feat: add shared UI package auth DI

apps/app-frontend/src/App.vue

@@ -40,6 +40,7 @@ import {
 	OverflowMenu,
 	PopupNotificationPanel,
 	ProgressSpinner,
+	provideAuth,
 	provideModalBehavior,
 	provideModrinthClient,
 	provideNotificationManager,
@@ -57,7 +58,7 @@ import { openUrl } from '@tauri-apps/plugin-opener'
 import { type } from '@tauri-apps/plugin-os'
 import { saveWindowState, StateFlags } from '@tauri-apps/plugin-window-state'
 import { $fetch } from 'ofetch'
-import { computed, onMounted, onUnmounted, provide, ref, watch } from 'vue'
+import { computed, onMounted, onUnmounted, provide, reactive, ref, watch, watchEffect } from 'vue'
 import { RouterView, useRoute, useRouter } from 'vue-router'
 
 import ModrinthAppLogo from '@/assets/modrinth_app.svg?component'
@@ -454,6 +455,21 @@ const credentials = ref()
 
 const modrinthLoginFlowWaitModal = ref()
 
+const authProvider = reactive({
+	session_token: null,
+	user: null,
+	requestSignIn: async (_redirectPath) => {
+		await signIn()
+	},
+})
+
+watchEffect(() => {
+	authProvider.session_token = credentials.value?.session ?? null
+	authProvider.user = credentials.value?.user ?? null
+})
+
+provideAuth(authProvider)
+
 async function fetchCredentials() {
 	const creds = await getCreds().catch(handleError)
 	if (creds && creds.user_id) {

apps/frontend/src/providers/setup.ts

@@ -1,6 +1,7 @@
 import { provideNotificationManager } from '@modrinth/ui'
 
 import { FrontendNotificationManager } from './frontend-notifications'
+import { setupAuthProvider } from './setup/auth'
 import { setupFilePickerProvider } from './setup/file-picker'
 import { setupModrinthClientProvider } from './setup/modrinth-client'
 import { setupPageContextProvider } from './setup/page-context'
@@ -9,6 +10,7 @@ import { setupTagsProvider } from './setup/tags'
 export function setupProviders(auth: Awaited<ReturnType<typeof useAuth>>) {
 	provideNotificationManager(new FrontendNotificationManager())
 
+	setupAuthProvider(auth)
 	setupModrinthClientProvider(auth)
 	setupTagsProvider()
 	setupFilePickerProvider()

apps/frontend/src/providers/setup/auth.ts

@@ -0,0 +1,26 @@
+import type { Labrinth } from '@modrinth/api-client'
+import { type AuthProvider, provideAuth } from '@modrinth/ui'
+import { reactive, watchEffect } from 'vue'
+
+export function setupAuthProvider(auth: Awaited<ReturnType<typeof useAuth>>) {
+	const router = useRouter()
+	const authProvider = reactive<AuthProvider>({
+		session_token: null,
+		user: null,
+		requestSignIn: async (redirectPath: string) => {
+			await router.push({
+				path: '/auth/sign-in',
+				query: {
+					redirect: redirectPath,
+				},
+			})
+		},
+	})
+
+	watchEffect(() => {
+		authProvider.session_token = auth.value.token || null
+		authProvider.user = (auth.value.user as Labrinth.Users.v2.User | null) ?? null
+	})
+
+	provideAuth(authProvider)
+}