feat(schedule): per-user class picker, parser fixes

- fix parser: capture tr attrs via finditer, strip HTML comments before
  cell parse (was leaving '-->' in subject names)
- store class choice in redis: user:{id}:schedule_class (private) and
  chat:{id}:schedule_class (groups, admin-only via /setclass)
- /schedule renders day for stored class, /setclass sets it directly
- drop teacher emoji, format grade as "N клас"

edu_master/webinar-checker/checker.py

@@ -518,11 +518,28 @@ def get_schedule_class_keyboard(classes: list):
     return InlineKeyboardMarkup(rows)
 
 
+def _get_chat_class(chat, user_id) -> str | None:
+    """Get stored schedule class for a private user or a group chat."""
+    if chat.type == 'private':
+        return redis_client.get(f'user:{user_id}:schedule_class')
+    return redis_client.get(f'chat:{chat.id}:schedule_class')
+
+
+def _set_chat_class(chat, user_id, class_num) -> None:
+    """Save schedule class for a private user or a group chat."""
+    if chat.type == 'private':
+        redis_client.set(f'user:{user_id}:schedule_class', str(class_num))
+    else:
+        redis_client.set(f'chat:{chat.id}:schedule_class', str(class_num))
+
+
 def _parse_schedule_cell(cell_html: str) -> list:
     """Parse a single schedule cell, returning list of {subject, note, teacher}."""
     lessons = []
     parts = re.split(r'<hr\s*/?>', cell_html, flags=re.IGNORECASE)
     for part in parts:
+        part = re.sub(r'<!--.*?-->', '', part, flags=re.DOTALL)
+        part = re.sub(r'<!--', '', part)
         text = re.sub(r'<[^>]+>', '\n', part)
         text = re.sub(r'&nbsp;', ' ', text)
         text = text.strip()
@@ -546,16 +563,15 @@ def _parse_schedule_cell(cell_html: str) -> list:
 def _parse_schedule_html(table_html: str) -> dict:
     """Parse schedule HTML table into {classes: [...], weekdays: {day: [...]}}."""
     result = {'classes': [], 'weekdays': {}}
-    rows = re.findall(r'<tr[^>]*>(.*?)</tr>', table_html, re.DOTALL)
+    row_matches = re.finditer(r'<tr([^>]*)>(.*?)</tr>', table_html, re.DOTALL)
 
     current_day = None
     classes_header = []
 
-    for row in rows:
-        row_classes_match = re.search(r'class="([^"]*)"', row)
-        row_classes = row_classes_match.group(1) if row_classes_match else ''
+    for match in row_matches:
+        tr_attrs, row = match.group(1), match.group(2)
 
-        if 'first-row' in row_classes:
+        if 'first-row' in tr_attrs:
             cells = re.findall(r'<td[^>]*>(.*?)</td>', row, re.DOTALL)
             if cells:
                 day_text = re.sub(r'<[^>]+>', '', cells[0]).strip()
@@ -572,7 +588,7 @@ def _parse_schedule_html(table_html: str) -> dict:
                 result['classes'] = classes_header
             continue
 
-        if 'second-row' in row_classes:
+        if 'second-row' in tr_attrs:
             continue
 
         if current_day is None:
@@ -670,8 +686,11 @@ async def _get_schedule_data(context: ContextTypes.DEFAULT_TYPE) -> dict | None:
 def format_schedule_day(data: dict, weekday: str, class_num) -> str:
     days = data.get('weekdays', {})
     entries = days.get(weekday, [])
-    class_str = str(class_num)
-    lines = [f'📅 <b>{weekday} — Клас {class_num}</b>', '─' * 20]
+    try:
+        class_key = int(class_num)
+    except (TypeError, ValueError):
+        class_key = class_num
+    lines = [f'📅 <b>{weekday} — {class_num} клас</b>', '─' * 20]
 
     if not entries:
         lines.append('Немає уроків')
@@ -680,7 +699,7 @@ def format_schedule_day(data: dict, weekday: str, class_num) -> str:
             time_str = entry.get('time', '').replace(' ', '–')
             lines.append(f'\n<b>{entry["lesson_num"]}. </b>({time_str})')
 
