diff --git a/backend/package.json b/backend/package.json
index 3a89eb87..40d49982 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -12,7 +12,7 @@
         "format": "prettier --write src/",
         "format-check": "prettier --check src/",
         "lint": "eslint . --fix",
-        "pretest:unit": "npm run build",
+        "pretest:unit": "tsx ../docs/api/generate.ts && npm run build",
         "test:unit": "vitest --run"
     },
     "dependencies": {
diff --git a/backend/src/controllers/teacher-invitations.ts b/backend/src/controllers/teacher-invitations.ts
index 4956f3e2..5f003f7f 100644
--- a/backend/src/controllers/teacher-invitations.ts
+++ b/backend/src/controllers/teacher-invitations.ts
@@ -1,6 +1,6 @@
 import { Request, Response } from 'express';
-import { requireFields } from './error-helper';
-import { createInvitation, deleteInvitation, getAllInvitations, getInvitation, updateInvitation } from '../services/teacher-invitations';
+import { requireFields } from './error-helper.js';
+import { createInvitation, deleteInvitation, getAllInvitations, getInvitation, updateInvitation } from '../services/teacher-invitations.js';
 import { TeacherInvitationData } from '@dwengo-1/common/interfaces/teacher-invitation';
 
 export async function getAllInvitationsHandler(req: Request, res: Response): Promise<void> {
diff --git a/backend/src/interfaces/group.ts b/backend/src/interfaces/group.ts
index 2a8287a3..792086d4 100644
--- a/backend/src/interfaces/group.ts
+++ b/backend/src/interfaces/group.ts
@@ -8,7 +8,7 @@ import { getGroupRepository } from '../data/repositories.js';
 import { AssignmentDTO } from '@dwengo-1/common/interfaces/assignment';
 import { Class } from '../entities/classes/class.entity.js';
 import { StudentDTO } from '@dwengo-1/common/interfaces/student';
-import { mapToClassDTO } from './class';
+import { mapToClassDTO } from './class.js';
 
 export function mapToGroup(groupDto: GroupDTO, clazz: Class): Group {
     const assignmentDto = groupDto.assignment as AssignmentDTO;
diff --git a/backend/src/interfaces/submission.ts b/backend/src/interfaces/submission.ts
index aa88f4a1..e179d458 100644
--- a/backend/src/interfaces/submission.ts
+++ b/backend/src/interfaces/submission.ts
@@ -2,9 +2,9 @@ import { Submission } from '../entities/assignments/submission.entity.js';
 import { mapToGroupDTO } from './group.js';
 import { mapToStudentDTO } from './student.js';
 import { SubmissionDTO, SubmissionDTOId } from '@dwengo-1/common/interfaces/submission';
-import { getSubmissionRepository } from '../data/repositories';
-import { Student } from '../entities/users/student.entity';
-import { Group } from '../entities/assignments/group.entity';
+import { getSubmissionRepository } from '../data/repositories.js';
+import { Student } from '../entities/users/student.entity.js';
+import { Group } from '../entities/assignments/group.entity.js';
 
 export function mapToSubmissionDTO(submission: Submission): SubmissionDTO {
     return {
diff --git a/backend/src/interfaces/teacher-invitation.ts b/backend/src/interfaces/teacher-invitation.ts
index 8fef17af..88b66f7a 100644
--- a/backend/src/interfaces/teacher-invitation.ts
+++ b/backend/src/interfaces/teacher-invitation.ts
@@ -1,9 +1,9 @@
 import { TeacherInvitation } from '../entities/classes/teacher-invitation.entity.js';
 import { mapToUserDTO } from './user.js';
 import { TeacherInvitationDTO } from '@dwengo-1/common/interfaces/teacher-invitation';
-import { getTeacherInvitationRepository } from '../data/repositories';
-import { Teacher } from '../entities/users/teacher.entity';
-import { Class } from '../entities/classes/class.entity';
+import { getTeacherInvitationRepository } from '../data/repositories.js';
+import { Teacher } from '../entities/users/teacher.entity.js';
+import { Class } from '../entities/classes/class.entity.js';
 import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 
 export function mapToTeacherInvitationDTO(invitation: TeacherInvitation): TeacherInvitationDTO {
diff --git a/backend/src/routes/teacher-invitations.ts b/backend/src/routes/teacher-invitations.ts
index 772b1351..23b943d0 100644
--- a/backend/src/routes/teacher-invitations.ts
+++ b/backend/src/routes/teacher-invitations.ts
@@ -5,7 +5,7 @@ import {
     getAllInvitationsHandler,
     getInvitationHandler,
     updateInvitationHandler,
-} from '../controllers/teacher-invitations';
+} from '../controllers/teacher-invitations.js';
 
