diff --git a/frontend/src/app/workspace/component/property-editor/operator-property-edit-frame/operator-property-edit-frame.component.spec.ts b/frontend/src/app/workspace/component/property-editor/operator-property-edit-frame/operator-property-edit-frame.component.spec.ts
index daea90d2d66..3e8d10cb1e2 100644
--- a/frontend/src/app/workspace/component/property-editor/operator-property-edit-frame/operator-property-edit-frame.component.spec.ts
+++ b/frontend/src/app/workspace/component/property-editor/operator-property-edit-frame/operator-property-edit-frame.component.spec.ts
@@ -68,6 +68,7 @@ import { of, Subject, throwError } from "rxjs";
 import { WorkflowVersionService } from "../../../../dashboard/service/user/workflow-version/workflow-version.service";
 import { GuiConfigService } from "../../../../common/service/gui-config.service";
 import { PresetWrapperComponent } from "src/app/common/formly/preset-wrapper/preset-wrapper.component";
+import * as Y from "yjs";
 
 const { marbles } = configure({ run: false });
 
@@ -2899,4 +2900,166 @@ describe("OperatorPropertyEditFrameComponent", () => {
       );
     });
   });
+
+  /**
+   * The spec's default TestBed swaps the template for a stub, so the collaborative title editor —
+   * the Quill instance the component mounts on `#customName` and the keyboard bindings it configures
+   * — is never built by anything above. This block renders the real template and drives that editor.
+   * It comes last in the file deliberately: Quill 2 has no `destroy()`, so each instance leaves a
+   * MutationObserver and document listeners behind for `fixture.destroy()` to detach, and it must not
+   * be combined with `fakeAsync` (zone.js patches MutationObserver).
+   */
+  describe("quill title editing", () => {
+    let quillFixture: ComponentFixture<OperatorPropertyEditFrameComponent>;
+    let quillComponent: OperatorPropertyEditFrameComponent;
+    let texeraGraph: WorkflowGraph;
+
+    beforeEach(async () => {
+      TestBed.resetTestingModule();
+      await TestBed.configureTestingModule({
+        providers: [
+          WorkflowActionService,
+          { provide: OperatorMetadataService, useClass: StubOperatorMetadataService },
+          { provide: ComputingUnitStatusService, useClass: MockComputingUnitStatusService },
+          DatePipe,
+          ...commonTestProviders,
+        ],
+        imports: [
+          OperatorPropertyEditFrameComponent,
+          BrowserAnimationsModule,
+          FormsModule,
+          FormlyModule.forRoot(TEXERA_FORMLY_CONFIG),
+          FormlyNgZorroAntdModule,
+          ReactiveFormsModule,
+          HttpClientTestingModule,
+        ],
+      }).compileComponents();
+
+      quillFixture = TestBed.createComponent(OperatorPropertyEditFrameComponent);
+      quillComponent = quillFixture.componentInstance;
+      // Downcast to the concrete graph: `getSharedOperatorType` is not on the readonly view.
+      texeraGraph = TestBed.inject(WorkflowActionService).getTexeraGraph() as WorkflowGraph;
+      quillFixture.detectChanges();
+    });
+
+    afterEach(() => {
+      vi.restoreAllMocks();
+      quillFixture.destroy();
+    });
+
+    /** Opens the editor the only way a user can — the title section's edit button. */
+    function openEditorFromButton(): Y.Text {
+      const sharedOperator = new Y.Doc().getMap("operator");
+      quillComponent.currentOperatorId = mockScanPredicate.operatorID;
+      // `interactive` defaults to false, which renders the edit button disabled — a disabled button
+      // swallows the click silently and the editor would never mount.
+      quillComponent.interactive = true;
+      vi.spyOn(texeraGraph, "getSharedOperatorType").mockReturnValue(sharedOperator as any);
+      quillFixture.detectChanges();
+
+      quillFixture.debugElement.query(By.css("#formly-title button")).nativeElement.click();
+      quillFixture.detectChanges();
+
+      expect(quillComponent.editingTitle).toBe(true);
+      expect(quillComponent.quillBinding).toBeDefined();
+      // The map genuinely lacked the key, so this Y.Text can only have come from the connect call.
