fix: Admin Insights actual crash — function props across server/client boundary (v0.55.3)

Server logs (thanks to the user pulling them) showed the real error:
"Functions cannot be passed directly to Client Components" — the server
component page was passing formatShortDate/formatMonth as a `formatDate`
prop into TimeSeriesChart ("use client"). Functions aren't serializable
across the RSC boundary; the two previous fixes (query hardening,
Promise.allSettled) were real improvements but not the actual cause of
the reported crash.

TimeSeriesChart now takes a plain `dateFormat: "day" | "month"` string
and formats internally — BarChart was never affected (its formatValue
prop is only ever used via its own default, never passed from the page).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/lib/changelog.ts

@@ -1,5 +1,5 @@
 // Mirrors CHANGELOG.md at the repo root — update both together.
-export const APP_VERSION = "0.55.2";
+export const APP_VERSION = "0.55.3";
 
 export type ChangelogEntry = {
   version: string;
@@ -11,6 +11,13 @@ export type ChangelogEntry = {
 };
 
 export const CHANGELOG: ChangelogEntry[] = [
+  {
+    version: "0.55.3",
+    date: "2026-07-19 19:00",
+    fixed: [
+      "Admin Insights page's actual crash, found from server logs: the page (a server component) was passing plain formatter functions as props into its chart components (client components) — React can't serialize functions across that boundary. Replaced with a plain string prop (\"day\" vs \"month\") formatted inside the client component instead.",
+    ],
+  },
   {
     version: "0.55.2",
     date: "2026-07-19 18:20",