 const router = express.Router({ mergeParams: true });
 
diff --git a/backend/src/services/questions.ts b/backend/src/services/questions.ts
index 49bf9e92..a16c277b 100644
--- a/backend/src/services/questions.ts
+++ b/backend/src/services/questions.ts
@@ -10,7 +10,7 @@ import { AnswerDTO, AnswerId } from '@dwengo-1/common/interfaces/answer';
 import { mapToAssignment } from '../interfaces/assignment.js';
 import { AssignmentDTO } from '@dwengo-1/common/interfaces/assignment';
 import { fetchStudent } from './students.js';
-import { NotFoundException } from '../exceptions/not-found-exception';
+import { NotFoundException } from '../exceptions/not-found-exception.js';
 import { FALLBACK_VERSION_NUM } from '../config.js';
 
 export async function getQuestionsAboutLearningObjectInAssignment(
diff --git a/backend/src/services/teacher-invitations.ts b/backend/src/services/teacher-invitations.ts
index 07f61bae..aead8715 100644
--- a/backend/src/services/teacher-invitations.ts
+++ b/backend/src/services/teacher-invitations.ts
@@ -1,11 +1,11 @@
-import { fetchTeacher } from './teachers';
-import { getTeacherInvitationRepository } from '../data/repositories';
-import { mapToInvitation, mapToTeacherInvitationDTO } from '../interfaces/teacher-invitation';
-import { addClassTeacher, fetchClass } from './classes';
+import { fetchTeacher } from './teachers.js';
+import { getTeacherInvitationRepository } from '../data/repositories.js';
+import { mapToInvitation, mapToTeacherInvitationDTO } from '../interfaces/teacher-invitation.js';
+import { addClassTeacher, fetchClass } from './classes.js';
 import { TeacherInvitationData, TeacherInvitationDTO } from '@dwengo-1/common/interfaces/teacher-invitation';
-import { ConflictException } from '../exceptions/conflict-exception';
-import { NotFoundException } from '../exceptions/not-found-exception';
-import { TeacherInvitation } from '../entities/classes/teacher-invitation.entity';
+import { ConflictException } from '../exceptions/conflict-exception.js';
+import { NotFoundException } from '../exceptions/not-found-exception.js';
+import { TeacherInvitation } from '../entities/classes/teacher-invitation.entity.js';
 import { ClassStatus } from '@dwengo-1/common/util/class-join-request';
 
 export async function getAllInvitations(username: string, sent: boolean): Promise<TeacherInvitationDTO[]> {
diff --git a/frontend/eslint.config.ts b/frontend/eslint.config.ts
index 9ca1a08b..b7f15371 100644
--- a/frontend/eslint.config.ts
+++ b/frontend/eslint.config.ts
@@ -21,7 +21,14 @@ const vueConfig = defineConfigWithVueTs(
 
     {
         name: "app/files-to-ignore",
-        ignores: ["**/dist/**", "**/dist-ssr/**", "**/coverage/**", "prettier.config.js"],
+        ignores: [
+            "**/dist/**",
+            "**/dist-ssr/**",
+            "**/coverage/**",
+            "prettier.config.js",
+            "**/test-results/**",
+            "**/playwright-report/**",
+        ],
     },
 
