feat: add separate Freekassa SBP and card payment methods

Split Freekassa into sub-methods: СБП/QR (i=44) and Карты РФ (i=36).
Each method has independent enable/display_name settings, dedicated
handlers, keyboard buttons, and correct payment_system_id routing.
Webhook notifications resolve display name from payment metadata.

app/keyboards/inline.py

@@ -1569,7 +1569,31 @@ def get_payment_methods_keyboard(amount_kopeks: int, language: str = DEFAULT_LAN
         )
         has_direct_payment_methods = True
 
-    if settings.is_freekassa_enabled():
+    if settings.is_freekassa_sbp_enabled():
+        sbp_name = settings.get_freekassa_sbp_display_name()
+        keyboard.append(
+            [
+                InlineKeyboardButton(
+                    text=texts.t('PAYMENT_FREEKASSA_SBP', f'📱 {sbp_name}'),
+                    callback_data=_build_callback('freekassa_sbp'),
+                )
+            ]
+        )
+        has_direct_payment_methods = True
+
+    if settings.is_freekassa_card_enabled():
+        card_name = settings.get_freekassa_card_display_name()
+        keyboard.append(
+            [
+                InlineKeyboardButton(
+                    text=texts.t('PAYMENT_FREEKASSA_CARD', f'💳 {card_name}'),
+                    callback_data=_build_callback('freekassa_card'),
+                )
+            ]
+        )
+        has_direct_payment_methods = True
+
+    if settings.is_freekassa_enabled() and not settings.is_freekassa_sbp_enabled() and not settings.is_freekassa_card_enabled():
         freekassa_name = settings.get_freekassa_display_name()
         keyboard.append(
             [