+      const sharedTitle = sharedOperator.get("customDisplayName");
+      expect(sharedTitle).toBeInstanceOf(Y.Text);
+      return sharedTitle as Y.Text;
+    }
+
+    /**
+     * An operator display name is a single-line value, so the editor binds Enter to "commit and
+     * close" instead of letting Quill insert a newline. Everything typed here goes straight into the
+     * shared Y.Text, so a stray "\n" is published to every co-editor, persisted with the workflow,
+     * and read back on each later open. Quill 2 buckets keyboard bindings by `event.key` and runs its
+     * built-in `handleEnter` ahead of anything registered under the legacy `13` keycode, which is how
+     * the suppression stopped working when the frontend moved to Quill 2 (#8053). The template's
+     * `(keyup.enter)` closes the editor either way — a keydown-only press is what separates a working
+     * binding from a broken one, in both the text left behind and `editingTitle`.
+     */
+    const ENTER: KeyboardEventInit = { key: "Enter", keyCode: 13, which: 13 };
+
+    /**
+     * Quill's keydown listener returns early unless the editor `hasFocus()` and reports a selection,
+     * so both have to be real here — without them no binding runs at all and every assertion below
+     * would pass vacuously. `keyCode` / `which` mirror what a browser sends: Quill matches a binding
+     * on either, and jsdom's default of 0 would make a `13`-keyed binding unreachable rather than
+     * merely out-prioritised, hiding the very defect these tests pin.
+     */
+    function pressKey(caret: number, init: KeyboardEventInit): KeyboardEvent {
+      quillComponent.quill.root.focus();
+      quillComponent.quill.setSelection(caret, 0);
+      const keyPress = new KeyboardEvent("keydown", { bubbles: true, cancelable: true, ...init });
+      quillComponent.quill.root.dispatchEvent(keyPress);
+      quillFixture.detectChanges();
+      return keyPress;
+    }
+
+    it("should show a remote rename in the mounted editor", () => {
+      const sharedTitle = openEditorFromButton();
+
+      sharedTitle.insert(0, "renamed remotely");
+
+      // Without this the keyboard tests below could pass against an editor wired to nothing.
+      expect((document.getElementById("customName") as HTMLElement).textContent).toContain("renamed remotely");
+    });
+
+    it("should commit the rename on Enter without appending a newline to the shared name", () => {
+      const sharedTitle = openEditorFromButton();
+      sharedTitle.insert(0, "renamed");
+
+      pressKey(sharedTitle.length, ENTER);
+
+      expect(sharedTitle.toString()).toBe("renamed");
+      // `editingTitle` is what proves the editor's own binding ran: no keyup was dispatched, so the
+      // template's fallback cannot be the thing that closed the editor.
+      expect(quillComponent.editingTitle).toBe(false);
+      expect(quillComponent.quillBinding).toBeUndefined();
+    });
+
+    it("should not split the shared name when Enter is pressed mid-word", () => {
+      const sharedTitle = openEditorFromButton();
+      sharedTitle.insert(0, "renamed");
+
+      pressKey(3, ENTER);
+
+      expect(sharedTitle.toString()).toBe("renamed");
+      expect(quillComponent.editingTitle).toBe(false);
+    });
+
+    it("should leave an untouched name empty when Enter commits it", () => {
+      const sharedTitle = openEditorFromButton();
+
+      pressKey(0, ENTER);
+
+      // The empty document is the case Quill's own handler turns into a lone "\n" — a display name
+      // that reads as blank but is no longer equal to the empty string it started as.
+      expect(sharedTitle.toString()).toBe("");
+      expect(quillComponent.editingTitle).toBe(false);
+    });
+
+    it("should commit on Shift+Enter without appending a newline either", () => {
+      const sharedTitle = openEditorFromButton();
+      sharedTitle.insert(0, "renamed");
+
+      pressKey(sharedTitle.length, { ...ENTER, shiftKey: true });
+
+      expect(sharedTitle.toString()).toBe("renamed");
+      expect(quillComponent.editingTitle).toBe(false);
+    });
+
+    it("should leave ordinary typing alone", () => {
+      const sharedTitle = openEditorFromButton();
+      sharedTitle.insert(0, "renamed");
+
+      const keyPress = pressKey(sharedTitle.length, { key: "a", keyCode: 65, which: 65 });
+
+      // Suppressing Enter must not become suppressing the keyboard: an ordinary character is left
+      // for the browser to insert, and the editor stays open so the rename can continue.
