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_test.go

@@ -5,6 +5,8 @@ import (
 	"testing"
 	"time"
 	"unicode"
+
+	"github.com/kami/maven/internal/say"
 )
 
 // habitHistory — n weeks of the same weekday, at the given local time.
@@ -70,7 +72,7 @@ func TestBuildProfileNeedsMoreThanOneDay(t *testing.T) {
 	if len(p.All) != 0 || len(p.Weekly) != 0 {
 		t.Fatalf("one day of rows must produce no habit: %+v / %+v", p.All, p.Weekly)
 	}
-	if got := p.FormatOverallRU(); !strings.Contains(got, "не набрала достаточно") {
+	if got := p.FormatOverallRU(); !say.IsS(say.HabitOverallNone, nil, got) {
 		t.Errorf("empty profile reads %q", got)
 	}
 }
@@ -203,7 +205,9 @@ func TestWeekdayProfileExcludesEverydayHabits(t *testing.T) {
 	// A day with nothing of its own says so rather than reciting water as if
 	// Wednesday were the reason for it.
 	wed := p.FormatWeekdayRU(time.Wednesday)
-	if !strings.Contains(wed, "ничего особенного") || !strings.Contains(wed, "воду") {
+	if !say.IsS(say.HabitWeekdaySame, map[string]string{
+		"day": "средам", "items": "пьёшь воду около 13:30",
+	}, wed) {
 		t.Fatalf("plain weekday readout should say the day is unremarkable and name the daily habits: %q", wed)
 	}
 }