CommonComposeViewModel: filter all unrelated autocomplete suggestions

app/src/main/java/com/keylesspalace/tusky/adapter/ComposeAutoCompleteAdapter.java

@@ -267,7 +267,7 @@ public class ComposeAutoCompleteAdapter extends BaseAdapter
     }
 
     public final static class AccountResult extends AutocompleteResult {
-        private final Account account;
+        public final Account account;
 
         public AccountResult(Account account) {
             this.account = account;

app/src/main/java/com/keylesspalace/tusky/components/common/CommonComposeViewModel.kt

@@ -252,9 +252,13 @@ open class CommonComposeViewModel(
         when (token[0]) {
             '@' -> {
                 return try {
-                    api.searchAccounts(query = token.substring(1), limit = 10)
+                    val acct = token.substring(1)
+                    api.searchAccounts(query = acct, resolve = true, limit = 10)
                             .blockingGet()
                             .map { ComposeAutoCompleteAdapter.AccountResult(it) }
+                            .filter {
+                                it.account.username.startsWith(acct, ignoreCase = true)
+                            }
                 } catch (e: Throwable) {
                     Log.e(TAG, String.format("Autocomplete search for %s failed.", token), e)
                     emptyList()