Rebase onto master and address packaging feedback

docs/README.md

@@ -71,6 +71,12 @@ Packagers may exclude `docs/_theme/basicstrap/` from the source package.
 The default theme continues to build without that directory. No pre-minified
 third-party assets need to be added or rebuilt for this theme.
 
+The Meson option `-Dinstall-docs` defaults to `false`, so platforms that
+do not ship offline documentation do not need Sphinx just to build ZoiteChat.
+Pass `-Dinstall-docs=true` when packaging local HTML documentation. Fedora
+and AppImage enable it explicitly; the Debian documentation package can do
+the same.
+
 Build with the distribution's `python3-sphinx`. After installing the HTML
 into the package staging directory, use `dh_sphinxdoc` (or `dh --with
 sphinxdoc`) to replace Sphinx's standard JavaScript files with system

docs/_static/css/zoitechat-docs.css

@@ -807,7 +807,7 @@ a.headerlink:focus-visible {
 :root {
     --page: var(--bg);
     --panel: var(--chrome);
-    --font: system-ui, -apple-system, "Segoe UI", sans-serif;
+    --font: system-ui, -apple-system, "Segoe UI", "DejaVu Sans", sans-serif;
 }
 .site-header { padding: 0; }
 .appearance select { min-height: 0; border-radius: 3px; }

docs/_static/css/zoitechat-site.css

@@ -16,7 +16,7 @@
     --success: #236741;
     --code: #f2f4f6;
     --shadow: none;
-    --mono: Consolas,"Liberation Mono",monospace;
+    --mono: Consolas,"DejaVu Sans Mono","Liberation Mono",monospace;
 }
 
 html[data-theme=dark] {
@@ -45,7 +45,7 @@ body {
     margin: 0;
     background: var(--bg);
     color: var(--text);
-    font: 15px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif;
+    font: 15px/1.6 system-ui,-apple-system,"Segoe UI","DejaVu Sans",sans-serif;
 }
 
 a {