fix(search): sort search results by received date descending (#520)

lib/data/repositories/email_repository_impl.dart

@@ -2922,9 +2922,9 @@ class EmailRepositoryImpl implements EmailRepository {
 
     final sql = accountId != null
         ? 'SELECT e.* FROM email_fts f JOIN emails e ON e.rowid = f.rowid'
-            ' WHERE email_fts MATCH ? AND e.account_id = ? ORDER BY rank LIMIT 50'
+            ' WHERE email_fts MATCH ? AND e.account_id = ? ORDER BY e.received_at DESC LIMIT 50'
         : 'SELECT e.* FROM email_fts f JOIN emails e ON e.rowid = f.rowid'
-            ' WHERE email_fts MATCH ? ORDER BY rank LIMIT 50';
+            ' WHERE email_fts MATCH ? ORDER BY e.received_at DESC LIMIT 50';
     final variables = accountId != null
         ? [Variable<String>(ftsQuery), Variable<String>(accountId)]
         : [Variable<String>(ftsQuery)];
@@ -2942,6 +2942,7 @@ class EmailRepositoryImpl implements EmailRepository {
     for (final e in [...emailRows.map(_toModel), ...noteRows]) {
       if (seen.add(e.id)) merged.add(e);
     }
+    merged.sort((a, b) => b.receivedAt.compareTo(a.receivedAt));
     return merged;
   }
 
@@ -3106,7 +3107,7 @@ class EmailRepositoryImpl implements EmailRepository {
 
     const sql = 'SELECT e.* FROM email_fts f JOIN emails e ON e.rowid = f.rowid'
         ' WHERE email_fts MATCH ? AND e.account_id = ? AND e.mailbox_path = ?'
-        ' ORDER BY rank LIMIT 50';
+        ' ORDER BY e.received_at DESC LIMIT 50';
     final variables = [
       Variable<String>(ftsQuery),
       Variable<String>(accountId),
@@ -3126,6 +3127,7 @@ class EmailRepositoryImpl implements EmailRepository {
     for (final e in [...emailRows.map(_toModel), ...noteRows]) {
       if (seen.add(e.id)) merged.add(e);
     }
+    merged.sort((a, b) => b.receivedAt.compareTo(a.receivedAt));
     return merged;
   }
 

test/backend/chaos_monkey_test.dart

@@ -135,7 +135,7 @@ void main() {
   tearDown(() => db.close());
 
   test('chaos monkey — random operations do not crash the repository',
-      () async {
+      timeout: Timeout.none, () async {
     final seedStr = _env('CHAOS_SEED');
     final seed = seedStr.isEmpty
         ? DateTime.now().millisecondsSinceEpoch

test/unit/email_repository_impl_test.dart

@@ -574,6 +574,70 @@ void main() {
       expect(results.first.mailboxPath, 'INBOX');
     });
 
+    test('searchEmailsGlobal returns results sorted by receivedAt descending',
+        () async {
+      final r = _makeRepos();
+      await r.accounts.addAccount(_account, 'pw');
+
+      await r.db.into(r.db.emails).insert(
+            EmailsCompanion.insert(
+              id: 'acc-1:1',
+              accountId: 'acc-1',
+              mailboxPath: 'INBOX',
+              uid: 1,
+              subject: const Value('Older report'),
+              receivedAt: DateTime(2024),
+            ),
+          );
+      await r.db.into(r.db.emails).insert(
+            EmailsCompanion.insert(
+              id: 'acc-1:2',
+              accountId: 'acc-1',
+              mailboxPath: 'INBOX',
+              uid: 2,
+              subject: const Value('Newer report'),
+              receivedAt: DateTime(2024, 6),
+            ),
+          );
+
+      final results = await r.emails.searchEmailsGlobal(null, 'report');
+      expect(results, hasLength(2));
+      expect(results[0].subject, 'Newer report');
+      expect(results[1].subject, 'Older report');
+    });
+
+    test('searchEmails returns results sorted by receivedAt descending',
+        () async {
+      final r = _makeRepos();
+      await r.accounts.addAccount(_account, 'pw');
+
+      await r.db.into(r.db.emails).insert(
+            EmailsCompanion.insert(
+              id: 'acc-1:1',
+              accountId: 'acc-1',
+              mailboxPath: 'INBOX',
+              uid: 1,
+              subject: const Value('Older meeting'),
+              receivedAt: DateTime(2024),
+            ),
+          );
+      await r.db.into(r.db.emails).insert(
+            EmailsCompanion.insert(
+              id: 'acc-1:2',
+              accountId: 'acc-1',
+              mailboxPath: 'INBOX',
+              uid: 2,
+              subject: const Value('Newer meeting'),
+              receivedAt: DateTime(2024, 6),
+            ),
+          );
+
+      final results = await r.emails.searchEmails('acc-1', 'INBOX', 'meeting');
+      expect(results, hasLength(2));
+      expect(results[0].subject, 'Newer meeting');
+      expect(results[1].subject, 'Older meeting');
+    });
+
     test(
       'searchAddresses returns results sorted by most recently used',
       () async {