-            lessons = entry.get('classes', {}).get(class_num, [])
+            lessons = entry.get('classes', {}).get(class_key, [])
             if not lessons:
                 lines.append('  Вільно')
             else:
@@ -688,7 +707,7 @@ def format_schedule_day(data: dict, weekday: str, class_num) -> str:
                     note_part = f' ({lesson["note"]})' if lesson.get('note') else ''
                     lines.append(f'  📌 <b>{lesson["subject"]}</b>{note_part}')
                     if lesson.get('teacher'):
-                        lines.append(f'  👨‍🏫 {lesson["teacher"]}')
+                        lines.append(f'  {lesson["teacher"]}')
                     if i < len(lessons) - 1:
                         lines.append('  ──')
 
@@ -896,14 +915,86 @@ async def diary_callback(update: Update, context: ContextTypes.DEFAULT_TYPE):
 # --- Schedule Command Handlers ---
 
 
-async def schedule_command(update: Update, _context: ContextTypes.DEFAULT_TYPE):
+async def _schedule_text_for(context, chat, user_id, weekday) -> tuple:
+    """Load schedule data and render one weekday for the stored class."""
+    schedule_data = await _get_schedule_data(context)
+    if not schedule_data:
+        return None, '❌ Не вдалося завантажити розклад.'
+    class_num = _get_chat_class(chat, user_id)
+    if not class_num:
+        return None, '❌ Клас не налаштовано. Використайте /setclass.'
+    text = format_schedule_day(schedule_data, weekday, class_num)
+    if len(text) > 4096:
+        text = text[:4090] + '\n\n✂️ ...(обрізано)'
+    return text, None
+
+
+async def _show_class_picker(update, context) -> bool:
+    """Fetch classes from schedule and render the class-picker keyboard."""
+    schedule_data = await _get_schedule_data(context)
+    if not schedule_data:
+        await update.message.reply_text('❌ Не вдалося завантажити розклад.')
+        return False
+    classes = schedule_data.get('classes', [])
+    if not classes:
+        await update.message.reply_text('❌ Класи не знайдені в розкладі.')
+        return False
+    await update.message.reply_text(
+        '🎒 <b>Оберіть клас</b> — збережеться і більше не питатиметься:',
+        parse_mode='HTML',
+        reply_markup=get_schedule_class_keyboard(classes),
+    )
+    return True
+
+
+async def schedule_command(update: Update, context: ContextTypes.DEFAULT_TYPE):
     user = update.effective_user
     if not is_whitelisted(user.id):
         await update.message.reply_text(t(user.id, 'access_denied'))
         return
-    await update.message.reply_text(
-        '🗓 <b>Розклад уроків</b> — виберіть день:', parse_mode='HTML', reply_markup=get_schedule_day_keyboard()
-    )
+
+    chat = update.effective_chat
+    stored_class = _get_chat_class(chat, user.id)
+
+    if not stored_class:
+        if chat.type != 'private' and not await is_group_admin(update, context):
+            await update.message.reply_text('⚠️ Адміністратор ще не налаштував клас для цієї групи. Використайте /setclass 11')
+            return
+        await _show_class_picker(update, context)
+        return
+
+    await update.message.reply_text('🔄 Завантажую розклад...')
+    today = datetime.now()
+    weekday = SCHEDULE_WEEKDAYS_FULL[today.weekday()]
+    text, err = await _schedule_text_for(context, chat, user.id, weekday)
+    if err:
+        await update.message.reply_text(err)
+        return
+    await update.message.reply_text(text, parse_mode='HTML', reply_markup=get_schedule_day_keyboard())
+
+
+async def setclass_command(update: Update, context: ContextTypes.DEFAULT_TYPE):
+    user = update.effective_user
+    if not is_whitelisted(user.id):
+        await update.message.reply_text(t(user.id, 'access_denied'))
+        return
+
+    chat = update.effective_chat
+    if chat.type != 'private' and not await is_group_admin(update, context):
+        await update.message.reply_text(t(user.id, 'admin_only'))
+        return
+
+    if context.args:
+        try:
+            class_num = int(context.args[0])
+        except ValueError:
+            await update.message.reply_text('❌ Невірний номер класу.')
+            return
+        _set_chat_class(chat, user.id, class_num)
+        await update.message.reply_text(f'✅ Клас <b>{class_num}</b> збережено.')
+        return
+
+    await _show_class_picker(update, context)
 