+      expect(keyPress.defaultPrevented).toBe(false);
+      expect(quillComponent.editingTitle).toBe(true);
+      expect(quillComponent.quillBinding).toBeDefined();
+    });
+  });
 });
diff --git a/frontend/src/app/workspace/component/property-editor/operator-property-edit-frame/operator-property-edit-frame.component.ts b/frontend/src/app/workspace/component/property-editor/operator-property-edit-frame/operator-property-edit-frame.component.ts
index beedbabd90f..9c8287b8a86 100644
--- a/frontend/src/app/workspace/component/property-editor/operator-property-edit-frame/operator-property-edit-frame.component.ts
+++ b/frontend/src/app/workspace/component/property-editor/operator-property-edit-frame/operator-property-edit-frame.component.ts
@@ -1415,11 +1415,11 @@ export class OperatorPropertyEditFrameComponent implements OnInit, OnChanges, On
         keyboard: {
           bindings: {
             enter: {
-              key: 13,
+              key: "Enter",
               handler: () => this.disconnectQuillFromText(),
             },
             shift_enter: {
-              key: 13,
+              key: "Enter",
               shiftKey: true,
               handler: () => this.disconnectQuillFromText(),
             },
diff --git a/frontend/src/app/workspace/component/property-editor/port-property-edit-frame/port-property-edit-frame.component.spec.ts b/frontend/src/app/workspace/component/property-editor/port-property-edit-frame/port-property-edit-frame.component.spec.ts
index d12b316d334..3d751dffec7 100644
--- a/frontend/src/app/workspace/component/property-editor/port-property-edit-frame/port-property-edit-frame.component.spec.ts
+++ b/frontend/src/app/workspace/component/property-editor/port-property-edit-frame/port-property-edit-frame.component.spec.ts
@@ -512,7 +512,7 @@ describe("PortPropertyEditFrameComponent", () => {
      * `(focusout)` bindings — unexercised. Without these the whole feature can be unwired from the
      * UI without a single test noticing.
      */
-    function openEditorFromButton(): void {
+    function openEditorFromButton(): Y.Map<unknown> {
       const sharedPortDescription = new Y.Doc().getMap("portDescription");
       component.currentPortID = inputPort;
       vi.spyOn(texeraGraph, "getSharedPortDescriptionType").mockReturnValue(sharedPortDescription);
@@ -522,6 +522,7 @@ describe("PortPropertyEditFrameComponent", () => {
 
       expect(component.editingTitle).toBe(true);
       expect(component.quillBinding).toBeDefined();
+      return sharedPortDescription;
     }
 
     it("should open the collaborative editor from the edit button and close it on Enter", () => {
@@ -543,5 +544,90 @@ describe("PortPropertyEditFrameComponent", () => {
       expect(component.editingTitle).toBe(false);
       expect(component.quillBinding).toBeUndefined();
     });
+
+    /**
+     * A port display name is a single-line value, so the editor binds Enter to "commit and close"
+     * instead of letting Quill insert a newline. Everything typed here goes straight into the shared
+     * Y.Text, so a stray "\n" is published to every co-editor, persisted with the workflow, and read
+     * back on each later open. Quill 2 buckets keyboard bindings by `event.key` and runs its built-in
+     * `handleEnter` ahead of anything registered under the legacy `13` keycode, which is how the
+     * suppression stopped working when the frontend moved to Quill 2 (#8053). The template's
+     * `(keyup.enter)` closes the editor either way — a keydown-only press is what separates a working
+     * binding from a broken one, in both the text left behind and `editingTitle`.
+     */
+    const ENTER: KeyboardEventInit = { key: "Enter", keyCode: 13, which: 13 };
+
+    /**
+     * Quill's keydown listener returns early unless the editor `hasFocus()` and reports a selection,
+     * so both have to be real here — without them no binding runs at all and every assertion below
+     * would pass vacuously. `keyCode` / `which` mirror what a browser sends: Quill matches a binding
+     * on either, and jsdom's default of 0 would make a `13`-keyed binding unreachable rather than
+     * merely out-prioritised, hiding the very defect these tests pin.
+     */
+    function pressKey(caret: number, init: KeyboardEventInit): KeyboardEvent {
+      component.quill.root.focus();
+      component.quill.setSelection(caret, 0);
+      const keyPress = new KeyboardEvent("keydown", { bubbles: true, cancelable: true, ...init });
+      component.quill.root.dispatchEvent(keyPress);
+      fixture.detectChanges();
+      return keyPress;
+    }
+
+    it("should commit the rename on Enter without appending a newline to the shared name", () => {
+      const sharedTitle = openEditorFromButton().get("displayName") as Y.Text;
+      sharedTitle.insert(0, "renamed");
+
+      pressKey(sharedTitle.length, ENTER);
+
+      expect(sharedTitle.toString()).toBe("renamed");
+      // `editingTitle` is what proves the editor's own binding ran: no keyup was dispatched, so the
+      // template's fallback cannot be the thing that closed the editor.
