code · pull · Jun 15, 2026 · Jun 15, 2026 · Jun 15, 2026 · Jun 15, 2026
diff --git a/.vscode/settings.json b/.vscode/settings.json
@@ -6,14 +6,21 @@
     "editor.defaultFormatter": "dbaeumer.vscode-eslint"
   },
   "cSpell.words": [
+    "commonmark",
     "contenteditable",
+    "execall",
     "frontmatter",
     "Häusler",
     "hfelix",
     "Jocs",
+    "katex",
+    "laynezh",
     "marktext",
     "muya",
+    "Setext",
     "snabbdom",
-    "Tkaixiang"
+    "snapsvg",
+    "Tkaixiang",
+    "webfontloader"
   ]
 }
diff --git a/packages/desktop/src/common/i18n.ts b/packages/desktop/src/common/i18n.ts
@@ -3,7 +3,7 @@ import path from 'path'
 
 export type Translations = Record<string, unknown>
 
-const SUPPORTED_LANGUAGES = ['en', 'zh-CN', 'zh-TW', 'es', 'fr', 'de', 'ja', 'ko', 'pt'] as const
+const SUPPORTED_LANGUAGES = ['en', 'zh-CN', 'zh-TW', 'es', 'fr', 'de', 'ja', 'ko', 'pt', 'tr'] as const
 
 export type SupportedLanguage = (typeof SUPPORTED_LANGUAGES)[number]
 

diff --git a/packages/desktop/src/main/preferences/schema.json b/packages/desktop/src/main/preferences/schema.json
@@ -282,6 +282,12 @@
     "enum": ["hand", "simple"],
     "default": "hand"
   },
+  "plantumlServer": {
+    "description": "Markdown--PlantUML server URL for rendering diagrams",
+    "type": "string",
+    "pattern": "^(https?://|$)",
+    "default": "https://www.plantuml.com/plantuml"
+  },
   "theme": {
     "description": "Theme--Select the theme used in MarkText",
     "type": "string",

diff --git a/packages/desktop/src/renderer/src/components/editorWithTabs/editor.vue b/packages/desktop/src/renderer/src/components/editorWithTabs/editor.vue
@@ -113,6 +113,7 @@ import {
   ja,
   ko,
   pt,
+  tr,
   zhCN,
   zhTW,
   type ILocale
@@ -157,6 +158,7 @@ const MUYA_LOCALES: Record<string, ILocale> = {
   ja,
   ko,
   pt,
+  tr,
   'zh-CN': zhCN,
   'zh-TW': zhTW
 }
@@ -584,6 +586,12 @@ watch(sequenceTheme, (value, oldValue) => {
   }
 })
 
+watch(() => preferencesStore.plantumlServer, (value, oldValue) => {
+  if (value !== oldValue && editor.value) {
+    editor.value.setOptions({ plantumlServer: value }, true)
+  }
+})
+
 watch(listIndentation, (value, oldValue) => {
   if (value !== oldValue && editor.value) {
     editor.value.setListIndentation(value)
@@ -1450,6 +1458,13 @@ const handleFileChange = (payload: unknown) => {
       if (savedEngineHistory) {
         editor.value.setHistory(savedEngineHistory)
       }
+      // First activation of a tab the save-tracking allocator has never seen:
+      // seed its clean baseline from the engine's serialization now, before
+      // any edit. For a tab that already has a tracker this is a no-op —
+      // switching back must keep the existing content -> id map.
+      if (id) {
+        getSyntheticHistory(id, editor.value.getMarkdown())
+      }
     }
   } else if (newCursor) {
     editor.value.setCursor(newCursor)
@@ -1578,6 +1593,7 @@ onMounted(() => {
     hideLinkPopup: hideLinkPopup.value,
     autoCheck: autoCheck.value,
     sequenceTheme: sequenceTheme.value,
+    plantumlServer: preferencesStore.plantumlServer,
     spellcheckEnabled: spellcheckerEnabled.value,
     // Resolve the OS clipboard to a local file path on paste (image-from-file).
     clipboardFilePath: guessClipboardFilePath,
@@ -1613,6 +1629,15 @@ onMounted(() => {
   muya.init()
   editor.value = muya
 
+  // Seed the save-tracking baseline for the mount-loaded document (from the
+  // engine's OWN serialization, same reason as setMarkdownToEditor). Without
+  // this the allocator is created lazily on the first `json-change` — i.e.
+  // after the first edit — so the pristine content never maps to id 0 and
+  // undoing back to the on-disk content can never read as clean again (PG15).
+  if (currentFile.value?.id) {
+    getSyntheticHistory(currentFile.value.id, muya.getMarkdown())
+  }
+
   const container = getScrollContainer()!
 
