Update CSS styles for day markers and adjust layout behavior

- Changed the flex-wrap property of day markers from wrap to nowrap for improved layout consistency.
- Standardized the size of duty, unavailable, and vacation markers to 11px, ensuring uniformity in appearance.
- Adjusted font size of markers to 0.55rem for better readability.

webapp/style.css

@@ -146,7 +146,7 @@ body {
 .day-markers {
   display: flex;
   flex-direction: row;
-  flex-wrap: wrap;
+  flex-wrap: nowrap;
   justify-content: center;
   gap: 2px;
   align-items: center;
@@ -175,15 +175,16 @@ body {
   transform: none;
 }
 
+/* Единый размер маркеров (11px), чтобы и один, и три в строке выглядели одинаково */
 .duty-marker,
 .unavailable-marker,
 .vacation-marker {
   display: inline-flex;
   align-items: center;
   justify-content: center;
-  width: 14px;
-  height: 14px;
-  font-size: 0.6rem;
+  width: 11px;
+  height: 11px;
+  font-size: 0.55rem;
   font-weight: 700;
   border-radius: 50%;
   flex-shrink: 0;