morning, tasks, memory: say the summaries from the file (V-506)

The three callers now read their sentences out of summary_ru_v1.json: the
plan lines in morning.Plan.FormatRU, the list and reason words in
tasks.FormatRU, and the habit readouts in memory.Profile.

Two behaviour_test assertions moved from substring to say.IsS, because the
habit gaps have variants now and a substring pins one of them. The
"по {day} у тебя обычно" variant was dropped on sight: the activities are
verbs, so it read "у тебя обычно тренируешься".

The persona scorer covers the family, and a new test asserts every gap
variant still says she has not seen enough rather than that he has nothing.

internal/memory/behavior.go

@@ -3,8 +3,11 @@ package memory
 import (
 	"fmt"
 	"sort"
+	"strconv"
 	"strings"
 	"time"
+
+	"github.com/kami/maven/internal/say"
 )
 
 // Behavioural memory — "what do I usually do?" (Vikunja #254).
@@ -337,13 +340,14 @@ func (p Profile) FormatWeekdayRU(wd time.Weekday) string {
 	day := weekdayRU[int(wd)%7]
 	acts := p.Weekly[wd]
 	if len(acts) > 0 {
-		return fmt.Sprintf("по %s ты обычно %s.", day, joinActivities(acts))
+		return say.S(say.HabitWeekday, map[string]string{"day": day, "items": joinActivities(acts)})
 	}
 	if len(p.Everyday) > 0 {
-		return fmt.Sprintf("по %s у тебя нет ничего особенного — то же, что и в остальные дни: %s.",
-			day, joinActivities(p.Everyday))
+		return say.S(say.HabitWeekdaySame, map[string]string{
+			"day": day, "items": joinActivities(p.Everyday),
+		})
 	}
-	return fmt.Sprintf("по %s я пока не вижу у тебя ничего постоянного.", day)
+	return say.S(say.HabitWeekdayNone, map[string]string{"day": day})
 }
 
 // FormatWeekendRU reads back what distinguishes Saturday and Sunday.
@@ -355,19 +359,17 @@ func (p Profile) FormatWeekendRU() string {
 	sat, sun := p.Weekly[time.Saturday], p.Weekly[time.Sunday]
 	switch {
 	case len(sat) > 0 && len(sun) > 0:
-		return fmt.Sprintf("по субботам ты обычно %s, по воскресеньям — %s.",
-			joinActivities(sat), joinActivities(sun))
+		return say.S(say.HabitWeekendBoth, map[string]string{
+			"sat": joinActivities(sat), "sun": joinActivities(sun),
+		})
 	case len(sat) > 0:
-		return fmt.Sprintf("по субботам ты обычно %s, а по воскресеньям ничего постоянного.",
-			joinActivities(sat))
+		return say.S(say.HabitWeekendSat, map[string]string{"items": joinActivities(sat)})
 	case len(sun) > 0:
-		return fmt.Sprintf("по воскресеньям ты обычно %s, а по субботам ничего постоянного.",
-			joinActivities(sun))
+		return say.S(say.HabitWeekendSun, map[string]string{"items": joinActivities(sun)})
 	case len(p.Everyday) > 0:
-		return fmt.Sprintf("по выходным у тебя нет ничего особенного — то же, что и в остальные дни: %s.",
-			joinActivities(p.Everyday))
+		return say.S(say.HabitWeekendSame, map[string]string{"items": joinActivities(p.Everyday)})
 	}
-	return "по выходным я пока не вижу у тебя ничего постоянного."
+	return say.S(say.HabitWeekendNone, nil)
 }
 
 // FormatOverallRU reads back the habits that hold across the whole week, and
@@ -378,19 +380,23 @@ func (p Profile) FormatWeekendRU() string {
 // a year of them, and only one of those is worth believing.
 func (p Profile) FormatOverallRU() string {
 	if len(p.All) == 0 {
-		return "я ещё не набрала достаточно записей, чтобы говорить о привычках."
+		return say.S(say.HabitOverallNone, nil)
 	}
-	return fmt.Sprintf("обычно ты %s — %s.", joinActivities(p.All), p.spanRU())
+	return say.S(say.HabitOverall, map[string]string{
+		"items": joinActivities(p.All), "span": p.spanRU(),
+	})
 }
 
 // spanRU — "по записям за последние N дней", or a vaguer phrase when the window
 // is too short to name in days.
 func (p Profile) spanRU() string {
 	if p.Since.IsZero() || !p.Until.After(p.Since) {
-		return "по записям за сегодня"
+		return say.S(say.HabitSpanToday, nil)
 	}
 	days := int(p.Until.Sub(p.Since).Hours()/24) + 1
-	return fmt.Sprintf("по записям за последние %d %s", days, pluralDaysRU(days))
+	return say.S(say.HabitSpanDays, map[string]string{
+		"n": strconv.Itoa(days), "word": pluralDaysRU(days),
+	})
 }
 
 // pluralDaysRU — the Russian count form of "день" for n.
@@ -423,14 +429,18 @@ func joinActivities(acts []Activity) string {
 			// come from the model, so an unglossed one is as likely to be
 			// "выпил_воды" as a noun, and "обычно ты выпил_воды около 09:00" is
 			// not a sentence.
-			gloss = fmt.Sprintf("отмечаешь «%s»", strings.ReplaceAll(a.Key, "_", " "))
+			gloss = say.S(say.HabitUnglossed, map[string]string{
+				"key": strings.ReplaceAll(a.Key, "_", " "),
+			})
 		}
 		if !a.HasTypical {
 			parts[i] = gloss
 			continue
 		}
-		parts[i] = fmt.Sprintf("%s около %02d:%02d", gloss,
-			int(a.TypicalAt.Hours()), int(a.TypicalAt.Minutes())%60)
+		parts[i] = say.S(say.HabitAt, map[string]string{
+			"gloss": gloss,
+			"time":  fmt.Sprintf("%02d:%02d", int(a.TypicalAt.Hours()), int(a.TypicalAt.Minutes())%60),
+		})
 	}
 	if len(parts) == 1 {
 		return parts[0]