   // Listen for language changes and update the engine locale.

diff --git a/packages/desktop/src/renderer/src/components/exportSettings/index.vue b/packages/desktop/src/renderer/src/components/exportSettings/index.vue
@@ -163,7 +163,7 @@
           </div>
           <cur-select
             :description="t('exportSettings.theme.theme')"
-            more="https://github.com/marktext/marktext/blob/develop/docs/EXPORT_THEMES.md"
+            more="https://marktext.me/docs/export-themes"
             :value="theme"
             :options="themeList"
             :on-change="(value: unknown) => onSelectChange('theme', value)"

diff --git a/packages/desktop/src/renderer/src/prefComponents/general/config.ts b/packages/desktop/src/renderer/src/prefComponents/general/config.ts
@@ -131,5 +131,9 @@ export const getLanguageOptions = (): PrefSelectOption<string>[] => [
   {
     label: t('preferences.general.misc.language.portuguese'),
     value: 'pt'
+  },
+  {
+    label: t('preferences.general.misc.language.turkish'),
+    value: 'tr'
   }
 ]
diff --git a/packages/desktop/src/renderer/src/prefComponents/image/components/folderSetting/index.vue b/packages/desktop/src/renderer/src/prefComponents/image/components/folderSetting/index.vue
@@ -28,7 +28,7 @@
       <template #head>
         <bool
           :description="t('preferences.image.folderSetting.preferRelative')"
-          more="https://github.com/marktext/marktext/blob/develop/docs/end-user/IMAGES.md"
+          more="https://marktext.me/docs/images"
           :bool="imagePreferRelativeDirectory"
           :on-change="(value) => onSelectChange('imagePreferRelativeDirectory', value)"
         />

diff --git a/packages/desktop/src/renderer/src/prefComponents/keybindings/index.vue b/packages/desktop/src/renderer/src/prefComponents/keybindings/index.vue
@@ -8,7 +8,7 @@
           class="link"
           :title="t('preferences.keybindings.online')"
           :aria-label="t('preferences.keybindings.online')"
-          @click="openKeybindingWiki"
+          @click="openKeybindingDocs"
         ><LinkIcon
           :size="14"
           class="link-icon"
@@ -167,9 +167,9 @@ onUnmounted(() => {
   keybindingConfigurator.value = null
 })
 
-const openKeybindingWiki = (): void => {
+const openKeybindingDocs = (): void => {
   window.electron.shell.openExternal(
-    'https://github.com/marktext/marktext/blob/develop/docs/end-user/KEYBINDINGS.md'
+    'https://marktext.me/docs/key-bindings'
   )
 }
 

diff --git a/packages/desktop/src/renderer/src/prefComponents/markdown/index.vue b/packages/desktop/src/renderer/src/prefComponents/markdown/index.vue
@@ -100,6 +100,12 @@
           :on-change="(value) => onSelectChange('sequenceTheme', value)"
           more="https://bramp.github.io/js-sequence-diagrams/"
         />
+        <text-box
+          :description="t('preferences.markdown.diagrams.plantumlServer.title')"
+          :input="plantumlServer"
+          :on-change="(value) => onSelectChange('plantumlServer', value)"
+          :default-value="'https://www.plantuml.com/plantuml'"
+        />
       </template>
     </compound>
 
