feat: shared UI components — stats-card, course-progress-card, leaderboard-table, notification-bell

src/app/dashboard/page.tsx

@@ -4,13 +4,14 @@ import { useRequireAuth } from "@/lib/hooks/use-require-auth";
 import { useCourses, useRecommendedCourses } from "@/lib/hooks/use-courses";
 import { useRewards } from "@/lib/hooks/use-rewards";
 import { useCredentials } from "@/lib/hooks/use-credentials";
-import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Card, CardContent } from "@/components/ui/card";
 import { CourseCard } from "@/components/course/course-card";
-import { ProgressBar } from "@/components/course/progress-bar";
+import { CourseProgressCard } from "@/components/course/course-progress-card";
 import { BalanceDisplay } from "@/components/wallet/balance-display";
 import { CredentialCard } from "@/components/credentials/credential-card";
 import { DashboardSkeleton } from "@/components/shared/loading-skeleton";
 import { EmptyState } from "@/components/shared/empty-state";
+import { StatsCard } from "@/components/shared/stats-card";
 import { useCourseStore } from "@/store/course-store";
 import {
   BookOpen,
@@ -76,52 +77,30 @@ export default function DashboardPage() {
         <TabsContent value="overview" className="space-y-8 focus-visible:outline-none focus-visible:ring-0">
           {/* Stats */}
           <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-4">
-            <Card>
-              <CardContent className="flex items-center gap-3 p-4">
-                <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-primary-100">
-                  <BookOpen className="h-5 w-5 text-primary-600" />
-                </div>
-                <div>
-                  <p className="text-2xl font-bold">{enrollments.length}</p>
-                  <p className="text-xs text-gray-500">Enrolled Courses</p>
-                </div>
-              </CardContent>
-            </Card>
-            <Card>
-              <CardContent className="flex items-center gap-3 p-4">
-                <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-green-100">
-                  <TrendingUp className="h-5 w-5 text-green-600" />
-                </div>
-                <div>
-                  <p className="text-2xl font-bold">
-                    {enrollments.filter((e) => e.progress === 100).length}
-                  </p>
-                  <p className="text-xs text-gray-500">Completed</p>
-                </div>
-              </CardContent>
-            </Card>
-            <Card>
-              <CardContent className="flex items-center gap-3 p-4">
-                <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-stellar-purple/10">
-                  <Trophy className="h-5 w-5 text-stellar-purple" />
-                </div>
-                <div>
-                  <p className="text-2xl font-bold">{totalBalance.toFixed(1)}</p>
-                  <p className="text-xs text-gray-500">LEARN Tokens</p>
-                </div>
-              </CardContent>
-            </Card>
-            <Card>
-              <CardContent className="flex items-center gap-3 p-4">
-                <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-yellow-100">
-                  <Award className="h-5 w-5 text-yellow-600" />
-                </div>
-                <div>
-                  <p className="text-2xl font-bold">{credentials.length}</p>
-                  <p className="text-xs text-gray-500">Credentials</p>
-                </div>
-              </CardContent>
-            </Card>
+            <StatsCard
+              icon={BookOpen}
+              label="Enrolled Courses"
+              value={enrollments.length}
+              color="primary"
+            />
+            <StatsCard
+              icon={TrendingUp}
+              label="Completed"
+              value={enrollments.filter((e) => e.progress === 100).length}
+              color="success"
+            />
+            <StatsCard
+              icon={Trophy}
+              label="LEARN Tokens"
+              value={totalBalance.toFixed(1)}
+              color="purple"
+            />
+            <StatsCard
+              icon={Award}
+              label="Credentials"
+              value={credentials.length}
+              color="warning"
+            />
           </div>
 
           <section>
@@ -174,21 +153,17 @@ export default function DashboardPage() {
             ) : (
               <div className="grid grid-cols-1 gap-4 md:grid-cols-2 lg:grid-cols-3">
                 {enrolledCourses.map(({ enrollment, course }) => (
-                  <Card key={enrollment.id}>
-                    <CardContent className="p-4">
-                      <h3 className="font-semibold text-gray-900 mb-2">
-                        {course?.title || "Course"}
-                      </h3>
-                      <ProgressBar
-                        value={progress[enrollment.courseId]?.progressPercent ?? enrollment.progress}
-                      />
-                      <Link href={`/courses/${enrollment.courseId}`}>
-                        <Button variant="ghost" size="sm" className="mt-3 w-full">
-                          Continue Learning
-                        </Button>
-                      </Link>
-                    </CardContent>
-                  </Card>
+                  <CourseProgressCard
+                    key={enrollment.id}
+                    courseId={enrollment.courseId}
+                    courseTitle={course?.title || "Course"}
+                    progress={
+                      progress[enrollment.courseId]?.progressPercent ??
+                      enrollment.progress
+                    }
+                    completedModules={enrollment.completedModules?.length}
+                    moduleCount={course?.totalModules}
+                  />
                 ))}
               </div>
             )}

src/app/layout.tsx

@@ -51,8 +51,6 @@ export const metadata: Metadata = {
   },
 };
 
