fix: normalize housekeeping root routes

src/features/housekeeping/migration/discover-legacy-pages.test.ts

@@ -42,6 +42,42 @@ describe("discoverLegacyPages", () => {
 		});
 	});
 
+	it("discovers root administration and moderation routes", () => {
+		expect(discoverLegacyPages()).toEqual(
+			expect.arrayContaining([
+				{
+					surface: "admin",
+					legacyPath: "/admin",
+					sourceFile: "src/app/admin/page.tsx",
+				},
+				{
+					surface: "mod",
+					legacyPath: "/mod",
+					sourceFile: "src/app/mod/page.tsx",
+				},
+			]),
+		);
+	});
+
+	it("discovers root routes in a controlled route tree", () => {
+		const root = createRouteTree([
+			"src/app/admin/page.tsx",
+			"src/app/mod/page.tsx",
+		]);
+
+		expect(discoverLegacyPages(root)).toEqual([
+			{
+				surface: "admin",
+				legacyPath: "/admin",
+				sourceFile: "src/app/admin/page.tsx",
+			},
+			{
+				surface: "mod",
+				legacyPath: "/mod",
+				sourceFile: "src/app/mod/page.tsx",
+			},
+		]);
+	});
 	it("sorts a controlled route tree by surface, route, then source file", () => {
 		const root = createRouteTree([
 			"src/app/mod/zebra/page.tsx",