feat(ui): add Prime schedule client + PrimeFired event

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ClaudeDo.Ui/Services/PrimeScheduleDto.cs

@@ -0,0 +1,17 @@
+namespace ClaudeDo.Ui.Services;
+
+public sealed record PrimeScheduleDto(
+    Guid Id,
+    DateOnly StartDate,
+    DateOnly EndDate,
+    TimeSpan TimeOfDay,
+    bool WorkdaysOnly,
+    bool Enabled,
+    DateTimeOffset? LastRunAt,
+    string? PromptOverride);
+
+public sealed record PrimeFiredEvent(
+    Guid ScheduleId,
+    bool Success,
+    string Message,
+    DateTimeOffset FiredAt);