feat(dashboard): demo console with web chat, demo clock, scenario playback and split screen

- pages/2_Демо-консоль.py: persona selector, virtual clock bar (+1 h, to 08:00/20:00,
  next day, reset with confirm), fallback patient web chat (buttons from Reply.buttons,
  kind styling, outbox drained after every action and on a 2 s fragment poll), scenario panel
- pages/3_Сплит-экран.py: patient chat or PATIENT_WEB_URL iframe on the left, compact doctor
  panel (patients, live alerts, red banner on a new acute alert) on the right
- console/playback.py: data/synthetic/<persona>.jsonl runner (advance_to/press/text/
  expect_color/start), date chaining between days, pause on failure with retry/skip/manual
- console/api.py: own HTTP client over the frozen API contract, ApiError only

Refs #17

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dashboard/console/api.py

@@ -0,0 +1,158 @@
+"""Thin synchronous HTTP client for the demo console (frozen API contract, `app/api/schemas.py`).
+
+The console never imports backend code: it talks to `API_BASE_URL` only. Responses are kept as plain dicts —
+the console reads a handful of fields and must survive a backend that still serves fixtures (#12).
+Every failure is raised as `ApiError` with a short Russian message, so pages can show it instead of crashing.
+"""
+
+from __future__ import annotations
+
+import os
+from typing import Any, Protocol
+
+import httpx
+
+DEFAULT_DOCTOR = "doc-smirnova"
+DEFAULT_TOKEN = "tok-andrey"
+
+
+def api_base_url() -> str:
+    return os.environ.get("API_BASE_URL", "http://localhost:8000").rstrip("/")
+
+
+def doctor_id() -> str:
+    return os.environ.get("DEMO_DOCTOR_ID", DEFAULT_DOCTOR)
+
+
+def fallback_token() -> str:
+    return os.environ.get("DEMO_PERSONA_TOKEN", DEFAULT_TOKEN)
+
+
+class ApiError(RuntimeError):
+    """Any API failure (network, HTTP status, bad JSON) with a message fit for the presenter."""
+
+
+class DemoApi(Protocol):
+    """What the playback runner needs; `ConsoleApi` implements it, tests use a fake."""
+
+    def clock(self) -> dict[str, Any]: ...
+
+    def advance(self, days: float = 0, hours: float = 0) -> dict[str, Any]: ...
+
+    def send_event(
+        self,
+        token: str,
+        type_: str,
+        *,
+        text: str | None = None,
+        button: str | None = None,
+        params: dict[str, Any] | None = None,
+    ) -> list[dict[str, Any]]: ...
+
+    def outbox(self, token: str) -> list[dict[str, Any]]: ...
+
+    def patients(self, doctor: str) -> list[dict[str, Any]]: ...
+
+
+class ConsoleApi:
+    """Client for `/api/v1`. Short timeouts everywhere except clock moves, which replay the scheduler."""
+
+    def __init__(self, base_url: str | None = None, *, timeout: float = 5.0, client: httpx.Client | None = None):
+        self.base_url = (base_url or api_base_url()).rstrip("/")
+        self._timeout = timeout
+        self._client = client or httpx.Client(timeout=timeout)
+
+    # ------------------------------------------------------------------ plumbing
+    def _request(self, method: str, path: str, *, timeout: float | None = None, **kwargs: Any) -> Any:
+        url = f"{self.base_url}{path}"
+        try:
+            resp = self._client.request(method, url, timeout=timeout or self._timeout, **kwargs)
+        except httpx.TimeoutException as exc:
+            raise ApiError(f"{method} {path}: API не ответил вовремя") from exc
+        except httpx.HTTPError as exc:
+            raise ApiError(f"{method} {path}: API недоступен ({type(exc).__name__})") from exc
+        if resp.status_code >= 400:
+            raise ApiError(f"{method} {path}: HTTP {resp.status_code}")
+        try:
+            return resp.json()
+        except ValueError as exc:
+            raise ApiError(f"{method} {path}: ответ не JSON") from exc
+
+    def close(self) -> None:
+        self._client.close()
+
+    # ------------------------------------------------------------------ service
+    def health(self) -> bool:
+        try:
+            return self._request("GET", "/health", timeout=2).get("status") == "ok"
+        except (ApiError, AttributeError):
+            return False
+
+    # ------------------------------------------------------------------ demo controls (ADR-005)
+    def personas(self) -> list[dict[str, Any]]:
+        return list(self._request("GET", "/api/v1/demo/personas"))
+
+    def clock(self) -> dict[str, Any]:
+        return dict(self._request("GET", "/api/v1/demo/clock"))
+
+    def advance(self, days: float = 0, hours: float = 0) -> dict[str, Any]:
+        # The backend replays the scheduler up to the new time inside this call: allow it time.
+        body = {"days": days, "hours": hours}
+        return dict(self._request("POST", "/api/v1/demo/clock/advance", json=body, timeout=60))
+
+    def reset(self) -> dict[str, Any]:
+        return dict(self._request("POST", "/api/v1/demo/reset", timeout=60))
+
+    # ------------------------------------------------------------------ patient dialog
+    def send_event(
+        self,
+        token: str,
+        type_: str,
+        *,
+        text: str | None = None,
+        button: str | None = None,
+        params: dict[str, Any] | None = None,
+    ) -> list[dict[str, Any]]:
+        body: dict[str, Any] = {"type": type_, "params": params or {}}
+        if text is not None:
+            body["text"] = text
+        if button is not None:
+            body["button"] = button
+        data = self._request("POST", f"/api/v1/dialog/{token}/events", json=body, timeout=30)
+        return list(data.get("replies", []))
+
+    def outbox(self, token: str) -> list[dict[str, Any]]:
+        return list(self._request("GET", f"/api/v1/dialog/{token}/outbox").get("replies", []))
+
+    def history(self, token: str, limit: int = 100) -> list[dict[str, Any]]:
+        return list(self._request("GET", f"/api/v1/dialog/{token}/history", params={"limit": limit}))
+
+    # ------------------------------------------------------------------ doctor side
+    def patients(self, doctor: str) -> list[dict[str, Any]]:
+        return list(self._request("GET", f"/api/v1/doctors/{doctor}/patients"))
+
+    def alerts(self, doctor: str, since_id: int = -1, open_only: bool = False) -> list[dict[str, Any]]:
+        params = {"since_id": since_id, "open_only": str(open_only).lower()}
+        return list(self._request("GET", f"/api/v1/doctors/{doctor}/alerts", params=params))
+
+    def ack(self, alert_id: int, doctor: str) -> dict[str, Any]:
+        return dict(self._request("POST", f"/api/v1/alerts/{alert_id}/ack", json={"doctor_id": doctor}))
+
+
+def personas_or_fallback(api: ConsoleApi) -> tuple[list[dict[str, Any]], str | None]:
+    """Demo personas from the API; on failure a single fallback persona (env token) and the error text."""
+    try:
+        personas = [p for p in api.personas() if isinstance(p, dict) and p.get("token")]
+        if personas:
+            return personas, None
+        error = "API вернул пустой список персон"
+    except ApiError as exc:
+        error = str(exc)
+    token = fallback_token()
+    fallback = {
+        "token": token,
+        "display_name": "Андрей С." if token == DEFAULT_TOKEN else token,
+        "therapy_day": 0,
+        "scenario": "data/synthetic/andrey.jsonl" if token == DEFAULT_TOKEN else None,
+    }
+    return [fallback], error