feat(windows): persistance et restauration des fenêtres au redémarrage (#40)

Persiste l'état des fenêtres (layout/position) et le restaure au
relancement de l'application. Découpage hexagonal :
- domaine : modèle et port d'état des fenêtres (layout, ports)
- application : use cases de persistance/restauration
- infrastructure : store window_state (adapter de persistance)
- présentation : câblage app-tauri (state, commands, lib)
Couvert par des tests ciblés domaine/application/infrastructure.

Depend de #39 (fermeture des fenêtres auxiliaires).

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

crates/app-tauri/src/state.rs

@@ -33,13 +33,14 @@ use application::{
     ReadMemoryIndex, ReadProjectContext, ReadSkill, RecallMemory, ReconcileLayouts,
     ReconcileLiveState, ReconcileLiveStateInput, RecordTurn, RecordTurnProvider, ReferenceProfiles,
     RenameLayout, RenameSprint, ReorderSprints, ResizeTerminal, ResolveAgentPermissions,
-    ResolveMemoryLinks, RetryBackgroundTask, RotateConversationLog, SaveEmbedderProfile,
-    SaveModelServer, SaveProfile, SessionLimitService, SetActiveLayout, SnapshotRunningAgents,
-    SpawnBackgroundCommand, StopLiveAgent, StructuredSessions, SuggestedThisSession,
-    SyncAgentWithTemplate, TerminalSessions, UnassignSkillFromAgent, UnassignTicketFromSprint,
-    UnlinkIssues, UpdateAgentContext, UpdateAgentPermissions, UpdateIssue, UpdateIssueCarnet,
-    UpdateLiveState, UpdateMemory, UpdateProjectContext, UpdateProjectPermissions, UpdateSkill,
-    UpdateTemplate, WakeSessionProvider, WriteMemory, WriteToTerminal, AGENT_MEMORY_RECALL_BUDGET,
+    ResolveMemoryLinks, RestoreOpenWindows, RetryBackgroundTask, RotateConversationLog,
+    SaveEmbedderProfile, SaveModelServer, SaveProfile, SessionLimitService, SetActiveLayout,
+    SnapshotOpenWindows, SnapshotRunningAgents, SpawnBackgroundCommand, StopLiveAgent,
+    StructuredSessions, SuggestedThisSession, SyncAgentWithTemplate, TerminalSessions,
+    UnassignSkillFromAgent, UnassignTicketFromSprint, UnlinkIssues, UpdateAgentContext,
+    UpdateAgentPermissions, UpdateIssue, UpdateIssueCarnet, UpdateLiveState, UpdateMemory,
+    UpdateProjectContext, UpdateProjectPermissions, UpdateSkill, UpdateTemplate,
+    WakeSessionProvider, WriteMemory, WriteToTerminal, AGENT_MEMORY_RECALL_BUDGET,
 };
 use async_trait::async_trait;
 use domain::ports::{
@@ -49,7 +50,7 @@ use domain::ports::{
     EmbedderPromptStore, EventBus, FileSystem, GitPort, IdGenerator, IssueNumberAllocator,
     IssueStore, MemoryRecall, MemoryStore, PermissionStore, ProcessSpawner, ProfileStore,
     ProjectStore, PtyPort, ScheduledTask, Scheduler, SkillStore, SprintStore, TemplateStore,
-    ToolInvoker, WakeError, WakeReason,
+    ToolInvoker, WakeError, WakeReason, WindowStateStore,
 };
 use domain::profile::{
     AgentProfile, ContextInjection, McpConfigStrategy, McpTransport, StructuredAdapter,
@@ -71,13 +72,14 @@ use infrastructure::{
     FsEmbedderPromptStore, FsHandoffStore, FsIssueNumberAllocator, FsIssueStore, FsLiveStateStore,
     FsMemoryStore, FsModelServerRegistry, FsOrchestratorWatcher, FsPermissionStore, FsProfileStore,
     FsProjectStore, FsProviderSessionStore, FsSkillStore, FsSprintStore, FsTemplateStore,
-    Git2Repository, HeuristicHandoffSummarizer, HttpOpenAiCompatibleProbe, IdeaiContextStore,
-    InMemoryConversationRegistry, InMemoryMailbox, LlamaCppRuntime, LocalFileSystem,
-    LocalManagedProcess, LocalProcessSpawner, McpServer, MediatedInbox, NaiveMemoryRecall,
-    OrchestratorWatchHandle, PortablePtyAdapter, RwFileGuard, StructuredSessionFactory,
-    SystemClock, SystemMillisClock, TicketToolProvider, TokioBroadcastEventBus, TokioScheduler,
-    ToolPolicyRegistry, UuidGenerator, VectorMemoryRecall, DEFAULT_OLLAMA_BASE_URL,
-    ONNX_CACHE_SUBDIR, RECOMMENDED_ONNX_MODELS, VECTOR_HTTP_ENABLED, VECTOR_ONNX_ENABLED,
+    FsWindowStateStore, Git2Repository, HeuristicHandoffSummarizer, HttpOpenAiCompatibleProbe,
+    IdeaiContextStore, InMemoryConversationRegistry, InMemoryMailbox, LlamaCppRuntime,
+    LocalFileSystem, LocalManagedProcess, LocalProcessSpawner, McpServer, MediatedInbox,
+    NaiveMemoryRecall, OrchestratorWatchHandle, PortablePtyAdapter, RwFileGuard,
+    StructuredSessionFactory, SystemClock, SystemMillisClock, TicketToolProvider,
+    TokioBroadcastEventBus, TokioScheduler, ToolPolicyRegistry, UuidGenerator, VectorMemoryRecall,
+    DEFAULT_OLLAMA_BASE_URL, ONNX_CACHE_SUBDIR, RECOMMENDED_ONNX_MODELS, VECTOR_HTTP_ENABLED,
+    VECTOR_ONNX_ENABLED,
 };
 
