fix(chart): the secondary page column may shrink, so the chart fits a phone (M1, BUG-1083)

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N4f2nya58RoRu4yEmJgRGE

frontend/src/app/globals.css

@@ -2209,6 +2209,12 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
 }
 .secondary-page {
   display: grid;
+  /* One column that may shrink below its content (BUG-1083). The implicit
+     `auto` track took the page body's min-content — the nowrap chart-type strip
+     and the 34rem planet table — so on a phone the chart page grew past the
+     viewport and the North Indian chart was cut off on the right. Wide content
+     scrolls inside its own box instead. */
+  grid-template-columns: minmax(0, 1fr);
   align-content: start;
   min-height: 0;
 }