     pluginVue.configs["flat/essential"],
diff --git a/frontend/src/components/MenuBar.vue b/frontend/src/components/MenuBar.vue
index 328d607a..847dca84 100644
--- a/frontend/src/components/MenuBar.vue
+++ b/frontend/src/components/MenuBar.vue
@@ -80,13 +80,14 @@
             >
                 {{ t("classes") }}
             </v-btn>
-            <v-btn
-                class="menu_item"
-                variant="text"
-                to="/user/discussion"
-            >
-                {{ t("discussions") }}
-            </v-btn>
+            <!-- TODO Re-enable this button when the discussion page is ready -->
+            <!--            <v-btn-->
+            <!--                class="menu_item"-->
+            <!--                variant="text"-->
+            <!--                to="/user/discussion"-->
+            <!--            >-->
+            <!--                {{ t("discussions") }}-->
+            <!--            </v-btn>-->
             <v-menu open-on-hover>
                 <template v-slot:activator="{ props }">
                     <v-btn
diff --git a/frontend/src/queries/assignments.ts b/frontend/src/queries/assignments.ts
index 3251836a..8362faaa 100644
--- a/frontend/src/queries/assignments.ts
+++ b/frontend/src/queries/assignments.ts
@@ -15,16 +15,35 @@ import type { AssignmentDTO } from "@dwengo-1/common/interfaces/assignment";
 import type { QueryClient } from "@tanstack/react-query";
 import { invalidateAllSubmissionKeys } from "./submissions";
 
-function assignmentsQueryKey(classid: string, full: boolean) {
+type AssignmentsQueryKey = ["assignments", string, boolean];
+
+function assignmentsQueryKey(classid: string, full: boolean): AssignmentsQueryKey {
     return ["assignments", classid, full];
 }
-function assignmentQueryKey(classid: string, assignmentNumber: number) {
+
+type AssignmentQueryKey = ["assignment", string, number];
+
+function assignmentQueryKey(classid: string, assignmentNumber: number): AssignmentQueryKey {
     return ["assignment", classid, assignmentNumber];
 }
-function assignmentSubmissionsQueryKey(classid: string, assignmentNumber: number, full: boolean) {
+
+type AssignmentSubmissionsQueryKey = ["assignment-submissions", string, number, boolean];
+
+function assignmentSubmissionsQueryKey(
+    classid: string,
+    assignmentNumber: number,
+    full: boolean,
+): AssignmentSubmissionsQueryKey {
     return ["assignment-submissions", classid, assignmentNumber, full];
 }
-function assignmentQuestionsQueryKey(classid: string, assignmentNumber: number, full: boolean) {
+
+type AssignmentQuestionsQueryKey = ["assignment-questions", string, number, boolean];
+
+function assignmentQuestionsQueryKey(
+    classid: string,
+    assignmentNumber: number,
+    full: boolean,
+): AssignmentQuestionsQueryKey {
     return ["assignment-questions", classid, assignmentNumber, full];
 }
 
@@ -32,13 +51,15 @@ export async function invalidateAllAssignmentKeys(
     queryClient: QueryClient,
     classid?: string,
     assignmentNumber?: number,
-) {
+): Promise<void> {
     const keys = ["assignment", "assignment-submissions", "assignment-questions"];
 
-    for (const key of keys) {
-        const queryKey = [key, classid, assignmentNumber].filter((arg) => arg !== undefined);
-        await queryClient.invalidateQueries({ queryKey: queryKey });
-    }
+    await Promise.all(
+        keys.map(async (key) => {
+            const queryKey = [key, classid, assignmentNumber].filter((arg) => arg !== undefined);
+            return queryClient.invalidateQueries({ queryKey: queryKey });
+        }),
+    );
 
     await queryClient.invalidateQueries({ queryKey: ["assignments", classid].filter((arg) => arg !== undefined) });
 }
@@ -50,12 +71,20 @@ function checkEnabled(
 ): boolean {
     return Boolean(classid) && !isNaN(Number(groupNumber)) && !isNaN(Number(assignmentNumber));
 }
+
+interface Values {
+    cid: string | undefined;
+    an: number | undefined;
+    gn: number | undefined;
+    f: boolean;
+}
+
 function toValues(
     classid: MaybeRefOrGetter<string | undefined>,
     assignmentNumber: MaybeRefOrGetter<number | undefined>,
     groupNumber: MaybeRefOrGetter<number | undefined>,
     full: MaybeRefOrGetter<boolean>,
-) {
+): Values {
     return { cid: toValue(classid), an: toValue(assignmentNumber), gn: toValue(groupNumber), f: toValue(full) };
 }
 
diff --git a/frontend/src/queries/classes.ts b/frontend/src/queries/classes.ts
index 68ba0127..4bef8ad6 100644
--- a/frontend/src/queries/classes.ts
+++ b/frontend/src/queries/classes.ts
@@ -17,32 +17,51 @@ import { invalidateAllSubmissionKeys } from "./submissions";
 const classController = new ClassController();
 
