Merge the address-form eval check

The check asks whether anyone else was named before "он". Time words
were not stoplisted, so "сегодня он не ел" read "сегодня" as the person
being talked about and passed — which is the recorded break with a word
in front of it, and nudges open with those words constantly.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CGeSZxh1DCtRxmFVSYVGvJ

cmd/mavend/system_reply_test.go

@@ -0,0 +1,78 @@
+package main
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/kami/maven/internal/router"
+)
+
+// systemHandler — a handler with nothing but a fixed clock, which is all
+// replySystem needs.
+func systemHandler(now time.Time) *reactiveHandler {
+	return &reactiveHandler{now: func() time.Time { return now }}
+}
+
+// TestReplySystemDateOffset — "какое число завтра" must answer tomorrow's
+// date, not today's (Vikunja #388).
+func TestReplySystemDateOffset(t *testing.T) {
+	// Thursday, 30 July 2026.
+	now := time.Date(2026, 7, 30, 14, 5, 0, 0, time.UTC)
+	h := systemHandler(now)
+	cases := []struct{ utterance, want string }{
+		{"какое сегодня число", "сегодня четверг, 30 июля 2026 года"},
+		{"какое число", "сегодня четверг, 30 июля 2026 года"},
+		{"какое число завтра", "завтра пятница, 31 июля 2026 года"},
+		{"какое число послезавтра", "послезавтра суббота, 1 августа 2026 года"},
+		{"какое было число вчера", "вчера среда, 29 июля 2026 года"},
+	}
+	for _, c := range cases {
+		got := h.replySystem(context.Background(), router.Decision{Utterance: c.utterance})
+		if got != c.want {
+			t.Errorf("replySystem(%q) = %q, want %q", c.utterance, got, c.want)
+		}
+	}
+}
+
+// A day she cannot work out must not come back as today's date — that is the
+// same silent wrong answer #388 was about, one step further out.
+func TestReplySystemUnknownDayIsHonest(t *testing.T) {
+	now := time.Date(2026, 7, 30, 14, 5, 0, 0, time.UTC)
+	h := systemHandler(now)
+	for _, u := range []string{
+		"какое число в пятницу",
+		"какое число через неделю",
+		"какое число в понедельник",
+	} {
+		got := h.replySystem(context.Background(), router.Decision{Utterance: u})
+		if got != onlyNearDaysReply {
+			t.Errorf("replySystem(%q) = %q, want the honest reply", u, got)
+		}
+	}
+	// The days she does know must not be caught by the same guard.
+	if got := h.replySystem(context.Background(), router.Decision{Utterance: "какое число завтра"}); got == onlyNearDaysReply {
+		t.Error("завтра was treated as an unknown day")
+	}
+}
+
+// TestReplySystemClockCity — the clock arm must not answer local time for a
+// question about another city (Vikunja #388). She keeps one clock, so every
+// named place gets the honest "local time only" answer.
+func TestReplySystemClockCity(t *testing.T) {
+	now := time.Date(2026, 7, 30, 12, 0, 0, 0, time.UTC)
+	h := systemHandler(now)
+	cases := []struct{ utterance, want string }{
+		{"который час", "сейчас 12 часов ровно"},
+		{"который час в киеве", onlyLocalTimeReply},
+		{"сколько времени в москве", onlyLocalTimeReply},
+		{"который час в лондоне", onlyLocalTimeReply},
+		{"который час в бишкеке", onlyLocalTimeReply},
+	}
+	for _, c := range cases {
+		got := h.replySystem(context.Background(), router.Decision{Utterance: c.utterance})
+		if got != c.want {
+			t.Errorf("replySystem(%q) = %q, want %q", c.utterance, got, c.want)
+		}
+	}
+}

cmd/mavend/voice.go

@@ -752,7 +752,9 @@ func (h *reactiveHandler) applyAction(ctx context.Context, dec router.Decision)
 		}
 
 		// Calendar questions: "что у меня сегодня?", "планы на завтра?"
-		if date, ok := router.ParseCalendarDate(dec.Utterance, time.Now()); ok {
+		// h.now(), not time.Now(): the handler's clock is the injected one, so
+		// this arm can be tested at a fixed time like the rest.
+		if date, ok := router.ParseCalendarDate(dec.Utterance, h.now()); ok {
 			events, err := h.api.CalendarEvents(ctx, date, date.Add(24*time.Hour))
 			if err != nil {
 				log.Printf("voice: calendar events: %v", err)
@@ -936,6 +938,101 @@ var ruMonths = []string{
 	"июля", "августа", "сентября", "октября", "ноября", "декабря",
 }
 
