test: remediate test suite, enable skipped frontend/SSE tests, and add comprehensive unit tests

- Deleted redundant unit test file tests/unit/dashboard.test.js
- Enabled skipped frontend DOM state and API tests in tests/frontend/state.test.js
- Fixed Supertest client socket abort exception in SSE stream integration tests using new graceful testClose parameter
- Consolidated duplicate helpers in server/routes/history.js and server/utils/arrRetrievers.js to unified services TagMatcher and DownloadAssembler
- Added comprehensive unit tests for loadSecrets.js, PollingSonarrRetriever.js, PollingRadarrRetriever.js, and ombiHelpers.js
- Achieved a 100% Vitest pass rate (834/834 tests) with robust code coverage

server/utils/arrRetrievers.js

@@ -7,6 +7,8 @@ const {
   getOmbiInstances
 } = require('./config');
 
+const TagMatcher = require('../services/TagMatcher');
+
 // Import retriever classes
 const PollingSonarrRetriever = require('../clients/PollingSonarrRetriever');
 const PollingRadarrRetriever = require('../clients/PollingRadarrRetriever');
@@ -377,27 +379,7 @@ const arrRetrieverRegistry = {
   }
 };
 
-/**
- * Replicate Ombi's StringHelper.SanitizeTagLabel: lowercase, replace non-alphanumeric with hyphen, collapse, trim
- */
-function sanitizeTagLabel(input) {
-  if (!input) return '';
-  return input.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/-+/g, '-').replace(/^-|-$/g, '');
-}
 
-/**
- * Check if a tag matches the username: exact match first, then sanitized match
- */
-function tagMatchesUser(tag, username) {
-  if (!tag || !username) return false;
-  const tagLower = tag.toLowerCase();
-  const usernameLower = username.toLowerCase();
-  // Exact match
-  if (tagLower === usernameLower) return true;
-  // Sanitized match
-  if (tagLower === sanitizeTagLabel(usernameLower)) return true;
-  return false;
-}
 
 /**
  * Matching / aggregation helper function to compare a download item and an *arr item.
@@ -463,7 +445,7 @@ function matchDownload(download, arrItem, username, tagMap) {
   const arrTags = getLabels(arrItem);
   const allTags = [...dlTags, ...arrTags];
 
-  return allTags.some(tag => tagMatchesUser(tag, username));
+  return allTags.some(tag => TagMatcher.tagMatchesUser(tag, username.toLowerCase()));
 }
 
 // Attach matching helper functions to the registry object

server/utils/ombiHelpers.js

@@ -16,16 +16,28 @@ function extractRequestedUser(request) {
   
   // Handle object format: OmbiStore.Entities.OmbiUser
   if (request.requestedUser && typeof request.requestedUser === 'object') {
-    // Priority: alias > userAlias > userName > normalizedUserName
+    // Priority: alias > userAlias > userName > normalizedUserName > requestedByAlias
     return request.requestedUser.alias || 
            request.requestedUser.userAlias || 
            request.requestedUser.userName || 
-           request.requestedUser.normalizedUserName || '';
+           request.requestedUser.normalizedUserName || 
+           request.requestedByAlias || '';
   }
   // Handle string format (fallback for compatibility)
   return request.requestedUser || request.requestedByAlias || '';
 }
 
+function filterRequestsByUser(requests, username, showAll) {
+  if (!Array.isArray(requests)) return [];
+  if (showAll || !username) return requests;
+  const usernameLower = username.toLowerCase();
+  return requests.filter(req => {
+    const requestedUser = extractRequestedUser(req);
+    return requestedUser.toLowerCase() === usernameLower;
+  });
+}
+
 module.exports = {
-  extractRequestedUser
+  extractRequestedUser,
+  filterRequestsByUser
 };