Remove all @firebase/util imports, replace uuidv4 with crypto.randomUUID

- Create src/utils/uuid.ts utility using crypto.randomUUID()
- Replace all uuidv4 imports from @firebase/util across 11 component files
- Replace base64 import in paypal.ts with Buffer-based implementation

Made-with: Cursor

src/components/ExamEditor/Exercises/Blanks/Letters/index.tsx

@@ -13,7 +13,7 @@ import validateBlanks from "../validateBlanks";
 import { toast } from "react-toastify";
 import setEditingAlert from "../../Shared/setEditingAlert";
 import PromptEdit from "../../Shared/PromptEdit";
-import { uuidv4 } from "@firebase/util";
+import { uuidv4 } from "@/utils/uuid";
 
 interface Word {
     letter: string;

src/components/ExamEditor/Exercises/Blanks/MultipleChoice/index.tsx

@@ -11,7 +11,7 @@ import { toast } from "react-toastify";
 import setEditingAlert from "../../Shared/setEditingAlert";
 import { MdEdit, MdEditOff } from "react-icons/md";
 import MCOption from "./MCOption";
-import { uuidv4 } from "@firebase/util";
+import { uuidv4 } from "@/utils/uuid";
 
 
 const FillBlanksMC: React.FC<{ exercise: FillBlanksExercise; sectionId: number }> = ({ exercise, sectionId }) => {

src/components/ExamEditor/Exercises/MatchSentences/index.tsx

@@ -18,7 +18,7 @@ import { toast } from 'react-toastify';
 import { DragEndEvent } from '@dnd-kit/core';
 import { handleMatchSentencesReorder } from '@/stores/examEditor/reorder/local';
 import PromptEdit from '../Shared/PromptEdit';
-import { uuidv4 } from '@firebase/util';
+import { uuidv4 } from '@/utils/uuid';
 
 const MatchSentences: React.FC<{ exercise: MatchSentencesExercise, sectionId: number }> = ({ exercise, sectionId }) => {
   const { currentModule, dispatch } = useExamEditorStore();

src/components/ExamEditor/Exercises/MultipleChoice/Underline/index.tsx

@@ -11,7 +11,7 @@ import { useCallback, useEffect, useState } from "react";
 import { MdAdd } from "react-icons/md";
 import Alert, { AlertItem } from "../../Shared/Alert";
 import PromptEdit from "../../Shared/PromptEdit";
-import { uuidv4 } from "@firebase/util";
+import { uuidv4 } from "@/utils/uuid";
 
 
 const UnderlineMultipleChoice: React.FC<{exercise: MultipleChoiceExercise, sectionId: number}> = ({

src/components/ExamEditor/Exercises/MultipleChoice/Vanilla/index.tsx

@@ -18,7 +18,7 @@ import SortableQuestion from '../../Shared/SortableQuestion';
 import setEditingAlert from '../../Shared/setEditingAlert';
 import { handleMultipleChoiceReorder } from '@/stores/examEditor/reorder/local';
 import PromptEdit from '../../Shared/PromptEdit';
-import { uuidv4 } from '@firebase/util';
+import { uuidv4 } from '@/utils/uuid';
 
 interface MultipleChoiceProps {
     exercise: MultipleChoiceExercise;

src/components/ExamEditor/Exercises/TrueFalse/index.tsx

@@ -16,7 +16,7 @@ import setEditingAlert from '../Shared/setEditingAlert';
 import { DragEndEvent } from '@dnd-kit/core';
 import { handleTrueFalseReorder } from '@/stores/examEditor/reorder/local';
 import PromptEdit from '../Shared/PromptEdit';
-import { uuidv4 } from '@firebase/util';
+import { uuidv4 } from '@/utils/uuid';
 
 const TrueFalse: React.FC<{ exercise: TrueFalseExercise, sectionId: number }> = ({ exercise, sectionId }) => {
     const { currentModule, dispatch } = useExamEditorStore();

src/components/ExamEditor/Exercises/WriteBlanks/index.tsx

@@ -22,7 +22,7 @@ import { validateEmptySolutions, validateQuestionText, validateWordCount } from
 import { handleWriteBlanksReorder } from '@/stores/examEditor/reorder/local';
 import { ParsedQuestion, parseText, reconstructText } from './parsing';
 import PromptEdit from '../Shared/PromptEdit';
-import { uuidv4 } from '@firebase/util';
+import { uuidv4 } from '@/utils/uuid';
 
 
 const WriteBlanks: React.FC<{ sectionId: number; exercise: WriteBlanksExercise; }> = ({ sectionId, exercise }) => {

src/components/ExamEditor/Exercises/WriteBlanksForm/index.tsx

@@ -17,7 +17,7 @@ import { validateQuestions, validateEmptySolutions, validateWordCount } from "./
 import Header from "../../Shared/Header";
 import BlanksFormEditor from "./BlanksFormEditor";
 import PromptEdit from "../Shared/PromptEdit";
-import { uuidv4 } from "@firebase/util";
+import { uuidv4 } from "@/utils/uuid";
 
 
 const WriteBlanksForm: React.FC<{ sectionId: number; exercise: WriteBlanksExercise }> = ({ sectionId, exercise }) => {

src/components/Medium/StatGridItem.tsx

@@ -7,7 +7,7 @@ import ai_usage from "@/utils/ai.detection";
 import { calculateBandScore, getGradingLabel } from "@/utils/score";
 import moment from "moment";
 import { Assignment } from "@/interfaces/results";
-import { uuidv4 } from "@firebase/util";
+import { uuidv4 } from "@/utils/uuid";
 import { useRouter } from "next/router";
 import { uniqBy } from "lodash";
 import { sortByModule } from "@/utils/moduleUtils";

src/pages/record.tsx

@@ -10,7 +10,7 @@ import moment from "moment";
 import { ToastContainer } from "react-toastify";
 import clsx from "clsx";
 import { shouldRedirectHome } from "@/utils/navigation.disabled";
-import { uuidv4 } from "@firebase/util";
+import { uuidv4 } from "@/utils/uuid";
 import { usePDFDownload } from "@/hooks/usePDFDownload";
 import useRecordStore from "@/stores/recordStore";
 import StatsGridItem from "@/components/Medium/StatGridItem";

src/pages/training/index.tsx

@@ -14,7 +14,7 @@ import useTrainingContentStore from "@/stores/trainingContentStore";
 import axios from "axios";
 import { ITrainingContent } from "@/training/TrainingInterfaces";
 import moment from "moment";
-import { uuidv4 } from "@firebase/util";
+import { uuidv4 } from "@/utils/uuid";
 import TrainingScore from "@/training/TrainingScore";
 import ModuleBadge from "@/components/ModuleBadge";
 import RecordFilter from "@/components/Medium/RecordFilter";

src/utils/paypal.ts

@@ -1,5 +1,5 @@
 import {TokenError, TokenSuccess} from "@/interfaces/paypal";
-import {base64} from "@firebase/util";
+const base64 = { encodeString: (s: string) => Buffer.from(s).toString("base64") };
 import axios from "axios";
 
 export const getAccessToken = async () => {

src/utils/uuid.ts

@@ -0,0 +1,3 @@
+export function uuidv4(): string {
+	return crypto.randomUUID();
+}