feat(agent): backend hot-swap profil (A0+A1) + inventaire reprise session (B1) — L15

Cadrage Architecture §15 (figé) : « agent = entité à session persistante ».

- A0 (domaine) : Agent::with_profile, LayoutTree::leaf, event AgentProfileChanged
  (+ DTO miroir DomainEventDto camelCase).
- A1 (application) : use case ChangeAgentProfile — no-op si profil identique,
  mutation manifeste, nettoyage conversation_id/agent_was_running sur layouts
  persistés, swap à chaud (kill PTY + relance même cellule via composition de
  LaunchAgent), event AgentProfileChanged. Décision : repartir à neuf (on garde
  .md + mémoire, on jette l'historique de conversation).
- B1 (application) : use case ListResumableAgents (lecture seule) — inventaire des
  cellules was_running||conversation_id, resume_supported selon profil, best-effort.

Aucun nouveau port/adapter (composition de l'existant). Hexagonal strict.
Tests : domaine 11 + app-tauri dto + ChangeAgentProfile 9 + ListResumableAgents 8,
suite application complète verte (0 régression).

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

crates/application/src/lib.rs

@@ -27,14 +27,16 @@ pub mod terminal;
 pub mod window;
 
 pub use agent::{
-    reference_profile_id, reference_profiles, ConfigureProfiles, ConfigureProfilesInput,
+    reference_profile_id, reference_profiles, ChangeAgentProfile, ChangeAgentProfileInput,
+    ChangeAgentProfileOutput, ConfigureProfiles, ConfigureProfilesInput,
     ConfigureProfilesOutput, CreateAgentFromScratch, CreateAgentInput, CreateAgentOutput,
     DeleteAgent, DeleteAgentInput, DeleteProfile, DeleteProfileInput, DetectProfiles,
     DetectProfilesInput, DetectProfilesOutput, FirstRunState, FirstRunStateOutput,
     InspectConversation, InspectConversationInput, InspectConversationOutput, LaunchAgent,
     LaunchAgentInput, LaunchAgentOutput, ListAgents, ListAgentsInput, ListAgentsOutput,
-    ListProfiles, ListProfilesOutput, ProfileAvailability, ReadAgentContext, ReadAgentContextInput,
-    ReadAgentContextOutput, ReferenceProfiles, ReferenceProfilesOutput, SaveProfile,
+    ListProfiles, ListProfilesOutput, ListResumableAgents, ListResumableAgentsInput,
+    ListResumableAgentsOutput, ProfileAvailability, ReadAgentContext, ReadAgentContextInput,
+    ReadAgentContextOutput, ReferenceProfiles, ReferenceProfilesOutput, ResumableAgent, SaveProfile,
     SaveProfileInput, SaveProfileOutput, UpdateAgentContext, UpdateAgentContextInput,
     AGENT_MEMORY_RECALL_BUDGET,
 };