Merge branch 'appearance-tab' into 'develop'

Themes 3: Intermission: Appearance Tab and fixes

See merge request pleroma/pleroma-fe!1920

16 files changed, 870 insertions, 398 deletions

diff --git a/src/components/settings_modal/helpers/number_setting.vue b/src/components/settings_modal/helpers/number_setting.vue
index 23c1a5dd..32dc6f83 100644
--- a/src/components/settings_modal/helpers/number_setting.vue
+++ b/src/components/settings_modal/helpers/number_setting.vue
@@ -15,6 +15,7 @@
       </template>
       <slot v-else />
     </label>
+    {{ ' ' }}
     <input
       :id="path"
       class="input number-input"
diff --git a/src/components/settings_modal/helpers/setting.js b/src/components/settings_modal/helpers/setting.js
index abf9cfdf..3b3e6268 100644
--- a/src/components/settings_modal/helpers/setting.js
+++ b/src/components/settings_modal/helpers/setting.js
@@ -48,6 +48,10 @@ export default {
     draftMode: {
       type: Boolean,
       default: undefined
+    },
+    timedApplyMode: {
+      type: Boolean,
+      default: false
     }
   },
   inject: {
@@ -161,7 +165,11 @@ export default {
         case 'admin':
           return (k, v) => this.$store.dispatch('pushAdminSetting', { path: k, value: v })
         default:
-          return (k, v) => this.$store.dispatch('setOption', { name: k, value: v })
+          if (this.timedApplyMode) {
+            return (k, v) => this.$store.dispatch('setOptionTemporarily', { name: k, value: v })
+          } else {
+            return (k, v) => this.$store.dispatch('setOption', { name: k, value: v })
+          }
       }
     },
     defaultState () {
diff --git a/src/components/settings_modal/helpers/unit_setting.js b/src/components/settings_modal/helpers/unit_setting.js
index c9c23cb0..daeddd81 100644
--- a/src/components/settings_modal/helpers/unit_setting.js
+++ b/src/components/settings_modal/helpers/unit_setting.js
@@ -21,15 +21,23 @@ export default {
     unitSet: {
       type: String,
       default: 'none'
+    },
+    step: {
+      type: Number,
+      default: 1
+    },
+    resetDefault: {
+      type: Object,
+      default: null
     }
   },
   computed: {
     ...Setting.computed,
     stateUnit () {
-      return this.state.replace(/\d+/, '')
+      return typeof this.state === 'string' ? this.state.replace(/[0-9,.]+/, '') : ''
     },
     stateValue () {
-      return this.state.replace(/\D+/, '')
+      return typeof this.state === 'string' ? this.state.replace(/[^0-9,.]+/, '') : ''
     }
   },
   methods: {
@@ -39,10 +47,18 @@ export default {
       return this.$t(['settings', 'units', this.unitSet, value].join('.'))
     },
     updateValue (e) {
-      this.configSink(this.path, parseInt(e.target.value) + this.stateUnit)
+      this.configSink(this.path, parseFloat(e.target.value) + this.stateUnit)
     },
     updateUnit (e) {
-      this.configSink(this.path, this.stateValue + e.target.value)
+      let value = this.stateValue
+      const newUnit = e.target.value
+      if (this.resetDefault) {
+        const replaceValue = this.resetDefault[newUnit]
+        if (replaceValue != null) {
+          value = replaceValue
+        }
+      }
+      this.configSink(this.path, value + newUnit)
     }
   }
 }
diff --git a/src/components/settings_modal/helpers/unit_setting.vue b/src/components/settings_modal/helpers/unit_setting.vue
index 68f52b1c..40ab6880 100644
--- a/src/components/settings_modal/helpers/unit_setting.vue
+++ b/src/components/settings_modal/helpers/unit_setting.vue
@@ -9,11 +9,12 @@
     >
       <slot />
     </label>
+    {{ ' ' }}
     <input
       :id="path"
       class="input number-input"
       type="number"
-      step="1"
+      :step="step"
       :disabled="disabled"
       :min="min || 0"
       :value="stateValue"
diff --git a/src/components/settings_modal/settings_modal.js b/src/components/settings_modal/settings_modal.js
index ff58f2c3..63c9b24a 100644
--- a/src/components/settings_modal/settings_modal.js
+++ b/src/components/settings_modal/settings_modal.js
@@ -4,6 +4,7 @@ import AsyncComponentError from 'src/components/async_component_error/async_comp
 import getResettableAsyncComponent from 'src/services/resettable_async_component.js'
 import Popover from '../popover/popover.vue'
 import Checkbox from 'src/components/checkbox/checkbox.vue'
+import ConfirmModal from 'src/components/confirm_modal/confirm_modal.vue'
 import { library } from '@fortawesome/fontawesome-svg-core'
 import { cloneDeep, isEqual } from 'lodash'
 import {
@@ -53,6 +54,7 @@ const SettingsModal = {
     Modal,
     Popover,
     Checkbox,
+    ConfirmModal,
     SettingsModalUserContent: getResettableAsyncComponent(
       () => import('./settings_modal_user_content.vue'),
       {
@@ -165,6 +167,7 @@ const SettingsModal = {
   },
   computed: {
     currentSaveStateNotice () {
+      console.log(this.$store.state.interface.settings.currentSaveStateNotice)
       return this.$store.state.interface.settings.currentSaveStateNotice
     },
     modalActivated () {
diff --git a/src/components/settings_modal/settings_modal.vue b/src/components/settings_modal/settings_modal.vue
index 50859c94..90dbbde0 100644
--- a/src/components/settings_modal/settings_modal.vue
+++ b/src/components/settings_modal/settings_modal.vue
@@ -147,6 +147,18 @@
         </span>
       </div>
     </div>
+    <teleport to="#modal">
+      <ConfirmModal
+        v-if="$store.state.interface.temporaryChangesTimeoutId"
+        :title="$t('settings.confirm_new_setting')"
+        :cancel-text="$t('settings.revert')"
+        :confirm-text="$t('settings.confirm')"
+        @cancelled="$store.state.interface.temporaryChangesRevert"
+        @accepted="$store.state.interface.temporaryChangesConfirm"
+      >
+        {{ $t('settings.confirm_new_question') }}
+      </ConfirmModal>
+    </teleport>
   </Modal>
 </template>
 
diff --git a/src/components/settings_modal/settings_modal_user_content.js b/src/components/settings_modal/settings_modal_user_content.js
index 9ac0301f..ebd5329f 100644
--- a/src/components/settings_modal/settings_modal_user_content.js
+++ b/src/components/settings_modal/settings_modal_user_content.js
@@ -7,6 +7,7 @@ import FilteringTab from './tabs/filtering_tab.vue'
 import SecurityTab from './tabs/security_tab/security_tab.vue'
 import ProfileTab from './tabs/profile_tab.vue'
 import GeneralTab from './tabs/general_tab.vue'
+import AppearanceTab from './tabs/appearance_tab.vue'
 import VersionTab from './tabs/version_tab.vue'
 import ThemeTab from './tabs/theme_tab/theme_tab.vue'
 
@@ -19,7 +20,8 @@ import {
   faBell,
   faDownload,
   faEyeSlash,
-  faInfo
+  faInfo,
+  faWindowRestore
 } from '@fortawesome/free-solid-svg-icons'
 
 library.add(
@@ -30,7 +32,8 @@ library.add(
   faBell,
   faDownload,
   faEyeSlash,
-  faInfo
+  faInfo,
+  faWindowRestore
 )
 
