feat(web): two-stage questionnaires, screening result and diary by result

- Sign-in: centred ЕМИАС card without the sidebar; anonymous entry asks «Депрессия / ПТСР».
- Stage 1 is the same for everyone and follows the fixed order of the MVP questionnaire:
  PHQ-2 → trauma filter/TSQ → RUS-AUDIT-S → C-SSRS → context; stage 2 only where stage 1
  is positive. Starts without a profile.
- After stage 1 the patient sees a preliminary result (screening, not a diagnosis), stored
  with the record; it switches on the diary modules (depression / PTSD).
- Stage 2 diary: morning (sleep, sleep quality, alcohol) and evening (mood, medication,
  3 PHQ-9 items in rotation, short PCL-5); C-SSRS since last contact only under risk;
  flags on weekly means against the personal norm; scheduled full scales with change
  (remission, response, worsening).
- Questionnaire log: GET /me/{token}/results and the «Мои результаты» screen.
- Questionnaires centred without the sidebar and without scale names; «Продолжить позже»
  goes home; confirmations are toasts; free-text comments are optional.
- Demo policy config/questionnaire_demo.yaml (INTAKE_DEMO only, not a clinical approval).

ADR-012.

Refs #77

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

app/dialog/flows/meds.py

@@ -46,6 +46,8 @@ from app.llm.med_qa import fallback_text, med_qa
 
 QUESTION_STATE = "meds.question"
 SIDE_EFFECT_TEXT_STATE = "meds.side_effect_text"
+# A client sends this button when the person submits a free-text step without writing anything.
+NO_COMMENT = "text:skip"
 SIDE_EFFECT_CODES = ("nausea", "insomnia", "headache", "dizziness", "agitation", "other")
 SKIP_REASONS = ("forgot", "side_effects", "quit", "other")
 
@@ -378,7 +380,8 @@ def _side_effect_code(code: str) -> Any:
     async def handler(ctx: Ctx, event: Event, ref: str) -> Step:
         if code == "other":
             return Step(
-                replies=[Reply(text=load_meds_texts().side_effects.describe)],
+                # kind="question": the engine waits for free text here (clients show an input, optional).
+                replies=[Reply(text=load_meds_texts().side_effects.describe, kind="question")],
                 next_state=SIDE_EFFECT_TEXT_STATE,
                 data={"med_se_ref": ref},
             )
@@ -393,12 +396,15 @@ for _code in SIDE_EFFECT_CODES:
 
 @state(SIDE_EFFECT_TEXT_STATE)
 async def _side_effect_text(ctx: Ctx, event: Event) -> Step:
+    ref = ctx.data.get("med_se_ref")
+    if event.type == "button" and event.button == NO_COMMENT:
+        # The description is optional: «other» side effect without words.
+        return await _after_side_effects(ctx, ["other"], str(ref) if ref else None)
     if event.type != "text" or ctx.text is None:
         return await leave_to_idle(ctx, event, {"med_se_ref": None})
     facts = await ctx.gateway.extract_checkin(ctx.text)
     # Store only normalised codes, never the description itself (it stays in the scrubbed message log).
     codes = [str(c) for c in facts.side_effects] if facts is not None and facts.side_effects else ["other"]
-    ref = ctx.data.get("med_se_ref")
     return await _after_side_effects(ctx, codes, str(ref) if ref else None)
 
 
@@ -428,7 +434,7 @@ async def _menu_question(ctx: Ctx, event: Event) -> Step:
     t = load_meds_texts().question
     if await current_prescription(ctx) is None:
         return Step(replies=[menu_reply(ctx, t.no_prescription)])
-    return Step(replies=[Reply(text=t.prompt)], next_state=QUESTION_STATE)
+    return Step(replies=[Reply(text=t.prompt, kind="question")], next_state=QUESTION_STATE)
 
 
 async def answer_question(ctx: Ctx, rx: Rx | None) -> str: