Adds date-based column retrieval

Adds a method to retrieve column bounds based on a given date, enhancing date-specific event placement.

Removes unnecessary data storage for overflow event titles, simplifying overflow event handling.

src/utils/ColumnDetectionUtils.ts

@@ -67,6 +67,22 @@ export class ColumnDetectionUtils {
         return null;
     }
 
+    /**
+     * Get column bounds by Date
+     */
+    public static getColumnBoundsByDate(date: Date): ColumnBounds | null {
+        if (this.columnBoundsCache.length === 0) {
+            this.updateColumnBoundsCache();
+        }
+
+        // Convert Date to YYYY-MM-DD format
+        var dateString = date.toISOString().split('T')[0];
+
+        // Find column that matches the date
+        var column = this.columnBoundsCache.find(col => col.date === dateString);
+        return column || null;
+    }
+
     /**
      * Clear cache (useful for testing or when DOM structure changes)
      */