feat: instance default theme

packages/client/src/pages/admin/settings.vue

@@ -31,6 +31,16 @@
 				<template #caption>#RRGGBB</template>
 			</FormInput>
 
+			<FormTextarea v-model="defaultLightTheme" class="_formBlock">
+				<template #label>{{ $ts.instanceDefaultLightTheme }}</template>
+				<template #caption>{{ $ts.instanceDefaultThemeDescription }}</template>
+			</FormTextarea>
+
+			<FormTextarea v-model="defaultDarkTheme" class="_formBlock">
+				<template #label>{{ $ts.instanceDefaultDarkTheme }}</template>
+				<template #caption>{{ $ts.instanceDefaultThemeDescription }}</template>
+			</FormTextarea>
+
 			<FormInput v-model="tosUrl" class="_formBlock">
 				<template #prefix><i class="fas fa-link"></i></template>
 				<template #label>{{ $ts.tosUrl }}</template>
@@ -176,6 +186,8 @@ export default defineComponent({
 			bannerUrl: null,
 			backgroundImageUrl: null,
 			themeColor: null,
+			defaultLightTheme: null,
+			defaultDarkTheme: null,
 			enableLocalTimeline: false,
 			enableGlobalTimeline: false,
 			pinnedUsers: '',
@@ -202,6 +214,8 @@ export default defineComponent({
 			this.bannerUrl = meta.bannerUrl;
 			this.backgroundImageUrl = meta.backgroundImageUrl;
 			this.themeColor = meta.themeColor;
+			this.defaultLightTheme = meta.defaultLightTheme;
+			this.defaultDarkTheme = meta.defaultDarkTheme;
 			this.maintainerName = meta.maintainerName;
 			this.maintainerEmail = meta.maintainerEmail;
 			this.enableLocalTimeline = !meta.disableLocalTimeline;
@@ -228,6 +242,8 @@ export default defineComponent({
 				bannerUrl: this.bannerUrl,
 				backgroundImageUrl: this.backgroundImageUrl,
 				themeColor: this.themeColor === '' ? null : this.themeColor,
+				defaultLightTheme: this.defaultLightTheme === '' ? null : this.defaultLightTheme,
+				defaultDarkTheme: this.defaultDarkTheme === '' ? null : this.defaultDarkTheme,
 				maintainerName: this.maintainerName,
 				maintainerEmail: this.maintainerEmail,
 				disableLocalTimeline: !this.enableLocalTimeline,

packages/client/src/pages/settings/theme.vue

@@ -87,6 +87,7 @@
 
 <script lang="ts">
 import { computed, defineComponent, onActivated, onMounted, ref, watch } from 'vue';
+import * as JSON5 from 'json5';
 import FormSwitch from '@/components/form/switch.vue';
 import FormSelect from '@/components/form/select.vue';
 import FormGroup from '@/components/form/group.vue';
@@ -99,6 +100,8 @@ import { isDeviceDarkmode } from '@/scripts/is-device-darkmode';
 import { ColdDeviceStorage } from '@/store';
 import { i18n } from '@/i18n';
 import { defaultStore } from '@/store';
+import { instance } from '@/instance';
+import { concat } from '@/scripts/array';
 import { fetchThemes, getThemes } from '@/theme-store';
 import * as symbols from '@/symbols';
 
@@ -122,7 +125,10 @@ export default defineComponent({
 		};
 
 		const installedThemes = ref(getThemes());
-		const themes = computed(() => builtinThemes.concat(installedThemes.value));
+		const instanceThemes = [];
+		if (instance.defaultLightTheme != null) instanceThemes.push(JSON5.parse(instance.defaultLightTheme));
+		if (instance.defaultDarkTheme != null) instanceThemes.push(JSON5.parse(instance.defaultDarkTheme));
+		const themes = computed(() => instanceThemes.concat(builtinThemes.concat(installedThemes.value)));
 		const darkThemes = computed(() => themes.value.filter(t => t.base === 'dark' || t.kind === 'dark'));
 		const lightThemes = computed(() => themes.value.filter(t => t.base === 'light' || t.kind === 'light'));
 		const darkTheme = ColdDeviceStorage.ref('darkTheme');