feat(studio): wire hfId through DOM-edit patch targets, activate hfId lookup path (R7, T5a)

packages/studio/src/components/editor/domEditing.ts

@@ -26,6 +26,7 @@ export {
 // Layers, text fields, capabilities, selection, patch ops
 export {
   buildDefaultDomEditTextField,
+  buildDomEditPatchTarget,
   buildDomEditStylePatchOperation,
   buildDomEditTextPatchOperation,
   collectDomEditLayerItems,

packages/studio/src/components/editor/domEditingLayers.test.ts

@@ -1,9 +1,32 @@
 // @vitest-environment jsdom
 import { describe, expect, it } from "vitest";
-import { resolveDomEditSelection } from "./domEditingLayers";
+import { resolveDomEditSelection, buildDomEditPatchTarget } from "./domEditingLayers";
 
 const opts = { activeCompositionPath: "index.html", isMasterView: true, skipSourceProbe: true };
 
+describe("buildDomEditPatchTarget", () => {
+  it("includes hfId when selection has hfId", () => {
+    const target = buildDomEditPatchTarget({
+      id: undefined,
+      hfId: "hf-abc",
+      selector: ".foo",
+      selectorIndex: 0,
+    });
+    expect(target.hfId).toBe("hf-abc");
+  });
+
+  it("includes id and selector when hfId absent", () => {
+    const target = buildDomEditPatchTarget({
+      id: "hero",
+      hfId: undefined,
+      selector: "#hero",
+      selectorIndex: undefined,
+    });
+    expect(target.id).toBe("hero");
+    expect(target.hfId).toBeUndefined();
+  });
+});
+
 describe("resolveDomEditSelection — hfId from data-hf-id", () => {
   it("populates hfId from the element data-hf-id attribute", async () => {
     const el = document.createElement("div");

packages/studio/src/components/editor/domEditingLayers.ts

@@ -555,3 +555,14 @@ export function isTextEditableSelection(selection: DomEditSelection): boolean {
 }
 
 // buildElementAgentPrompt is in domEditingAgentPrompt.ts
+
+export function buildDomEditPatchTarget(
+  selection: Pick<DomEditSelection, "id" | "hfId" | "selector" | "selectorIndex">,
+): { id?: string | null; hfId?: string; selector?: string; selectorIndex?: number } {
+  return {
+    id: selection.id,
+    hfId: selection.hfId,
+    selector: selection.selector,
+    selectorIndex: selection.selectorIndex,
+  };
+}

packages/studio/src/hooks/useDomEditCommits.ts

@@ -5,7 +5,11 @@ import type { PatchOperation } from "../utils/sourcePatcher";
 import { trackStudioEvent } from "../utils/studioTelemetry";
 import { saveProjectFilesWithHistory } from "../utils/studioFileHistory";
 import { primaryFontFamilyValue } from "../utils/studioFontHelpers";
-import { getDomEditTargetKey, type DomEditSelection } from "../components/editor/domEditing";
+import {
+  buildDomEditPatchTarget,
+  getDomEditTargetKey,
+  type DomEditSelection,
+} from "../components/editor/domEditing";
 import {
   applyStudioPathOffset,
   applyStudioBoxSize,
@@ -182,11 +186,7 @@ export function useDomEditCommits({
 
       if (options?.shouldSave && !options.shouldSave()) return;
 
-      const patchTarget: { id?: string | null; selector?: string; selectorIndex?: number } = {
-        id: selection.id,
-        selector: selection.selector,
-        selectorIndex: selection.selectorIndex,
-      };
+      const patchTarget = buildDomEditPatchTarget(selection);
 
       // Mark the save timestamp before the file write so the SSE file-change
       // handler suppresses the reload even if the event arrives before the
@@ -471,16 +471,8 @@ export function useDomEditCommits({
         if (typeof originalContent !== "string")
           throw new Error(`Missing file contents for ${targetPath}`);
 
-        const patchTarget: { id?: string; selector?: string; selectorIndex?: number } = selection.id
-          ? {
-              id: selection.id,
-              selector: selection.selector,
-              selectorIndex: selection.selectorIndex,
-            }
-          : selection.selector
-            ? { selector: selection.selector, selectorIndex: selection.selectorIndex }
-            : ({} as never);
-        if (!patchTarget.id && !patchTarget.selector) {
+        const patchTarget = buildDomEditPatchTarget(selection);
+        if (!patchTarget.id && !patchTarget.selector && !patchTarget.hfId) {
           throw new Error("Selected element has no patchable target");
         }
 
@@ -561,6 +553,7 @@ export function useDomEditCommits({
           {
             element: entry.element,
             id: entry.id ?? null,
+            hfId: entry.element.getAttribute("data-hf-id") ?? undefined,
             selector: entry.selector,
             selectorIndex: entry.selectorIndex,
             sourceFile: entry.sourceFile,