fix(build): ship export session html assets

Align the export-session template asset copy step and build-all cache output with the runtime lookup path so published packages include the HTML export assets at `dist/export-html`.

Adds a focused build-all regression assertion for the output path contract.

Fixes #90843

scripts/build-all.mjs

@@ -132,7 +132,7 @@ export const BUILD_ALL_STEPS = [
         "scripts/lib/copy-assets.ts",
         "src/auto-reply/reply/export-html",
       ],
-      outputs: ["dist/auto-reply/reply/export-html"],
+      outputs: ["dist/export-html"],
     },
   },
   {

scripts/copy-export-html-templates.ts

@@ -16,13 +16,7 @@ const exportHtmlSrcDir = path.join(
   "reply",
   "export-html",
 );
-const exportHtmlDistDir = path.join(
-  context.projectRoot,
-  "dist",
-  "auto-reply",
-  "reply",
-  "export-html",
-);
+const exportHtmlDistDir = path.join(context.projectRoot, "dist", "export-html");
 
 function copyExportHtmlTemplates() {
   if (!fs.existsSync(exportHtmlSrcDir)) {

test/scripts/build-all.test.ts

@@ -173,6 +173,12 @@ describe("resolveBuildAllStep", () => {
     expect(step.cache?.inputs).toEqual(expect.arrayContaining(["npm-shrinkwrap.json"]));
     expect(step.cache?.outputs).toEqual(expect.arrayContaining(["dist/plugin-sdk/packages"]));
   });
+
+  it("keeps export-html build output aligned with runtime template lookup", () => {
+    const step = getBuildAllStep("copy-export-html-templates");
+
+    expect(step.cache?.outputs).toEqual(["dist/export-html"]);
+  });
 });
 
 describe("resolveBuildAllSteps", () => {