The same page on every screen

The text is laid out on a page of one fixed size and the sheet scaled to
the screen, so a phone breaks it exactly where a desktop does — twenty-one
lines to the page on both. The type size is computed from the page and the
line count rather than chosen.

A PDF's full screen is the browser window, not the screen, and its button
sits beside the zoom. "Recent Notes" is stamped by every write, not only by
a rename. And a PDF that will not open says which of the four reasons it is.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

frontend/src/editor/editor.css

@@ -66,7 +66,7 @@
   /* Set per account — see UserPreferences. The stack is the fallback chain, so
      an unset preference still reads as the serif it always was. */
   font-family: var(--ne-font, "Newsreader", Georgia, serif);
-  font-size: 15px;
+  font-size: var(--ne-size, 15px);
   line-height: var(--ne-line);
   padding: 20px 24px;
   min-height: 100%;