fix(coach): integration cleanup for the Horizon-B merge

Drop the unused extractCoachClaims helper (+ its CoachClaim types) and the
unused CoachPlanStatus type — the deterministic grader uses the boolean claim
helpers directly, and the plan status enum is consumed via the const array.
Update the dashboard-snapshot suite for the locale-keyed cell: stub the i18n
context and add getQueriesData to the fake query client so the locale-aware
preload probe is exercised.

src/lib/ai/coach/coach-prose-grounding.ts

@@ -142,22 +142,6 @@ export function findUnverifiedCoachNumbers(
  * judge covers — never a false positive that blocks a good answer.
  * ────────────────────────────────────────────────────────────────────────── */
 
-/** A claim category the deterministic grader recognises. */
-export type CoachClaimKind =
-  /** A verdict against a clinical/own threshold ("you have hypertension"). */
-  | "threshold"
-  /** Framing against the user's own range ("above your usual", "for you"). */
-  | "ownBaseline"
-  /** A confident state verdict ("you're clearly improving"). */
-  | "confidentVerdict";
-
-/** One structured claim the grader extracted from Coach prose. */
-export interface CoachClaim {
-  kind: CoachClaimKind;
-  /** The phrase that triggered the match (truncated for logging). */
-  source: string;
-}
-
 /**
  * Confident-verdict phrasings: an unhedged state assertion. These are the
  * phrasings a data-honesty case must NOT see when the snapshot is sparse —
@@ -246,26 +230,6 @@ export function hasThresholdVerdict(prose: string): boolean {
   return THRESHOLD_VERDICT_PATTERNS.some((p) => p.test(prose));
 }
 
-/**
- * Extract the structured claims the grader recognises from Coach prose. Each
- * entry is a high-precision match the golden-set graders assert on. The list is
- * intentionally non-exhaustive — see the module-level posture note.
- */
-export function extractCoachClaims(prose: string): CoachClaim[] {
-  if (!prose) return [];
-  const claims: CoachClaim[] = [];
-  const push = (kind: CoachClaimKind, patterns: readonly RegExp[]) => {
-    for (const p of patterns) {
-      const m = p.exec(prose);
-      if (m) claims.push({ kind, source: m[0].slice(0, 48) });
-    }
-  };
-  push("threshold", THRESHOLD_VERDICT_PATTERNS);
-  push("confidentVerdict", CONFIDENT_VERDICT_PATTERNS);
-  push("ownBaseline", OWN_BASELINE_PATTERNS);
-  return claims;
-}
-
 /**
  * Soft-correct the prose: replace each unverified numeric token with a neutral
  * placeholder so a drifted figure never reaches the user as if authoritative,

src/lib/ai/coach/plans.ts

@@ -48,8 +48,6 @@ export const COACH_PLAN_STATUSES = [
   "abandoned",
 ] as const;
 
-export type CoachPlanStatus = (typeof COACH_PLAN_STATUSES)[number];
-
 /** Hard cap on non-terminal (proposed + active) plans per user. */
 export const MAX_PLANS_PER_USER = 25;
 /** Per-field text length cap (mirrors the Zod gate + the prompt instruction). */

src/lib/queries/__tests__/use-dashboard-snapshot.test.tsx

@@ -29,6 +29,14 @@ vi.mock("@tanstack/react-query", () => ({
   }),
 }));
 
+// v1.21.3 (b) — the hook now keys the cell by the active locale via
+// `useTranslations()`; the suite exercises the hook body directly (react-query
+// is mocked), so stub the i18n context to a fixed locale rather than mounting a
+// provider.
+vi.mock("@/lib/i18n/context", () => ({
+  useTranslations: () => ({ locale: "en" }),
+}));
+
 import {
   useDashboardSnapshot,
   prefetchDashboardSnapshot,
@@ -80,10 +88,12 @@ describe("useDashboardSnapshot — auto-refresh on an open page", () => {
     expect(opts.refetchOnWindowFocus).toBe(true);
   });
 
-  it("routes the queryKey through the centralised factory", () => {
+  it("routes the queryKey through the centralised factory, keyed by locale", () => {
     useDashboardSnapshot();
     const opts = lastOpts();
-    expect(opts.queryKey).toEqual(queryKeys.dashboardSnapshot());
+    // v1.21.3 (b) — the live cell carries the active locale; a zero-arg
+    // invalidation still prefix-matches it.
+    expect(opts.queryKey).toEqual(queryKeys.dashboardSnapshot("en"));
   });
 
   it("retries once on transient failures only (network / 5xx, never 4xx)", () => {
@@ -130,6 +140,14 @@ describe("prefetchDashboardSnapshot — hydration-safe promise handoff", () => {
     state?: { data: unknown; dataUpdatedAt: number } | undefined,
   ): QueryClient {
     return {
+      // v1.21.3 (b) — the preloader probes ALL locale-keyed snapshot cells
+      // via `getQueriesData` (prefix) then reads each cell's state. A fresh
+      // `state` stands in for one warm locale cell; absent → no warm cell.
+      getQueriesData: vi
+        .fn()
+        .mockReturnValue(
+          state ? [[queryKeys.dashboardSnapshot("en"), state.data]] : [],
+        ),
       getQueryState: vi.fn().mockReturnValue(state),
       getQueryData: getQueryDataMock,
       setQueryData: setQueryDataMock,