+// onlyLocalTimeReply — the honest answer when the user asks the time somewhere
+// other than here. She only keeps one clock, and saying so is better than
+// naming the wrong city's time.
+//
+// There used to be a city→time-zone table here. It was removed on purpose: the
+// user only ever asks for local time, so the table was a second list of cities
+// to keep in step with the weather one for no gain.
+const onlyLocalTimeReply = "я знаю только местное время, про другие города пока не скажу."
+
+// notPlaceAfterV — words that follow "в" without naming a place, so
+// mentionsUnknownPlace does not mistake them for a city.
+var notPlaceAfterV = map[string]bool{
+	"данный": true, "данную": true, "этот": true, "эту": true,
+	"котором": true, "какое": true, "какой": true, "который": true,
+	"общем": true, "точности": true, "курсе": true, "сутках": true,
+	"часах": true, "минутах": true, "секундах": true, "неделе": true,
+}
+
+// mentionsUnknownPlace reports whether the question has a "в <слово>" phrase
+// that looks like a place we do not know ("который час в киеве"). Used only to
+// pick the honest "local time only" reply instead of answering local time as
+// if it were the city's.
+func mentionsUnknownPlace(u string) bool {
+	toks := strings.Fields(u)
+	for i := 0; i+1 < len(toks); i++ {
+		if toks[i] != "в" && toks[i] != "во" {
+			continue
+		}
+		next := strings.Trim(toks[i+1], ".,?!")
+		if next == "" || notPlaceAfterV[next] {
+			continue
+		}
+		// A number after "в" is a clock ("в 5 часов"), not a place.
+		if _, err := strconv.Atoi(strings.SplitN(next, ":", 2)[0]); err == nil {
+			continue
+		}
+		return true
+	}
+	return false
+}
+
+// onlyNearDaysReply — she can work out today, tomorrow, the day after and
+// yesterday, and nothing further. Said out loud instead of answering today's
+// date for a day she did not understand.
+const onlyNearDaysReply = "я считаю только сегодня, завтра, послезавтра и вчера — про другие дни пока не скажу."
+
+// dayWords — day references the calendar parser cannot resolve. A weekday name
+// or a "через …" phrase means he asked about a specific other day.
+var dayWords = []string{
+	"понедельник", "вторник", "сред", "четверг", "пятниц", "суббот", "воскресен",
+	"через", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday",
+}
+
+// mentionsUnknownDay reports whether the question names a day the calendar
+// parser could not resolve. Mirror of mentionsUnknownPlace: it exists only to
+// pick an honest reply over a confidently wrong one.
+//
+// Only called after ParseCalendarDate has already failed, so "завтра" and the
+// other words it does know never reach here.
+func mentionsUnknownDay(u string) bool {
+	for _, w := range dayWords {
+		if strings.Contains(u, w) {
+			return true
+		}
+	}
+	return false
+}
+
+// ruClock renders the clock part of the time reply: "15 часов 4 минуты".
+func ruClock(t time.Time) string {
+	h, m := t.Hour(), t.Minute()
+	hourWord := ruPlural(h, "час", "часа", "часов")
+	if m == 0 {
+		return fmt.Sprintf("%d %s ровно", h, hourWord)
+	}
+	return fmt.Sprintf("%d %s %d %s", h, hourWord, m, ruPlural(m, "минута", "минуты", "минут"))
+}
+
+// dayPrefix names the day relative to now ("завтра", "вчера", …) so the date
+// reply opens the way a person would say it.
+func dayPrefix(now, day time.Time) string {
+	base := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
+	switch int(day.Sub(base).Hours() / 24) {
+	case -1:
+		return "вчера"
+	case 0:
+		return "сегодня"
+	case 1:
+		return "завтра"
+	case 2:
+		return "послезавтра"
+	}
+	return "это"
+}
+
 func ruPlural(n int, one, two, many string) string {
 	n = n % 100
 	if n > 10 && n < 20 {
@@ -1014,18 +1111,29 @@ func (h *reactiveHandler) replySystem(ctx context.Context, dec router.Decision)
 
