diff --git a/preload.js b/preload.js
index 646c405..e91f86c 100644
--- a/preload.js
+++ b/preload.js
@@ -1,5 +1,5 @@
 // preload.js — expose IPC to renderer
-const { contextBridge, ipcRenderer } = require('electron');
+const { contextBridge, ipcRenderer, webUtils } = require('electron');
 
 contextBridge.exposeInMainWorld('electronAPI', {
   // Lokale Datei-Operationen
@@ -20,7 +20,13 @@ contextBridge.exposeInMainWorld('electronAPI', {
 
   // Gitea Datei-Operationen
   listGiteaRepos: (data) => ipcRenderer.invoke('list-gitea-repos', data),
+  getGiteaCurrentUser: () => ipcRenderer.invoke('get-gitea-current-user'),
   getGiteaUserHeatmap: (data) => ipcRenderer.invoke('get-gitea-user-heatmap', data),
+
+  // GitHub Datei-Operationen
+  listGithubRepos: (data) => ipcRenderer.invoke('list-github-repos', data),
+  getGithubCurrentUser: () => ipcRenderer.invoke('get-github-current-user'),
+  getGithubUserHeatmap: (data) => ipcRenderer.invoke('get-github-user-heatmap', data),
   getGiteaRepoContents: (data) => ipcRenderer.invoke('get-gitea-repo-contents', data),
   getGiteaFileContent: (data) => ipcRenderer.invoke('get-gitea-file-content', data),
   readGiteaFile: (data) => ipcRenderer.invoke('read-gitea-file', data),
@@ -33,13 +39,22 @@ contextBridge.exposeInMainWorld('electronAPI', {
   // Repository & Git Management
   saveCredentials: (data) => ipcRenderer.invoke('save-credentials', data),
   loadCredentials: () => ipcRenderer.invoke('load-credentials'),
+  getCredentialsStatus: () => ipcRenderer.invoke('get-credentials-status'),
   testGiteaConnection: (data) => ipcRenderer.invoke('test-gitea-connection', data),
+  testGithubConnection: (data) => ipcRenderer.invoke('test-github-connection', data),
+  updateGiteaAvatar: (data) => ipcRenderer.invoke('update-gitea-avatar', data),
+  updateGiteaRepoAvatar: (data) => ipcRenderer.invoke('update-gitea-repo-avatar', data),
+  updateGiteaRepoVisibility: (data) => ipcRenderer.invoke('update-gitea-repo-visibility', data),
+  updateGiteaRepoTopics: (data) => ipcRenderer.invoke('update-gitea-repo-topics', data),
+  getGiteaTopicsCatalog: () => ipcRenderer.invoke('get-gitea-topics-catalog'),
+  migrateRepoToGitea: (data) => ipcRenderer.invoke('migrate-repo-to-gitea', data),
   createRepo: (data) => ipcRenderer.invoke('create-repo', data),
   pushProject: (data) => ipcRenderer.invoke('push-project', data),
   getBranches: (data) => ipcRenderer.invoke('getBranches', data),
   getCommitLogs: (data) => ipcRenderer.invoke('getCommitLogs', data),
   uploadAndPush: (data) => ipcRenderer.invoke('upload-and-push', data),
   deleteGiteaRepo: (data) => ipcRenderer.invoke('delete-gitea-repo', data),
+  syncRepoToGitHub: (data) => ipcRenderer.invoke('sync-repo-to-github', data),
   runBatchRepoAction: (data) => ipcRenderer.invoke('run-batch-repo-action', data),
   validateRepoName: (data) => ipcRenderer.invoke('validate-repo-name', data),
   checkCloneTargetCollisions: (data) => ipcRenderer.invoke('check-clone-target-collisions', data),
@@ -52,6 +67,14 @@ contextBridge.exposeInMainWorld('electronAPI', {
   // Drag & Drop
   prepareDownloadDrag: (data) => ipcRenderer.invoke('prepare-download-drag', data),
   startNativeDrag: (filePath) => ipcRenderer.send('ondragstart', filePath),
+  getPathType: (filePath) => ipcRenderer.invoke('get-path-type', filePath),
+  getPathForFile: (file) => {
+    try {
+      return webUtils.getPathForFile(file) || '';
+    } catch (_) {
+      return '';
+    }
+  },
 
