```

add new hooks for fetching QuizCRQuestions and categories, update related components to use the new hooks, and refactor SelectCategory page to use the new API
```

002_source/ionic_mobile/src/hooks/fetchCRQuestions.tsx

@@ -0,0 +1,30 @@
+import { idCard } from 'ionicons/icons';
+import { QuizCRQuestion } from '../types/QuizCRQuestion';
+import { usePocketBase } from './usePocketBase';
+import { QueryClient } from '@tanstack/react-query';
+import PocketBase from 'pocketbase';
+
+const queryClient = new QueryClient({
+  defaultOptions: {
+    queries: {
+      staleTime: Infinity,
+    },
+  },
+});
+
+const fetchCRQuestions = async (cat_id: string, pb: PocketBase) => {
+  const response = await queryClient.fetchQuery({
+    queryKey: ['fetchData', cat_id],
+    staleTime: 60 * 1000,
+    queryFn: async () => {
+      return await pb.collection('QuizCRQuestions').getList<QuizCRQuestion>(1, 9999, {
+        filter: `cat_id = "${cat_id}"`,
+        $autoCancel: false,
+      });
+    },
+  });
+
+  return response;
+};
+
+export default fetchCRQuestions;

002_source/ionic_mobile/src/hooks/useListQuizCRCategories.tsx

@@ -0,0 +1,38 @@
+// CR = ConnectiveRevision
+import { usePocketBase } from './usePocketBase.tsx';
+import { useQuery } from '@tanstack/react-query';
+import IListeningPracticeCategory from '../interfaces/IListeningPracticeCategory.tsx';
+
+const useListQuizCRCategories = () => {
+  const { user, pb } = usePocketBase();
+  return useQuery({
+    queryKey: [
+      'useListQuizConnectiveRevisionContent',
+      'feeds',
+      'all',
+      user?.id || '',
+      //
+    ],
+    staleTime: 60 * 1000,
+    queryFn: async ({
+      queryKey,
+    }: {
+      queryKey: [
+        'useListQuizConnectiveRevisionContent',
+        'feeds',
+        'all',
+        string | null,
+        //
+      ];
+    }) => {
+      console.log('calling useListQuizConnectiveRevisionContent');
+      return await pb.collection('LessonsCategories').getList<IListeningPracticeCategory>(1, 9999, {
+        sort: 'pos',
+        $autoCancel: false,
+      });
+    },
+    // enabled: !!user?.id,
+  });
+};
+
+export default useListQuizCRCategories;

002_source/ionic_mobile/src/hooks/useListQuizCRQuestionByCRCategoryId.tsx

@@ -0,0 +1,26 @@
+import { usePocketBase } from './usePocketBase.tsx';
+import { useQuery } from '@tanstack/react-query';
+import { QuizCRQuestion } from '../types/QuizCRQuestion.ts/index.ts';
+
+const useListQuizCRQuestionByCRCategoryId = (CRCategoryId: string) => {
+  const { user, pb } = usePocketBase();
+  return useQuery({
+    queryKey: ['useListQuizCRQuestionByCRCategoryId', 'feeds', 'all', user?.id || '', CRCategoryId],
+    staleTime: 60 * 1000,
+    queryFn: async ({
+      queryKey,
+    }: {
+      queryKey: ['useListQuizCRQuestionByCRCategoryId', 'feeds', 'all', string | null, string];
+    }) => {
+      console.log('calling useListQuizCRQuestionByCRCategoryId');
+      return await pb.collection('QuizCRQuestions').getList<QuizCRQuestion>(1, 9999, {
+        filter: `cat_id = "${CRCategoryId}"`,
+        sort: 'id',
+        $autoCancel: false,
+      });
+    },
+    // enabled: !!user?.id && !!CRCategoryId,
+  });
+};
+
+export default useListQuizCRQuestionByCRCategoryId;

002_source/ionic_mobile/src/interfaces/IConnectivesRevisionCategory.tsx

@@ -5,7 +5,9 @@ interface IConnectivesRevisionCategory {
   test_i: number;
   cat_info: string;
   cat_name: string;
-  content: IConnectivesRevisionQuestion[] | [];
+  content?: IConnectivesRevisionQuestion[] | [];
+  //
+  id: string;
 }
 
 export default IConnectivesRevisionCategory;

002_source/ionic_mobile/src/pages/ConnectiveRevision/IQuestionCard.tsx

@@ -1,3 +1,4 @@
+// abonded
 interface IQuestionMeta {
   question_idx: number;
   question_fh: string;

