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/admin/AdminBatchDetail.tsx

@@ -0,0 +1,89 @@
+import { useParams, Link } from "react-router-dom";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
+import { useBatches, useStudents, useTimetable } from "@/hooks/queries";
+import { ArrowLeft, Users, Calendar, BookOpen } from "lucide-react";
+
+export default function AdminBatchDetail() {
+  const { id } = useParams();
+  const batchId = id ? Number(id) : NaN;
+  const { data: batchesData, isLoading: lb } = useBatches();
+  const { data: studentsData, isLoading: ls } = useStudents(
+    Number.isFinite(batchId) ? { batch_id: batchId, size: 500 } : { size: 500 },
+  );
+  const { data: timetableData, isLoading: ltt } = useTimetable();
+  const batches = batchesData?.items ?? [];
+  const students = studentsData?.items ?? [];
+  const timetableSessions = Array.isArray(timetableData) ? timetableData : [];
+  if (lb || ls || ltt) return <div className="flex items-center justify-center min-h-[400px]"><div className="animate-spin rounded-full h-8 w-8 border-b-2 border-primary" /></div>;
+
+  const batch = batches.find(b => String(b.id) === id);
+
+  if (!batch) return <div className="p-8 text-center text-muted-foreground">Batch not found.</div>;
+
+  const studentIds = Array.isArray(batch.student_ids) ? batch.student_ids : [];
+  const batchStudents = Number.isFinite(batchId)
+    ? students.filter((s) => s.batch_id === batchId)
+    : students.filter((s) => studentIds.includes(s.id));
+  const coursePrefix = (batch.course_name || "").split(" ")[0];
+  const batchSessions = timetableSessions.filter(s =>
+    s.batch_name === batch.name || (coursePrefix && (s.course_name || "").includes(coursePrefix)),
+  );
+
+  return (
+    <div className="space-y-6">
+      <div className="flex items-center gap-3">
+        <Button variant="ghost" size="icon" asChild><Link to="/admin/batches"><ArrowLeft className="h-4 w-4" /></Link></Button>
+        <div>
+          <h1 className="text-2xl font-bold">{batch.name}</h1>
+          <p className="text-muted-foreground">{batch.course_name} · {batch.teacher_name}</p>
+        </div>
+      </div>
+
+      <div className="grid grid-cols-1 sm:grid-cols-4 gap-4">
+        <Card><CardContent className="pt-4"><Users className="h-4 w-4 text-primary mb-1" /><p className="text-lg font-bold">{batch.student_count}/{batch.capacity}</p><p className="text-xs text-muted-foreground">Students</p></CardContent></Card>
+        <Card><CardContent className="pt-4"><Calendar className="h-4 w-4 text-info mb-1" /><p className="text-sm font-bold">{batch.schedule}</p><p className="text-xs text-muted-foreground">Schedule</p></CardContent></Card>
+        <Card><CardContent className="pt-4"><BookOpen className="h-4 w-4 text-success mb-1" /><p className="text-sm font-bold">{batch.start_date} — {batch.end_date}</p><p className="text-xs text-muted-foreground">Duration</p></CardContent></Card>
+        <Card><CardContent className="pt-4"><Badge variant={batch.status === "active" ? "default" : "secondary"} className="capitalize">{batch.status}</Badge><p className="text-xs text-muted-foreground mt-1">Status</p></CardContent></Card>
+      </div>
+
+      <Card>
+        <CardHeader><CardTitle className="text-lg">Enrolled Students</CardTitle></CardHeader>
+        <CardContent>
+          <Table>
+            <TableHeader><TableRow><TableHead>Student</TableHead><TableHead>Attendance</TableHead><TableHead>Avg Grade</TableHead><TableHead>Risk</TableHead></TableRow></TableHeader>
+            <TableBody>
+              {batchStudents.map(s => (
+                <TableRow key={s.id}>
+                  <TableCell className="font-medium">{s.name}</TableCell>
+                  <TableCell>—</TableCell>
+                  <TableCell>—</TableCell>
+                  <TableCell><Badge variant="secondary" className="capitalize">—</Badge></TableCell>
+                </TableRow>
+              ))}
+            </TableBody>
+          </Table>
+        </CardContent>
+      </Card>
+
+      <Card>
+        <CardHeader><CardTitle className="text-lg">Timetable</CardTitle></CardHeader>
+        <CardContent className="space-y-2">
+          {batchSessions.length === 0 ? (
+            <p className="text-muted-foreground text-sm">No sessions scheduled.</p>
+          ) : batchSessions.map(s => (
+            <div key={s.id} className="flex items-center justify-between p-3 rounded border">
+              <div>
+                <p className="text-sm font-medium">{s.day} {s.start_time}–{s.end_time}</p>
+                <p className="text-xs text-muted-foreground">{s.room}</p>
+              </div>
+              <span className="text-xs px-2 py-1 rounded text-white bg-primary">{s.course_name}</span>
+            </div>
+          ))}
+        </CardContent>
+      </Card>
+    </div>
+  );
+}