 /* Query cache keys */
-function classesQueryKey(full: boolean) {
+type ClassesQueryKey = ["classes", boolean];
+
+function classesQueryKey(full: boolean): ClassesQueryKey {
     return ["classes", full];
 }
-function classQueryKey(classid: string) {
+
+type ClassQueryKey = ["class", string];
+
+function classQueryKey(classid: string): ClassQueryKey {
     return ["class", classid];
 }
-function classStudentsKey(classid: string, full: boolean) {
+
+type ClassStudentsKey = ["class-students", string, boolean];
+
+function classStudentsKey(classid: string, full: boolean): ClassStudentsKey {
     return ["class-students", classid, full];
 }
-function classTeachersKey(classid: string, full: boolean) {
+
+type ClassTeachersKey = ["class-teachers", string, boolean];
+
+function classTeachersKey(classid: string, full: boolean): ClassTeachersKey {
     return ["class-teachers", classid, full];
 }
-function classTeacherInvitationsKey(classid: string, full: boolean) {
+
+type ClassTeacherInvitationsKey = ["class-teacher-invitations", string, boolean];
+
+function classTeacherInvitationsKey(classid: string, full: boolean): ClassTeacherInvitationsKey {
     return ["class-teacher-invitations", classid, full];
 }
-function classAssignmentsKey(classid: string, full: boolean) {
+
+type ClassAssignmentsKey = ["class-assignments", string, boolean];
+
+function classAssignmentsKey(classid: string, full: boolean): ClassAssignmentsKey {
     return ["class-assignments", classid, full];
 }
 
-export async function invalidateAllClassKeys(queryClient: QueryClient, classid?: string) {
+export async function invalidateAllClassKeys(queryClient: QueryClient, classid?: string): Promise<void> {
     const keys = ["class", "class-students", "class-teachers", "class-teacher-invitations", "class-assignments"];
 
-    for (const key of keys) {
-        const queryKey = [key, classid].filter((arg) => arg !== undefined);
-        await queryClient.invalidateQueries({ queryKey: queryKey });
-    }
+    await Promise.all(
+        keys.map(async (key) => {
+            const queryKey = [key, classid].filter((arg) => arg !== undefined);
+            return queryClient.invalidateQueries({ queryKey: queryKey });
+        }),
+    );
 
     await queryClient.invalidateQueries({ queryKey: ["classes"] });
 }
diff --git a/frontend/src/queries/groups.ts b/frontend/src/queries/groups.ts
index cdef2899..2ac92348 100644
--- a/frontend/src/queries/groups.ts
+++ b/frontend/src/queries/groups.ts
@@ -1,4 +1,3 @@
-import type { ClassesResponse } from "@/controllers/classes";
 import { GroupController, type GroupResponse, type GroupsResponse } from "@/controllers/groups";
 import type { QuestionsResponse } from "@/controllers/questions";
 import type { SubmissionsResponse } from "@/controllers/submissions";
@@ -6,25 +5,45 @@ import type { GroupDTO } from "@dwengo-1/common/interfaces/group";
 import {
     QueryClient,
     useMutation,
+    type UseMutationReturnType,
     useQuery,
     useQueryClient,
-    type UseMutationReturnType,
     type UseQueryReturnType,
 } from "@tanstack/vue-query";
-import { computed, toValue, type MaybeRefOrGetter } from "vue";
-import { invalidateAllAssignmentKeys } from "./assignments";
+import { computed, type MaybeRefOrGetter, toValue } from "vue";
 import { invalidateAllSubmissionKeys } from "./submissions";
 
