Fix home icon centering, eye icons on touch, tune landscape layout

- Center donut at 50% for compact landscape phones (was ~47%, misaligned
  with CSS center-label)
- Show eye buttons on touch devices via @media (pointer: coarse)
- Reduce right padding to 34px, narrow chart-wrapper to 49%

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app.js

@@ -2815,8 +2815,8 @@ function adjustChartSize() {
 
     // Calculate center position
     let centerPosition;
-    if (screenWidth <= 850) {
-        // Stacked layout: center the chart since details box is below
+    if (screenWidth <= 850 || isCompact) {
+        // Stacked layout or compact landscape: center the chart
         centerPosition = 50;
     } else if (screenWidth >= 1000) {
         centerPosition = 50;

styles.css

@@ -654,7 +654,7 @@ body {
         padding-top: calc(4px + env(safe-area-inset-top));
         padding-bottom: 4px;
         padding-left: 24px;
-        padding-right: 42px;
+        padding-right: 34px;
     }
 
     .header {
@@ -766,11 +766,11 @@ body {
 
     .container {
         padding-left: 24px;
-        padding-right: 42px;
+        padding-right: 34px;
     }
 
     .chart-wrapper {
-        width: 52%;
+        width: 49%;
         height: calc(100dvh - 50px);
     }
 
@@ -778,7 +778,7 @@ body {
         width: 40vw;
         padding: 10px;
         max-height: calc(100dvh - 50px);
-        right: 42px;
+        right: 34px;
     }
 
     .details-header {
@@ -846,6 +846,13 @@ body {
     }
 }
 
+@media (pointer: coarse) {
+    .eye-btn,
+    .header-eye-btn {
+        opacity: 0.5;
+    }
+}
+
 /* Floating eye button on chart (shown when hovering over sunburst sector) */
 .chart-eye-btn {
     position: absolute;