Update icons for event attributes

WebApp/Models/AppIcons.cs

@@ -17,9 +17,9 @@ namespace WebApp.Models
             
             return loe switch
             {
-                1 => "1",
-                2 => "2",
-                3 => "3",
+                1 => "○",
+                2 => "◐",
+                3 => "●",
                 _ => Icons.Material.Filled.QuestionMark
             };
         }
@@ -30,7 +30,6 @@ namespace WebApp.Models
         public static string IndividualEvent = "ⓘ";
         public static string PresubmissionEvent = "ⓟ";
         public static string PresentationEvent = "";
-        public static string QuestionMark = "❔";
 
         // Tooltip mapping for icon unicode characters
         public static Dictionary<string, string> IconTooltips => new()
@@ -40,9 +39,22 @@ namespace WebApp.Models
             { IndividualEvent, "Individual Event" },
             { PresubmissionEvent, "Presubmission" },
             { PresentationEvent, "Presentation/Interview" },
-            { "①", "Level of Effort: 1" },
-            { "②", "Level of Effort: 2" },
-            { "③", "Level of Effort: 3" }
+            { "○", "Level of Effort: 1" },
+            { "◐", "Level of Effort: 2" },
+            { "●", "Level of Effort: 3" }
+        };
+
+        // Color mapping for icon unicode characters
+        public static Dictionary<string, string> IconColors => new()
+        {
+            { OnSiteActivity, "#ff9800" },        // Orange
+            { RegionalEvent, "#2196f3" },         // Blue
+            { IndividualEvent, "#9c27b0" },       // Purple
+            { PresubmissionEvent, "#4caf50" },    // Green
+            { PresentationEvent, "#f44336" },     // Red
+            { "○", "#757575" },                  // Gray
+            { "◐", "#616161" },                  // Darker Gray
+            { "●", "#424242" }                   // Even Darker Gray
         };
 
         public static string EventEffort(EventDefinition eventDefinition)