fix: derive /break timing table from the actual lesson schedule

The old SCHEDULE dict was hand-written for a previous timetable and
never got updated when LESSON_SCHEDULE changed, so Wednesday (day=2)
was left empty ("Сегодня кайфуем дома, перекур не нужен") even though
the new schedule has 4 lessons that day. SCHEDULE is now generated
from the pairs actually present in _LESSON_WEEK plus PAIR_TIMES, so it
can't drift out of sync again.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

config.py

@@ -131,46 +131,45 @@ LESSON_SCHEDULE = {
     "lower": _LESSON_WEEK,
 }
 
+# SCHEDULE — тайминг перекуров для /break, построен из фактических пар в
+# _LESSON_WEEK, а не задаётся руками, чтобы не рассинхронизироваться при
+# правках расписания (раньше здесь была отдельная захардкоженная таблица,
+# которая не обновилась вместе с LESSON_SCHEDULE и врала на днях с занятиями).
+# Каждая пара (95 мин) состоит из двух академ. часов по 45 мин с 5-минутным
+# перекуром между ними; между парами перекур — фактический зазор по PAIR_TIMES.
+def _time_to_minutes(t: time) -> int:
+    return t.hour * 60 + t.minute
+
+
+def _minutes_to_time(m: int) -> time:
+    return make_time(m // 60, m % 60)
+
+
+def _build_day_schedule(pairs: list[int]) -> list[tuple[time, time, int | None]]:
+    entries = []
+    for idx, pair in enumerate(pairs):
+        start_t, end_t = PAIR_TIMES[pair]
+        start_m = _time_to_minutes(start_t)
+        end_m = _time_to_minutes(end_t)
+        mid_m = start_m + 45
+        second_start_m = mid_m + 5
+        entries.append((start_t, _minutes_to_time(mid_m), 5))
+        if idx == len(pairs) - 1:
+            entries.append((_minutes_to_time(second_start_m), end_t, None))
+        else:
+            next_start_t, _ = PAIR_TIMES[pairs[idx + 1]]
+            gap = _time_to_minutes(next_start_t) - end_m
+            entries.append((_minutes_to_time(second_start_m), end_t, gap))
+    return entries
+
+
+def _pairs_for_day(day_lessons: list[dict]) -> list[int]:
+    return sorted({item["pair"] for item in day_lessons if item.get("pair") is not None})
+
+
 SCHEDULE = {
-    0: [ # Понедельник
+    day: _build_day_schedule(_pairs_for_day(lessons))
-        (make_time(9, 50), make_time(10, 35), 5),
+    for day, lessons in _LESSON_WEEK.items()
-        (make_time(10, 40), make_time(11, 25), 30),
-        (make_time(11, 55), make_time(12, 40), 5),
-        (make_time(12, 45), make_time(13, 30), 15),
-        (make_time(13, 45), make_time(14, 30), 5),
-        (make_time(14, 35), make_time(15, 20), 30),
-        (make_time(15, 50), make_time(16, 35), 5),
-        (make_time(16, 40), make_time(17, 25), None),
-    ],
-    1: [ # Вторник
-        (make_time(9, 50), make_time(10, 35), 5),
-        (make_time(10, 40), make_time(11, 25), 30),
-        (make_time(11, 55), make_time(12, 40), 5),
-        (make_time(12, 45), make_time(13, 30), 15),
-        (make_time(13, 45), make_time(14, 30), 5),
-        (make_time(14, 35), make_time(15, 20), None),
-    ],
-    2: [], # Среда
-    3: [ # Четверг
-        (make_time(8, 0), make_time(8, 45), 5),
-        (make_time(8, 50), make_time(9, 35), 15),
-        (make_time(9, 50), make_time(10, 35), 5),
-        (make_time(10, 40), make_time(11, 25), 30),
-        (make_time(11, 55), make_time(12, 40), 5),
-        (make_time(12, 45), make_time(13, 30), 15),
-        (make_time(13, 45), make_time(14, 30), 5),
-        (make_time(14, 35), make_time(15, 20), 30),
-        (make_time(15, 50), make_time(16, 35), 5),
-        (make_time(16, 40), make_time(17, 25), None),
-    ],
-    4: [ # Пятница
-        (make_time(9, 50), make_time(10, 35), 5),
-        (make_time(10, 40), make_time(11, 25), 30),
-        (make_time(11, 55), make_time(12, 40), 5),
-        (make_time(12, 45), make_time(13, 30), 15),
-        (make_time(13, 45), make_time(14, 30), 5),
-        (make_time(14, 35), make_time(15, 20), None),
-    ],
 }
 
 # --- Остальное ---