 	switch {
 	case strings.Contains(u, "час") || strings.Contains(u, "врем"):
-		h := now.Hour()
-		m := now.Minute()
-		hourWord := ruPlural(h, "час", "часа", "часов")
-		if m == 0 {
-			return fmt.Sprintf("сейчас %d %s ровно", h, hourWord)
+		// "который час в киеве" — she keeps one clock, so any named place gets
+		// the honest answer. Never local time dressed up as the city's.
+		if mentionsUnknownPlace(u) {
+			return onlyLocalTimeReply
 		}
-		minWord := ruPlural(m, "минута", "минуты", "минут")
-		return fmt.Sprintf("сейчас %d %s %d %s", h, hourWord, m, minWord)
+		return "сейчас " + ruClock(now)
 	case strings.Contains(u, "день") || strings.Contains(u, "числ"):
-		dow := ruWeekdays[now.Weekday()]
-		month := ruMonths[now.Month()-1]
-		return fmt.Sprintf("сегодня %s, %d %s %d года", dow, now.Day(), month, now.Year())
+		// "какое число завтра" — answer for the day the user asked about,
+		// not today. Reuses the router's calendar day-word parser.
+		day := now
+		prefix := "сегодня"
+		if d, ok := router.ParseCalendarDate(u, now); ok {
+			day = d
+			prefix = dayPrefix(now, d)
+		} else if mentionsUnknownDay(u) {
+			// He named a day she cannot work out ("в пятницу", "через неделю").
+			// Answering today's date here would be the same silent wrong answer
+			// this arm was fixed for, so say what she can do instead.
+			return onlyNearDaysReply
+		}
+		dow := ruWeekdays[day.Weekday()]
+		month := ruMonths[day.Month()-1]
+		return fmt.Sprintf("%s %s, %d %s %d года", prefix, dow, day.Day(), month, day.Year())
 	case strings.Contains(u, "кто дома") || strings.Contains(u, "человек дома"):
 		return "присутствие пока не подключено к голосовому запросу."
 	case strings.Contains(u, "памят") || strings.Contains(u, "процессор") || strings.Contains(u, "загрузк") || strings.Contains(u, "статус") || strings.Contains(u, "работа") || strings.Contains(u, "сервис") || strings.Contains(u, "диск") || strings.Contains(u, "ip") || strings.Contains(u, "аптайм") || strings.Contains(u, "трафик") || strings.Contains(u, "интернет"):

internal/phraser/eval/address_time_test.go

@@ -0,0 +1,26 @@
+package eval
+
+import "testing"
+
+func TestAddressTimeWordDoesNotBlind(t *testing.T) {
+	// A nudge that opens with a time word must still be caught. Without the
+	// time words in the stoplist, "сегодня" was read as the third party.
+	for _, s := range []string{
+		"сегодня он не ел 11 дней",
+		"вчера он не пил воду",
+		"опять он забыл про таблетки",
+	} {
+		if r := checkAddress(s); r.Pass {
+			t.Errorf("checkAddress(%q) passed, want a third-person failure", s)
+		}
+	}
+	// Still must not fire when a third party really is named.
+	for _, s := range []string{
+		"сегодня сервис упал, он не отвечает",
+		"ты не пил воду четыре часа",
+	} {
+		if r := checkAddress(s); !r.Pass {
+			t.Errorf("checkAddress(%q) failed: %s", s, r.Detail)
+		}
+	}
+}

internal/phraser/eval/checks.go

@@ -21,10 +21,14 @@ const (
 	// CheckHisGender — the other half of the persona rule: SHE is feminine, HE
 	// is male. "ты давно не отдыхала" addresses the operator as a woman.
 	CheckHisGender = "hisgender"
+
+	// CheckAddress — she talks TO him, informally, one to one. Not "вы", not
+	// "он". See the comment block above checkAddress.
+	CheckAddress = "address"
 )
 
 // CheckNames — report order.
-var CheckNames = []string{CheckMood, CheckLang, CheckLength, CheckFeminine, CheckHisGender, CheckCringe, CheckOnTopic}
+var CheckNames = []string{CheckMood, CheckLang, CheckLength, CheckFeminine, CheckHisGender, CheckAddress, CheckCringe, CheckOnTopic}
 
 // Result — one check on one message.
 type Result struct {
@@ -57,6 +61,7 @@ func RunChecks(c Case, body, mood string) []Result {
 		checkLength(body),
 		checkFeminine(body),
 		checkHisGender(body),
+		checkAddress(body),
 		checkCringe(body),
 		checkOnTopic(c, body),
 	}
@@ -302,6 +307,159 @@ func prevWord(words []string, i int) string {
 	return ""
 }
 
