fix: fullpage editor large text via .fullpage-editor CSS, AI tabs no-wrap, tone selector stronger style, doc-info panel redesign

memento-note/components/note-editor.tsx

@@ -838,11 +838,11 @@ export function NoteEditor({ note, readOnly = false, onClose, fullPage = false }
               {/* Content area — max-w-2xl, like prototype */}
               <div className="max-w-2xl mx-auto pb-32">
                 {noteType === 'richtext' ? (
-                  <div className="prose prose-lg dark:prose-invert max-w-none [&_.notion-editor]:min-h-[280px]">
+                  <div className="fullpage-editor">
                     <RichTextEditor
                       content={content}
                       onChange={(v) => { setContent(v); setIsDirty(true) }}
-                      className="min-h-[280px] text-lg font-light leading-relaxed"
+                      className="min-h-[280px]"
                       onImageUpload={uploadImageFile}
                     />
                   </div>