Add speech-topic policy from tomorrow and a morning family talk.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/HSchool.Server/Api/SpeechRulesModels.cs

@@ -0,0 +1,47 @@
+using HSchool.Content;
+
+namespace HSchool.Server.Api;
+
+internal sealed record SpeechRulesResponse(
+    string Students,
+    string Staff,
+    string? PendingStudents,
+    string? PendingStaff)
+{
+    public static SpeechRulesResponse From(SchoolSpeechRules rules) =>
+        new(rules.Students, rules.Staff, rules.PendingStudents, rules.PendingStaff);
+}
+
+internal sealed record SetSpeechRulesRequest(string? Students, string? Staff);
+
+internal enum SpeechRulesError
+{
+    None,
+    UnknownSchool,
+    UnknownPolicy,
+}
+
+internal sealed record SpeechRulesOutcome(SpeechRulesError Error, SpeechRulesResponse? Rules)
+{
+    public static SpeechRulesOutcome Ok(SchoolSpeechRules rules) =>
+        new(SpeechRulesError.None, SpeechRulesResponse.From(rules));
+
+    public static SpeechRulesOutcome Fail(SpeechRulesError error) => new(error, null);
+}
+
+internal static class SpeechRulesValidation
+{
+    public static bool TryParse(string value, out string policy, out SpeechRulesError error)
+    {
+        if (!SpeechPolicies.IsKnown(value))
+        {
+            policy = "";
+            error = SpeechRulesError.UnknownPolicy;
+            return false;
+        }
+
+        policy = value;
+        error = SpeechRulesError.None;
+        return true;
+    }
+}