refactor(case): normalize route composition with fileRouteBuilder

tests/phase6/service-behaviour.test.cjs

@@ -138,6 +138,30 @@ test("case/getCaseMessage returns error.response on failure", async () => {
     assert.strictEqual(logger.calls.length, 1);
 });
 
+test("case/getPortalModuleDetails composes BASE_URL route with encoded case reference", async () => {
+    const axios = createAxiosMock();
+    const logger = createLoggerMock();
+
+    axios.getHandler = async () => ({ data: { value: [] } });
+
+    const caseService = loadServiceModule("caseDirectService.js", {
+        axios,
+        BASE_URL: "http://example.local",
+        consoleLogger: logger.consoleLogger
+    });
+
+    const result = await caseService.getPortalModuleDetails(
+        "appeal",
+        "REF A/B"
+    );
+
+    assert.deepStrictEqual(normalize(result), { value: [] });
+    assert.strictEqual(
+        axios.calls[0].url,
+        "http://example.local/api/endpoint/getportalmoduledetails_api?appealType=appeal&caseReference=REF%20A/B"
+    );
+});
+
 test("admin/getNewAppealsPage returns res.data on success", async () => {
     const axios = createAxiosMock();
     const logger = createLoggerMock();