feat(v3): restructure project + add complete frontend

- Restructure: move backend from new_project/ to backend/
- Add full React/TypeScript frontend (37 pages, 17 services, 16 type defs, 11 query hooks)
- Add docs/ with SRS specs, user stories, and workflow documentation
- Update .gitignore for new directory layout

Workflows implemented:
  WF1 User Signup, WF2 Placement Test, WF3 Exam Configuration,
  WF4 General English Exam, WF5 Course Generation,
  WF6 Entity Student Onboarding, AI Course Generation,
  Adaptive Learning Engine UI, White-Label Branding, Score Release

Made-with: Cursor

src/pages/ScoreVerification.tsx

@@ -0,0 +1,50 @@
+import { useParams } from "react-router-dom";
+import { useQuery } from "@tanstack/react-query";
+import { CheckCircle2, XCircle } from "lucide-react";
+import { Card, CardContent } from "@/components/ui/card";
+import { queryKeys } from "@/hooks/queries/keys";
+import { verificationService } from "@/services/verification.service";
+
+export default function ScoreVerification() {
+  const { verificationHash } = useParams<{ verificationHash: string }>();
+  const hash = verificationHash ?? "";
+
+  const { data, isLoading, isError } = useQuery({
+    queryKey: queryKeys.verification.verify(hash),
+    queryFn: () => verificationService.verify(hash),
+    enabled: !!hash,
+    retry: false,
+  });
+
+  const valid = data?.valid === true;
+
+  return (
+    <div className="min-h-screen flex items-center justify-center p-6 bg-muted/40">
+      <Card className="w-full max-w-md border shadow-md">
+        <CardContent className="pt-8 pb-8 space-y-6">
+          <div className="text-center font-semibold tracking-tight text-lg">EnCoach</div>
+          {isLoading ? (
+            <p className="text-center text-muted-foreground text-sm">Verifying…</p>
+          ) : isError || !valid ? (
+            <div className="flex flex-col items-center gap-3 text-center">
+              <XCircle className="h-14 w-14 text-destructive" />
+              <p className="text-sm text-muted-foreground">This verification code is invalid or has expired.</p>
+            </div>
+          ) : (
+            <div className="flex flex-col items-center gap-4 text-center">
+              <CheckCircle2 className="h-14 w-14 text-green-600" />
+              <div className="space-y-1">
+                <p className="font-medium text-lg">{data.student_name}</p>
+                <p className="text-sm text-muted-foreground capitalize">{data.exam_type}</p>
+                <p className="text-2xl font-bold">{data.overall_score}</p>
+                <p className="text-xs text-muted-foreground">
+                  Issued {data.issued_at ? new Date(data.issued_at).toLocaleDateString() : "—"}
+                </p>
+              </div>
+            </div>
+          )}
+        </CardContent>
+      </Card>
+    </div>
+  );
+}