@@ -129,6 +135,7 @@ import { usePreferencesStore } from '@/store/preferences'
 import type { PreferencesState } from '@/store/preferences'
 import Bool from '../common/bool/index.vue'
 import CurSelect from '../common/select/index.vue'
+import TextBox from '../common/textBox/index.vue'
 import {
   bulletListMarkerOptions,
   orderListDelimiterOptions,
@@ -154,7 +161,8 @@ const {
   footnote,
   isHtmlEnabled,
   isGitlabCompatibilityEnabled,
-  sequenceTheme
+  sequenceTheme,
+  plantumlServer
 } = storeToRefs(preferenceStore)
 
 const onSelectChange = (type: keyof PreferencesState, value: unknown): void => {

diff --git a/packages/desktop/src/renderer/src/store/preferences.ts b/packages/desktop/src/renderer/src/store/preferences.ts
@@ -80,6 +80,7 @@ export interface PreferencesState {
   isHtmlEnabled: boolean
   isGitlabCompatibilityEnabled: boolean
   sequenceTheme: SequenceTheme | string
+  plantumlServer: string
 
   // ----- Theme -----
   theme: string
@@ -195,6 +196,7 @@ export const usePreferencesStore = defineStore('preferences', {
     isHtmlEnabled: true,
     isGitlabCompatibilityEnabled: false,
     sequenceTheme: 'hand',
+    plantumlServer: 'https://www.plantuml.com/plantuml',
 
     theme: 'light',
     followSystemTheme: true,

diff --git a/packages/desktop/src/types/muya-core.d.ts b/packages/desktop/src/types/muya-core.d.ts
@@ -31,6 +31,7 @@ declare module '@muyajs/core' {
   export const ja: ILocale
   export const ko: ILocale
   export const pt: ILocale
+  export const tr: ILocale
   export const zhCN: ILocale
   export const zhTW: ILocale
 

diff --git a/packages/desktop/static/locales/de.json b/packages/desktop/static/locales/de.json
@@ -454,6 +454,7 @@
         "isHtmlEnabled": "HTML-Rendering aktivieren",
         "isGitlabCompatibilityEnabled": "GitLab-Kompatibilitätsmodus aktivieren",
         "sequenceTheme": "Sequenzdiagramm-Theme",
+        "plantumlServer": "PlantUML-Server-URL",
         "theme": "Das in MarkText verwendete Theme auswählen",
         "followSystemTheme": "Systemdesign folgen",
         "lightModeTheme": "Design, das verwendet werden soll, wenn sich das System im hellen Modus befindet",
@@ -551,7 +552,8 @@
           "german": "Deutsch",
           "japanese": "日本語",
           "korean": "한국어",
-          "portuguese": "Português"
+          "portuguese": "Português",
+          "turkish": "Türkçe"
         }
       }
     },
@@ -770,6 +772,9 @@
           "title": "Sequenz-Design",
           "handDrawn": "Handgezeichnet",
           "simple": "Einfach"
+        },
+        "plantumlServer": {
+          "title": "PlantUML-Server-URL"
         }
       },
       "math": {

diff --git a/packages/desktop/static/locales/en.json b/packages/desktop/static/locales/en.json
@@ -453,6 +453,7 @@
         "isHtmlEnabled": "Enable HTML rendering",
         "isGitlabCompatibilityEnabled": "Enable GitLab compatibility mode",
         "sequenceTheme": "Sequence diagram theme",
+        "plantumlServer": "PlantUML server URL",
         "theme": "Select the theme used in MarkText",
         "followSystemTheme": "Follow System Theme",
         "lightModeTheme": "Theme to use when system is in light mode",
@@ -550,7 +551,8 @@
           "german": "Deutsch",
           "japanese": "日本語",
           "korean": "한국어",
-          "portuguese": "Português"
+          "portuguese": "Português",
+          "turkish": "Türkçe"
         }
       }
     },
@@ -769,6 +771,9 @@
           "title": "Sequence Theme",
           "handDrawn": "Hand Drawn",
           "simple": "Simple"
+        },
+        "plantumlServer": {
+          "title": "PlantUML Server URL"
         }
       },
       "math": {

