           {items.map((item) => (
             <li
               key={item.id}
-              className="border-b border py-xs text-sm text-foreground"
+              className="border-b border py-1 text-sm text-foreground"
             >
               <div className="flex items-center gap-4">
                 <span className="flex-1">{item.title}</span>
                 <TypeBadge type={item.type} />
               </div>
-              <p className="mt-xs text-xs text-muted-foreground">{item.body}</p>
-              <p className="mt-xs text-xs text-muted-foreground">
+              <p className="mt-1 text-xs text-muted-foreground">{item.body}</p>
+              <p className="mt-1 text-xs text-muted-foreground">
                 {item.createdAt}
               </p>
             </li>