 use crate::chat::ChatBridge;
@@ -900,6 +902,10 @@ pub struct AppState {
     // --- Windows (L10) ---
     /// Detach a tab into a new OS window (persists the workspace topology).
     pub move_tab: Arc<MoveTabToNewWindow>,
+    /// Persist open Tauri webview-window state on main-window shutdown.
+    pub snapshot_open_windows: Arc<SnapshotOpenWindows>,
+    /// Load restorable Tauri webview-window state on startup.
+    pub restore_open_windows: Arc<RestoreOpenWindows>,
     // --- Background tasks (B8) ---
     /// Spawn a command-backed first-class background task.
     pub spawn_background_command: Arc<SpawnBackgroundCommand>,
@@ -1054,10 +1060,15 @@ impl AppState {
             Arc::clone(&fs) as Arc<dyn FileSystem>,
             app_data_dir.to_string_lossy().into_owned(),
         ));
+        let window_state_store = Arc::new(FsWindowStateStore::new(
+            Arc::clone(&fs) as Arc<dyn FileSystem>,
+            app_data_dir.to_string_lossy().into_owned(),
+        ));
 
         // Port-typed handles for injection.
         let fs_port = Arc::clone(&fs) as Arc<dyn FileSystem>;
         let store_port = Arc::clone(&store) as Arc<dyn ProjectStore>;
+        let window_state_port = Arc::clone(&window_state_store) as Arc<dyn WindowStateStore>;
         let events_port = Arc::clone(&event_bus) as Arc<dyn EventBus>;
 
         // --- Use cases (ports injected as Arc<dyn Port>) ---
@@ -2211,6 +2222,12 @@ impl AppState {
             Arc::clone(&store_port),
             Arc::clone(&ids) as Arc<dyn IdGenerator>,
         ));
+        let snapshot_open_windows =
+            Arc::new(SnapshotOpenWindows::new(Arc::clone(&window_state_port)));
+        let restore_open_windows = Arc::new(RestoreOpenWindows::new(
+            Arc::clone(&window_state_port),
+            Arc::clone(&store_port),
+        ));
 
         Self {
             health,
@@ -2340,6 +2357,8 @@ impl AppState {
             fs_port: Arc::clone(&fs_port),
             home_dir,
             move_tab,
+            snapshot_open_windows,
+            restore_open_windows,
             spawn_background_command,
             cancel_background_task,
             retry_background_task,