feat: connect academic pages to backend APIs

- Generation page: exam structure dropdown loads from backend
- Generation page: selecting structure auto-selects its modules
- Rubrics page: loads rubrics from backend API with fallback to demo data

Made-with: Cursor

src/pages/GenerationPage.tsx

@@ -1,5 +1,5 @@
 import { useCallback, useEffect, useRef, useState } from "react";
-import { useMutation } from "@tanstack/react-query";
+import { useMutation, useQuery } from "@tanstack/react-query";
 import { Card, CardContent } from "@/components/ui/card";
 import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
@@ -52,6 +52,7 @@ import {
 import AiTipBanner from "@/components/ai/AiTipBanner";
 import { generationService } from "@/services/generation.service";
 import { mediaService, type Avatar } from "@/services/media.service";
+import { examsService } from "@/services/exams.service";
 import { useToast } from "@/hooks/use-toast";
 
 type ModuleKey = "reading" | "listening" | "writing" | "speaking" | "level" | "industry";
@@ -73,6 +74,7 @@ const MODULES: ModuleInfo[] = [
   { key: "industry", label: "Industry", icon: <Briefcase className="h-4 w-4" />, color: "text-amber-700", bgColor: "bg-amber-50 border-amber-200" },
 ];
 
+const MODULE_KEYS: ModuleKey[] = MODULES.map((m) => m.key);
 const CEFR_LEVELS = ["A1", "A2", "B1", "B2", "C1", "C2"];
 
 const READING_EXERCISE_TYPES = [
@@ -197,6 +199,12 @@ export default function GenerationPage() {
   const [moduleStates, setModuleStates] = useState<Record<string, ModuleState>>({});
   const [previewOpen, setPreviewOpen] = useState(false);
 
+  const structuresQ = useQuery({
+    queryKey: ["exam-structures"],
+    queryFn: () => examsService.listStructures({}),
+  });
+  const structures = structuresQ.data?.items ?? [];
+
   const getModuleState = useCallback((mod: ModuleKey): ModuleState => {
     return moduleStates[mod] ?? defaultModuleState(mod);
   }, [moduleStates]);
@@ -990,13 +998,27 @@ export default function GenerationPage() {
         </div>
         <div className="space-y-1">
           <Label>Exam Structure</Label>
-          <Select value={examStructure} onValueChange={setExamStructure}>
+          <Select value={examStructure} onValueChange={(val) => {
+            setExamStructure(val);
+            const s = structures.find((st) => String(st.id) === val);
+            if (s) {
+              const mods = (s as Record<string, unknown>).modules as string[] | undefined;
+              if (Array.isArray(mods) && mods.length) {
+                const next = new Set<ModuleKey>();
+                mods.forEach((m) => { if (MODULE_KEYS.includes(m as ModuleKey)) next.add(m as ModuleKey); });
+                setSelectedModules(next);
+                if (next.size > 0) setActiveModule([...next][0]);
+              }
+            }
+          }}>
             <SelectTrigger><SelectValue placeholder="Select an exam structure" /></SelectTrigger>
             <SelectContent>
-              <SelectItem value="standard_ielts">Standard IELTS Academic</SelectItem>
-              <SelectItem value="corporate">Corporate English Assessment</SelectItem>
-              <SelectItem value="hospitality">Hospitality English Test</SelectItem>
-              <SelectItem value="medical">Medical English Proficiency</SelectItem>
+              {structures.map((s) => (
+                <SelectItem key={s.id} value={String(s.id)}>{s.name}</SelectItem>
+              ))}
+              {structures.length === 0 && (
+                <SelectItem value="_none" disabled>No structures available</SelectItem>
+              )}
             </SelectContent>
           </Select>
         </div>

src/pages/RubricsPage.tsx

@@ -1,4 +1,5 @@
 import { useState } from "react";
+import { useQuery } from "@tanstack/react-query";
 import { Card, CardContent } from "@/components/ui/card";
 import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
@@ -8,11 +9,21 @@ import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogTrigger } from
 import { Label } from "@/components/ui/label";
 import { Textarea } from "@/components/ui/textarea";
 import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
-import { Search, Plus } from "lucide-react";
+import { Search, Plus, Loader2 } from "lucide-react";
 import AiTipBanner from "@/components/ai/AiTipBanner";
 import AiCreationAssistant from "@/components/ai/AiCreationAssistant";
+import { examsService } from "@/services/exams.service";
 
-const rubrics = [
+interface RubricItem {
+  id: number;
+  name: string;
+  levels: string[];
+  criteria: number;
+  created: string;
+  skill?: string;
+}
+
+const FALLBACK_RUBRICS: RubricItem[] = [
   { id: 1, name: "IELTS Writing Task 2", levels: ["A1","A2","B1","B2","C1","C2"], criteria: 4, created: "2025-01-05" },
   { id: 2, name: "Speaking Fluency", levels: ["A1","A2","B1","B2","C1","C2"], criteria: 3, created: "2025-01-10" },
   { id: 3, name: "Reading Comprehension", levels: ["A1","A2","B1","B2","C1"], criteria: 5, created: "2025-02-01" },
@@ -26,6 +37,13 @@ const rubricGroups = [
 export default function RubricsPage() {
   const [search, setSearch] = useState("");
 
+  const rubricsQ = useQuery({
+    queryKey: ["rubrics"],
+    queryFn: () => examsService.listRubrics({}),
+  });
+  const backendRubrics = (rubricsQ.data?.items ?? []) as RubricItem[];
+  const rubrics = backendRubrics.length > 0 ? backendRubrics : FALLBACK_RUBRICS;
+
   return (
     <div className="space-y-6">
       <div className="flex items-center justify-between">