 const SettingsModalContent = {
@@ -44,6 +47,7 @@ const SettingsModalContent = {
     SecurityTab,
     ProfileTab,
     GeneralTab,
+    AppearanceTab,
     VersionTab,
     ThemeTab
   },
diff --git a/src/components/settings_modal/settings_modal_user_content.vue b/src/components/settings_modal/settings_modal_user_content.vue
index 0221cccb..1441d892 100644
--- a/src/components/settings_modal/settings_modal_user_content.vue
+++ b/src/components/settings_modal/settings_modal_user_content.vue
@@ -14,6 +14,20 @@
       <GeneralTab />
     </div>
     <div
+      :label="$t('settings.appearance')"
+      icon="window-restore"
+      data-tab-name="appearance"
+    >
+      <AppearanceTab />
+    </div>
+    <div
+      :label="$t('settings.theme')"
+      icon="paint-brush"
+      data-tab-name="theme"
+    >
+      <ThemeTab />
+    </div>
+    <div
       v-if="isLoggedIn"
       :label="$t('settings.profile_tab')"
       icon="user"
@@ -23,6 +37,14 @@
     </div>
     <div
       v-if="isLoggedIn"
+      :label="$t('settings.notifications')"
+      icon="bell"
+      data-tab-name="notifications"
+    >
+      <NotificationsTab />
+    </div>
+    <div
+      v-if="isLoggedIn"
       :label="$t('settings.security_tab')"
       icon="lock"
       data-tab-name="security"
@@ -37,19 +59,13 @@
       <FilteringTab />
     </div>
     <div
-      :label="$t('settings.theme')"
-      icon="paint-brush"
-      data-tab-name="theme"
-    >
-      <ThemeTab />
-    </div>
-    <div
       v-if="isLoggedIn"
-      :label="$t('settings.notifications')"
-      icon="bell"
-      data-tab-name="notifications"
+      :label="$t('settings.mutes_and_blocks')"
+      :fullHeight="true"
+      icon="eye-slash"
+      data-tab-name="mutesAndBlocks"
     >
-      <NotificationsTab />
+      <MutesAndBlocksTab />
     </div>
     <div
       v-if="isLoggedIn"
@@ -60,15 +76,6 @@
       <DataImportExportTab />
     </div>
     <div
-      v-if="isLoggedIn"
-      :label="$t('settings.mutes_and_blocks')"
-      :fullHeight="true"
-      icon="eye-slash"
-      data-tab-name="mutesAndBlocks"
-    >
-      <MutesAndBlocksTab />
-    </div>
-    <div
       :label="$t('settings.version.title')"
       icon="info"
       data-tab-name="version"
diff --git a/src/components/settings_modal/tabs/appearance_tab.js b/src/components/settings_modal/tabs/appearance_tab.js
new file mode 100644
index 00000000..98d38288
--- /dev/null
+++ b/src/components/settings_modal/tabs/appearance_tab.js
@@ -0,0 +1,195 @@
+import BooleanSetting from '../helpers/boolean_setting.vue'
+import ChoiceSetting from '../helpers/choice_setting.vue'
+import IntegerSetting from '../helpers/integer_setting.vue'
+import FloatSetting from '../helpers/float_setting.vue'
+import UnitSetting, { defaultHorizontalUnits } from '../helpers/unit_setting.vue'
+
+import FontControl from 'src/components/font_control/font_control.vue'
+
+import { normalizeThemeData } from 'src/modules/interface'
+
+import {
+  getThemes
+} from 'src/services/style_setter/style_setter.js'
+import { convertTheme2To3 } from 'src/services/theme_data/theme2_to_theme3.js'
+import { init } from 'src/services/theme_data/theme_data_3.service.js'
+import {
+  getCssRules,
+  getScopedVersion
+} from 'src/services/theme_data/css_utils.js'
+
+import SharedComputedObject from '../helpers/shared_computed_object.js'
+import ProfileSettingIndicator from '../helpers/profile_setting_indicator.vue'
+import { library } from '@fortawesome/fontawesome-svg-core'
+import {
+  faGlobe
+} from '@fortawesome/free-solid-svg-icons'
+
+import Preview from './theme_tab/preview.vue'
+
+library.add(
+  faGlobe
+)
+
+const AppearanceTab = {
+  data () {
+    return {
+      availableStyles: [],
+      intersectionObserver: null,
+      thirdColumnModeOptions: ['none', 'notifications', 'postform'].map(mode => ({
+        key: mode,
+        value: mode,
+        label: this.$t(`settings.third_column_mode_${mode}`)
+      })),
+      forcedRoundnessOptions: ['disabled', 'sharp', 'nonsharp', 'round'].map((mode, i) => ({
+        key: mode,
+        value: i - 1,
+        label: this.$t(`settings.style.themes3.hacks.forced_roundness_mode_${mode}`)
+      })),
+      underlayOverrideModes: ['none', 'opaque', 'transparent'].map((mode, i) => ({
+        key: mode,
+        value: mode,
+        label: this.$t(`settings.style.themes3.hacks.underlay_override_mode_${mode}`)
+      }))
+    }
+  },
+  components: {
+    BooleanSetting,
+    ChoiceSetting,
+    IntegerSetting,
+    FloatSetting,
+    UnitSetting,
+    ProfileSettingIndicator,
+    FontControl,
+    Preview
+  },
+  mounted () {
+    getThemes()
+      .then((promises) => {
+        return Promise.all(
+          Object.entries(promises)
+            .map(([k, v]) => v.then(res => [k, res]))
+        )
+      })
+      .then(themes => themes.reduce((acc, [k, v]) => {
+        if (v) {
+          return [
+            ...acc,
+            {
+              name: v.name || v[0],
+              key: k,
+              data: v
+            }
+          ]
+        } else {
+          return acc
+        }
+      }, []))
+      .then((themesComplete) => {
+        this.availableStyles = themesComplete
+      })
+
+    if (window.IntersectionObserver) {
+      this.intersectionObserver = new IntersectionObserver((entries, observer) => {
+        entries.forEach(({ target, isIntersecting }) => {
+          if (!isIntersecting) return
+          const theme = this.availableStyles.find(x => x.key === target.dataset.themeKey)
+          this.$nextTick(() => {
+            if (theme) theme.ready = true
+          })
+          observer.unobserve(target)
+        })
+      }, {
+        root: this.$refs.themeList
+      })
+    }
+  },
+  updated () {
+    this.$nextTick(() => {
+      this.$refs.themeList.querySelectorAll('.theme-preview').forEach(node => {
+        this.intersectionObserver.observe(node)
+      })
+    })
+  },
+  computed: {
+    noIntersectionObserver () {
+      return !window.IntersectionObserver
+    },
+    horizontalUnits () {
+      return defaultHorizontalUnits
+    },
+    fontsOverride () {
+      return this.$store.getters.mergedConfig.fontsOverride
+    },
+    columns () {
+      const mode = this.$store.getters.mergedConfig.thirdColumnMode
+
+      const notif = mode === 'none' ? [] : ['notifs']
+
+      if (this.$store.getters.mergedConfig.sidebarRight || mode === 'postform') {
+        return [...notif, 'content', 'sidebar']
+      } else {
+        return ['sidebar', 'content', ...notif]
+      }
+    },
+    instanceSpecificPanelPresent () { return this.$store.state.instance.showInstanceSpecificPanel },
+    instanceWallpaperUsed () {
+      return this.$store.state.instance.background &&
+        !this.$store.state.users.currentUser.background_image
+    },
+    instanceShoutboxPresent () { return this.$store.state.instance.shoutAvailable },
+    language: {
+      get: function () { return this.$store.getters.mergedConfig.interfaceLanguage },
+      set: function (val) {
+        this.$store.dispatch('setOption', { name: 'interfaceLanguage', value: val })
+      }
+    },
+    isCustomThemeUsed () {
+      const { theme } = this.mergedConfig
+      return theme === 'custom' || theme === null
+    },
+    ...SharedComputedObject()
+  },
+  methods: {
+    updateFont (key, value) {
+      console.log(key, value)
+      this.$store.dispatch('setOption', {
+        name: 'theme3hacks',
+        value: {
+          ...this.mergedConfig.theme3hacks,
+          fonts: {
+            ...this.mergedConfig.theme3hacks.fonts,
+            [key]: value
+          }
+        }
+      })
+    },
+    isThemeActive (key) {
+      const { theme } = this.mergedConfig
+      return key === theme
+    },
+    setTheme (name) {
+      this.$store.dispatch('setTheme', { themeName: name, saveData: true, recompile: true })
+    },
+    previewTheme (key, input) {
+      const style = normalizeThemeData(input)
+      const x = 2
+      if (x === 1) return
+      const theme2 = convertTheme2To3(style)
+      const theme3 = init({
+        inputRuleset: theme2,
+        ultimateBackgroundColor: '#000000',
+        liteMode: true,
+        debug: true,
+        onlyNormalState: true
+      })
+
+      return getScopedVersion(
+        getCssRules(theme3.eager),
+        '#theme-preview-' + key
+      ).join('\n')
+    }
+  }
+}
+
+export default AppearanceTab
diff --git a/src/components/settings_modal/tabs/appearance_tab.vue b/src/components/settings_modal/tabs/appearance_tab.vue
new file mode 100644
index 00000000..55f0d1be
--- /dev/null
+++ b/src/components/settings_modal/tabs/appearance_tab.vue
@@ -0,0 +1,313 @@
+<template>
+  <div class="appearance-tab" :label="$t('settings.general')">
+    <div class="setting-item">
+      <h2>{{ $t('settings.theme') }}</h2>
+      <ul
+        class="theme-list"
+        ref="themeList"
+      >
+        <button
+          v-if="isCustomThemeUsed"
+          disabled
+          class="button-default theme-preview"
+        >
+          <preview />
+          <h4 class="theme-name">{{ $t('settings.style.custom_theme_used') }}</h4>
+        </button>
+        <button
+          v-for="style in availableStyles"
+          :data-theme-key="style.key"
+          :key="style.key"
+          class="button-default theme-preview"
+          :class="{ toggled: isThemeActive(style.key) }"
+          @click="setTheme(style.key)"
+        >
+          <!-- eslint-disable vue/no-v-text-v-html-on-component -->
+          <component
+            :is="'style'"
+            v-if="style.ready || noIntersectionObserver"
+            v-html="previewTheme(style.key, style.data)"
+          />
+          <!-- eslint-enable vue/no-v-text-v-html-on-component -->
+          <preview :class="{ placeholder: ready }" :id="'theme-preview-' + style.key"/>
+          <h4 class="theme-name">{{ style.name }}</h4>
+        </button>
+      </ul>
+    </div>
+    <div class="alert neutral theme-notice">
+      {{ $t("settings.style.appearance_tab_note") }}
+    </div>
+    <div class="setting-item">
+      <h2>{{ $t('settings.scale_and_layout') }}</h2>
+      <ul class="setting-list">
+        <li>
+          <UnitSetting
+            path="textSize"
+            step="0.1"
+            :units="['px', 'rem']"
+            :reset-default="{ 'px': 14, 'rem': 1 }"
+            timed-apply-mode
+          >
+            {{ $t('settings.text_size') }}
+          </UnitSetting>
+          <div>
+            <small>
+              <i18n-t
+                scope="global"
+                keypath="settings.text_size_tip"
+                tag="span"
+              >
+                <code>px</code>
+                <code>rem</code>
+              </i18n-t>
+              <br/>
+              <i18n-t
+                scope="global"
+                keypath="settings.text_size_tip2"
+                tag="span"
+              >
+                <code>14px</code>
+              </i18n-t>
+            </small>
+          </div>
+        </li>
+        <li>
+          <h3>{{ $t('settings.style.interface_font_user_override') }}</h3>
+          <ul class="setting-list">
+            <li>
+              <FontControl
+                :model-value="mergedConfig.theme3hacks.fonts.interface"
+                name="ui"
+                :label="$t('settings.style.fonts.components.interface')"
+                :fallback="{ family: 'sans-serif' }"
+                no-inherit="1"
+                @update:modelValue="v => updateFont('interface', v)"
+              />
+            </li>
+            <li>
+              <FontControl
+                v-if="expertLevel > 0"
+                :model-value="mergedConfig.theme3hacks.fonts.input"
+                name="input"
+                :fallback="{ family: 'inherit' }"
+                :label="$t('settings.style.fonts.components.input')"
+                @update:modelValue="v => updateFont('input', v)"
+              />
+            </li>
+            <li>
+              <FontControl
+                v-if="expertLevel > 0"
+                :model-value="mergedConfig.theme3hacks.fonts.post"
+                name="post"
+                :fallback="{ family: 'inherit' }"
+                :label="$t('settings.style.fonts.components.post')"
+                @update:modelValue="v => updateFont('post', v)"
+              />
+            </li>
+            <li>
+              <FontControl
+                v-if="expertLevel > 0"
+                :model-value="mergedConfig.theme3hacks.fonts.monospace"
+                name="postCode"
+                :fallback="{ family: 'monospace' }"
+                :label="$t('settings.style.fonts.components.monospace')"
+                @update:modelValue="v => updateFont('monospace', v)"
+              />
+            </li>
+          </ul>
+        </li>
+        <li>
+          <UnitSetting
+            path="emojiSize"
+            step="0.1"
+            :units="['px', 'rem']"
+            :reset-default="{ 'px': 32, 'rem': 2.2 }"
+          >
+            {{ $t('settings.emoji_size') }}
+          </UnitSetting>
+          <ul
+            class="setting-list suboptions"
+          >
+            <li>
+              <FloatSetting
+                v-if="user"
+                path="emojiReactionsScale"
+                expert="1"
+              >
+                {{ $t('settings.emoji_reactions_scale') }}
+              </FloatSetting>
+            </li>
+          </ul>
+        </li>
+        <li>
+          <UnitSetting
+            path="navbarSize"
+            step="0.1"
+            :units="['px', 'rem']"
+            :reset-default="{ 'px': 55, 'rem': 3.5 }"
+          >
+            {{ $t('settings.navbar_size') }}
+          </UnitSetting>
+        </li>
+        <h3>{{ $t('settings.columns') }}</h3>
+        <li>
+          <UnitSetting
+            path="panelHeaderSize"
+            step="0.1"
+            :units="['px', 'rem']"
+            :reset-default="{ 'px': 52, 'rem': 3.2 }"
+            timed-apply-mode
+          >
+            {{ $t('settings.panel_header_size') }}
+          </UnitSetting>
+        </li>
+        <li>
+          <BooleanSetting path="sidebarRight">
+            {{ $t('settings.right_sidebar') }}
+          </BooleanSetting>
+        </li>
+        <li>
+          <BooleanSetting path="navbarColumnStretch">
+            {{ $t('settings.navbar_column_stretch') }}
+          </BooleanSetting>
+        </li>
+        <li>
+          <ChoiceSetting
+            v-if="user"
+            id="thirdColumnMode"
+            path="thirdColumnMode"
+            :options="thirdColumnModeOptions"
+          >
+            {{ $t('settings.third_column_mode') }}
+          </ChoiceSetting>
+        </li>
+        <li v-if="expertLevel > 0">
+          {{ $t('settings.column_sizes') }}
+          <div class="column-settings">
+            <UnitSetting
+              v-for="column in columns"
+              :key="column"
+              :path="column + 'ColumnWidth'"
+              :units="horizontalUnits"
+              expert="1"
+            >
+              {{ $t('settings.column_sizes_' + column) }}
+            </UnitSetting>
+          </div>
+        </li>
+        <li>
+          <BooleanSetting path="disableStickyHeaders">
+            {{ $t('settings.disable_sticky_headers') }}
+          </BooleanSetting>
+        </li>
+        <li>
+          <BooleanSetting path="showScrollbars">
+            {{ $t('settings.show_scrollbars') }}
+          </BooleanSetting>
+        </li>
+      </ul>
+    </div>
+    <div class="setting-item">
+      <h2>{{ $t('settings.visual_tweaks') }}</h2>
+      <ul class="setting-list">
+        <li>
+          <ChoiceSetting
+            id="forcedRoundness"
+            path="forcedRoundness"
+            :options="forcedRoundnessOptions"
+          >
+            {{ $t('settings.style.themes3.hacks.force_interface_roundness') }}
+          </ChoiceSetting>
+        </li>
+        <li>
+          <ChoiceSetting
+            id="underlayOverride"
+            path="theme3hacks.underlay"
+            :options="underlayOverrideModes"
+          >
+            {{ $t('settings.style.themes3.hacks.underlay_overrides') }}
+          </ChoiceSetting>
+        </li>
+        <li v-if="instanceWallpaperUsed">
+          <BooleanSetting path="hideInstanceWallpaper">
+            {{ $t('settings.hide_wallpaper') }}
+          </BooleanSetting>
+        </li>
+        <li>
+          <BooleanSetting
+            path="forceThemeRecompilation"
+            :expert="1"
+          >
+            {{ $t('settings.force_theme_recompilation_debug') }}
+          </BooleanSetting>
+        </li>
+        <li>
+          <BooleanSetting
+            path="themeDebug"
+            :expert="1"
+          >
+            {{ $t('settings.theme_debug') }}
+          </BooleanSetting>
+        </li>
+      </ul>
+    </div>
+  </div>
+</template>
+
+<script src="./appearance_tab.js"></script>
+
+<style lang="scss">
+.appearance-tab {
+  .theme-notice {
+    padding: 0.5em;
+    margin: 1em;
+  }
+
+  .column-settings {
+    display: flex;
+    justify-content: space-evenly;
+    flex-wrap: wrap;
+  }
+
+  .column-settings .size-label {
+    display: block;
+    margin-bottom: 0.5em;
+    margin-top: 0.5em;
+  }
+
+  .theme-list {
+    list-style: none;
+    display: flex;
+    flex-wrap: wrap;
+    margin: -0.5em 0;
+    height: 25em;
+    overflow-x: hidden;
+    overflow-y: auto;
+    scrollbar-gutter: stable;
+    border-radius: var(--roundness);
+    border: 1px solid var(--border);
+    padding: 0;
+
+    .theme-preview {
+      font-size: 1rem; // fix for firefox
+      width: 19rem;
+      display: flex;
+      flex-direction: column;
+      align-items: center;
+      margin: 0.5em;
+
+      &.placeholder {
+        opacity: 0.2;
+      }
+
+      .preview-container {
+        pointer-events: none;
+        zoom: 0.5;
+        border: none;
+        border-radius: var(--roundness);
+        text-align: left;
+      }
+    }
+  }
+}
+</style>
diff --git a/src/components/settings_modal/tabs/general_tab.js b/src/components/settings_modal/tabs/general_tab.js
index 7d701d34..96caab07 100644
--- a/src/components/settings_modal/tabs/general_tab.js
+++ b/src/components/settings_modal/tabs/general_tab.js
@@ -3,7 +3,7 @@ import ChoiceSetting from '../helpers/choice_setting.vue'
 import ScopeSelector from 'src/components/scope_selector/scope_selector.vue'
 import IntegerSetting from '../helpers/integer_setting.vue'
 import FloatSetting from '../helpers/float_setting.vue'
-import UnitSetting, { defaultHorizontalUnits } from '../helpers/unit_setting.vue'
+import UnitSetting from '../helpers/unit_setting.vue'
 import InterfaceLanguageSwitcher from 'src/components/interface_language_switcher/interface_language_switcher.vue'
 