+// --- how she addresses him ------------------------------------------------
+//
+// Persona hard constraint: Maven speaks TO him, informally, one to one. The
+// phrasing eval produced two breaks of it, and both scored clean:
+//
+//   - "Приходите… Жду вас" — the formal plural. Correct is ты/тебя/тебе and a
+//     singular imperative ("приходи", "жду тебя").
+//   - "Он не ел 11 дней" — she talks ABOUT him, in the third person, as if
+//     reporting to somebody else. Correct is "ты не ел 11 дней".
+//
+// Like checkHisGender this is a keyword + suffix heuristic, NOT a parser. Every
+// hit prints the word it tripped on, so a false alarm is obvious at a glance and
+// can be dismissed.
+//
+// Part 1, formal address. Two signals:
+//   - the "вы" pronoun family, matched as whole words, so there is nothing to
+//     exclude — "вы" and "вас" are never anything else.
+//   - a plural verb ending: -ите/-ете/-йте/-ьте ("приходите", "выпейте",
+//     "не забудьте", "хотите"). Nouns in the prepositional case share those
+//     endings ("в интернете", "в свете"), so a word right after a preposition is
+//     skipped. That is the whole exclusion list, on purpose: a bigger one would
+//     start swallowing real imperatives.
+//
+// Part 2, third person. "он" is perfectly fine when the message really is about
+// somebody or something else ("сервис упал, он не отвечает"). The way to tell
+// them apart: a legitimate third person has an ANTECEDENT — the thing it refers
+// to was named earlier in the message. So "он" is only flagged when nothing
+// before it in the message could be that thing.
+//
+// Where this gives up, plainly:
+//   - it only looks BACKWARD. "Он не отвечает, сервис упал" names the subject
+//     after the pronoun and is flagged wrongly.
+//   - any noun earlier in the message counts as an antecedent, even when it is
+//     not one ("после обеда он не ел" reads as legitimate and is missed). The
+//     common time words are stoplisted so the usual nudge opening does not
+//     blind it, but a message with any other noun in front still slips through.
+//     This is the check's real hole; widening it further would start flagging
+//     legitimate third-party messages, so it stops here.
+//   - a message that opens with "ты" and only later slips into "он" is missed,
+//     because "ты" itself is skipped but the words around it are not.
+//   - formal address outside these endings (short adjectives, "вашими" style
+//     forms not listed) is missed.
+
+// addressWordRE also takes Latin words, because "him"/"he" is the same break in
+// English.
+var addressWordRE = regexp.MustCompile(`[\p{Cyrillic}]+|[a-zA-Z]+|[,.;:!?…—-]`)
+
+// formalPronouns — the "вы" family. Whole-word match, so no false hits.
+var formalPronouns = map[string]bool{
+	"вы": true, "вас": true, "вам": true, "вами": true,
+	"ваш": true, "ваша": true, "ваше": true, "ваши": true,
+	"вашего": true, "вашей": true, "вашему": true, "вашим": true,
+	"вашими": true, "вашу": true,
+}
+
+// prepositions — used twice: to skip prepositional-case nouns that look like
+// plural verbs, and as words that cannot be what "он" refers to.
+var prepositions = map[string]bool{
+	"в": true, "во": true, "на": true, "о": true, "об": true, "обо": true,
+	"при": true, "по": true, "за": true, "из": true, "с": true, "со": true,
+	"к": true, "ко": true, "до": true, "от": true, "у": true, "над": true,
+	"под": true, "про": true, "без": true, "для": true, "через": true,
+}
+
