From c1bb3abeefbf389442a71d4485be94f1af7c7b58 Mon Sep 17 00:00:00 2001
From: TekH <h.tek@digitaldata.works>
Date: Tue, 21 Jul 2026 14:37:54 +0200
Subject: [PATCH] feat(annotation): Add AnnotationOrigin value object

- Add AnnotationOrigin enum (BottomLeft/TopLeft)
- BottomLeft = PDF native coordinate system (default)
- TopLeft = UI-friendly coordinate system (requires Y-axis conversion)
- Shared with stamp operations for consistency
---
 .../Models/ValueObjects/AnnotationOrigin.cs    | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 DocumentOperator.Domain/Models/ValueObjects/AnnotationOrigin.cs

diff --git a/DocumentOperator.Domain/Models/ValueObjects/AnnotationOrigin.cs b/DocumentOperator.Domain/Models/ValueObjects/AnnotationOrigin.cs
new file mode 100644
index 0000000..3ed0773
--- /dev/null
+++ b/DocumentOperator.Domain/Models/ValueObjects/AnnotationOrigin.cs
@@ -0,0 +1,18 @@
+namespace DocumentOperator.Domain.Models.ValueObjects;
+
+/// <summary>
+/// Coordinate origin point for PDF annotations.
+/// PDF default is BottomLeft, but users may prefer TopLeft for easier UI integration.
+/// </summary>
+public enum AnnotationOrigin
+{
+    /// <summary>
+    /// Bottom-left corner (PDF native coordinate system, default)
+    /// </summary>
+    BottomLeft,
+    
+    /// <summary>
+    /// Top-left corner (common in UI frameworks)
+    /// </summary>
+    TopLeft
+}