fix: use correct styles for table header cells (th) vs data cells (td)

[Astatine-213-Tian]

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Previously, both ⁠<th> (header) and ⁠<td> (data) table cells were rendered using ⁠finalStyles.td, which meant header cell styles were ignored. This PR updates the table cell renderer to check if the cell is a header or data cell, and applies the correct styles:

• Header cells (⁠<th>) now use ⁠finalStyles.th

• Data cells (⁠<td>) use ⁠finalStyles.td

This ensures that custom header styles are properly applied and not overridden by data cell styles.