feat: crisis message after the test and non-blocking; weapon answer triggers nothing; ЕМИАС demo = Никита

- CRISIS_BLOCKING (default off for the demo): a crisis no longer locks the dialog; the message and the
  doctor's acute alert still happen. The clinical protocol (blocking, immediate stop) stays behind the flag and
  keeps its tests.
- Crisis signals inside a questionnaire (intake red flags, high C-SSRS, PHQ-9 item 9) no longer stop it: the
  test is finished and the crisis message comes at the end; the doctor's alert is raised at once/at the end.
- Weapon access: asked and stored, triggers nothing (rule disabled, no red flag, no safety block).
- ЕМИАС demo persona is «Никита В.»; the one-click demo stays «Андрей С.».

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

app/dialog/scale_session.py

@@ -33,6 +33,7 @@ from dataclasses import replace
 from datetime import timedelta
 from typing import Any
 
+from app.config import get_settings
 from app.core.privacy import scrub
 from app.core.scales import Item, ScaleDef, ScaleResult, load_scale, score
 from app.db import repo
@@ -237,7 +238,10 @@ async def _record(
     sex = profile.sex if profile is not None and profile.sex in ("m", "f") else None
     result = score(scale.id, answers, sex=sex)  # type: ignore[arg-type]
     crisis_flags = [f for f in result.flags if f in ctx.texts.settings.crisis_flags]
-    if crisis_flags or session["idx"] + 1 >= len(scale.items):
+    # Clinical protocol (crisis_blocking): a crisis flag ends the scale at once. Demo default: the scale is finished
+    # first and the crisis message comes at the end of the questionnaire (engine defers it), blocking nothing.
+    stop_now = bool(crisis_flags) and get_settings().crisis_blocking
+    if stop_now or session["idx"] + 1 >= len(scale.items):
         return await _finish(ctx, scale, session, answers, result, crisis_flags)
     updated = {**session, "answers": answers, "idx": session["idx"] + 1}
     sessions = {**(ctx.data.get("scales") or {}), scale.id: updated}
@@ -278,7 +282,7 @@ async def _finish(
     # Crisis path decided by the scale's own flags (deterministic), not by the LLM.
     risk_screen = ctx.texts.settings.risk_screen_scale
     if crisis_open(ctx.data):
-        crisis = Step(next_state="crisis")
+        crisis = Step(next_state="crisis") if get_settings().crisis_blocking else Step()
     else:
         crisis = open_crisis(ctx, categories=[], source=f"scale:{scale.id}")
     step = done.then(crisis)