eval: a verb governed by "ты" is his, not her drift (V-462)

CheckFeminine flagged "ты заплатил за домен" as a masculine self-reference.
The second pass reads a masculine past-tense verb before "тебе", "тебя" or
"за" as her speaking with the pronoun dropped, and it checked neither the
subject nor what "за" pointed at. He is male, so a verb governed by "ты"
must be masculine, and "за домен" is a price rather than a favour.

The talk fixture was under-reporting by a point whenever a reply addressed
him in the past tense, which is common.

internal/phraser/eval/eval_test.go

@@ -106,6 +106,12 @@ func TestChecksCatchWhatTheyClaim(t *testing.T) {
 		{"masculine predicative", "я должен сказать: попей воды.", CheckFeminine},
 		// The other direction: HE is male, so second-person masculine is right.
 		{"second person masculine ok", "ты не пил воду четыре часа.", ""},
+		// The recorded false positive: "заплатил" sits before "за", and the
+		// second pass read that as her dropping the pronoun. The subject is
+		// "ты" and he is male, so the reply is right (Vikunja #462).
+		{"second person masculine before за", "ты заплатил за домен до марта, а воду пить всё равно надо.", ""},
+		// The same shape she really does get wrong still trips.
+		{"masculine on his behalf", "проверил за тебя — воды не было четыре часа.", CheckFeminine},
 		// The real observed failure: she addressed him as a woman.
 		{"feminine second person", "ты давно не отдыхала — попей воды.", CheckHisGender},
 		{"feminine second person no dash", "ты пила воду четыре часа назад.", CheckHisGender},