chore(i18n): drop the keys of the removed count line, usual label and open-day link

The day's count line, the usual-range label beside the focus value and
the selection bar's "Open <day>" link are gone, and so are their strings
in all seven bundles. The pulse latest-day read is listed in the dense
read guard with why it stays bounded: one type over one day, the rows the
day view reads anyway. The summaries test's database stub answers that
read.

src/__tests__/dense-measurement-read-guard.test.ts

@@ -81,6 +81,8 @@ const DENSE_TYPES: ReadonlySet<string> = new Set([
  * list, keyed `<file>::<type expression>`, with why each stays bounded.
  */
 const ALLOWED: Record<string, string> = {
+  "lib/analytics/summaries-slice.ts::(shorthand)":
+    "one hourly-mean type (pulse) over one local day, the latest: the same rows the day view reads for that day, bounded by a day, not by the sampling history",
   "lib/insights/comprehensive-generate.ts::(shorthand)":
     'Only reached for SLEEP_DURATION (guarded by `type === "SLEEP_DURATION"`); a few stage rows per night.',
   "lib/insights/derived/vascular-age.ts::VASCULAR_AGE_TYPE":

src/lib/analytics/__tests__/summaries-slice.test.ts

@@ -20,7 +20,7 @@ vi.mock("@/lib/db", () => ({
     // `sourcePriorityJson` to build the rank ladders. `null` here →
     // default ladders.
     user: { findUnique: vi.fn() },
-    measurement: { findFirst: vi.fn() },
+    measurement: { findFirst: vi.fn(), findMany: vi.fn(async () => []) },
     // v1.4.36 — slim slice reads DAY buckets from `measurement_rollups`
     // on the happy path. The freshness watermark inside
     // `ensureUserRollupsFresh` also pokes `measurementRollup.findFirst`;