chore(knip): drop seven dead exports flagged by W-SIMPLIFIER

`tokenKind`, `withBackgroundEventSafe`, and `isRollupFresh` had no
callers anywhere in the tree, so the symbol + JSDoc + index re-export
are removed. `PROGRESS_TICK_RECORDS`, `MAINTAINED_LOCALES`, and
`SUB_PAGE_METRIC` lose the `export` keyword — every reader lives in the
same module, so the constants stay local. `isRollupFresh` was deferred
in v1.4.41 pending the persistent-rollup reader landing on develop; the
read-path now carries its own per-tier freshness probe and never
imported the helper.

No behaviour change. Knip drops from 35 unused exports to 29.

src/lib/i18n/config.ts

@@ -19,7 +19,7 @@ export const localeLabels: Record<Locale, string> = {
  * know to expect rough edges and where to contribute fixes. Promoting
  * a locale here turns the banner off.
  */
-export const MAINTAINED_LOCALES: ReadonlySet<Locale> = new Set(["de", "en"]);
+const MAINTAINED_LOCALES: ReadonlySet<Locale> = new Set(["de", "en"]);
 
 export function isMaintainedLocale(locale: Locale): boolean {
   return MAINTAINED_LOCALES.has(locale);

src/lib/insights/chart-tokens.ts

@@ -205,10 +205,3 @@ export function tokenToMetric(token: ChartToken): string {
   return token.slice("metric:".length);
 }
 
-/** Token kinds the renderer needs to distinguish. MeasurementType tokens
- *  feed `<HealthChart>`; `metric:MOOD` mounts the dedicated, self-fetching
- *  `<MoodChart>` instead. */
-export function tokenKind(token: ChartToken): "measurement" | "mood" {
-  if (token === "metric:MOOD") return "mood";
-  return "measurement";
-}

src/lib/insights/sub-page-metric.ts

@@ -40,7 +40,7 @@
 // `gewicht`, `bmi`, `schlaf`, `stimmung`, `medikamente`, `workouts`)
 // stay flat — they predate v1.4.32 and the maintainer's audit kept
 // them as direct entries.
-export const SUB_PAGE_METRIC = {
+const SUB_PAGE_METRIC = {
   // ── vitals ──
   blutdruck: ["BLOOD_PRESSURE_SYS", "BLOOD_PRESSURE_DIA", "PULSE"],
   puls: ["PULSE"],

src/lib/logging/background.ts

@@ -33,17 +33,3 @@ export async function withBackgroundEvent<T>(
   });
 }
 
-/**
- * Fire-and-forget Variante: schluckt Fehler und loggt sie nur.
- * Fuer Webhook-Sends, Achievement-Checks, etc.
- */
-export async function withBackgroundEventSafe(
-  taskName: string,
-  fn: (evt: WideEventBuilder) => Promise<void>,
-): Promise<void> {
-  try {
-    await withBackgroundEvent(taskName, fn);
-  } catch {
-    // Fehler wurde bereits ins Event geschrieben und emittiert
-  }
-}

src/lib/logging/index.ts

@@ -10,7 +10,7 @@ export { WideEventBuilder } from "./event-builder";
 export { eventStorage, getEvent, annotate } from "./context";
 export { shouldEmit } from "./sampler";
 export { emitEvent, emitIfSampled } from "./transports";
-export { withBackgroundEvent, withBackgroundEventSafe } from "./background";
+export { withBackgroundEvent } from "./background";
 export {
   appendLogEvent,
   readLogBuffer,

src/lib/measurements/import-apple-health-export.ts

@@ -148,7 +148,7 @@ interface MutableTypeStat {
 }
 
 /** Tick frequency for the live `ImportJob.progress` write. */
-export const PROGRESS_TICK_RECORDS = 1_000;
+const PROGRESS_TICK_RECORDS = 1_000;
 const SPOT_FLUSH_BATCH = 500;
 const WORKOUT_FLUSH_BATCH = 100;
 

src/lib/rollups/measurement-rollups.ts

@@ -23,10 +23,9 @@
  *
  * Reads:
  *   - `readRollupBuckets` returns the persisted rows. The reader
- *     side (`analytics`, `comprehensive`, `summaries-slice`) calls
- *     `isRollupFresh` first to decide whether to fall through to the
- *     live aggregator + persist-on-miss. Cheap heuristic — one
- *     indexed query for the newest measurement's `measuredAt`.
+ *     side (`analytics`, `comprehensive`, `summaries-slice`) decides
+ *     whether to fall through to the live aggregator + persist-on-miss
+ *     via its own per-tier freshness probe.
  */
 import { prisma } from "@/lib/db";
 import { getGlobalBoss } from "@/lib/jobs/boss-instance";
@@ -303,42 +302,6 @@ export async function readRollupBuckets(
   }));
 }
 
-/**
- * Cheap freshness heuristic — one indexed query against
- * `measurements` for the newest row per (user, type). Returns true
- * when the persisted rollup covers every measurement currently in
- * the DB, false when there's a newer measurement than the freshest
- * rollup row (the rollup needs a recompute).
- *
- * `null` newest measurement means the user has no rows of this type,
- * in which case the rollups are trivially fresh (empty == empty).
- */
-export async function isRollupFresh(
-  userId: string,
-  type: MeasurementType,
-  granularity: RollupGranularity,
-  newestComputedAt: Date | null,
-): Promise<boolean> {
-  const newest = await prisma.measurement.findFirst({
-    where: { userId, type, deletedAt: null },
-    orderBy: { measuredAt: "desc" },
-    select: { measuredAt: true, updatedAt: true },
-  });
-  if (!newest) {
-    // No measurements at all — empty rollup set is fresh by definition.
-    return true;
-  }
-  if (!newestComputedAt) {
-    // We have measurements but no rollup rows — definitely stale.
-    return false;
-  }
-  // Stale when the latest row was written / updated after the most
-  // recent rollup `computed_at` for this `(user, type, granularity)`.
-  const watermark =
-    newest.updatedAt > newest.measuredAt ? newest.updatedAt : newest.measuredAt;
-  return watermark <= newestComputedAt;
-}
-
 // ─── internals ────────────────────────────────────────────
 
 /**