Show the details of both RAG databases on the information page (#980)

app/MindWork AI Studio/Tools/LongExtensions.cs

@@ -1,7 +1,46 @@
+using AIStudio.Tools.PluginSystem;
+
 namespace AIStudio.Tools;
 
 public static class LongExtensions
 {
+    private static readonly string[] COUNT_SUFFIXES = ["k", "M", "B", "T"];
+
+    /// <summary>
+    /// Formats a count so that large numbers stay readable: 1456 becomes 1.46k, 4512900 becomes 4.51M.
+    /// </summary>
+    /// <remarks>
+    /// Counts scale in thousands, not in steps of 1024 — that is what FileSize is for, and storage
+    /// sizes keep using it. Numbers below 1000 stay exact, because shortening them would hide the
+    /// difference between 4 and 999. The decimal separator follows the culture of the active language
+    /// plugin rather than the one of the thread, which never moves along with the app's language.
+    /// </remarks>
+    /// <param name="count">The number to format.</param>
+    /// <returns>The formatted number.</returns>
+    public static string CompactCount(this long count)
+    {
+        var culture = I18N.I.Culture;
+        if (count is > -1_000 and < 1_000)
+            return count.ToString("N0", culture);
+
+        var order = -1;
+        double value = count;
+        while (Math.Abs(value) >= 1_000 && order < COUNT_SUFFIXES.Length - 1)
+        {
+            order++;
+            value /= 1_000;
+        }
+
+        return $"{value.ToString("0.##", culture)}{COUNT_SUFFIXES[order]}";
+    }
+
+    /// <summary>
+    /// Formats a count so that large numbers stay readable.
+    /// </summary>
+    /// <param name="count">The number to format.</param>
+    /// <returns>The formatted number.</returns>
+    public static string CompactCount(this int count) => ((long)count).CompactCount();
+
     /// <summary>
     /// Formats the file size in a human-readable format.
     /// </summary>