feat(mustache): apply_format now accepts timezone info.

mustache/pipes.odin

@@ -228,7 +228,15 @@ apply_filter :: proc(value: any, filter: ^Pipe_Filter, pos: int, ctx: []any) ->
 			date_format = df
 		}
 
-		str2, err := apply_format(str, filter.args[:], pos, date_format)
+		// Resolve timezone (optional — empty is fine, means display as-is)
+		tz_name := ""
+		if raw := resolve_name("timezone", ctx); raw != nil {
+			if s, s_ok := reflect.as_string(raw); s_ok {
+				tz_name = s
+			}
+		}
+
+		str2, err := apply_format(str, filter.args[:], pos, date_format, tz_name)
 		if err != nil {
 			return value, err
 		} else {
@@ -249,6 +257,7 @@ apply_format :: proc(
 	args: []string,
 	pos: int,
 	date_format: string,
+	timezone_name: string,
 ) -> (
 	result: string,
 	err: Error,
@@ -270,7 +279,22 @@ apply_format :: proc(
 		}
 	}
 
-	log.debugf("date: '%s' format: '%s'", iso, date_format)
+	target_tz, tz_ok := get_cached_tz(timezone_name)
+	if !tz_ok {
+		return "", Error_Body {
+			msg = fmt.tprintf("unable to load timezone '%s'", timezone_name),
+			pos = pos,
+			kind = .Data,
+		}
+	}
+
+	if target_tz != nil {
+		components, _ = convert_to_tz(components, target_tz)
+	} else if components.has_offset {
+		components.tz_abbr = format_offset(components.offset_seconds)
+	}
+
+	log.debugf("date: '%s' format: '%s' tz: '%s'", iso, date_format, timezone_name)
 	return format_date(components, fmt_str), nil
 }