From d37d01e6d823ba41a42ad846d4e40aeacb8f1467 Mon Sep 17 00:00:00 2001
From: Ilia Mashkov <hikkikomori7@gmail.com>
Date: Wed, 24 Jun 2026 13:21:29 +0300
Subject: [PATCH] feat(Pairing): add Pairing and Role types

---
 src/entities/Pairing/domain/types/index.ts   |  4 +++
 src/entities/Pairing/domain/types/pairing.ts | 26 ++++++++++++++++++++
 src/entities/Pairing/model/types/index.ts    |  4 +++
 src/entities/Pairing/model/types/pairing.ts  |  9 +++++++
 4 files changed, 43 insertions(+)
 create mode 100644 src/entities/Pairing/domain/types/index.ts
 create mode 100644 src/entities/Pairing/domain/types/pairing.ts
 create mode 100644 src/entities/Pairing/model/types/index.ts
 create mode 100644 src/entities/Pairing/model/types/pairing.ts

diff --git a/src/entities/Pairing/domain/types/index.ts b/src/entities/Pairing/domain/types/index.ts
new file mode 100644
index 0000000..4db65eb
--- /dev/null
+++ b/src/entities/Pairing/domain/types/index.ts
@@ -0,0 +1,4 @@
+export type {
+    Pairing,
+    Role,
+} from './pairing';
diff --git a/src/entities/Pairing/domain/types/pairing.ts b/src/entities/Pairing/domain/types/pairing.ts
new file mode 100644
index 0000000..f54b0da
--- /dev/null
+++ b/src/entities/Pairing/domain/types/pairing.ts
@@ -0,0 +1,26 @@
+/**
+ * A slot within a Pairing that a font fills.
+ */
+export type Role = 'header' | 'body';
+
+/**
+ * The atomic unit of comparison: a header font + a body font.
+ * Carries a surrogate `id` (stable for the card's life, never tracks content)
+ * and the two font ids it pairs. Text and typography are global to the Board,
+ * not stored here.
+ */
+export interface Pairing {
+    /**
+     * Surrogate key generated at creation, stable for the card's life.
+     * Distinguishes duplicates with identical fonts. Focal/cycling key on this.
+     */
+    id: string;
+    /**
+     * Font entity id filling the header role.
+     */
+    headerFontId: string;
+    /**
+     * Font entity id filling the body role.
+     */
+    bodyFontId: string;
+}
diff --git a/src/entities/Pairing/model/types/index.ts b/src/entities/Pairing/model/types/index.ts
new file mode 100644
index 0000000..4db65eb
--- /dev/null
+++ b/src/entities/Pairing/model/types/index.ts
@@ -0,0 +1,4 @@
+export type {
+    Pairing,
+    Role,
+} from './pairing';
diff --git a/src/entities/Pairing/model/types/pairing.ts b/src/entities/Pairing/model/types/pairing.ts
new file mode 100644
index 0000000..d8a49e1
--- /dev/null
+++ b/src/entities/Pairing/model/types/pairing.ts
@@ -0,0 +1,9 @@
+/**
+ * Re-export of the Pairing identity types. The source of truth lives in
+ * `domain/types` so the pure domain segment can reference them without importing
+ * `model` (FSD+ domain isolation: ui -> model -> domain, never back).
+ */
+export type {
+    Pairing,
+    Role,
+} from '../../domain/types';