-export function groupsQueryKey(classid: string, assignmentNumber: number, full: boolean) {
+type GroupsQueryKey = ["groups", string, number, boolean];
+
+export function groupsQueryKey(classid: string, assignmentNumber: number, full: boolean): GroupsQueryKey {
     return ["groups", classid, assignmentNumber, full];
 }
-function groupQueryKey(classid: string, assignmentNumber: number, groupNumber: number) {
+
+type GroupQueryKey = ["group", string, number, number];
+
+function groupQueryKey(classid: string, assignmentNumber: number, groupNumber: number): GroupQueryKey {
     return ["group", classid, assignmentNumber, groupNumber];
 }
-function groupSubmissionsQueryKey(classid: string, assignmentNumber: number, groupNumber: number, full: boolean) {
+
+type GroupSubmissionsQueryKey = ["group-submissions", string, number, number, boolean];
+
+function groupSubmissionsQueryKey(
+    classid: string,
+    assignmentNumber: number,
+    groupNumber: number,
+    full: boolean,
+): GroupSubmissionsQueryKey {
     return ["group-submissions", classid, assignmentNumber, groupNumber, full];
 }
-function groupQuestionsQueryKey(classid: string, assignmentNumber: number, groupNumber: number, full: boolean) {
+
+type GroupQuestionsQueryKey = ["group-questions", string, number, number, boolean];
+
+function groupQuestionsQueryKey(
+    classid: string,
+    assignmentNumber: number,
+    groupNumber: number,
+    full: boolean,
+): GroupQuestionsQueryKey {
     return ["group-questions", classid, assignmentNumber, groupNumber, full];
 }
 
@@ -33,13 +52,14 @@ export async function invalidateAllGroupKeys(
     classid?: string,
     assignmentNumber?: number,
     groupNumber?: number,
-) {
+): Promise<void> {
     const keys = ["group", "group-submissions", "group-questions"];
-
-    for (const key of keys) {
-        const queryKey = [key, classid, assignmentNumber, groupNumber].filter((arg) => arg !== undefined);
-        await queryClient.invalidateQueries({ queryKey: queryKey });
-    }
+    await Promise.all(
+        keys.map(async (key) => {
+            const queryKey = [key, classid, assignmentNumber, groupNumber].filter((arg) => arg !== undefined);
+            return queryClient.invalidateQueries({ queryKey: queryKey });
+        }),
+    );
 
     await queryClient.invalidateQueries({
         queryKey: ["groups", classid, assignmentNumber].filter((arg) => arg !== undefined),
@@ -53,12 +73,20 @@ function checkEnabled(
 ): boolean {
     return Boolean(classid) && !isNaN(Number(groupNumber)) && !isNaN(Number(assignmentNumber));
 }
+
+interface Values {
+    cid: string | undefined;
+    an: number | undefined;
+    gn: number | undefined;
+    f: boolean;
+}
+
 function toValues(
     classid: MaybeRefOrGetter<string | undefined>,
     assignmentNumber: MaybeRefOrGetter<number | undefined>,
     groupNumber: MaybeRefOrGetter<number | undefined>,
     full: MaybeRefOrGetter<boolean>,
-) {
+): Values {
     return { cid: toValue(classid), an: toValue(assignmentNumber), gn: toValue(groupNumber), f: toValue(full) };
 }
 
diff --git a/frontend/src/queries/submissions.ts b/frontend/src/queries/submissions.ts
index 97effd15..b9e94e12 100644
--- a/frontend/src/queries/submissions.ts
+++ b/frontend/src/queries/submissions.ts
@@ -10,10 +10,25 @@ import {
 } from "@tanstack/vue-query";
 import { computed, toValue, type MaybeRefOrGetter } from "vue";
 