 
 async def schedule_callback(update: Update, context: ContextTypes.DEFAULT_TYPE):
@@ -917,57 +1008,51 @@ async def schedule_callback(update: Update, context: ContextTypes.DEFAULT_TYPE):
 
     data = query.data
 
-    if data.startswith('schedule_day_'):
-        weekday = data[len('schedule_day_'):]
-        context.user_data['schedule_weekday'] = weekday
-        await query.edit_message_text(f'🗓 <b>{weekday}</b> — виберіть клас:', parse_mode='HTML')
-
-        schedule_data = await _get_schedule_data(context)
-        if not schedule_data:
-            await query.edit_message_text('❌ Не вдалося завантажити розклад.')
-            return
-        classes = schedule_data.get('classes', [])
-        if not classes:
-            await query.edit_message_text('❌ Класи не знайдені в розкладі.')
-            return
-        await query.edit_message_reply_markup(reply_markup=get_schedule_class_keyboard(classes))
-        return
-
     if data.startswith('schedule_class_'):
         class_num_str = data[len('schedule_class_'):]
-        weekday = context.user_data.get('schedule_weekday')
-        if not weekday:
-            await query.edit_message_text('❌ Спочатку виберіть день.')
-            return
-
-        await query.edit_message_text('🔄 Завантажую розклад...')
-        schedule_data = await _get_schedule_data(context)
-        if not schedule_data:
-            await query.edit_message_text('❌ Не вдалося завантажити розклад.')
-            return
-
         try:
             class_num = int(class_num_str)
         except ValueError:
-            class_num = class_num_str
+            await query.edit_message_text('❌ Невірний номер класу.')
+            return
 
-        text = format_schedule_day(schedule_data, weekday, class_num)
-        if len(text) > 4096:
-            text = text[:4090] + '\n\n✂️ ...(обрізано)'
+        chat = update.effective_chat
+        if chat.type != 'private' and not await is_group_admin(update, context):
+            await query.edit_message_text('⚠️ Тільки адміністратор може налаштувати клас для групи.')
+            return
 
-        await query.edit_message_text(text, parse_mode='HTML')
+        _set_chat_class(chat, user_id, class_num)
+        await query.edit_message_text('🔄 Завантажую розклад...')
+
+        today = datetime.now()
+        weekday = SCHEDULE_WEEKDAYS_FULL[today.weekday()]
+        text, err = await _schedule_text_for(context, chat, user_id, weekday)
+        if err:
+            await query.edit_message_text(err)
+            return
+        await query.edit_message_text(text, parse_mode='HTML', reply_markup=get_schedule_day_keyboard())
+        return
+
+    if data.startswith('schedule_day_'):
+        weekday = data[len('schedule_day_'):]
+        await query.edit_message_text('🔄 Завантажую розклад...')
+        text, err = await _schedule_text_for(context, query.message.chat, user_id, weekday)
+        if err:
+            await query.edit_message_text(err)
+            return
+        await query.edit_message_text(text, parse_mode='HTML', reply_markup=get_schedule_day_keyboard())
         return
 
     if data == 'schedule_refresh':
         context.user_data.pop('schedule_cache', None)
         await query.edit_message_text('🔄 Завантажую розклад...')
-        schedule_data = await _get_schedule_data(context)
-        if not schedule_data:
-            await query.edit_message_text('❌ Не вдалося завантажити розклад.')
+        today = datetime.now()
+        weekday = SCHEDULE_WEEKDAYS_FULL[today.weekday()]
+        text, err = await _schedule_text_for(context, query.message.chat, user_id, weekday)
+        if err:
+            await query.edit_message_text(err)
             return
-        await query.edit_message_text(
-            '🗓 <b>Розклад уроків</b> — виберіть день:', parse_mode='HTML', reply_markup=get_schedule_day_keyboard()
-        )
+        await query.edit_message_text(text, parse_mode='HTML', reply_markup=get_schedule_day_keyboard())
         return
 
 
@@ -1244,6 +1329,7 @@ def main():
     app.add_handler(CommandHandler('clearhistory', clear_history))
     app.add_handler(CommandHandler('diary', diary_command))
     app.add_handler(CommandHandler('schedule', schedule_command))
+    app.add_handler(CommandHandler('setclass', setclass_command))
 
     # Callback handlers - diary/schedule first, then language selection, then admin panel
     app.add_handler(CallbackQueryHandler(diary_callback, pattern='^diary_'))