Unify team grid, limit avatars to brand colours, keep duty tags on one line

Elternbeirat.Web/Shared/TeamMember.cs

@@ -49,13 +49,14 @@ public sealed record TeamMember(string Name, string? Role, IReadOnlyList<string>
     public const string ContainerName = "team";
 
     /// <summary>
-    ///     The modifier for larger cards, <c>::: team gross</c>; also the class it adds
-    ///     to the block.
+    ///     The modifier for the chair, <c>::: team gross</c>; also the class it adds to
+    ///     the block. The cards keep the shared raster; only the role chip is
+    ///     highlighted.
     /// </summary>
     /// <remarks>
     ///     A word after the block name rather than a block of its own
     ///     (<c>::: team-gross</c>): the block stays <c>team</c>, so a typo in the
-    ///     modifier only costs the larger size, never the whole grid. <c>groß</c> is
+    ///     modifier only costs the highlight, never the whole grid. <c>groß</c> is
     ///     accepted too; <c>gross</c> is the documented form because it types the same
     ///     on every keyboard.
     /// </remarks>
@@ -73,9 +74,14 @@ public sealed record TeamMember(string Name, string? Role, IReadOnlyList<string>
 
     /// <summary>
     ///     How many avatar colours there are; <c>app.css</c> defines
-    ///     <c>--color-avatar-1</c> to <c>--color-avatar-5</c> to match.
+    ///     <c>--color-avatar-1</c> (brand blue) and <c>--color-avatar-2</c> (brand
+    ///     green) to match.
     /// </summary>
-    public const int ColorCount = 5;
+    /// <remarks>
+    ///     Only the two brand colours: more hues made the board look busy and pulled it
+    ///     away from the IGMH palette.
+    /// </remarks>
+    public const int ColorCount = 2;
 
     /// <summary>
     ///     FNV-1a offset basis and prime (32 bit), see <see cref="Fnv"/>.
@@ -135,14 +141,16 @@ public sealed record TeamMember(string Name, string? Role, IReadOnlyList<string>
     ///     is a fixed hash (FNV-1a) and not <see cref="string.GetHashCode()"/>, which
     ///     .NET randomises per process. Surrounding whitespace does not count.
     ///     <para>
-    ///         FNV-1a alone spreads short names badly over its low bits, which the
-    ///         remainder by <see cref="ColorCount"/> reads: four of the six "Beisitz"
-    ///         members shared one colour. The MurmurHash3 finaliser (<see cref="Mix"/>)
-    ///         stirs all bits into the low ones first.
+    ///         FNV-1a alone spreads short names badly, so the MurmurHash3 finaliser
+    ///         (<see cref="Mix"/>) stirs all bits first. The colour is then taken from
+    ///         the <b>high</b> bits (multiply by <see cref="ColorCount"/>, keep the top
+    ///         32 bits) rather than a remainder, which would read only the low bits:
+    ///         with two colours that put eight of the ten board members on the same
+    ///         one.
     ///     </para>
     /// </remarks>
     public static int ColorOf(string name) =>
-        (int)(Mix(Fnv(name.Trim())) % ColorCount) + 1;
+        (int)(((ulong)Mix(Fnv(name.Trim())) * ColorCount) >> 32) + 1;
 
     /// <summary>
     ///     Reads a person from the first paragraph of a list item.
@@ -207,7 +215,7 @@ public sealed record TeamMember(string Name, string? Role, IReadOnlyList<string>
         string.Equals(container.Info, ContainerName, StringComparison.OrdinalIgnoreCase);
 
     /// <summary>
-    ///     Whether a team block asks for larger cards (<c>::: team gross</c>).
+    ///     Whether a team block asks for the chair highlight (<c>::: team gross</c>).
     /// </summary>
     /// <param name="container">The team block.</param>
     /// <returns>