feat: apply various dashboard and auth fixes including demo trials, settings UI, and signup options

src/app/api/og/dashboard/[userId]/route.tsx

@@ -3,20 +3,48 @@ import { NextRequest } from 'next/server';
 import { join } from 'path';
 import { readFileSync } from 'fs';
 
-export async function GET(req: NextRequest) {
+export async function GET(req: NextRequest, { params }: { params: Promise<{ userId: string }> }) {
   try {
     const { searchParams } = new URL(req.url);
+    const { userId } = await params;
 
-    // Read metrics
-    const score = searchParams.get('score') || '0 / 0';
-    const accuracy = searchParams.get('accuracy') || '0%';
-    const qs = searchParams.get('qs') || '0';
-    const rank = searchParams.get('rank') || '#--';
+    // Fetch stats securely from backend using admin token
+    // We use backend:8000 because this runs in Next.js docker container
+    const backendUrl = process.env.NEXT_PUBLIC_API_URL?.includes('localhost')
+      ? 'http://backend:8000'
+      : process.env.NEXT_PUBLIC_API_URL || 'http://backend:8000';
+      
+    const res = await fetch(`${backendUrl}/api/users/${userId}/stats`, {
+      headers: {
+        'Authorization': 'Bearer admin'
+      },
+      cache: 'no-store'
+    });
+
+    if (!res.ok) {
+      return new Response('User not found or stats unavailable', { status: 404 });
+    }
+
+    const data = await res.json();
+
+    // Read metrics from backend response
+    const score = `${data.score} / ${data.total_marks || 300}`;
+    const accuracy = data.accuracy || '0%';
+    const qs = (data.total_questions || 0).toString();
+    const rank = data.city_rank ? `#${data.city_rank}` : '#--';
     
     // Read user info
-    const name = searchParams.get('name') || 'Student';
-    const target = searchParams.get('target') || 'JEE';
-    const plan = searchParams.get('plan') || 'Free';
+    const name = data.name || 'Student';
+    // Format target correctly (e.g. JEE_MAIN -> JEE)
+    let target = data.target_exam || 'JEE';
+    if (target === 'JEE_MAIN') target = 'JEE';
+    if (target === 'JEE_Advanced') target = 'JEE Advanced';
+    if (target === 'JEE_NEET') target = 'JEE + NEET';
+    
+    let plan = data.tier || 'Free';
+    if (plan === 'FREE') plan = 'Free';
+    if (plan === 'PRO') plan = 'Pro';
+    if (plan === 'AI_COACH') plan = 'AI Coach';
 
     // Read date (if passed, otherwise use current date/time)
     const exportDate = searchParams.get('date') || new Intl.DateTimeFormat('en-IN', {