rusackas opened a new pull request, #38176:
URL: https://github.com/apache/superset/pull/38176

   ## Summary
   
   The Excel export was including an unwanted index column (row numbers 0, 1, 
2...) because `df.to_excel()` defaults to `index=True`. CSV export already 
handled this correctly by passing `index=include_index`.
   
   This fix applies the same logic to Excel exports: only include the index 
column if the DataFrame has a custom index (not a RangeIndex).
   
   **Before:**
   
![Image](https://github.com/user-attachments/assets/063a8240-2fe2-4939-9725-6f022dd4202b)
   
   **After:** The first column with row numbers will no longer appear.
   
   ## Test plan
   
   - [ ] Export a chart to Excel and verify no unwanted index column appears
   - [ ] Verify CSV export still works correctly
   - [ ] Verify DataFrames with custom indices still export the index
   
   Closes #32113
   Related: #22981, #29717
   
   🤖 Generated with [Claude Code](https://claude.com/claude-code)


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