-function submissionsQueryKey(classid: string, assignmentNumber: number, groupNumber: number, full: boolean) {
+type SubmissionsQueryKey = ["submissions", string, number, number, boolean];
+
+function submissionsQueryKey(
+    classid: string,
+    assignmentNumber: number,
+    groupNumber: number,
+    full: boolean,
+): SubmissionsQueryKey {
     return ["submissions", classid, assignmentNumber, groupNumber, full];
 }
-function submissionQueryKey(classid: string, assignmentNumber: number, groupNumber: number, submissionNumber: number) {
+
+type SubmissionQueryKey = ["submission", string, number, number, number];
+
+function submissionQueryKey(
+    classid: string,
+    assignmentNumber: number,
+    groupNumber: number,
+    submissionNumber: number,
+): SubmissionQueryKey {
     return ["submission", classid, assignmentNumber, groupNumber, submissionNumber];
 }
 
@@ -23,15 +38,17 @@ export async function invalidateAllSubmissionKeys(
     assignmentNumber?: number,
     groupNumber?: number,
     submissionNumber?: number,
-) {
+): Promise<void> {
     const keys = ["submission"];
 
-    for (const key of keys) {
-        const queryKey = [key, classid, assignmentNumber, groupNumber, submissionNumber].filter(
-            (arg) => arg !== undefined,
-        );
-        await queryClient.invalidateQueries({ queryKey: queryKey });
-    }
+    await Promise.all(
+        keys.map(async (key) => {
+            const queryKey = [key, classid, assignmentNumber, groupNumber, submissionNumber].filter(
+                (arg) => arg !== undefined,
+            );
+            return queryClient.invalidateQueries({ queryKey: queryKey });
+        }),
+    );
 
     await queryClient.invalidateQueries({
         queryKey: ["submissions", classid, assignmentNumber, groupNumber].filter((arg) => arg !== undefined),
@@ -57,13 +74,22 @@ function checkEnabled(
         !isNaN(Number(submissionNumber))
     );
 }
+
+interface Values {
+    cid: string | undefined;
+    an: number | undefined;
+    gn: number | undefined;
+    sn: number | undefined;
+    f: boolean;
+}
+
 function toValues(
     classid: MaybeRefOrGetter<string | undefined>,
     assignmentNumber: MaybeRefOrGetter<number | undefined>,
     groupNumber: MaybeRefOrGetter<number | undefined>,
     submissionNumber: MaybeRefOrGetter<number | undefined>,
     full: MaybeRefOrGetter<boolean>,
-) {
+): Values {
     return {
         cid: toValue(classid),
         an: toValue(assignmentNumber),
@@ -93,7 +119,7 @@ export function useSubmissionQuery(
     assignmentNumber: MaybeRefOrGetter<number | undefined>,
     groupNumber: MaybeRefOrGetter<number | undefined>,
 ): UseQueryReturnType<SubmissionResponse, Error> {
-    const { cid, an, gn, sn, f } = toValues(classid, assignmentNumber, groupNumber, 1, true);
+    const { cid, an, gn, sn } = toValues(classid, assignmentNumber, groupNumber, 1, true);
 
     return useQuery({
         queryKey: computed(() => submissionQueryKey(cid!, an!, gn!, sn!)),
diff --git a/frontend/src/router/index.ts b/frontend/src/router/index.ts
index 23695680..e7aa8d24 100644
--- a/frontend/src/router/index.ts
+++ b/frontend/src/router/index.ts
@@ -7,7 +7,6 @@ import CreateClass from "@/views/classes/CreateClass.vue";
 import CreateAssignment from "@/views/assignments/CreateAssignment.vue";
 import CreateDiscussion from "@/views/discussions/CreateDiscussion.vue";
 import CallbackPage from "@/views/CallbackPage.vue";
-import UserDiscussions from "@/views/discussions/UserDiscussions.vue";
 import UserClasses from "@/views/classes/UserClasses.vue";
 import UserAssignments from "@/views/classes/UserAssignments.vue";
 import authState from "@/services/auth/auth-service.ts";
@@ -57,11 +56,12 @@ const router = createRouter({
                     name: "UserClasses",
                     component: UserClasses,
                 },
-                {
-                    path: "discussion",
-                    name: "UserDiscussions",
-                    component: UserDiscussions,
-                },
+                // TODO Re-enable this route when the discussion page is ready
+                // {
+                //     Path: "discussion",
+                //     Name: "UserDiscussions",
+                //     Component: UserDiscussions,
+                // },
             ],
         },