Edit panel pricing via CSV download and re-upload

Change panel pricing in bulk by downloading the template as a CSV, updating the prices, and re-uploading it.

1. To change panel pricing, open the panel pricing template and edit values there.

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2. You can download the template as a CSV (Excel) file, change the pricing, and re-upload it.

3. On subsequent changes, download the CSV, update the prices, and re-upload instead of editing each product individually.