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>

web/src/api/client.ts

@@ -4,8 +4,10 @@ import type {
   CrisisResource,
   DemoPersona,
   DialogEvent,
+  Focus,
   MedsReference,
   Reply,
+  Results,
   TodayPlan,
 } from "./types";
 
@@ -41,12 +43,13 @@ const post = <T>(path: string, body?: unknown) =>
 export const api = {
   signInEmias: (code: string) => post<AuthResult>("/auth/emias", { code }),
   signInEmiasDemo: (personaToken: string) => post<AuthResult>("/auth/emias/demo", { persona_token: personaToken }),
-  signInAnonymous: () => post<AuthResult>("/auth/anonymous"),
+  signInAnonymous: (focus: Focus) => post<AuthResult>("/auth/anonymous", { focus }),
   demoPersonas: () => request<DemoPersona[]>("/demo/personas"),
   crisisResources: () => request<CrisisResource[]>("/crisis/resources"),
   catalog: () => request<Catalog>("/instruments/catalog"),
   medsReference: () => request<MedsReference>("/meds/reference"),
   today: (token: string) => request<TodayPlan>(`/me/${encodeURIComponent(token)}/today`),
+  results: (token: string) => request<Results>(`/me/${encodeURIComponent(token)}/results`),
   sendEvent: async (token: string, event: DialogEvent) =>
     (await post<{ replies: Reply[] }>(`/dialog/${encodeURIComponent(token)}/events`, event)).replies,
   outbox: async (token: string) =>