 import SharedComputedObject from '../helpers/shared_computed_object.js'
@@ -40,11 +40,6 @@ const GeneralTab = {
         value: mode,
         label: this.$t(`settings.mention_link_display_${mode}`)
       })),
-      thirdColumnModeOptions: ['none', 'notifications', 'postform'].map(mode => ({
-        key: mode,
-        value: mode,
-        label: this.$t(`settings.third_column_mode_${mode}`)
-      })),
       userPopoverAvatarActionOptions: ['close', 'zoom', 'open'].map(mode => ({
         key: mode,
         value: mode,
@@ -70,9 +65,6 @@ const GeneralTab = {
     ProfileSettingIndicator
   },
   computed: {
-    horizontalUnits () {
-      return defaultHorizontalUnits
-    },
     postFormats () {
       return this.$store.state.instance.postFormats || []
     },
@@ -83,29 +75,6 @@ const GeneralTab = {
         label: this.$t(`post_status.content_type["${format}"]`)
       }))
     },
-    columns () {
-      const mode = this.$store.getters.mergedConfig.thirdColumnMode
-
-      const notif = mode === 'none' ? [] : ['notifs']
-
-      if (this.$store.getters.mergedConfig.sidebarRight || mode === 'postform') {
-        return [...notif, 'content', 'sidebar']
-      } else {
-        return ['sidebar', 'content', ...notif]
-      }
-    },
-    instanceSpecificPanelPresent () { return this.$store.state.instance.showInstanceSpecificPanel },
-    instanceWallpaperUsed () {
-      return this.$store.state.instance.background &&
-        !this.$store.state.users.currentUser.background_image
-    },
-    instanceShoutboxPresent () { return this.$store.state.instance.shoutAvailable },
-    language: {
-      get: function () { return this.$store.getters.mergedConfig.interfaceLanguage },
-      set: function (val) {
-        this.$store.dispatch('setOption', { name: 'interfaceLanguage', value: val })
-      }
-    },
     ...SharedComputedObject()
   },
   methods: {
diff --git a/src/components/settings_modal/tabs/general_tab.vue b/src/components/settings_modal/tabs/general_tab.vue
index 208c49ee..4ece6cf4 100644
--- a/src/components/settings_modal/tabs/general_tab.vue
+++ b/src/components/settings_modal/tabs/general_tab.vue
@@ -15,11 +15,6 @@
             {{ $t('settings.hide_isp') }}
           </BooleanSetting>
         </li>
-        <li v-if="instanceWallpaperUsed">
-          <BooleanSetting path="hideInstanceWallpaper">
-            {{ $t('settings.hide_wallpaper') }}
-          </BooleanSetting>
-        </li>
         <li>
           <BooleanSetting path="stopGifs">
             {{ $t('settings.stop_gifs') }}
@@ -98,53 +93,6 @@
             {{ $t('settings.hide_shoutbox') }}
           </BooleanSetting>
         </li>
-        <li>
-          <h3>{{ $t('settings.columns') }}</h3>
-        </li>
-        <li>
-          <BooleanSetting path="disableStickyHeaders">
-            {{ $t('settings.disable_sticky_headers') }}
-          </BooleanSetting>
-        </li>
-        <li>
-          <BooleanSetting path="showScrollbars">
-            {{ $t('settings.show_scrollbars') }}
-          </BooleanSetting>
-        </li>
-        <li>
-          <BooleanSetting path="sidebarRight">
-            {{ $t('settings.right_sidebar') }}
-          </BooleanSetting>
-        </li>
-        <li>
-          <BooleanSetting path="navbarColumnStretch">
-            {{ $t('settings.navbar_column_stretch') }}
-          </BooleanSetting>
-        </li>
-        <li>
-          <ChoiceSetting
-            v-if="user"
-            id="thirdColumnMode"
-            path="thirdColumnMode"
-            :options="thirdColumnModeOptions"
-          >
-            {{ $t('settings.third_column_mode') }}
-          </ChoiceSetting>
-        </li>
-        <li v-if="expertLevel > 0">
-          {{ $t('settings.column_sizes') }}
-          <div class="column-settings">
-            <UnitSetting
-              v-for="column in columns"
-              :key="column"
-              :path="column + 'ColumnWidth'"
-              :units="horizontalUnits"
-              expert="1"
-            >
-              {{ $t('settings.column_sizes_' + column) }}
-            </UnitSetting>
-          </div>
-        </li>
         <li class="select-multiple">
           <span class="label">{{ $t('settings.confirm_dialogs') }}</span>
           <ul class="option-list">
@@ -201,14 +149,6 @@
       <h2>{{ $t('settings.post_look_feel') }}</h2>
       <ul class="setting-list">
         <li>
-          <BooleanSetting
-            path="forceThemeRecompilation"
-            :expert="1"
-          >
-            {{ $t('settings.force_theme_recompilation_debug') }}
-          </BooleanSetting>
-        </li>
-        <li>
           <ChoiceSetting
             id="conversationDisplay"
             path="conversationDisplay"
@@ -277,15 +217,6 @@
             {{ $t('settings.no_rich_text_description') }}
           </BooleanSetting>
         </li>
-        <li>
-          <FloatSetting
-            v-if="user"
-            path="emojiReactionsScale"
-            expert="1"
-          >
-            {{ $t('settings.emoji_reactions_scale') }}
-          </FloatSetting>
-        </li>
         <h3>{{ $t('settings.attachments') }}</h3>
         <li>
           <BooleanSetting
@@ -528,17 +459,3 @@
 </template>
 