+// pluralVerb reports whether a word looks like a plural/formal verb form:
+// "приходите", "выпейте", "забудьте", "хотите".
+func pluralVerb(w string) bool {
+	if len([]rune(w)) < 5 {
+		return false
+	}
+	return strings.HasSuffix(w, "ите") || strings.HasSuffix(w, "ете") ||
+		strings.HasSuffix(w, "йте") || strings.HasSuffix(w, "ьте")
+}
+
+// thirdPersonHim — pronouns that would be talking about him instead of to him.
+var thirdPersonHim = map[string]bool{
+	"он": true, "его": true, "ему": true, "него": true, "нему": true, "ним": true,
+	"he": true, "him": true, "his": true,
+}
+
+// notAnAntecedent — words that cannot be the thing "он" refers to: pronouns,
+// particles, conjunctions, adverbs of time. If only these come before "он", the
+// message never named a third party and "он" is him.
+var notAnAntecedent = map[string]bool{
+	"не": true, "ни": true, "и": true, "а": true, "но": true, "да": true,
+	"же": true, "бы": true, "ли": true, "вот": true, "уже": true,
+	"ещё": true, "еще": true, "тоже": true, "там": true, "тут": true,
+	"здесь": true, "это": true, "что": true, "как": true, "когда": true,
+	"чтобы": true, "потому": true, "сейчас": true, "потом": true,
+	// Time words. A nudge almost always opens with one ("сегодня он не ел"),
+	// and without them the very next word is read as the person being talked
+	// about, so the check misses the exact break it was written for.
+	"сегодня": true, "вчера": true, "завтра": true, "послезавтра": true,
+	"утром": true, "днём": true, "днем": true, "вечером": true, "ночью": true,
+	"опять": true, "снова": true, "весь": true, "всю": true, "целый": true,
+	"я": true, "мне": true, "меня": true, "мной": true, "мы": true, "нас": true,
+	"ты": true, "тебя": true, "тебе": true, "тобой": true,
+	"твой": true, "твоя": true, "твоё": true, "твое": true, "твои": true, "твою": true,
+}
+
+// looksPastVerb — a past-tense verb needs a subject of its own, so it is not an
+// antecedent either. Keeps "сервис упал, он не отвечает" working off "сервис".
+func looksPastVerb(w string) bool {
+	if len([]rune(w)) < 3 {
+		return false
+	}
+	return strings.HasSuffix(w, "л") || strings.HasSuffix(w, "ла") ||
+		strings.HasSuffix(w, "ло") || strings.HasSuffix(w, "ли")
+}
+
+func checkAddress(body string) Result {
+	words := addressWordRE.FindAllString(strings.ToLower(body), -1)
+
+	for i, w := range words {
+		if formalPronouns[w] {
+			return Result{CheckAddress, false,
+				fmt.Sprintf("formal %q — she says ты/тебя/тебе", w)}
+		}
+		if pluralVerb(w) && !(i > 0 && prepositions[words[i-1]]) {
+			return Result{CheckAddress, false,
+				fmt.Sprintf("plural imperative %q — she uses the singular", w)}
+		}
+	}
+
+	for i, w := range words {
+		if !thirdPersonHim[w] {
+			continue
+		}
+		named := false
+		for j := 0; j < i; j++ {
+			p := words[j]
+			if !unicode.Is(unicode.Cyrillic, []rune(p)[0]) && !isLatinWord(p) {
+				continue // punctuation
+			}
+			if notAnAntecedent[p] || prepositions[p] || thirdPersonHim[p] || looksPastVerb(p) {
+				continue
+			}
+			named = true
+			break
+		}
+		if !named {
+			return Result{CheckAddress, false,
+				fmt.Sprintf("third person %q with nobody else named — she talks to him, not about him", w)}
+		}
+	}
+	return Result{CheckAddress, true, ""}
+}
+
+func isLatinWord(w string) bool {
+	r := []rune(w)[0]
+	return (r >= 'a' && r <= 'z') || (r >= 'A' && r <= 'Z')
+}
+
 // --- the cringe checks ---------------------------------------------------
 //
 // "Think Jarvis without the cringe part". DESIGN.md § Non-goals: "Not a

