feat(workstate): read-model live-state minimal des conversations/délégations (Lot A backend)

Introduit le module application `workstate` (modèle de read-model live + snapshots
des conversations/délégations en cours) et l'expose via la couche terminal
(exports mod/registry). Câble la surface Tauri : DTO, commande et state pour
exposer le live-state au frontend (lib + state + commands), avec tests.

QA verte. Réserve environnementale non bloquante : tests loopback socket Unix
réels non exécutables en sandbox (UnixListener::bind PermissionDenied),
alternatives avec skips vertes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

crates/app-tauri/src/dto.rs

@@ -10,9 +10,9 @@ use serde::{Deserialize, Serialize};
 
 use application::{
     AppError, CreateProjectInput, CreateProjectOutput, GitGraphOutput, HealthInput, HealthReport,
-    LayoutKind, ListProjectsOutput, OpenProjectOutput,
+    LayoutKind, ListProjectsOutput, LiveSessionKind, OpenProjectOutput, ProjectWorkState,
 };
-use domain::{Project, ProjectId};
+use domain::{AgentBusyState, Project, ProjectId};
 
 /// Request DTO for the `health` command.
 #[derive(Debug, Clone, Default, Deserialize)]
@@ -1472,6 +1472,83 @@ impl LiveAgentListDto {
     }
 }
 
+/// Runtime family of a live work-state session.
+#[derive(Debug, Clone, Copy, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub enum LiveWorkSessionKindDto {
+    /// Raw PTY-backed CLI session.
+    Pty,
+    /// Structured agent-session backend.
+    Structured,
+}
+
+impl From<LiveSessionKind> for LiveWorkSessionKindDto {
+    fn from(kind: LiveSessionKind) -> Self {
+        match kind {
+            LiveSessionKind::Pty => Self::Pty,
+            LiveSessionKind::Structured => Self::Structured,
+        }
+    }
+}
+
+/// Live session coordinates in the project work-state read model.
+#[derive(Debug, Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct LiveWorkSessionDto {
+    /// The layout node currently hosting the session view.
+    pub node_id: String,
+    /// The live session id.
+    pub session_id: String,
+    /// Runtime family that owns the session.
+    pub kind: LiveWorkSessionKindDto,
+}
+
+/// One manifest agent's current live/busy state.
+#[derive(Debug, Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct AgentWorkStateDto {
+    /// Agent id.
+    pub agent_id: String,
+    /// Agent display name.
+    pub name: String,
+    /// Runtime profile id assigned to the agent.
+    pub profile_id: String,
+    /// Live session, if any.
+    pub live: Option<LiveWorkSessionDto>,
+    /// Current mediated-input busy state.
+    pub busy: AgentBusyState,
+}
+
+/// Project-level read model for conversation/delegation UX.
+#[derive(Debug, Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ProjectWorkStateDto {
+    /// Manifest agents in manifest order, enriched with live/busy state.
+    pub agents: Vec<AgentWorkStateDto>,
+}
+
+impl From<ProjectWorkState> for ProjectWorkStateDto {
+    fn from(state: ProjectWorkState) -> Self {
+        Self {
+            agents: state
+                .agents
+                .into_iter()
+                .map(|agent| AgentWorkStateDto {
+                    agent_id: agent.agent_id.to_string(),
+                    name: agent.name,
+                    profile_id: agent.profile_id.to_string(),
+                    live: agent.live.map(|live| LiveWorkSessionDto {
+                        node_id: live.node_id.to_string(),
+                        session_id: live.session_id.to_string(),
+                        kind: live.kind.into(),
+                    }),
+                    busy: agent.busy,
+                })
+                .collect(),
+        }
+    }
+}
+
 /// Request DTO for `attach_live_agent`: bind an already-running agent session to
 /// a visible layout cell without spawning a new process.
 #[derive(Debug, Clone, Deserialize)]