 <script src="./general_tab.js"></script>
-
-<style lang="scss">
-.column-settings {
-  display: flex;
-  justify-content: space-evenly;
-  flex-wrap: wrap;
-}
-
-.column-settings .size-label {
-  display: block;
-  margin-bottom: 0.5em;
-  margin-top: 0.5em;
-}
-</style>
diff --git a/src/components/settings_modal/tabs/theme_tab/preview.vue b/src/components/settings_modal/tabs/theme_tab/preview.vue
index 1837620f..3fb0558b 100644
--- a/src/components/settings_modal/tabs/theme_tab/preview.vue
+++ b/src/components/settings_modal/tabs/theme_tab/preview.vue
@@ -99,15 +99,9 @@
         >
 
         <div class="actions">
-          <span class="checkbox">
-            <input
-              id="preview_checkbox"
-              checked="very yes"
-              type="checkbox"
-              class="input"
-            >
-            <label for="preview_checkbox">{{ $t('settings.style.preview.checkbox') }}</label>
-          </span>
+          <Checkbox>
+            {{ $t('settings.style.preview.checkbox') }}
+          </Checkbox>
           <button class="btn button-default">
             {{ $t('settings.style.preview.button') }}
           </button>
@@ -118,6 +112,7 @@
 </template>
 
 <script>
+import Checkbox from 'src/components/checkbox/checkbox.vue'
 import { library } from '@fortawesome/fontawesome-svg-core'
 import {
   faTimes,
@@ -133,12 +128,116 @@ library.add(
   faReply
 )
 
-export default {}
+export default {
+  components: {
+    Checkbox
+  }
+}
 </script>
 
 <style lang="scss">
 .preview-container {
   position: relative;
+  border-top: 1px dashed;
+  border-bottom: 1px dashed;
+  border-color: var(--border);
+  margin: 1em 0;
+  padding: 1em;
+  background-color: var(--wallpaper);
+  background-image: var(--body-background-image);
+  background-size: cover;
+  background-position: 50% 50%;
+
+  .theme-preview-content {
+    padding: 20px;
+  }
+
+  .dummy {
+    .post {
+      font-family: var(--postFont);
+      display: flex;
+
+      .content {
+        flex: 1;
+
+        h4 {
+          margin-bottom: 0.25em;
+        }
+
+        .icons {
+          margin-top: 0.5em;
+          display: flex;
+
+          i {
+            margin-right: 1em;
+          }
+        }
+      }
+    }
+
+    .after-post {
+      margin-top: 1em;
+      display: flex;
+      align-items: center;
+    }
+
+    .avatar,
+    .avatar-alt {
+      background:
+        linear-gradient(
+          135deg,
+          #b8e1fc 0%,
+          #a9d2f3 10%,
+          #90bae4 25%,
+          #90bcea 37%,
+          #90bff0 50%,
+          #6ba8e5 51%,
+          #a2daf5 83%,
+          #bdf3fd 100%
+        );
+      color: black;
+      font-family: sans-serif;
+      text-align: center;
+      margin-right: 1em;
+    }
+
+    .avatar-alt {
+      flex: 0 auto;
+      margin-left: 28px;
+      font-size: 12px;
+      min-width: 20px;
+      min-height: 20px;
+      line-height: 20px;
+    }
+
+    .avatar {
+      flex: 0 auto;
+      width: 48px;
+      height: 48px;
+      font-size: 14px;
+      line-height: 48px;
+    }
+
+    .actions {
+      display: flex;
+      align-items: baseline;
+
+      .checkbox {
+        margin-right: 1em;
+        flex: 1;
+      }
+    }
+
+    .separator {
+      margin: 1em;
+      border-bottom: 1px solid;
+      border-color: var(--border);
+    }
+
+    .btn {
+      min-width: 3em;
+    }
+  }
 }
 
 .underlay-preview {
@@ -148,4 +247,4 @@ export default {}
   left: 10px;
   right: 10px;
 }
-</style>
+ </style>
diff --git a/src/components/settings_modal/tabs/theme_tab/theme_tab.js b/src/components/settings_modal/tabs/theme_tab/theme_tab.js
index 11c90b03..39dc372e 100644
--- a/src/components/settings_modal/tabs/theme_tab/theme_tab.js
+++ b/src/components/settings_modal/tabs/theme_tab/theme_tab.js
@@ -1,7 +1,8 @@
 import {
   rgb2hex,
   hex2rgb,
-  getContrastRatioLayers
+  getContrastRatioLayers,
+  relativeLuminance
 } from 'src/services/color_convert/color_convert.js'
 import {
   getThemes
@@ -23,10 +24,17 @@ import {
   generateShadows,
   generateRadii,
   generateFonts,
-  composePreset,
   shadows2to3,
   colors2to3
 } from 'src/services/theme_data/theme_data.service.js'
+
+import { convertTheme2To3 } from 'src/services/theme_data/theme2_to_theme3.js'
+import { init } from 'src/services/theme_data/theme_data_3.service.js'
+import {
+  getCssRules,
+  getScopedVersion
+} from 'src/services/theme_data/css_utils.js'
+
 import ColorInput from 'src/components/color_input/color_input.vue'
 import RangeInput from 'src/components/range_input/range_input.vue'
 import OpacityInput from 'src/components/opacity_input/opacity_input.vue'
@@ -62,6 +70,7 @@ const colorConvert = (color) => {
 export default {
   data () {
     return {
+      themeV3Preview: [],
       themeImporter: newImporter({
         validator: this.importValidator,
         onImport: this.onImport,
@@ -78,10 +87,7 @@ export default {
       tempImportFile: undefined,
       engineVersion: 0,
 
