client: rework max content width handling

apps/client/src/stylesheets/style.css

@@ -1809,12 +1809,15 @@ body:not(.mobile) #launcher-pane.horizontal .dropdown-submenu > .dropdown-menu {
 }
 
 .note-split {
+    /* Limits the maximum width of the note */
+    --max-content-width: var(--preferred-max-content-width);
+
     margin-inline-start: auto;
     margin-inline-end: auto;
 }
 
 .note-split.full-content-width {
-    max-width: 999999px;
+    --max-content-width: unset;
 }
 
 button.close:hover {

apps/client/src/widgets/collections/NoteList.css

@@ -1,5 +1,6 @@
 .note-list-widget {
     min-height: 0;
+    max-width: var(--max-content-width); /* Inherited from .note-split */
     overflow: auto;
     contain: none !important;
 }

apps/client/src/widgets/note_detail.ts

@@ -39,6 +39,7 @@ const TPL = /*html*/`
 <div class="note-detail">
     <style>
     .note-detail {
+        max-width: var(--max-content-width); /* Inherited from .note-split */
         font-family: var(--detail-font-family);
         font-size: var(--detail-font-size);
     }

apps/server/src/assets/views/desktop.ejs

@@ -29,8 +29,8 @@
 <%- include("./partials/windowGlobal.ejs", locals) %>
 
 <style>
-    .note-split {
-        max-width: <%= maxContentWidth %>px;
+    :root {
+        --preferred-max-content-width: <%= maxContentWidth %>px;
     }
 </style>