Implement phone number normalization and access control for Telegram users

- Added functionality to normalize phone numbers for comparison, ensuring only digits are stored and checked.
- Updated configuration to include optional phone number allowlists for users and admins in the environment settings.
- Enhanced authentication logic to allow access based on normalized phone numbers, in addition to usernames.
- Introduced new helper functions for parsing and validating phone numbers, improving code organization and maintainability.
- Added unit tests to validate phone normalization and access control based on phone numbers.

webapp/style.css

@@ -245,7 +245,7 @@ body {
   transform: none;
 }
 
-/* Единый размер маркеров (11px), чтобы и один, и три в строке выглядели одинаково */
+/* Маркеры: компактный размер 11px, кнопки для доступности и тапа */
 .duty-marker,
 .unavailable-marker,
 .vacation-marker {
@@ -254,10 +254,13 @@ body {
   justify-content: center;
   width: 11px;
   height: 11px;
+  padding: 0;
+  border: none;
   font-size: 0.55rem;
   font-weight: 700;
   border-radius: 50%;
   flex-shrink: 0;
+  cursor: pointer;
 }
 
 .duty-marker {
@@ -275,6 +278,18 @@ body {
   background: color-mix(in srgb, var(--vacation) 25%, transparent);
 }
 
+.duty-marker.calendar-marker-active {
+  box-shadow: 0 0 0 2px var(--duty);
+}
+
+.unavailable-marker.calendar-marker-active {
+  box-shadow: 0 0 0 2px var(--unavailable);
+}
+
+.vacation-marker.calendar-marker-active {
+  box-shadow: 0 0 0 2px var(--vacation);
+}
+
 .duty-list {
   font-size: 0.9rem;
 }