+      expect(component.editingTitle).toBe(false);
+      expect(component.quillBinding).toBeUndefined();
+    });
+
+    it("should not split the shared name when Enter is pressed mid-word", () => {
+      const sharedTitle = openEditorFromButton().get("displayName") as Y.Text;
+      sharedTitle.insert(0, "renamed");
+
+      pressKey(3, ENTER);
+
+      expect(sharedTitle.toString()).toBe("renamed");
+      expect(component.editingTitle).toBe(false);
+    });
+
+    it("should leave an untouched name empty when Enter commits it", () => {
+      const sharedTitle = openEditorFromButton().get("displayName") as Y.Text;
+
+      pressKey(0, ENTER);
+
+      // The empty document is the case Quill's own handler turns into a lone "\n" — a display name
+      // that reads as blank but is no longer equal to the empty string it started as.
+      expect(sharedTitle.toString()).toBe("");
+      expect(component.editingTitle).toBe(false);
+    });
+
+    it("should commit on Shift+Enter without appending a newline either", () => {
+      const sharedTitle = openEditorFromButton().get("displayName") as Y.Text;
+      sharedTitle.insert(0, "renamed");
+
+      pressKey(sharedTitle.length, { ...ENTER, shiftKey: true });
+
+      expect(sharedTitle.toString()).toBe("renamed");
+      expect(component.editingTitle).toBe(false);
+    });
+
+    it("should leave ordinary typing alone", () => {
+      const sharedTitle = openEditorFromButton().get("displayName") as Y.Text;
+      sharedTitle.insert(0, "renamed");
+
+      const keyPress = pressKey(sharedTitle.length, { key: "a", keyCode: 65, which: 65 });
+
+      // Suppressing Enter must not become suppressing the keyboard: an ordinary character is left
+      // for the browser to insert, and the editor stays open so the rename can continue.
+      expect(keyPress.defaultPrevented).toBe(false);
+      expect(component.editingTitle).toBe(true);
+      expect(component.quillBinding).toBeDefined();
+    });
   });
 });
diff --git a/frontend/src/app/workspace/component/property-editor/port-property-edit-frame/port-property-edit-frame.component.ts b/frontend/src/app/workspace/component/property-editor/port-property-edit-frame/port-property-edit-frame.component.ts
index 3eeb4e3fc1c..e8808c2279b 100644
--- a/frontend/src/app/workspace/component/property-editor/port-property-edit-frame/port-property-edit-frame.component.ts
+++ b/frontend/src/app/workspace/component/property-editor/port-property-edit-frame/port-property-edit-frame.component.ts
@@ -248,11 +248,11 @@ export class PortPropertyEditFrameComponent implements OnInit, OnChanges {
         keyboard: {
           bindings: {
             enter: {
-              key: 13,
+              key: "Enter",
               handler: () => this.disconnectQuillFromText(),
             },
             shift_enter: {
-              key: 13,
+              key: "Enter",
               shiftKey: true,
               handler: () => this.disconnectQuillFromText(),
             },
diff --git a/frontend/src/jsdom-svg-polyfill.ts b/frontend/src/jsdom-svg-polyfill.ts
index 1fe62e21477..9aae982cc20 100644
--- a/frontend/src/jsdom-svg-polyfill.ts
+++ b/frontend/src/jsdom-svg-polyfill.ts
@@ -111,6 +111,18 @@ installIfMissing(G.SVGGraphicsElement?.prototype, {
   getBBox: fakeRect as AnyFn,
 });
 
+// `Range.prototype.getBoundingClientRect` — jsdom has no layout engine and
+// doesn't implement it. Quill's `Selection#getBounds` calls it on a live
+// Range to place the caret, and quill-cursors calls it again for every
+// remote cursor an awareness update carries, so any spec that mounts a
+// collaborative editor throws `range.getBoundingClientRect is not a
+// function`. A zeroed rect is enough — jsdom never paints, and specs that
+// need real caret geometry belong in browser mode. `top` / `left` / `right`
+// / `height` are the four fields `getBounds` reads back off it.
+installIfMissing(G.Range?.prototype, {
+  getBoundingClientRect: (() => ({ ...fakeRect(), top: 0, right: 0, bottom: 0, left: 0 })) as AnyFn,
+});
+
 // Constructable Stylesheets API (`new CSSStyleSheet().replaceSync(...)`) —
 // jsdom doesn't ship it, but @codingame/monaco-vscode-api v25 calls it at
 // module load. Stub with an inert constructor; specs don't visually render