Fix duplicated lists.

Thanks to xet7 !

Fixes #5952

client/lib/fixDuplicateLists.js

@@ -0,0 +1,93 @@
+import { Meteor } from 'meteor/meteor';
+
+/**
+ * Client-side interface for fixing duplicate lists
+ */
+export const fixDuplicateLists = {
+  
+  /**
+   * Get a report of all boards with duplicate lists/swimlanes
+   */
+  async getReport() {
+    try {
+      const result = await Meteor.callAsync('fixDuplicateLists.getReport');
+      return result;
+    } catch (error) {
+      console.error('Error getting duplicate lists report:', error);
+      throw error;
+    }
+  },
+
+  /**
+   * Fix duplicate lists for a specific board
+   */
+  async fixBoard(boardId) {
+    try {
+      const result = await Meteor.callAsync('fixDuplicateLists.fixBoard', boardId);
+      console.log(`Fixed duplicate lists for board ${boardId}:`, result);
+      return result;
+    } catch (error) {
+      console.error(`Error fixing board ${boardId}:`, error);
+      throw error;
+    }
+  },
+
+  /**
+   * Fix duplicate lists for all boards
+   */
+  async fixAllBoards() {
+    try {
+      console.log('Starting fix for all boards...');
+      const result = await Meteor.callAsync('fixDuplicateLists.fixAllBoards');
+      console.log('Fix completed:', result);
+      return result;
+    } catch (error) {
+      console.error('Error fixing all boards:', error);
+      throw error;
+    }
+  },
+
+  /**
+   * Interactive fix with user confirmation
+   */
+  async interactiveFix() {
+    try {
+      // Get report first
+      console.log('Getting duplicate lists report...');
+      const report = await this.getReport();
+      
+      if (report.boardsWithDuplicates === 0) {
+        console.log('No duplicate lists found!');
+        return { message: 'No duplicate lists found!' };
+      }
+
+      console.log(`Found ${report.boardsWithDuplicates} boards with duplicate lists:`);
+      report.report.forEach(board => {
+        console.log(`- Board "${board.boardTitle}" (${board.boardId}): ${board.duplicateSwimlanes} duplicate swimlanes, ${board.duplicateLists} duplicate lists`);
+      });
+
+      // Ask for confirmation
+      const confirmed = confirm(
+        `Found ${report.boardsWithDuplicates} boards with duplicate lists. ` +
+        `This will fix ${report.report.reduce((sum, board) => sum + board.duplicateSwimlanes + board.duplicateLists, 0)} duplicates. ` +
+        'Continue?'
+      );
+
+      if (!confirmed) {
+        return { message: 'Fix cancelled by user' };
+      }
+
+      // Perform the fix
+      const result = await this.fixAllBoards();
+      return result;
+    } catch (error) {
+      console.error('Error in interactive fix:', error);
+      throw error;
+    }
+  }
+};
+
+// Make it available globally for console access
+if (typeof window !== 'undefined') {
+  window.fixDuplicateLists = fixDuplicateLists;
+}