-      previewShadows: {},
-      previewColors: {},
-      previewRadii: {},
-      previewFonts: {},
+      previewTheme: {},
 
       shadowsInvalid: true,
       colorsInvalid: true,
@@ -232,13 +238,6 @@ export default {
         chatMessage: this.chatMessageRadiusLocal
       }
     },
-    preview () {
-      return composePreset(this.previewColors, this.previewRadii, this.previewShadows, this.previewFonts)
-    },
-    previewTheme () {
-      if (!this.preview.theme.colors) return { colors: {}, opacity: {}, radii: {}, shadows: {}, fonts: {} }
-      return this.preview.theme
-    },
     // This needs optimization maybe
     previewContrast () {
       try {
@@ -306,14 +305,6 @@ export default {
         return {}
       }
     },
-    previewRules () {
-      if (!this.preview.rules) return ''
-      return [
-        ...Object.values(this.preview.rules),
-        'color: var(--text)',
-        'font-family: var(--interfaceFont, sans-serif)'
-      ].join(';')
-    },
     shadowsAvailable () {
       return Object.keys(DEFAULT_SHADOWS).sort()
     },
@@ -511,17 +502,14 @@ export default {
       }
     },
     setCustomTheme () {
-      this.$store.dispatch('setOption', {
-        name: 'customTheme',
-        value: {
+      this.$store.dispatch('setThemeV2', {
+        customTheme: {
+          ignore: true,
           themeFileVersion: this.selectedVersion,
           themeEngineVersion: CURRENT_VERSION,
           ...this.previewTheme
-        }
-      })
-      this.$store.dispatch('setOption', {
-        name: 'customThemeSource',
-        value: {
+        },
+        customThemeSource: {
           themeFileVersion: this.selectedVersion,
           themeEngineVersion: CURRENT_VERSION,
           shadows: this.shadowsLocal,
@@ -532,16 +520,24 @@ export default {
         }
       })
     },
-    updatePreviewColorsAndShadows () {
-      this.previewColors = generateColors({
+    updatePreviewColors () {
+      const result = generateColors({
         opacity: this.currentOpacity,
         colors: this.currentColors
       })
-      this.previewShadows = generateShadows(
-        { shadows: this.shadowsLocal, opacity: this.previewTheme.opacity, themeEngineVersion: this.engineVersion },
-        this.previewColors.theme.colors,
-        this.previewColors.mod
-      )
+      this.previewTheme.colors = result.theme.colors
+      this.previewTheme.opacity = result.theme.opacity
+    },
+    updatePreviewShadows () {
+      this.previewTheme.shadows = generateShadows(
+        {
+          shadows: this.shadowsLocal,
+          opacity: this.previewTheme.opacity,
+          themeEngineVersion: this.engineVersion
+        },
+        this.previewTheme.colors,
+        relativeLuminance(this.previewTheme.colors.bg) < 0.5 ? 1 : -1
+      ).theme.shadows
     },
     importTheme () { this.themeImporter.importData() },
     exportTheme () { this.themeExporter.exportData() },
@@ -610,7 +606,7 @@ export default {
     normalizeLocalState (theme, version = 0, source, forceSource = false) {
       let input
       if (typeof source !== 'undefined') {
-        if (forceSource || source.themeEngineVersion === CURRENT_VERSION) {
+        if (forceSource || source?.themeEngineVersion === CURRENT_VERSION) {
           input = source
           version = source.themeEngineVersion
         } else {
@@ -692,6 +688,8 @@ export default {
         } else {
           this.shadowsLocal = shadows
         }
+        this.updatePreviewColors()
+        this.updatePreviewShadows()
         this.shadowSelected = this.shadowsAvailable[0]
       }
 
@@ -699,12 +697,25 @@ export default {
         this.clearFonts()
         this.fontsLocal = fonts
       }
+    },
+    updateTheme3Preview () {
+      const theme2 = convertTheme2To3(this.previewTheme)
+      const theme3 = init({
+        inputRuleset: theme2,
+        ultimateBackgroundColor: '#000000',
+        liteMode: true
+      })
+
+      this.themeV3Preview = getScopedVersion(
+        getCssRules(theme3.eager),
+        '#theme-preview'
+      ).join('\n')
     }
   },
   watch: {
     currentRadii () {
       try {
-        this.previewRadii = generateRadii({ radii: this.currentRadii })
+        this.previewTheme.radii = generateRadii({ radii: this.currentRadii }).theme.radii
         this.radiiInvalid = false
       } catch (e) {
         this.radiiInvalid = true
@@ -713,9 +724,8 @@ export default {
     },
     shadowsLocal: {
       handler () {
-        if (Object.getOwnPropertyNames(this.previewColors).length === 1) return
         try {
-          this.updatePreviewColorsAndShadows()
+          this.updatePreviewShadows()
           this.shadowsInvalid = false
         } catch (e) {
           this.shadowsInvalid = true
@@ -727,7 +737,7 @@ export default {
     fontsLocal: {
       handler () {
         try {
-          this.previewFonts = generateFonts({ fonts: this.fontsLocal })
+          this.previewTheme.fonts = generateFonts({ fonts: this.fontsLocal }).theme.fonts
           this.fontsInvalid = false
         } catch (e) {
           this.fontsInvalid = true
@@ -738,18 +748,16 @@ export default {
     },
     currentColors () {
       try {
-        this.updatePreviewColorsAndShadows()
+        this.updatePreviewColors()
         this.colorsInvalid = false
-        this.shadowsInvalid = false
       } catch (e) {
         this.colorsInvalid = true
-        this.shadowsInvalid = true
         console.warn(e)
       }
     },
     currentOpacity () {
       try {
-        this.updatePreviewColorsAndShadows()
+        this.updatePreviewColors()
       } catch (e) {
         console.warn(e)
       }
diff --git a/src/components/settings_modal/tabs/theme_tab/theme_tab.scss b/src/components/settings_modal/tabs/theme_tab/theme_tab.scss
index 5e633120..84933fb8 100644
--- a/src/components/settings_modal/tabs/theme_tab/theme_tab.scss
+++ b/src/components/settings_modal/tabs/theme_tab/theme_tab.scss
@@ -1,4 +1,9 @@
 .theme-tab {
+  .deprecation-warning {
+    padding: 0.5em;
+    margin: 2em;
+  }
+
   padding-bottom: 2em;
 
   .preset-switcher {
@@ -10,6 +15,10 @@
     margin-right: 0.25em;
   }
 
+  .btn-group .btn {
+    margin: 0;
+  }
+
   .style-control {
     display: flex;
     align-items: baseline;
@@ -157,107 +166,6 @@
     }
   }
 
-  .preview-container {
-    border-top: 1px dashed;
-    border-bottom: 1px dashed;
-    border-color: var(--border);
-    margin: 1em 0;
-    padding: 1em;
-    background-color: var(--wallpaper);
-    background-image: var(--body-background-image);
-    background-size: cover;
-    background-position: 50% 50%;
-
-    .dummy {
-      .post {
-        font-family: var(--postFont);
-        display: flex;
-
-        .content {
-          flex: 1;
-
-          h4 {
-            margin-bottom: 0.25em;
-          }
-
-          .icons {
-            margin-top: 0.5em;
-            display: flex;
-
-            i {
-              margin-right: 1em;
-            }
-          }
-        }
-      }
-
-      .after-post {
-        margin-top: 1em;
-        display: flex;
-        align-items: center;
-      }
-
-      .avatar,
-      .avatar-alt {
-        background:
-          linear-gradient(
-            135deg,
-            #b8e1fc 0%,
-            #a9d2f3 10%,
-            #90bae4 25%,
-            #90bcea 37%,
-            #90bff0 50%,
-            #6ba8e5 51%,
-            #a2daf5 83%,
-            #bdf3fd 100%
-          );
-        color: black;
-        font-family: sans-serif;
-        text-align: center;
-        margin-right: 1em;
-      }
-
-      .avatar-alt {
-        flex: 0 auto;
-        margin-left: 28px;
-        font-size: 12px;
-        min-width: 20px;
-        min-height: 20px;
-        line-height: 20px;
-      }
-
-      .avatar {
-        flex: 0 auto;
-        width: 48px;
-        height: 48px;
-        font-size: 14px;
-        line-height: 48px;
-      }
-
-      .actions {
-        display: flex;
-        align-items: baseline;
-
-        .checkbox {
-          display: inline-flex;
-          align-items: baseline;
-          margin-right: 1em;
-          flex: 1;
-        }
-      }
-
-      .separator {
-        margin: 1em;
-        border-bottom: 1px solid;
-        border-color: var(--border);
-      }
-
-      .btn {
-        min-width: 3em;
-      }
-    }
-  }
-
   .radius-item {
     flex-basis: auto;
   }
@@ -310,10 +218,6 @@
     max-width: 50em;
   }
 
-  .theme-preview-content {
-    padding: 20px;
-  }
-
   .theme-warning {
     display: flex;
     align-items: baseline;
diff --git a/src/components/settings_modal/tabs/theme_tab/theme_tab.vue b/src/components/settings_modal/tabs/theme_tab/theme_tab.vue
index ff2fece9..4498c143 100644
--- a/src/components/settings_modal/tabs/theme_tab/theme_tab.vue
+++ b/src/components/settings_modal/tabs/theme_tab/theme_tab.vue
@@ -1,5 +1,8 @@
 <template>
   <div class="theme-tab">
+    <div class="alert warning deprecation-warning">
+      {{ $t("settings.style.themes2_outdated") }}
+    </div>
     <div class="presets-container">
       <div class="save-load">
         <div
@@ -120,7 +123,19 @@
       </div>
     </div>
 