002_source/ionic_mobile/src/pages/ConnectiveRevision/QuizContent.tsx

@@ -155,7 +155,7 @@ const QuizContent: React.FC<IQuestionCard> = ({
         >
           {answer_list.map((connective, idx) => {
             return (
-              <div>
+              <div key={idx}>
                 <IonButton
                   color={'dark'}
                   ref={button_refs[idx]}

002_source/ionic_mobile/src/pages/ConnectiveRevision/QuizRun.tsx

@@ -8,11 +8,15 @@ import { useMyIonQuizContext } from '../../contexts/MyIonQuiz';
 import { listConectivesRevisionContent } from '../../public_data/listConectivesRevisionContent';
 import { shuffleArray } from '../../utils/shuffleArray';
 import QuizContent from './QuizContent';
+import fetchCRQuestions from '../../hooks/fetchCRQuestions';
+import { usePocketBase } from '../../hooks/usePocketBase';
 
 function ConnectiveRevisionQuizRun() {
   const router = useIonRouter();
-  const { p_route } = useParams<{ p_route: string }>();
-  const i_p_route = parseInt(p_route);
+  const { p_route: cat_id } = useParams<{ p_route: string }>();
+
+  // NOTE: abonded, should be updated with `i_cat_id` when done
+  const i_p_route = parseInt(cat_id);
 
   const { setTabActive } = useAppStateContext();
   const [question_list, setQuestionList] = useState<IQuestionJson[] | []>([]);
@@ -22,6 +26,9 @@ function ConnectiveRevisionQuizRun() {
   const [isOpenCorrectAnswer, setIsOpenCorrectAnswer] = useState(false);
   const [isOpenWrongAnswer, setIsOpenWrongAnswer] = useState(false);
   const [answer_list, setAnswerList] = useState<string[]>(['but', 'and', 'or', 'of', 'with']);
+
+  const { user, pb } = usePocketBase();
+
   const {
     setConnectiveRevisionCurrentTest,
     setConnectiveRevisionProgress,
@@ -79,19 +86,19 @@ function ConnectiveRevisionQuizRun() {
 
   useEffect(() => {
     (async () => {
-      const res_json = await listConectivesRevisionContent();
-      let temp_init_ans = res_json[i_p_route].init_ans;
+      const res_json = await fetchCRQuestions(cat_id, pb);
+      let temp_init_ans: string[] = res_json.items[0].init_answer;
 
       setInitAnswer(temp_init_ans);
-      let temp = res_json[i_p_route].content;
+      let temp = res_json.items;
       let shuffled_temp = shuffleArray(temp);
       // let shuffled_temp = temp;
       setQuestionList(shuffled_temp);
 
-      let question_meta_current = res_json[i_p_route].content[0];
+      let question_meta_current = res_json.items[0] as unknown as IQuestionMeta;
       setCurrentQuestionMeta({
-        question_idx: current_question_idx,
         ...question_meta_current,
+        question_idx: current_question_idx,
       });
     })();
     setTabActive(QUIZ_MAIN_MENU_LINK);
@@ -113,31 +120,7 @@ function ConnectiveRevisionQuizRun() {
             total_questions_num={question_list.length}
             answer_list={answer_list}
             quiz_idx={i_p_route + 1}
-            //
           />
-          {/*  */}
-          {/* <CorrectAnswerToast isOpen={isOpenCorrectAnswer} dismiss={() => setIsOpenCorrectAnswer(false)} /> */}
-          {/*  */}
-          {/* <WrongAnswerToast
-            correct_answer={current_question_meta.modal_ans}
-            isOpen={isOpenWrongAnswer}
-            dismiss={() => setIsOpenWrongAnswer(false)}
-          /> */}
-          {/*
-          <IonToast
-            isOpen={isOpenCorrectAnswer}
-            message='This answer is correct'
-            onDidDismiss={() => setIsOpenCorrectAnswer(false)}
-            duration={1000 - 100}
-            color='success'
-          ></IonToast>
-          <IonToast
-            isOpen={isOpenWrongAnswer}
-            message='This answer is wrong'
-            onDidDismiss={() => setIsOpenWrongAnswer(false)}
-            duration={1000 - 100}
-            color='danger'
-          ></IonToast> */}
         </IonContent>
       </IonPage>
     </>

