feat(backend,frontend): lot utilisateur #310 #311 #312 #313 — horodatage conversation, stop agent robuste, préférence terminal par défaut, paramètres projet (QA verte)

- #310: horodatage de tous les messages et événements de conversation visibles — composant partagé EntryTimestamp, timestamps propagés dans le transcript chat, les annonces inter-agent et le viewer de conversation, normalisation côté domain/adapters (conversation_log, paginate).
- #311: stop d'agent robuste pour PTY non monté, sessions headless et CLI custom — lifecycle/orchestrator durcis, ponts chat app-tauri/web-server alignés, arrêt fiable sans session orpheline.
- #312: préférence globale d'interface terminal par défaut — nouveau store settings (domain/application/infrastructure + tests), DTO et commandes backend, adapter frontend userSettings, panneau TerminalSettings dans les paramètres globaux.
- #313: Paramètres du projet — contexte de projet éditable et couleur de thème par projet (ProjectSettingsPanel + projectTheme), teinte des onglets projet, persistance via DTO projet.

QA verte (GO QA sur feature/batch-310-311-312-313-chat-stop-prefs-theme) — vérifications Git: git diff --cached --check OK; staging borné à crates/ et frontend/ (74 fichiers, +2105/-531), commit unique de lot conforme à la convention des lots (précédents batch-151/158/159, batch-210/211/212) car les fichiers partagés (dto.rs, commands.rs, CustomAgentChatView) entrelacent les 4 tickets.

fichiers .ideai/* (agents/test.md, chat-drafts.json, system-permissions.json, tickets/counter.json, tickets/index.json, tickets/308-313/), attachments/ et scripts/ hors périmètre et préservés en worktree ; aucun push.

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

crates/application/src/agent/lifecycle.rs

@@ -19,6 +19,7 @@ use domain::ports::{
     FileSystem, FsError, IdGenerator, LocalPath, MemoryQuery, MemoryRecall, PermissionStore,
     PreparedContext, ProfileStore, ProjectStore, PtyPort, RemotePath, SecretStore, SessionPlan,
     SkillStore, SpawnSpec, StructuredProviderLaunchPolicy, SystemPermissionStore,
+    UserSettingsStore,
 };
 use domain::profile::{
     resolve_effort, EffortSelection, McpConfigStrategy, OpenCodeProviderConfig, StructuredAdapter,
@@ -27,12 +28,12 @@ use domain::profile::{
 use domain::sandbox::{compile_sandbox_plan, PathAccess, PathGrant, SandboxContext, SandboxPlan};
 use domain::{
     bound_handoff_summary, Agent, AgentId, AgentManifest, AgentOrigin, AgentProfile,
-    ContextInjection, ConversationId, ConversationParty, DomainEvent, EffectivePermissions,
-    Handoff, HandoffStore, ManagedTempKind, ManifestEntry, MarkdownDoc, MemoryIndexEntry,
-    MemoryType, NetworkPolicy, NodeId, OrchestrationCapabilitySnapshot, PermissionProjector,
-    PluginMcpServerSpec, ProfileId, Project, ProjectPath, ProjectedFile, ProjectionContext,
-    ProjectorKey, ProviderSessionStore, PtySize, SessionId, SessionKind, SessionStatus, SkillKind,
-    TerminalSession, HANDOFF_SUMMARY_MAX_CHARS,
+    ContextInjection, ConversationId, ConversationParty, DefaultAgentTerminalInterface,
+    DomainEvent, EffectivePermissions, Handoff, HandoffStore, ManagedTempKind, ManifestEntry,
+    MarkdownDoc, MemoryIndexEntry, MemoryType, NetworkPolicy, NodeId,
+    OrchestrationCapabilitySnapshot, PermissionProjector, PluginMcpServerSpec, ProfileId, Project,
+    ProjectPath, ProjectedFile, ProjectionContext, ProjectorKey, ProviderSessionStore, PtySize,
+    SessionId, SessionKind, SessionStatus, SkillKind, TerminalSession, HANDOFF_SUMMARY_MAX_CHARS,
 };
 
 use domain::live_state::WorkStatus;
@@ -1123,6 +1124,7 @@ impl ChangeAgentProfile {
                 mcp_runtime: None,
                 allow_structured_alongside_pty: false,
                 require_structured: false,
+                terminal_interface: None,
                 fresh_start: false,
                 managed_temp_exposure: ManagedTempExposureRequest::default(),
             })
@@ -1310,6 +1312,8 @@ pub struct LaunchAgentInput {
     ///
     /// Historical callers leave this `false`, preserving the PTY launch contract.
     pub require_structured: bool,
+    /// Explicit human terminal interface. `None` lets the global preference apply.
+    pub terminal_interface: Option<DefaultAgentTerminalInterface>,
     /// Cold restart request: ignore the cell's previous conversation id and create
     /// a new provider/CLI conversation for this activation.
     pub fresh_start: bool,
@@ -1803,6 +1807,8 @@ pub struct LaunchAgent {
     /// Optional for legacy tests/callers; runtime composition wires the shared
     /// project-plugin resolver used by the capability assignment use cases.
     plugin_mcp: Option<Arc<ProjectPluginResolver>>,
+    /// Machine-local preference source, wired only on the human launcher.
+    user_settings: Option<Arc<dyn UserSettingsStore>>,
     /// Explicit intent for structured profiles when structured ports are absent.
     structured_routing_mode: StructuredRoutingMode,
 }
@@ -1855,6 +1861,7 @@ impl LaunchAgent {
             managed_temp_allocator: None,
             managed_temp_releaser: None,
             plugin_mcp: None,
+            user_settings: None,
             structured_routing_mode: StructuredRoutingMode::HumanPtyFallback,
         }
     }
@@ -1866,6 +1873,13 @@ impl LaunchAgent {
         self
     }
 
+    /// Wires machine-local preferences for human-facing launches.
+    #[must_use]
+    pub fn with_user_settings(mut self, settings: Arc<dyn UserSettingsStore>) -> Self {
+        self.user_settings = Some(settings);
+        self
+    }
+
     /// Replaces the default native-skill resolver with the shared effective
     /// resolver used by runtime context injection and `idea_skill_read`.
     #[must_use]
@@ -2279,7 +2293,16 @@ impl LaunchAgent {
                 input.agent_id, profile.id
             )));
         }
+        let preferred_interface = match input.terminal_interface {
+            some @ Some(_) => some,
+            None => match &self.user_settings {
+                Some(settings) => settings.load().await?.default_agent_terminal_interface,
+                None => None,
+            },
+        };
         let wants_structured = input.require_structured
+            || preferred_interface == Some(DefaultAgentTerminalInterface::IdeaCli)
+                && profile.structured_adapter.is_some()
             || matches!(
                 self.structured_routing_mode,
                 StructuredRoutingMode::RequireStructured