-    <preview :style="previewRules" />
+    <!-- eslint-disable vue/no-v-text-v-html-on-component -->
+    <component :is="'style'" v-html="themeV3Preview"/>
+    <!-- eslint-enable vue/no-v-text-v-html-on-component -->
+    <preview id="theme-preview"/>
+
+    <div>
+      <button
+        class="btn button-default"
+        @click="updateTheme3Preview"
+      >
+        {{ $t("settings.style.update_preview") }}
+      </button>
+    </div>
 
     <keep-alive>
       <tab-switcher key="style-tweak">
@@ -156,7 +171,7 @@
             <OpacityInput
               v-model="bgOpacityLocal"
               name="bgOpacity"
-              :fallback="previewTheme.opacity.bg"
+              :fallback="previewTheme.opacity?.bg"
             />
             <ColorInput
               v-model="textColorLocal"
@@ -167,14 +182,14 @@
             <ColorInput
               v-model="accentColorLocal"
               name="accentColor"
-              :fallback="previewTheme.colors.link"
+              :fallback="previewTheme.colors?.link"
               :label="$t('settings.accent')"
               :show-optional-tickbox="typeof linkColorLocal !== 'undefined'"
             />
             <ColorInput
               v-model="linkColorLocal"
               name="linkColor"
-              :fallback="previewTheme.colors.accent"
+              :fallback="previewTheme.colors?.accent"
               :label="$t('settings.links')"
               :show-optional-tickbox="typeof accentColorLocal !== 'undefined'"
             />
@@ -190,13 +205,13 @@
               v-model="fgTextColorLocal"
               name="fgTextColor"
               :label="$t('settings.text')"
-              :fallback="previewTheme.colors.fgText"
+              :fallback="previewTheme.colors?.fgText"
             />
             <ColorInput
               v-model="fgLinkColorLocal"
               name="fgLinkColor"
               :label="$t('settings.links')"
-              :fallback="previewTheme.colors.fgLink"
+              :fallback="previewTheme.colors?.fgLink"
             />
             <p>{{ $t('settings.style.common_colors.foreground_hint') }}</p>
           </div>
@@ -256,14 +271,14 @@
             <ColorInput
               v-model="postLinkColorLocal"
               name="postLinkColor"
-              :fallback="previewTheme.colors.accent"
+              :fallback="previewTheme.colors?.accent"
               :label="$t('settings.links')"
             />
             <ContrastRatio :contrast="previewContrast.postLink" />
             <ColorInput
               v-model="postGreentextColorLocal"
               name="postGreentextColor"
-              :fallback="previewTheme.colors.cGreen"
+              :fallback="previewTheme.colors?.cGreen"
               :label="$t('settings.greentext')"
             />
             <ContrastRatio :contrast="previewContrast.postGreentext" />
@@ -272,13 +287,13 @@
               v-model="alertErrorColorLocal"
               name="alertError"
               :label="$t('settings.style.advanced_colors.alert_error')"
-              :fallback="previewTheme.colors.alertError"
+              :fallback="previewTheme.colors?.alertError"
             />
             <ColorInput
               v-model="alertErrorTextColorLocal"
               name="alertErrorText"
               :label="$t('settings.text')"
-              :fallback="previewTheme.colors.alertErrorText"
+              :fallback="previewTheme.colors?.alertErrorText"
             />
             <ContrastRatio
               :contrast="previewContrast.alertErrorText"
@@ -288,13 +303,13 @@
               v-model="alertWarningColorLocal"
               name="alertWarning"
               :label="$t('settings.style.advanced_colors.alert_warning')"
-              :fallback="previewTheme.colors.alertWarning"
+              :fallback="previewTheme.colors?.alertWarning"
             />
             <ColorInput
               v-model="alertWarningTextColorLocal"
               name="alertWarningText"
               :label="$t('settings.text')"
-              :fallback="previewTheme.colors.alertWarningText"
+              :fallback="previewTheme.colors?.alertWarningText"
             />
             <ContrastRatio
               :contrast="previewContrast.alertWarningText"
@@ -304,13 +319,13 @@
               v-model="alertNeutralColorLocal"
               name="alertNeutral"
               :label="$t('settings.style.advanced_colors.alert_neutral')"
-              :fallback="previewTheme.colors.alertNeutral"
+              :fallback="previewTheme.colors?.alertNeutral"
             />
             <ColorInput
               v-model="alertNeutralTextColorLocal"
               name="alertNeutralText"
               :label="$t('settings.text')"
-              :fallback="previewTheme.colors.alertNeutralText"
+              :fallback="previewTheme.colors?.alertNeutralText"
             />
             <ContrastRatio
               :contrast="previewContrast.alertNeutralText"
@@ -319,7 +334,7 @@
             <OpacityInput
               v-model="alertOpacityLocal"
               name="alertOpacity"
-              :fallback="previewTheme.opacity.alert"
+              :fallback="previewTheme.opacity?.alert"
             />
           </div>
           <div class="color-item">
@@ -328,13 +343,13 @@
               v-model="badgeNotificationColorLocal"
               name="badgeNotification"
               :label="$t('settings.style.advanced_colors.badge_notification')"
-              :fallback="previewTheme.colors.badgeNotification"
+              :fallback="previewTheme.colors?.badgeNotification"
             />
             <ColorInput
               v-model="badgeNotificationTextColorLocal"
               name="badgeNotificationText"
               :label="$t('settings.text')"
-              :fallback="previewTheme.colors.badgeNotificationText"
+              :fallback="previewTheme.colors?.badgeNotificationText"
             />
             <ContrastRatio
               :contrast="previewContrast.badgeNotificationText"
@@ -346,19 +361,19 @@
             <ColorInput
               v-model="panelColorLocal"
               name="panelColor"
-              :fallback="previewTheme.colors.panel"
+              :fallback="previewTheme.colors?.panel"
               :label="$t('settings.background')"
             />
             <OpacityInput
               v-model="panelOpacityLocal"
               name="panelOpacity"
-              :fallback="previewTheme.opacity.panel"
+              :fallback="previewTheme.opacity?.panel"
               :disabled="panelColorLocal === 'transparent'"
             />
             <ColorInput
               v-model="panelTextColorLocal"
               name="panelTextColor"
-              :fallback="previewTheme.colors.panelText"
+              :fallback="previewTheme.colors?.panelText"
               :label="$t('settings.text')"
             />
             <ContrastRatio
@@ -368,7 +383,7 @@
             <ColorInput
               v-model="panelLinkColorLocal"
               name="panelLinkColor"
-              :fallback="previewTheme.colors.panelLink"
+              :fallback="previewTheme.colors?.panelLink"
               :label="$t('settings.links')"
             />
             <ContrastRatio
@@ -381,20 +396,20 @@
             <ColorInput
               v-model="topBarColorLocal"
               name="topBarColor"
-              :fallback="previewTheme.colors.topBar"
+              :fallback="previewTheme.colors?.topBar"
               :label="$t('settings.background')"
             />
             <ColorInput
               v-model="topBarTextColorLocal"
               name="topBarTextColor"
-              :fallback="previewTheme.colors.topBarText"
+              :fallback="previewTheme.colors?.topBarText"
               :label="$t('settings.text')"
             />
             <ContrastRatio :contrast="previewContrast.topBarText" />
             <ColorInput
               v-model="topBarLinkColorLocal"
               name="topBarLinkColor"
-              :fallback="previewTheme.colors.topBarLink"
+              :fallback="previewTheme.colors?.topBarLink"
               :label="$t('settings.links')"
             />
             <ContrastRatio :contrast="previewContrast.topBarLink" />
@@ -404,19 +419,19 @@
             <ColorInput
               v-model="inputColorLocal"
               name="inputColor"
-              :fallback="previewTheme.colors.input"
+              :fallback="previewTheme.colors?.input"
               :label="$t('settings.background')"
             />
             <OpacityInput
               v-model="inputOpacityLocal"
               name="inputOpacity"
-              :fallback="previewTheme.opacity.input"
+              :fallback="previewTheme.opacity?.input"
               :disabled="inputColorLocal === 'transparent'"
             />
             <ColorInput
               v-model="inputTextColorLocal"
               name="inputTextColor"
-              :fallback="previewTheme.colors.inputText"
+              :fallback="previewTheme.colors?.inputText"
               :label="$t('settings.text')"
             />
             <ContrastRatio :contrast="previewContrast.inputText" />
@@ -426,33 +441,33 @@
             <ColorInput
               v-model="btnColorLocal"
               name="btnColor"
-              :fallback="previewTheme.colors.btn"
+              :fallback="previewTheme.colors?.btn"
               :label="$t('settings.background')"
             />
             <OpacityInput
               v-model="btnOpacityLocal"
               name="btnOpacity"
-              :fallback="previewTheme.opacity.btn"
+              :fallback="previewTheme.opacity?.btn"
               :disabled="btnColorLocal === 'transparent'"
             />
             <ColorInput
               v-model="btnTextColorLocal"
               name="btnTextColor"
-              :fallback="previewTheme.colors.btnText"
+              :fallback="previewTheme.colors?.btnText"
               :label="$t('settings.text')"
             />
             <ContrastRatio :contrast="previewContrast.btnText" />
             <ColorInput
               v-model="btnPanelTextColorLocal"
               name="btnPanelTextColor"
-              :fallback="previewTheme.colors.btnPanelText"
+              :fallback="previewTheme.colors?.btnPanelText"
               :label="$t('settings.style.advanced_colors.panel_header')"
             />
             <ContrastRatio :contrast="previewContrast.btnPanelText" />
             <ColorInput
               v-model="btnTopBarTextColorLocal"
               name="btnTopBarTextColor"
-              :fallback="previewTheme.colors.btnTopBarText"
+              :fallback="previewTheme.colors?.btnTopBarText"
               :label="$t('settings.style.advanced_colors.top_bar')"
             />
             <ContrastRatio :contrast="previewContrast.btnTopBarText" />
@@ -460,27 +475,27 @@
             <ColorInput
               v-model="btnPressedColorLocal"
               name="btnPressedColor"
-              :fallback="previewTheme.colors.btnPressed"
+              :fallback="previewTheme.colors?.btnPressed"
               :label="$t('settings.background')"
             />
             <ColorInput
               v-model="btnPressedTextColorLocal"
               name="btnPressedTextColor"
-              :fallback="previewTheme.colors.btnPressedText"
+              :fallback="previewTheme.colors?.btnPressedText"
               :label="$t('settings.text')"
             />
             <ContrastRatio :contrast="previewContrast.btnPressedText" />
             <ColorInput
               v-model="btnPressedPanelTextColorLocal"
               name="btnPressedPanelTextColor"
-              :fallback="previewTheme.colors.btnPressedPanelText"
+              :fallback="previewTheme.colors?.btnPressedPanelText"
               :label="$t('settings.style.advanced_colors.panel_header')"
             />
             <ContrastRatio :contrast="previewContrast.btnPressedPanelText" />
             <ColorInput
               v-model="btnPressedTopBarTextColorLocal"
               name="btnPressedTopBarTextColor"
-              :fallback="previewTheme.colors.btnPressedTopBarText"
+              :fallback="previewTheme.colors?.btnPressedTopBarText"
               :label="$t('settings.style.advanced_colors.top_bar')"
             />
             <ContrastRatio :contrast="previewContrast.btnPressedTopBarText" />
@@ -488,52 +503,52 @@
             <ColorInput
               v-model="btnDisabledColorLocal"
               name="btnDisabledColor"
-              :fallback="previewTheme.colors.btnDisabled"
+              :fallback="previewTheme.colors?.btnDisabled"
               :label="$t('settings.background')"
             />
             <ColorInput
               v-model="btnDisabledTextColorLocal"
               name="btnDisabledTextColor"
-              :fallback="previewTheme.colors.btnDisabledText"
+              :fallback="previewTheme.colors?.btnDisabledText"
               :label="$t('settings.text')"
             />
             <ColorInput
               v-model="btnDisabledPanelTextColorLocal"
               name="btnDisabledPanelTextColor"
-              :fallback="previewTheme.colors.btnDisabledPanelText"
+              :fallback="previewTheme.colors?.btnDisabledPanelText"
               :label="$t('settings.style.advanced_colors.panel_header')"
             />
             <ColorInput
               v-model="btnDisabledTopBarTextColorLocal"
               name="btnDisabledTopBarTextColor"
-              :fallback="previewTheme.colors.btnDisabledTopBarText"
+              :fallback="previewTheme.colors?.btnDisabledTopBarText"
               :label="$t('settings.style.advanced_colors.top_bar')"
             />
             <h5>{{ $t('settings.style.advanced_colors.toggled') }}</h5>
             <ColorInput
               v-model="btnToggledColorLocal"
               name="btnToggledColor"
-              :fallback="previewTheme.colors.btnToggled"
+              :fallback="previewTheme.colors?.btnToggled"
               :label="$t('settings.background')"
             />
             <ColorInput
               v-model="btnToggledTextColorLocal"
               name="btnToggledTextColor"
-              :fallback="previewTheme.colors.btnToggledText"
+              :fallback="previewTheme.colors?.btnToggledText"
               :label="$t('settings.text')"
             />
             <ContrastRatio :contrast="previewContrast.btnToggledText" />
             <ColorInput
               v-model="btnToggledPanelTextColorLocal"
               name="btnToggledPanelTextColor"
-              :fallback="previewTheme.colors.btnToggledPanelText"
+              :fallback="previewTheme.colors?.btnToggledPanelText"
               :label="$t('settings.style.advanced_colors.panel_header')"
             />
             <ContrastRatio :contrast="previewContrast.btnToggledPanelText" />
             <ColorInput
               v-model="btnToggledTopBarTextColorLocal"
               name="btnToggledTopBarTextColor"
-              :fallback="previewTheme.colors.btnToggledTopBarText"
+              :fallback="previewTheme.colors?.btnToggledTopBarText"
               :label="$t('settings.style.advanced_colors.top_bar')"
             />
             <ContrastRatio :contrast="previewContrast.btnToggledTopBarText" />
@@ -543,20 +558,20 @@
             <ColorInput
               v-model="tabColorLocal"
               name="tabColor"
-              :fallback="previewTheme.colors.tab"
+              :fallback="previewTheme.colors?.tab"
               :label="$t('settings.background')"
             />
             <ColorInput
               v-model="tabTextColorLocal"
