Support Importing Excel Data into Canvas #1244
Description
Is your feature request related to a problem? Please describe.
Currently, the canvas does not support direct Excel imports.
Describe the solution you'd like
Allow users to directly upload .xls / .xlsx files, automatically parsing them into table nodes or visualization nodes.
Describe alternatives you've considered
Copy-pasting data into nodes manually, which is inefficient and prone to formatting issues.
Additional context
This feature is critical for users performing data analysis, reporting, and business visualization tasks.