Implement DDS exercise, customer UI and local demo

backend/app/session/dds.py

@@ -0,0 +1,50 @@
+"""Выдача очередной учебной карточки ДДС в рамках одного занятия."""
+
+import re
+
+from app.domain.kio import KIO, ResponseStatus
+from app.scenarios.schema import Scenario
+from app.session.state import SessionState, now_utc
+from app.session.timers import SessionTimers
+
+
+def prepare_card(state: SessionState, scenario: Scenario) -> None:
+    """Сменить активную карточку, сохранив общий ID занятия и прошлые результаты."""
+    state.scenario = scenario.model_copy(deep=True)
+    state.scenario_id = scenario.id
+    state.scenario_title = scenario.title
+    state.level = scenario.level.value
+    state.required_fields = list(scenario.required_fields)
+    truth = scenario.ground_truth
+    address_fact = next((fact.value for fact in scenario.facts if "address" in fact.id), "")
+    floor = re.search(r"(\d+)[-‑–]?й?\s*этаж", address_fact, re.IGNORECASE)
+    service = truth.dds.value if truth.dds else None
+    fallback = {"01": "Служба 101", "02": "МВД", "03": "Скорая помощь", "04": "Аварийная служба"}
+    state.kio = KIO(
+        registered_at=now_utc(), caller_number="+7 (495) 000-00-00",
+        address=truth.address or address_fact or None,
+        floor=floor.group(1) if floor else None,
+        incident_type=truth.incident_type, incident_code=truth.incident_code,
+        dds=truth.dds, signs=list(scenario.signs),
+        notify=list(truth.notify) or ([fallback[service]] if service in fallback else []),
+        victims_count=truth.victims,
+        description="; ".join(fact.value for fact in scenario.facts[:3]) or scenario.first_line,
+    )
+    state.dispatched_card = None
+    if service:
+        state.dispatch(service)
+    else:
+        state.kio.response_status = ResponseStatus.TRANSFERRED
+        state.dispatched_card = state.kio.model_copy(deep=True)
+        state.dispatched_at = now_utc()
+
+    state.status_log.clear()
+    state.dds_log.clear()
+    state.bounced_fields.clear()
+    state.crew_selected = None
+    state.crew_assignments.clear()
+    state.phone_reports.clear()
+    state.reply_text = ""
+    state.reply_log.clear()
+    state.timers = SessionTimers()
+    state.on_event("dds.dispatch")