fix: fix some ui displays and features miss implemented

crates/domain/src/events.rs

@@ -1,7 +1,7 @@
 //! Domain events published on the [`crate::ports::EventBus`] and relayed to the
 //! presentation layer (ARCHITECTURE §3.2).
 
-use crate::ids::{AgentId, ProjectId, SessionId, TemplateId};
+use crate::ids::{AgentId, ProjectId, SessionId, SkillId, TemplateId};
 use crate::template::TemplateVersion;
 
 /// Events emitted by the domain/application as state changes occur.
@@ -54,6 +54,15 @@ pub enum DomainEvent {
         /// Version it was brought up to.
         to: TemplateVersion,
     },
+    /// A skill was assigned to (or unassigned from) an agent.
+    SkillAssigned {
+        /// The agent whose skill set changed.
+        agent_id: AgentId,
+        /// The skill involved.
+        skill_id: SkillId,
+        /// `true` if assigned, `false` if unassigned.
+        assigned: bool,
+    },
     /// A tab's layout changed.
     LayoutChanged {
         /// The project whose layout changed.