-import { PageTransition } from "@/components/shared/page-transition";
-
 export default function RootLayout({
   children,
 }: {

src/components/course/course-progress-card.tsx

@@ -0,0 +1,90 @@
+"use client";
+
+import { memo } from "react";
+import Link from "next/link";
+import { cn } from "@/lib/utils/cn";
+import { Card, CardContent } from "@/components/ui/card";
+import { ProgressBar } from "@/components/course/progress-bar";
+import { Button } from "@/components/ui/button";
+import { Badge } from "@/components/ui/badge";
+import { ArrowRight, CheckCircle2, Layers } from "lucide-react";
+
+export interface CourseProgressCardProps {
+  courseId: string;
+  courseTitle: string;
+  /** 0-100 completion percentage. */
+  progress: number;
+  completedModules?: number;
+  moduleCount?: number;
+  /** Optional href for the continue action. Defaults to the course detail page. */
+  continueHref?: string;
+  className?: string;
+}
+
+/**
+ * Dedicated card for an enrolled course on the dashboard. Shows the course
+ * title, an animated progress bar, module count and a quick continue action,
+ * plus explicit completion status.
+ */
+export const CourseProgressCard = memo(function CourseProgressCard({
+  courseId,
+  courseTitle,
+  progress,
+  completedModules,
+  moduleCount,
+  continueHref,
+  className,
+}: CourseProgressCardProps) {
+  const clamped = Math.min(100, Math.max(0, progress));
+  const isComplete = clamped >= 100;
+
+  return (
+    <Card
+      className={cn(
+        "flex h-full flex-col transition-shadow hover:shadow-md",
+        className
+      )}
+    >
+      <CardContent className="flex flex-1 flex-col p-4">
+        <div className="mb-3 flex items-start justify-between gap-2">
+          <h3 className="font-semibold text-gray-900 dark:text-gray-100">
+            {courseTitle}
+          </h3>
+          <Badge
+            variant={isComplete ? "success" : "secondary"}
+            className="flex-shrink-0"
+          >
+            {isComplete ? "Completed" : "In Progress"}
+          </Badge>
+        </div>
+
+        {moduleCount !== undefined && (
+          <p className="mb-2 flex items-center gap-1.5 text-xs text-gray-500 dark:text-gray-400">
+            <Layers className="h-3.5 w-3.5" aria-hidden="true" />
+            {completedModules !== undefined
+              ? `${completedModules} of ${moduleCount} modules`
+              : `${moduleCount} modules`}
+          </p>
+        )}
+
+        <ProgressBar value={clamped} className="mb-4" />
+
+        <div className="mt-auto">
+          <Link href={continueHref ?? `/courses/${courseId}`} className="block">
+            <Button variant="ghost" size="sm" className="w-full gap-1">
+              {isComplete ? (
+                <>
+                  Review Course <CheckCircle2 className="h-4 w-4" />
+                </>
+              ) : (
+                <>
+                  Continue Learning <ArrowRight className="h-4 w-4" />
+                </>
+              )}
+            </Button>
+          </Link>
+        </div>
+      </CardContent>
+    </Card>
+  );
+});

src/components/course/module-list.tsx

@@ -98,8 +98,6 @@ export function ModuleList({
                 aria-current={isCurrent ? "step" : undefined}
                 className={cn(
                   "flex items-center gap-3 rounded-lg px-3 py-3 transition-colors hover:bg-gray-50 cursor-pointer dark:hover:bg-gray-800 focus-visible:ring-2 focus-visible:ring-primary-500 focus-visible:outline-none",
-                  isCurrent && "bg-primary-50 border border-primary-200"
-                  "flex items-center gap-3 rounded-lg px-3 py-3 transition-colors hover:bg-gray-50 cursor-pointer dark:hover:bg-gray-800",
                   isCurrent && "bg-primary-50 border border-primary-200 dark:bg-primary-900/30 dark:border-primary-800"
                 )}
               >

src/components/course/quiz-interface.tsx

@@ -125,6 +125,7 @@ export function QuizInterface({ quiz, onSubmit, onRetry, className }: QuizInterf
               </Button>
               <p className="mt-2 text-xs text-gray-500 dark:text-gray-400">
                 You need {quiz.passingScore}% to pass.
+              </p>
             </div>
           )}
           {!attempt.passed && onRetry && (

src/components/layout/header.tsx

@@ -22,6 +22,7 @@ import {
 import { LogOut, Settings, User } from "lucide-react";
 import { Sun, Moon } from "lucide-react";
 import { useTheme } from "@/components/theme/theme-provider";
+import { NotificationBell } from "@/components/shared/notification-bell";
 
 export function Header() {
   const { isAuthenticated, walletAddress } = useAuthStore();
@@ -63,6 +64,7 @@ export function Header() {
 
         {/* Right side */}
         <div className="flex items-center gap-3">
+          {isAuthenticated && <NotificationBell />}
           {isAuthenticated && walletAddress && (
             <DropdownMenu>
               <DropdownMenuTrigger asChild>