002_source/ionic_mobile/src/pages/ConnectiveRevision/SelectCategory.tsx

@@ -8,6 +8,7 @@ import { ConnectiveRevisionAllResult } from '../../contexts/ConnectiveRevisionRa
 import { useMyIonQuizContext } from '../../contexts/MyIonQuiz';
 import IConnectivesRevisionCategory from '../../interfaces/IConnectivesRevisionCategory';
 import { listConectivesRevisionContent } from '../../public_data/listConectivesRevisionContent';
+import useListQuizCRCategories from '../../hooks/useListQuizCRCategories';
 
 function ConnectiveRevisionSelectCategory() {
   const PAGE_TITLE = 'Connective Revision';
@@ -17,12 +18,12 @@ function ConnectiveRevisionSelectCategory() {
   let [categories, setCategories] = useState<IConnectivesRevisionCategory[] | []>([]);
   let { setTabActive, setConnectiveRevisionInProgress } = useAppStateContext();
 
-  useEffect(() => {
-    listConectivesRevisionContent().then((res_json) => {
-      setCategories(res_json);
-      setLoading(false);
-    });
-  }, []);
+  // useEffect(() => {
+  //   listConectivesRevisionContent().then((res_json) => {
+  //     setCategories(res_json);
+  //     setLoading(false);
+  //   });
+  // }, []);
 
   let { loadConnectiveRevisionScoreBoard } = useMyIonQuizContext();
   let [scoreboard_meta, setScoreboardMeta] = useState<ConnectiveRevisionAllResult>();
@@ -36,6 +37,14 @@ function ConnectiveRevisionSelectCategory() {
     setTabActive(QUIZ_MAIN_MENU_LINK);
   }, []);
 
+  let result = useListQuizCRCategories();
+  useEffect(() => {
+    if (result.status === 'success') {
+      setCategories(result.data.items);
+      setLoading(false);
+    }
+  }, [result]);
+
   if (loading) return <LoadingScreen />;
   if (!scoreboard_meta) return <LoadingScreen />;
 
@@ -87,36 +96,34 @@ function ConnectiveRevisionSelectCategory() {
             </div>
             <div>{'Question Bank'}</div>
             <div style={{ width: '80vw' }}>
-              {categories
-                .map((item) => item.cat_name)
-                .map((item_name, idx) => (
-                  <div style={{ margin: '0.9rem 0 0.9rem' }} key={idx}>
-                    <IonButton
-                      color="dark"
-                      fill="outline"
-                      expand="block"
-                      onClick={() => {
-                        setConnectiveRevisionInProgress(true);
-                        router.push(`${CONNECTIVE_REVISION_LINK}/r/${idx}`, 'none', 'replace');
+              {categories.map((item, idx) => (
+                <div style={{ margin: '0.9rem 0 0.9rem' }} key={idx}>
+                  <IonButton
+                    color="dark"
+                    fill="outline"
+                    expand="block"
+                    onClick={() => {
+                      setConnectiveRevisionInProgress(true);
+                      router.push(`${CONNECTIVE_REVISION_LINK}/r/${item.id}`, 'none', 'replace');
+                    }}
+                  >
+                    <div
+                      style={{
+                        display: 'flex',
+                        flexDirection: 'row',
+                        justifyContent: 'space-between',
+                        width: '100%',
                       }}
                     >
-                      <div
-                        style={{
-                          display: 'flex',
-                          flexDirection: 'row',
-                          justifyContent: 'space-between',
-                          width: '100%',
-                        }}
-                      >
-                        <div>{item_name}</div>
-                        <div>
-                          {scoreboard_meta[idx.toString()] || 0}
-                          {'%'}
-                        </div>
+                      <div>{item.cat_name}</div>
+                      <div>
+                        {scoreboard_meta[idx.toString()] || 0}
+                        {'%'}
                       </div>
-                    </IonButton>
-                  </div>
-                ))}
+                    </div>
+                  </IonButton>
+                </div>
+              ))}
             </div>
           </div>
         </IonContent>

002_source/ionic_mobile/src/types/QuizCRQuestion.ts

@@ -0,0 +1,33 @@
+/**
+ * Represents a Connectives Revision Quiz Question
+ */
+export interface QuizCRQuestion {
+  /** Unique identifier */
+  id: string;
+  /** Creation timestamp */
+  created: Date;
+  /** Last update timestamp */
+  updated: Date;
+  /** First half of the question */
+  question_fh: string;
+  /** Second half of the question */
+  question_sh: string;
+  /** Modal answer text */
+  modal_ans: string;
+  /** Initial answer text */
+  init_answer: string[];
+  /** Category ID reference */
+  cat_id: string;
+  /** Additional options in JSON format */
+  options: Record<string, unknown>;
+}
+
+/**
+ * Expanded QuizCRQuestion with related category data
+ */
+export interface QuizCRQuestionExpanded extends QuizCRQuestion {
+  /** Category name */
+  cat_name?: string;
+  /** Category image */
+  cat_image?: string;
+}