fix(test): resolve unit test failures in batch fetch and profile modal

- Mock `readRelays` in `tests/app-batch-fetch-profiles.test.mjs` to correctly reflect `profileMetadataService` prioritization logic, ensuring relay query count assertions match actual execution (2 queries instead of 4).
- Add missing `load` mock to `hashtagPreferences` in `tests/profile-modal-controller.test.mjs` to prevent `TypeError` during `handleAddHashtagPreference` test.
- Verified all unit tests pass with `npm run test:unit`.
- Verified `npm run build` succeeds locally.
- Verified `_headers` and `_redirects` are present and valid in `dist/`.

This commit addresses the CI failures reported by the user, including the `agent-review` failure and likely resolving the associated 'Deploy failed' checks.

Co-authored-by: PR0M3TH3AN <[email protected]>

tests/app-batch-fetch-profiles.test.mjs

@@ -49,6 +49,9 @@ test("batchFetchProfiles handles fast and failing relays", async () => {
   const originalRelays = Array.isArray(nostrClient.relays)
     ? [...nostrClient.relays]
     : [];
+  const originalReadRelays = Array.isArray(nostrClient.readRelays)
+    ? [...nostrClient.readRelays]
+    : nostrClient.readRelays;
   const originalWriteRelays = Array.isArray(nostrClient.writeRelays)
     ? [...nostrClient.writeRelays]
     : nostrClient.writeRelays;
@@ -57,6 +60,7 @@ test("batchFetchProfiles handles fast and failing relays", async () => {
   const poolListCalls = [];
 
   nostrClient.relays = [FAST_RELAY, FAIL_RELAY];
+  nostrClient.readRelays = [FAST_RELAY, FAIL_RELAY];
   nostrClient.writeRelays = [FAST_RELAY, FAIL_RELAY];
   nostrClient.pool = {
     list: (relays, filters) => {
@@ -92,6 +96,7 @@ test("batchFetchProfiles handles fast and failing relays", async () => {
     });
   } finally {
     nostrClient.relays = originalRelays;
+    nostrClient.readRelays = originalReadRelays;
     nostrClient.writeRelays = originalWriteRelays;
     nostrClient.pool = originalPool;
   }

tests/profile-modal-controller.test.mjs

@@ -275,6 +275,7 @@ function createController(options = {}) {
     },
     publish: async () => ({ ok: true }),
     on: () => () => {},
+    load: async () => {},
   };
 
   const hashtagPreferences = {