fix(admin): improve portable text editor controls

.changeset/refine-portable-text-editor.md

@@ -0,0 +1,5 @@
+---
+"@emdash-cms/admin": patch
+---
+
+Improves portable text editing with a centered writing column, a responsive toolbar, clearer empty-state guidance, direct block insertion controls, and floating controls that avoid clipping and toolbar overlap.

packages/admin/src/components/ContentEditor.tsx

@@ -1174,7 +1174,7 @@ function FieldRenderer({
 					<PortableTextEditor
 						value={Array.isArray(value) ? value : []}
 						onChange={handleChange}
-						placeholder={t`Enter ${label.toLowerCase()}...`}
+						placeholder={t`Start writing, or type '/' for commands`}
 						aria-labelledby={labelId}
 						pluginBlocks={pluginBlocks}
 						onEditorReady={onEditorReady}