diff --git a/packages/desktop/static/locales/es.json b/packages/desktop/static/locales/es.json
@@ -454,6 +454,7 @@
         "isHtmlEnabled": "Habilitar renderizado HTML",
         "isGitlabCompatibilityEnabled": "Habilitar modo de compatibilidad GitLab",
         "sequenceTheme": "Tema del diagrama de secuencia",
+        "plantumlServer": "URL del servidor PlantUML",
         "theme": "Seleccionar el tema usado en MarkText",
         "followSystemTheme": "Seguir tema del sistema",
         "lightModeTheme": "Tema a usar cuando el sistema está en modo claro",
@@ -551,7 +552,8 @@
           "german": "Deutsch",
           "japanese": "日本語",
           "korean": "한국어",
-          "portuguese": "Português"
+          "portuguese": "Português",
+          "turkish": "Türkçe"
         }
       }
     },
@@ -770,6 +772,9 @@
           "title": "Tema de Secuencia",
           "handDrawn": "Dibujado a Mano",
           "simple": "Simple"
+        },
+        "plantumlServer": {
+          "title": "URL del servidor PlantUML"
         }
       },
       "math": {

diff --git a/packages/desktop/static/locales/fr.json b/packages/desktop/static/locales/fr.json
@@ -455,6 +455,7 @@
         "isHtmlEnabled": "Activer le rendu HTML",
         "isGitlabCompatibilityEnabled": "Activer le mode de compatibilité GitLab",
         "sequenceTheme": "Thème du diagramme de séquence",
+        "plantumlServer": "URL du serveur PlantUML",
         "theme": "Sélectionner le thème utilisé dans MarkText",
         "followSystemTheme": "Suivre le thème du système",
         "lightModeTheme": "Thème à utiliser lorsque le système est en mode clair",
@@ -552,7 +553,8 @@
           "german": "Deutsch",
           "japanese": "日本語",
           "korean": "한국어",
-          "portuguese": "Português"
+          "portuguese": "Português",
+          "turkish": "Türkçe"
         }
       }
     },
@@ -772,6 +774,9 @@
           "title": "Thème de séquence",
           "handDrawn": "Dessiné à la main",
           "simple": "Simple"
+        },
+        "plantumlServer": {
+          "title": "URL du serveur PlantUML"
         }
       },
       "math": {

diff --git a/packages/desktop/static/locales/ja.json b/packages/desktop/static/locales/ja.json
@@ -455,6 +455,7 @@
         "isHtmlEnabled": "HTMLレンダリングを有効にする",
         "isGitlabCompatibilityEnabled": "GitLab互換モードを有効にする",
         "sequenceTheme": "シーケンス図のテーマ",
+        "plantumlServer": "PlantUMLサーバーのURL",
         "theme": "MarkTextで使用するテーマを選択",
         "followSystemTheme": "システムのテーマに従う",
         "lightModeTheme": "システムがライトモードの時に使用するテーマ",
@@ -552,7 +553,8 @@
           "german": "Deutsch",
           "japanese": "日本語",
           "korean": "한국어",
-          "portuguese": "Português"
+          "portuguese": "Português",
+          "turkish": "Türkçe"
         }
       }
     },
@@ -772,6 +774,9 @@
           "title": "シーケンステーマ",
           "handDrawn": "手描き",
           "simple": "シンプル"
+        },
+        "plantumlServer": {
+          "title": "PlantUMLサーバーのURL"
         }
       },
       "math": {

diff --git a/packages/desktop/static/locales/ko.json b/packages/desktop/static/locales/ko.json
@@ -455,6 +455,7 @@
         "isHtmlEnabled": "HTML 렌더링 활성화",
         "isGitlabCompatibilityEnabled": "GitLab 호환 모드 활성화",
         "sequenceTheme": "시퀀스 다이어그램 테마",
+        "plantumlServer": "PlantUML 서버 URL",
         "theme": "MarkText에서 사용할 테마 선택",
         "followSystemTheme": "시스템 테마 따르기",
         "lightModeTheme": "시스템이 라이트 모드일 때 사용할 테마",
@@ -552,7 +553,8 @@
           "german": "Deutsch",
           "japanese": "日本語",
           "korean": "한국어",
-          "portuguese": "Português"
+          "portuguese": "Português",
+          "turkish": "Türkçe"
         }
       }
     },
@@ -772,6 +774,9 @@
           "title": "시퀀스 테마",
           "handDrawn": "손으로 그린",
           "simple": "간단"
+        },
+        "plantumlServer": {
+          "title": "PlantUML 서버 URL"
         }
       },
       "math": {