fix: Make all editor footer buttons equal size (40x40px)

src/css/components.css

@@ -574,6 +574,16 @@
   flex-wrap: wrap;
   gap: var(--spacing-sm);
 }
+.editor-actions .btn-ghost,
+.editor-actions .doc-dropdown .btn-ghost {
+  width: 40px;
+  height: 40px;
+  min-height: 40px;
+  padding: 0;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
 
 /* ── Buttons ── */
 .btn-ghost {