domain: add Sharing entities and ports (ShareScope, ShareTarget, ShareLink, InviteCode, VisibilityFilter)

crates/domain/tests/entities/mod.rs

@@ -13,3 +13,5 @@ mod derivative_asset;
 mod duplicate;
 mod album;
 mod tag;
+mod share_scope;
+mod share_link;

crates/domain/tests/entities/share_link.rs

@@ -0,0 +1,25 @@
+use domain::entities::{LinkAccessLevel, ShareLink};
+use domain::value_objects::SystemId;
+
+#[test]
+fn new_link_is_valid() {
+    let link = ShareLink::new(SystemId::new(), "tok123", LinkAccessLevel::ViewOnly);
+    assert!(link.is_valid());
+    assert_eq!(link.use_count, 0);
+}
+
+#[test]
+fn deactivated_invalid() {
+    let mut link = ShareLink::new(SystemId::new(), "tok123", LinkAccessLevel::ViewOnly);
+    link.deactivate();
+    assert!(!link.is_valid());
+}
+
+#[test]
+fn max_uses_exhausted() {
+    let mut link = ShareLink::new(SystemId::new(), "tok123", LinkAccessLevel::ViewOnly);
+    link.max_uses = Some(2);
+    link.record_use();
+    link.record_use();
+    assert!(!link.is_valid());
+}

crates/domain/tests/entities/share_scope.rs

@@ -0,0 +1,16 @@
+use chrono::{Duration, Utc};
+use domain::entities::{ScopeType, ShareScope, ShareableType};
+use domain::value_objects::{DateTimeStamp, SystemId};
+
+#[test]
+fn not_expired_when_no_expiry() {
+    let scope = ShareScope::new(ScopeType::Link, ShareableType::Album, SystemId::new(), SystemId::new());
+    assert!(!scope.is_expired());
+}
+
+#[test]
+fn expired_when_past() {
+    let mut scope = ShareScope::new(ScopeType::Link, ShareableType::Album, SystemId::new(), SystemId::new());
+    scope.expires_at = Some(DateTimeStamp::from_datetime(Utc::now() - Duration::hours(1)));
+    assert!(scope.is_expired());
+}