roi: more tooltips

ts/roi.ts

@@ -28,7 +28,7 @@ async function render() {
 			<td style="color: ${color(p.cost_per_day, 100_000, 25_000)}">${formatWhole(p.cost_per_day)}</td>
 			<td style="color: ${color(p.logistics_per_area, 2, 0.2)}">${formatDecimal(p.logistics_per_area)}</td>
 			<td>
-				${formatWhole(p.output_per_day)}<br>
+				${formatDecimal(p.output_per_day)}<br>
 				<span style="color: ${color(volumeRatio, 0.05, 0.002)}">${formatWhole(p.average_traded_7d)}</span>
 			</td>
 		`;

www/index.html

@@ -18,10 +18,10 @@
 					<th>expertise</th>
 					<th>daily<br>profit/area</th>
 					<th>break<br>even</th>
-					<th>capex</th>
-					<th>daily<br>opex</th>
-					<th>logistics</th>
-					<th>daily output<br>traded</th>
+					<th title="construction cost of 1 building">capex</th>
+					<th title="input and worker costs of 1 building (deterioration/repair not included)">daily<br>opex</th>
+					<th title="max of input and output t and m³ per area">logistics</th>
+					<th title="units output by 1 building over average daily traded">daily output<br>traded</th>
 				</tr>
 			</thead>
 			<tbody></tbody>