refactor(superdoc): optional-chain two callable-optional sites (SD-2867 phase B) (#3068)

* refactor(superdoc): type three implicit-any locals (SD-2867 phase B)

* refactor(superdoc): type four implicit-any params (SD-2867 phase B)

* refactor(superdoc): cast doc.ydoc in setLocked (SD-2867 phase B)

* refactor(superdoc): drop redundant === false checks (SD-2867 phase B)

* refactor(superdoc): optional-chain two callable-optional sites (SD-2867 phase B)

* fix(superdoc): soften onContentError optional-chain comment (SD-2867 phase B)

Author: caio-pizzol

packages/superdoc/src/core/SuperDoc.js

@@ -1015,7 +1015,13 @@ export class SuperDoc extends EventEmitter {
   onContentError({ error, editor }) {
     const { documentId } = editor.options;
     const doc = this.superdocStore.documents.find((d) => d.id === documentId);
-    this.config.onContentError({ error, editor, documentId: doc.id, file: doc.data });
+    // `onContentError` is typed as optional on the public Config typedef
+    // because consumers don't have to wire a handler. The class field
+    // initializer installs a `() => null` default, but `#init` spreads
+    // the consumer-supplied config over it (`{ ...this.config, ...config }`),
+    // so an explicit `onContentError: undefined` can still strip the
+    // default. The optional chain keeps the call safe in that case.
+    this.config.onContentError?.({ error, editor, documentId: doc.id, file: doc.data });
   }
 
   /**
@@ -1855,7 +1861,11 @@ export class SuperDoc extends EventEmitter {
    */
   setHighContrastMode(isHighContrast) {
     if (!this.activeEditor) return;
-    this.activeEditor.setHighContrastMode(isHighContrast);
+    // `setHighContrastMode` is typed as optional on Editor because the
+    // method is only present once the editor's mount hooks run. By the
+    // time this entry point is reachable the editor is fully constructed
+    // and the method is installed, so the optional chain is a no-op.
+    this.activeEditor.setHighContrastMode?.(isHighContrast);
     this.highContrastModeStore.setHighContrastMode(isHighContrast);
   }
 }