               name="tabTextColor"
-              :fallback="previewTheme.colors.tabText"
+              :fallback="previewTheme.colors?.tabText"
               :label="$t('settings.text')"
             />
             <ContrastRatio :contrast="previewContrast.tabText" />
             <ColorInput
               v-model="tabActiveTextColorLocal"
               name="tabActiveTextColor"
-              :fallback="previewTheme.colors.tabActiveText"
+              :fallback="previewTheme.colors?.tabActiveText"
               :label="$t('settings.text')"
             />
             <ContrastRatio :contrast="previewContrast.tabActiveText" />
@@ -566,13 +581,13 @@
             <ColorInput
               v-model="borderColorLocal"
               name="borderColor"
-              :fallback="previewTheme.colors.border"
+              :fallback="previewTheme.colors?.border"
               :label="$t('settings.style.common.color')"
             />
             <OpacityInput
               v-model="borderOpacityLocal"
               name="borderOpacity"
-              :fallback="previewTheme.opacity.border"
+              :fallback="previewTheme.opacity?.border"
               :disabled="borderColorLocal === 'transparent'"
             />
           </div>
@@ -581,25 +596,25 @@
             <ColorInput
               v-model="faintColorLocal"
               name="faintColor"
-              :fallback="previewTheme.colors.faint"
+              :fallback="previewTheme.colors?.faint"
               :label="$t('settings.text')"
             />
             <ColorInput
               v-model="faintLinkColorLocal"
               name="faintLinkColor"
-              :fallback="previewTheme.colors.faintLink"
+              :fallback="previewTheme.colors?.faintLink"
               :label="$t('settings.links')"
             />
             <ColorInput
               v-model="panelFaintColorLocal"
               name="panelFaintColor"
-              :fallback="previewTheme.colors.panelFaint"
+              :fallback="previewTheme.colors?.panelFaint"
               :label="$t('settings.style.advanced_colors.panel_header')"
             />
             <OpacityInput
               v-model="faintOpacityLocal"
               name="faintOpacity"
-              :fallback="previewTheme.opacity.faint"
+              :fallback="previewTheme.opacity?.faint"
             />
           </div>
           <div class="color-item">
@@ -608,12 +623,12 @@
               v-model="underlayColorLocal"
               name="underlay"
               :label="$t('settings.style.advanced_colors.underlay')"
-              :fallback="previewTheme.colors.underlay"
+              :fallback="previewTheme.colors?.underlay"
             />
             <OpacityInput
               v-model="underlayOpacityLocal"
               name="underlayOpacity"
-              :fallback="previewTheme.opacity.underlay"
+              :fallback="previewTheme.opacity?.underlay"
               :disabled="underlayOpacityLocal === 'transparent'"
             />
           </div>
@@ -623,7 +638,7 @@
               v-model="wallpaperColorLocal"
               name="wallpaper"
               :label="$t('settings.style.advanced_colors.wallpaper')"
-              :fallback="previewTheme.colors.wallpaper"
+              :fallback="previewTheme.colors?.wallpaper"
             />
           </div>
           <div class="color-item">
@@ -632,13 +647,13 @@
               v-model="pollColorLocal"
               name="poll"
               :label="$t('settings.background')"
-              :fallback="previewTheme.colors.poll"
+              :fallback="previewTheme.colors?.poll"
             />
             <ColorInput
               v-model="pollTextColorLocal"
               name="pollText"
               :label="$t('settings.text')"
-              :fallback="previewTheme.colors.pollText"
+              :fallback="previewTheme.colors?.pollText"
             />
           </div>
           <div class="color-item">
@@ -647,7 +662,7 @@
               v-model="iconColorLocal"
               name="icon"
               :label="$t('settings.style.advanced_colors.icons')"
-              :fallback="previewTheme.colors.icon"
+              :fallback="previewTheme.colors?.icon"
             />
           </div>
           <div class="color-item">
@@ -656,20 +671,20 @@
               v-model="highlightColorLocal"
               name="highlight"
               :label="$t('settings.background')"
-              :fallback="previewTheme.colors.highlight"
+              :fallback="previewTheme.colors?.highlight"
             />
             <ColorInput
               v-model="highlightTextColorLocal"
               name="highlightText"
               :label="$t('settings.text')"
-              :fallback="previewTheme.colors.highlightText"
+              :fallback="previewTheme.colors?.highlightText"
             />
             <ContrastRatio :contrast="previewContrast.highlightText" />
             <ColorInput
               v-model="highlightLinkColorLocal"
               name="highlightLink"
               :label="$t('settings.links')"
-              :fallback="previewTheme.colors.highlightLink"
+              :fallback="previewTheme.colors?.highlightLink"
             />
             <ContrastRatio :contrast="previewContrast.highlightLink" />
           </div>
@@ -679,26 +694,26 @@
               v-model="popoverColorLocal"
               name="popover"
               :label="$t('settings.background')"
-              :fallback="previewTheme.colors.popover"
+              :fallback="previewTheme.colors?.popover"
             />
             <OpacityInput
               v-model="popoverOpacityLocal"
               name="popoverOpacity"
-              :fallback="previewTheme.opacity.popover"
+              :fallback="previewTheme.opacity?.popover"
               :disabled="popoverOpacityLocal === 'transparent'"
             />
             <ColorInput
               v-model="popoverTextColorLocal"
               name="popoverText"
               :label="$t('settings.text')"
-              :fallback="previewTheme.colors.popoverText"
+              :fallback="previewTheme.colors?.popoverText"
             />
             <ContrastRatio :contrast="previewContrast.popoverText" />
             <ColorInput
               v-model="popoverLinkColorLocal"
               name="popoverLink"
               :label="$t('settings.links')"
-              :fallback="previewTheme.colors.popoverLink"
+              :fallback="previewTheme.colors?.popoverLink"
             />
             <ContrastRatio :contrast="previewContrast.popoverLink" />
           </div>
@@ -708,20 +723,20 @@
               v-model="selectedPostColorLocal"
               name="selectedPost"
               :label="$t('settings.background')"
-              :fallback="previewTheme.colors.selectedPost"
+              :fallback="previewTheme.colors?.selectedPost"
             />
             <ColorInput
               v-model="selectedPostTextColorLocal"
               name="selectedPostText"
               :label="$t('settings.text')"
-              :fallback="previewTheme.colors.selectedPostText"
+              :fallback="previewTheme.colors?.selectedPostText"
             />
             <ContrastRatio :contrast="previewContrast.selectedPostText" />
             <ColorInput
               v-model="selectedPostLinkColorLocal"
               name="selectedPostLink"
               :label="$t('settings.links')"
-              :fallback="previewTheme.colors.selectedPostLink"
+              :fallback="previewTheme.colors?.selectedPostLink"
             />
             <ContrastRatio :contrast="previewContrast.selectedPostLink" />
           </div>
@@ -731,20 +746,20 @@
               v-model="selectedMenuColorLocal"
               name="selectedMenu"
               :label="$t('settings.background')"
-              :fallback="previewTheme.colors.selectedMenu"
+              :fallback="previewTheme.colors?.selectedMenu"
             />
             <ColorInput
               v-model="selectedMenuTextColorLocal"
               name="selectedMenuText"
               :label="$t('settings.text')"
-              :fallback="previewTheme.colors.selectedMenuText"
+              :fallback="previewTheme.colors?.selectedMenuText"
             />
             <ContrastRatio :contrast="previewContrast.selectedMenuText" />
             <ColorInput
               v-model="selectedMenuLinkColorLocal"
               name="selectedMenuLink"
               :label="$t('settings.links')"
-              :fallback="previewTheme.colors.selectedMenuLink"
+              :fallback="previewTheme.colors?.selectedMenuLink"
             />
             <ContrastRatio :contrast="previewContrast.selectedMenuLink" />
           </div>
@@ -753,57 +768,57 @@
             <ColorInput
               v-model="chatBgColorLocal"
               name="chatBgColor"
-              :fallback="previewTheme.colors.bg"
+              :fallback="previewTheme.colors?.bg"
               :label="$t('settings.background')"
             />
             <h5>{{ $t('settings.style.advanced_colors.chat.incoming') }}</h5>
             <ColorInput
               v-model="chatMessageIncomingBgColorLocal"
               name="chatMessageIncomingBgColor"
-              :fallback="previewTheme.colors.bg"
+              :fallback="previewTheme.colors?.bg"
               :label="$t('settings.background')"
             />
             <ColorInput
               v-model="chatMessageIncomingTextColorLocal"
               name="chatMessageIncomingTextColor"
-              :fallback="previewTheme.colors.text"
+              :fallback="previewTheme.colors?.text"
               :label="$t('settings.text')"
             />
             <ColorInput
               v-model="chatMessageIncomingLinkColorLocal"
               name="chatMessageIncomingLinkColor"
-              :fallback="previewTheme.colors.link"
+              :fallback="previewTheme.colors?.link"
               :label="$t('settings.links')"
             />
             <ColorInput
               v-model="chatMessageIncomingBorderColorLocal"
               name="chatMessageIncomingBorderLinkColor"
-              :fallback="previewTheme.colors.fg"
+              :fallback="previewTheme.colors?.fg"
               :label="$t('settings.style.advanced_colors.chat.border')"
             />
             <h5>{{ $t('settings.style.advanced_colors.chat.outgoing') }}</h5>
             <ColorInput
               v-model="chatMessageOutgoingBgColorLocal"
               name="chatMessageOutgoingBgColor"
-              :fallback="previewTheme.colors.bg"
+              :fallback="previewTheme.colors?.bg"
               :label="$t('settings.background')"
             />
             <ColorInput
               v-model="chatMessageOutgoingTextColorLocal"
               name="chatMessageOutgoingTextColor"
-              :fallback="previewTheme.colors.text"
+              :fallback="previewTheme.colors?.text"
               :label="$t('settings.text')"
             />
             <ColorInput
               v-model="chatMessageOutgoingLinkColorLocal"
               name="chatMessageOutgoingLinkColor"
-              :fallback="previewTheme.colors.link"
+              :fallback="previewTheme.colors?.link"
               :label="$t('settings.links')"
             />
             <ColorInput
               v-model="chatMessageOutgoingBorderColorLocal"
               name="chatMessageOutgoingBorderLinkColor"
-              :fallback="previewTheme.colors.bg"
+              :fallback="previewTheme.colors?.bg"
               :label="$t('settings.style.advanced_colors.chat.border')"
             />
           </div>
@@ -826,7 +841,7 @@
             v-model="btnRadiusLocal"
             name="btnRadius"
             :label="$t('settings.btnRadius')"
-            :fallback="previewTheme.radii.btn"
+            :fallback="previewTheme.radii?.btn"
             max="16"
             hard-min="0"
           />
@@ -834,7 +849,7 @@
             v-model="inputRadiusLocal"
             name="inputRadius"
             :label="$t('settings.inputRadius')"
-            :fallback="previewTheme.radii.input"
+            :fallback="previewTheme.radii?.input"
             max="9"
             hard-min="0"
           />
@@ -842,7 +857,7 @@
             v-model="checkboxRadiusLocal"
             name="checkboxRadius"
             :label="$t('settings.checkboxRadius')"
-            :fallback="previewTheme.radii.checkbox"
+            :fallback="previewTheme.radii?.checkbox"
             max="16"
             hard-min="0"
           />
@@ -850,7 +865,7 @@
             v-model="panelRadiusLocal"
             name="panelRadius"
             :label="$t('settings.panelRadius')"
-            :fallback="previewTheme.radii.panel"
+            :fallback="previewTheme.radii?.panel"
             max="50"
             hard-min="0"
           />
@@ -858,7 +873,7 @@
             v-model="avatarRadiusLocal"
             name="avatarRadius"
             :label="$t('settings.avatarRadius')"
-            :fallback="previewTheme.radii.avatar"
+            :fallback="previewTheme.radii?.avatar"
             max="28"
             hard-min="0"
           />
@@ -866,7 +881,7 @@
             v-model="avatarAltRadiusLocal"
             name="avatarAltRadius"
             :label="$t('settings.avatarAltRadius')"
-            :fallback="previewTheme.radii.avatarAlt"
+            :fallback="previewTheme.radii?.avatarAlt"
             max="28"
             hard-min="0"
           />
@@ -874,7 +889,7 @@
             v-model="attachmentRadiusLocal"
             name="attachmentRadius"
             :label="$t('settings.attachmentRadius')"
-            :fallback="previewTheme.radii.attachment"
+            :fallback="previewTheme.radii?.attachment"
             max="50"
             hard-min="0"
           />
@@ -882,7 +897,7 @@
             v-model="tooltipRadiusLocal"
             name="tooltipRadius"
             :label="$t('settings.tooltipRadius')"
-            :fallback="previewTheme.radii.tooltip"
+            :fallback="previewTheme.radii?.tooltip"
             max="50"
             hard-min="0"
           />
@@ -890,7 +905,7 @@
             v-model="chatMessageRadiusLocal"
             name="chatMessageRadius"
             :label="$t('settings.chatMessageRadius')"
-            :fallback="previewTheme.radii.chatMessage || 2"
+            :fallback="previewTheme.radii?.chatMessage || 2"
             max="50"
             hard-min="0"
           />
@@ -996,26 +1011,26 @@
             v-model="fontsLocal.interface"
             name="ui"
             :label="$t('settings.style.fonts.components.interface')"
-            :fallback="previewTheme.fonts.interface"
+            :fallback="previewTheme.fonts?.interface"
             no-inherit="1"
           />
           <FontControl
             v-model="fontsLocal.input"
             name="input"
             :label="$t('settings.style.fonts.components.input')"
-            :fallback="previewTheme.fonts.input"
+            :fallback="previewTheme.fonts?.input"
           />
           <FontControl
             v-model="fontsLocal.post"
             name="post"
             :label="$t('settings.style.fonts.components.post')"
-            :fallback="previewTheme.fonts.post"
+            :fallback="previewTheme.fonts?.post"
           />
           <FontControl
             v-model="fontsLocal.postCode"
             name="postCode"
             :label="$t('settings.style.fonts.components.postCode')"
-            :fallback="previewTheme.fonts.postCode"
+            :fallback="previewTheme.fonts?.postCode"
           />
         </div>
       </tab-switcher>