add pinned messages

src/utils.rs

@@ -79,3 +79,32 @@ pub fn format_date(timestamp: i32) -> String {
 pub fn get_day(timestamp: i32) -> i64 {
     timestamp as i64 / 86400
 }
+
+/// Форматирование timestamp в полную дату и время (DD.MM.YYYY HH:MM)
+pub fn format_datetime(timestamp: i32) -> String {
+    let secs = timestamp as i64;
+    
+    // Время
+    let hours = ((secs % 86400) / 3600) as u32;
+    let minutes = ((secs % 3600) / 60) as u32;
+    let local_hours = (hours + 3) % 24; // MSK
+    
+    // Дата
+    let days_since_epoch = secs / 86400;
+    let year = 1970 + (days_since_epoch / 365) as i32;
+    let day_of_year = days_since_epoch % 365;
+    
+    let months = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
+    let mut month = 1;
+    let mut day = day_of_year as i32;
+    
+    for (i, &m) in months.iter().enumerate() {
+        if day < m {
+            month = i + 1;
+            break;
+        }
+        day -= m;
+    }
+    
+    format!("{:02}.{:02}.{} {:02}:{:02}", day + 1, month, year, local_hours, minutes)
+}