fix: restore share and note scrolling on ios pwa

bare routes lacked a scrollport under overflow:hidden html/body.
wide rich-text tables used overflow-x:auto alone, which computes
overflow-y:auto and traps vertical touch on iphone. force ink palette
on /s/* for a consistent public share look.

src/components/rich-text/rich-text.css

@@ -64,6 +64,9 @@
   margin: 0.8em 0;
   max-width: 100%;
   overflow-x: auto;
+  overflow-y: hidden;
+  -webkit-overflow-scrolling: touch;
+  overscroll-behavior-x: contain;
   padding: 0.75rem 0.9rem;
 }
 
@@ -91,7 +94,12 @@
   display: block;
   margin: 0.8em 0;
   max-width: 100%;
+  /* overflow-x alone computes overflow-y to auto, which traps vertical
+     touch scrolling on iOS when a wide table fills the viewport. */
   overflow-x: auto;
+  overflow-y: hidden;
+  -webkit-overflow-scrolling: touch;
+  overscroll-behavior-x: contain;
   width: max-content;
 }