feat(settings): a time-format preference and one home for insight pills

The clock format followed the UI language with no way out — an English
interface forced AM/PM everywhere. A new profile preference (automatic,
24-hour, 12-hour) feeds every formatter through the shared locale
context, persists on the user row and rides the profile endpoints. The
insight pill list in settings gains the same eye toggle the overview
tiles have, so ordering and visibility live in one place; the page-side
'manage detail pages' block folds into a link there. Includes the
locale bundles for both features and the regenerated API contract.

src/app/api/auth/me/route.ts

@@ -67,6 +67,9 @@ export const GET = apiHandler(async () => {
     // storage stays SI; this only drives the display-time transform
     // branch. Null defaults to "metric" on the client.
     unitPreference: user.unitPreference === "imperial" ? "imperial" : "metric",
+    // Hour-cycle display preference (AUTO follows the locale convention,
+    // H12 / H24 pin the cycle). Clients mirror this into their formatters.
+    timeFormat: user.timeFormat ?? "AUTO",
     lastReportPracticeName: user.lastReportPracticeName ?? null,
     // v1.4.47 W3 — per-user Coach opt-out. Default `false` if the
     // column is absent (partial-deploy rollback safety, see migration