internal/phraser/eval/eval_test.go

@@ -75,6 +75,7 @@ func TestStubBaseline(t *testing.T) {
 		CheckLength:    12,
 		CheckFeminine:  15,
 		CheckHisGender: 15,
+		CheckAddress:   15,
 		CheckCringe:    15,
 		CheckOnTopic:   12,
 	}
@@ -123,6 +124,10 @@ func TestChecksCatchWhatTheyClaim(t *testing.T) {
 		{"asks how he feels", "как ты себя чувствуешь? попей воды.", CheckCringe},
 		{"praise", "молодец! теперь попей воды.", CheckCringe},
 		{"off topic", "пора бы уже что-то сделать.", CheckOnTopic},
+		// The two recorded persona breaks from the phrasing eval run. Pinned as
+		// unit tests because an eval run is sampled and may not reproduce them.
+		{"formal plural", "Приходите… Жду вас", CheckAddress},
+		{"third person about him", "Он не ел 11 дней", CheckAddress},
 	}
 
 	for _, tc := range cases {
@@ -144,6 +149,36 @@ func TestChecksCatchWhatTheyClaim(t *testing.T) {
 	}
 }
 
+// TestAddressCheck — the address check on its own, so the messages that must NOT
+// trip it can be written without also having to satisfy the on-topic check.
+func TestAddressCheck(t *testing.T) {
+	bad := []string{
+		"Приходите… Жду вас",        // the recorded formal-plural break
+		"Он не ел 11 дней",          // the recorded third-person break
+		"Выпейте воды, пожалуйста.", // plural imperative on its own
+		"Ваш обед был давно.",       // formal possessive
+	}
+	for _, body := range bad {
+		if r := checkAddress(body); r.Pass {
+			t.Errorf("persona break not caught: %q", body)
+		} else {
+			t.Logf("%q -> %s", body, r.Detail)
+		}
+	}
+
+	good := []string{
+		"ты не пил воду четыре часа — попей.",   // correct informal address
+		"сервис netdata упал, он не отвечает.",  // legitimately about a third party
+		"я заметила, что зарядка была утром.",   // no address at all
+		"в интернете опять тихо, всё работает.", // "интернете" is a noun, not an imperative
+	}
+	for _, body := range good {
+		if r := checkAddress(body); !r.Pass {
+			t.Errorf("clean message flagged: %q -> %s", body, r.Detail)
+		}
+	}
+}
+
 func TestMoodCheckUsesTheEnum(t *testing.T) {
 	if r := checkMood("cheerful"); r.Pass {
 		t.Error("mood outside the enum passed")

internal/router/slots.go

@@ -449,16 +449,30 @@ func (AnaphoraResolver) Resolve(text string) (ref string, ok bool) {
 	return "", false
 }
 
-// ParseCalendarDate detects RU calendar date words in text and returns the
-// resolved time (midnight UTC+0 for "сегодня"/"today", next day for "завтра"/"tomorrow").
-// Returns zero time + false if no match.
+// ParseCalendarDate detects RU/EN calendar day words in text and returns
+// midnight of that day in now's own time zone. Handles "сегодня", "завтра",
+// "послезавтра", "вчера" (and the English words). Returns zero time + false
+// if no match.
+//
+// "послезавтра" is checked before "завтра" because it contains it.
 func ParseCalendarDate(text string, now time.Time) (time.Time, bool) {
 	lower := strings.ToLower(text)
-	if strings.Contains(lower, "сегодня") || strings.Contains(lower, "today") {
-		return now.Truncate(24 * time.Hour), true
-	}
-	if strings.Contains(lower, "завтра") || strings.Contains(lower, "tomorrow") {
-		return now.Truncate(24 * time.Hour).Add(24 * time.Hour), true
+	switch {
+	case strings.Contains(lower, "сегодня") || strings.Contains(lower, "today"):
+		return midnight(now, 0), true
+	case strings.Contains(lower, "послезавтра") || strings.Contains(lower, "day after tomorrow"):
+		return midnight(now, 2), true
+	case strings.Contains(lower, "завтра") || strings.Contains(lower, "tomorrow"):
+		return midnight(now, 1), true
+	case strings.Contains(lower, "вчера") || strings.Contains(lower, "yesterday"):
+		return midnight(now, -1), true
 	}
 	return time.Time{}, false
 }
+
+// midnight returns the start of the day that is `days` away from now, in
+// now's time zone (now.Truncate(24h) would cut on a UTC boundary instead).
+func midnight(now time.Time, days int) time.Time {
+	y, m, d := now.AddDate(0, 0, days).Date()
+	return time.Date(y, m, d, 0, 0, 0, 0, now.Location())
+}

internal/router/slots_ru_test.go

@@ -45,6 +45,9 @@ func TestParseCalendarDate(t *testing.T) {
 		{"расписание на завтра", time.Date(2026, 7, 7, 0, 0, 0, 0, time.UTC), true},
 		{"what's today", time.Date(2026, 7, 6, 0, 0, 0, 0, time.UTC), true},
 		{"tomorrow plans", time.Date(2026, 7, 7, 0, 0, 0, 0, time.UTC), true},
+		{"какое число послезавтра", time.Date(2026, 7, 8, 0, 0, 0, 0, time.UTC), true},
+		{"что было вчера", time.Date(2026, 7, 5, 0, 0, 0, 0, time.UTC), true},
+		{"yesterday plans", time.Date(2026, 7, 5, 0, 0, 0, 0, time.UTC), true},
 		{"какая погода", time.Time{}, false},
 		{"сколько времени", time.Time{}, false},
 		{"", time.Time{}, false},