   // Release Management
   listReleases: (data) => ipcRenderer.invoke('list-releases', data),
@@ -84,7 +107,7 @@ contextBridge.exposeInMainWorld('electronAPI', {
   saveRecent: (data) => ipcRenderer.invoke('save-recent', data),
 
   // === UPDATER APIs ===
-  checkForUpdates: () => ipcRenderer.invoke('check-for-updates'),
+  checkForUpdates: (options) => ipcRenderer.invoke('check-for-updates', options || {}),
   getAppVersion: () => ipcRenderer.invoke('get-app-version'),
   
   // Triggert den tatsächlichen Download des Assets
@@ -98,6 +121,12 @@ contextBridge.exposeInMainWorld('electronAPI', {
     return () => ipcRenderer.removeListener('update-available', listener);
   },
 
+  onUpdateNotAvailable: (cb) => {
+    const listener = (event, info) => cb(info);
+    ipcRenderer.on('update-not-available', listener);
+    return () => ipcRenderer.removeListener('update-not-available', listener);
+  },
+
   onUpdateProgress: (cb) => {
     const listener = (event, percent) => cb(percent);
     ipcRenderer.on('update-progress', listener);
@@ -110,12 +139,6 @@ contextBridge.exposeInMainWorld('electronAPI', {
     return () => ipcRenderer.removeListener('push-progress', listener);
   },
 
-  onPrePushBackupStatus: (cb) => {
-    const listener = (event, payload) => { try { cb(payload); } catch (_) {} };
-    ipcRenderer.on('pre-push-backup-status', listener);
-    return () => ipcRenderer.removeListener('pre-push-backup-status', listener);
-  },
-
   onFolderUploadProgress: (cb) => {
     const listener = (event, payload) => { try { cb(payload); } catch (_) {} };
     ipcRenderer.on('folder-upload-progress', listener);
@@ -140,22 +163,6 @@ contextBridge.exposeInMainWorld('electronAPI', {
     return () => ipcRenderer.removeListener('batch-action-progress', listener);
   },
 
-  // Backup Management
-  exportGiteaProjectsToLocal: (data) => ipcRenderer.invoke('export-gitea-projects-to-local', data),
-  setupBackupProvider: (data) => ipcRenderer.invoke('setup-backup-provider', data),
-  testBackupProvider: (data) => ipcRenderer.invoke('test-backup-provider', data),
-  getBackupAuthStatus: (data) => ipcRenderer.invoke('get-backup-auth-status', data),
-  createCloudBackup: (data) => ipcRenderer.invoke('create-cloud-backup', data),
-  listCloudBackups: (data) => ipcRenderer.invoke('list-cloud-backups', data),
-  restoreCloudBackup: (data) => ipcRenderer.invoke('restore-cloud-backup', data),
-  deleteCloudBackup: (data) => ipcRenderer.invoke('delete-cloud-backup', data),
-
-  onBackupCreated: (cb) => {
-    const listener = (event, payload) => { try { cb(payload); } catch (_) {} };
-    ipcRenderer.on('backup-created', listener);
-    return () => ipcRenderer.removeListener('backup-created', listener);
-  },
-
   // Window Controls
   windowMinimize: () => ipcRenderer.send('window-minimize'),
   windowMaximize: () => ipcRenderer.send('window-maximize'),
@@ -167,5 +174,6 @@ contextBridge.exposeInMainWorld('electronAPI', {
 
   // Utility
   copyToClipboard: (text) => ipcRenderer.invoke('copy-to-clipboard', text),
-  openExternalUrl: (url) => ipcRenderer.invoke('open-external-url', url)
+  openExternalUrl: (url) => ipcRenderer.invoke('open-external-url', url),
+  debugToMain: (level, message, payload) => ipcRenderer.send('renderer-debug-log', { level, message, payload })
 });
\ No newline at end of file