feat(workstate): UI live-state des conversations/délégations (Lot A frontend)

Ajoute le port et l'adaptateur workState (+ mock) côté frontend, le type domaine
associé, et la feature `workstate` (panneau ProjectWorkStatePanel + hook
useProjectWorkState) consommant le read-model live exposé par le backend.
Intègre le panneau dans ProjectsView. Tests verts (workstate + projects).

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

frontend/src/adapters/index.ts

@@ -25,6 +25,7 @@ import { TauriMemoryGateway } from "./memory";
 import { TauriEmbedderGateway } from "./embedder";
 import { TauriGitGateway } from "./git";
 import { TauriPermissionGateway } from "./permission";
+import { TauriWorkStateGateway } from "./workState";
 
 function notImplemented(what: string): never {
   const err: GatewayError = {
@@ -57,6 +58,7 @@ export function createTauriGateways(): Gateways {
     memory: new TauriMemoryGateway(),
     embedder: new TauriEmbedderGateway(),
     permission: new TauriPermissionGateway(),
+    workState: new TauriWorkStateGateway(),
   };
 }
 
@@ -74,4 +76,5 @@ export {
   TauriEmbedderGateway,
   TauriGitGateway,
   TauriPermissionGateway,
+  TauriWorkStateGateway,
 };

frontend/src/adapters/mock/index.ts

@@ -31,6 +31,7 @@ import type {
   PermissionSet,
   Project,
   ProjectPermissions,
+  ProjectWorkState,
   ProfileAvailability,
   ResumableAgent,
   Skill,
@@ -64,6 +65,7 @@ import type {
   TemplateGateway,
   TerminalGateway,
   TerminalHandle,
+  WorkStateGateway,
 } from "@/ports";
 import { applyOperation, singleLeafTree } from "@/features/layout/layout";
 
@@ -1648,6 +1650,19 @@ export class MockPermissionGateway implements PermissionGateway {
   }
 }
 
+export class MockWorkStateGateway implements WorkStateGateway {
+  private states = new Map<string, ProjectWorkState>();
+
+  /** Seeds the read-model returned for a project (deterministic tests/dev). */
+  _setProjectWorkState(projectId: string, state: ProjectWorkState): void {
+    this.states.set(projectId, structuredClone(state));
+  }
+
+  async getProjectWorkState(projectId: string): Promise<ProjectWorkState> {
+    return structuredClone(this.states.get(projectId) ?? { agents: [] });
+  }
+}
+
 function mostRestrictive(
   project?: PermissionSet["fallback"],
   agent?: PermissionSet["fallback"],
@@ -1676,6 +1691,7 @@ export function createMockGateways(): Gateways {
     memory: new MockMemoryGateway(),
     embedder: new MockEmbedderGateway(),
     permission: new MockPermissionGateway(),
+    workState: new MockWorkStateGateway(),
   };
 }
 

frontend/src/adapters/workState.ts

@@ -0,0 +1,17 @@
+/**
+ * Tauri adapter for {@link WorkStateGateway}.
+ *
+ * This is the only frontend place that knows the `get_project_work_state`
+ * command name; features consume the gateway port through DI.
+ */
+
+import { invoke } from "@tauri-apps/api/core";
+
+import type { ProjectWorkState } from "@/domain";
+import type { WorkStateGateway } from "@/ports";
+
+export class TauriWorkStateGateway implements WorkStateGateway {
+  getProjectWorkState(projectId: string): Promise<ProjectWorkState> {
+    return invoke<ProjectWorkState>("get_project_work_state", { projectId });
+  }
+}