fix(javascript): bind Next page admission to source context

src/domain/javascript/javascriptRouteInventory.test.ts

@@ -20,12 +20,52 @@ const source = (
   status: "complete",
   reason: null,
   facts: analyzeJavaScriptStaticSource(text).routes!,
+  ...(url === null && key.startsWith("app/")
+    ? {
+        next_app_context: {
+          kind: "app-directory" as const,
+          directory: "app",
+          package: {
+            path: "package.json",
+            sha256: "b".repeat(64),
+            container_sha256: "c".repeat(64),
+          },
+        },
+      }
+    : {}),
 });
 const build = (inputs: JavaScriptRouteInventoryInput[], bytes?: number) =>
   javaScriptRouteInventorySchema.parse(
     completeSemanticSteps(buildJavaScriptRouteInventorySteps(inputs, bytes)),
   );
 
+it("does not promote page-shaped paths without source-router applicability", () => {
+  const unknown = source("app/page.js", "");
+  delete (unknown as { next_app_context?: unknown }).next_app_context;
+  const result = build([unknown]);
+  expect(result.routes).toEqual([]);
+  expect(result.unknowns).toMatchObject([
+    { kind: "interpretation", reason: expect.stringContaining("not measured") },
+  ]);
+});
+
+it("binds source identity to the package evidence establishing router applicability", () => {
+  const first = source("app/page.js", "");
+  const context = first.next_app_context;
+  if (context?.kind !== "app-directory")
+    throw new Error("Expected declared fixture context");
+  const second = {
+    ...first,
+    next_app_context: {
+      ...context,
+      package: { ...context.package, sha256: "d".repeat(64) },
+    },
+  };
+  expect(build([first]).sources[0]!.id).not.toBe(
+    build([second]).sources[0]!.id,
+  );
+});
+
 it("coalesces exact patterns while retaining independent occurrences and stable identities", () => {
   const inputs = [
     source("one.js", `router.push('/reports');`),