Unify row color styling across all web table cells

Previously, when a meeting row had a color assigned (e.g. red), the
attendees and time cells only received the colored border but not the
background fill. The meeting cell used `tintedCellStyle(col, true)` which
always applies rowBg, while attendees and time used
`tintedCellStyle(col, isMerged)` — meaning they only got the background
when the row was merged.

Changed both attendees and time cells to use `tintedCellStyle(col, true)`
so all four cells (number, meeting, attendees, time) display the same
background fill and border color when a row color is set.

This mirrors the PDF fix from Task #385 which addressed the same
inconsistency in the PDF renderer.

File changed: artifacts/tx-os/src/pages/executive-meetings.tsx (lines 3804, 3825)

artifacts/tx-os/src/pages/executive-meetings.tsx

@@ -3801,7 +3801,7 @@ function MeetingRow({
           <td
             key="attendees"
             className="border border-gray-300 px-3 py-3 align-middle relative group"
-            style={tintedCellStyle(col, isMerged)}
+            style={tintedCellStyle(col, true)}
           >
             <AttendeesCell
               meeting={meeting}
@@ -3822,7 +3822,7 @@ function MeetingRow({
           <td
             key="time"
             className="border border-gray-300 px-3 py-3 align-middle text-center relative group"
-            style={tintedCellStyle(col, isMerged)}
+            style={tintedCellStyle(col, true)}
           >
             <TimeRangeCell
               meeting={meeting}