feat(server,web): migrate oauth settings from env to system config (#1061)

web/src/routes/admin/settings/+page.svelte

@@ -0,0 +1,33 @@
+<script lang="ts">
+	import FFmpegSettings from '$lib/components/admin-page/settings/ffmpeg/ffmpeg-settings.svelte';
+	import OAuthSettings from '$lib/components/admin-page/settings/oauth/oauth-settings.svelte';
+	import SettingAccordion from '$lib/components/admin-page/settings/setting-accordion.svelte';
+	import LoadingSpinner from '$lib/components/shared-components/loading-spinner.svelte';
+	import { api, SystemConfigDto } from '@api';
+
+	let systemConfig: SystemConfigDto;
+
+	const getConfig = async () => {
+		const { data } = await api.systemConfigApi.getConfig();
+		systemConfig = data;
+
+		return data;
+	};
+</script>
+
+<section class="">
+	{#await getConfig()}
+		<LoadingSpinner />
+	{:then configs}
+		<SettingAccordion
+			title="FFmpeg Settings"
+			subtitle="Manage the resolution and encoding information of the video files"
+		>
+			<FFmpegSettings ffmpegConfig={configs.ffmpeg} />
+		</SettingAccordion>
+
+		<SettingAccordion title="OAuth Settings" subtitle="Manage the OAuth integration to Immich app">
+			<OAuthSettings oauthConfig={configs.oauth} />
+		</SettingAccordion>
+	{/await}
+</section>