feat(illness): Rest Mode — annotate score/recovery/streaks during an active episode + FHIR/doctor-report

An active illness/condition episode annotates, it never penalises: the
measured number is untouched, only the narrative changes.

- rest-mode.ts: one server-authoritative resolver (module-gated, fail-soft)
  for "is the account in Rest Mode + which episodes back it". iOS mirrors the
  resolved context, never recomputes the suppression.
- health-score: /api/analytics attaches a value-free Rest Mode annotation;
  computeHealthScore stays pure (score never adjusted).
- recovery-score: computeRecoveryScore carries the Rest Mode context as of the
  scored day; the persisted blend is unchanged.
- coach-nudge: pause cadence-nudges during an active episode (new
  skippedDuringIllness counter, gate sits before the trigger search).
- achievements: bridgeFrozenStreakGaps freezes (does not break) every
  day-streak across illness days; never invents a streak, a non-illness gap
  still breaks.
- coincident-deviation: reframe a fired flag as illness-explained; vital
  numbers untouched. Surfaced as a neutral line on the insights card.
- coach snapshot: illness history + active illness as load-bearing context so
  the coach knows about Rest Mode (no decrypted note reaches the prompt).
- FHIR: illness episodes map to Condition (generic disease root, label on
  code.text, patient-reported/unconfirmed) + a bounding Encounter.
- doctor-report: module-gated illness section in the aggregator + PDF table
  (retrospective, neutral palette); FHIR Condition section in the bundle.

i18n x6 for the report + reframe copy. Tests: score-annotation-not-
penalisation, streak-freeze, coach-nudge pause, FHIR Condition/Encounter
mapping, doctor-report inclusion, Rest Mode resolver. typecheck/lint/test
green, openapi in sync, knip clean.

src/app/api/analytics/route.ts

@@ -18,6 +18,7 @@ import {
 } from "@/lib/analytics/bp-in-target-fast-path";
 import { computeUserHealthScoreFastPath } from "@/lib/analytics/health-score-fast-path";
 import { isModuleEnabled } from "@/lib/modules/gate";
+import { resolveRestMode } from "@/lib/illness/rest-mode";
 import { buildHealthScoreBpInputs } from "@/lib/analytics/health-score-inputs";
 import { deriveBpWindow90 } from "@/lib/analytics/window-confidence";
 import { computeCorrelationHypothesesFastPath } from "@/lib/analytics/correlations-fast-path";
@@ -444,6 +445,21 @@ async function buildAnalyticsResponse(user: AuthedUser) {
     moodEnabled,
   });
 
+  // v1.18.1 P4 — Rest Mode annotation. When an illness/condition episode is
+  // active we frame the score (not penalise it): the number above is left
+  // exactly as computed and we attach a value-free "you were unwell" context.
+  // Resolved server-side so iOS mirrors the same fact, never recomputing it.
+  if (healthScore) {
+    const restMode = await resolveRestMode(user.id);
+    healthScore.restMode = restMode.active
+      ? {
+          active: true,
+          since: restMode.since,
+          episodeCount: restMode.episodeCount,
+        }
+      : null;
+  }
+
   return {
     summaries: results,
     bmi,