case 4697 - relative date filters use the user's time zone

Token date ranges (*today*, *lastmonth* ...) are built from the user's local
time in clientTimeStamp but were converted to UTC with ToUniversalTime(), the
server's time zone. They are now converted with clientTimeStamp.Offset. Lists
and dashboard widgets share this builder. Deferred: daylight saving edge and
dashboard grouping by UTC day (both need the client's time zone name).
Changelog.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/8.0/ayanova/docs/changelog.md

@@ -31,6 +31,7 @@ IN PROGRESS
 - Server: new [trusted reverse proxies](ops-config-trusted-proxies.md) setting for a reverse proxy that runs on a different computer from the AyaNova server, so AyaNova sees each user's own address.
 - Server: while a report renders, its template no longer holds the User's actual access token or download key; the AyaNova server adds the User's access only to the report's requests to the `ayApiUrl` address. Templates that call the AyaNova API through any other address need to be changed. See [API usage in reports](ay-report-edit.md#api-usage).
 - Server: users with the "Business administration - restricted" role can view [report templates](adm-report-templates.md) but no longer create, edit or import them, as described for that [role](ay-biz-admin-roles.md). Give the full "Business administration" role to users who edit report templates.
+- Server: relative date filters such as "today" or "last month" (in lists and dashboard widgets) now start and end the period at midnight in the user's own [time zone](ay-start-form-data-tables.md#filtering-dates-and-time-zones). Previously, for a user in a different time zone from the server, records close to the start or end of the period could be included or left out by mistake.
 - Server: the SuperUser account can no longer be deleted.
 - Server: role rights corrected to match the documentation: "Service technician - restricted" users can view tax codes, projects, unit models and meter readings; "Business administration" users can view server metrics; Accounting users can no longer enter unit meter readings; only "Business administration" users can switch an [integrated application](api-integrated-applications.md) on or off or delete it.
 - Server: fixed direct notification messages to a user: only the first one within 12 hours was delivered, now every message is.