feat: finalise ticket99 - implémentation agent model configuration v2

- agent/lifecycle.rs: lifecycle management per profile
- agent/provider_catalogue.rs: provider registration with model support
- agent/usecases.rs: usecases for profile-based agent invocation
- agent/mod.rs: expose agent capabilities via AgentManager
- backend/dto.rs: AgentModelConfig, AgentProviderConfig DTOs
- domain/profile.rs: extend Profile avec agent capabilities
- domain/permission.rs: permission checks pour agent access
- infrastructure/assistant/mod.rs: agent integration
- infrastructure/permission/{claude,codex}.rs: permission handlers
- web-server/lib.rs: agent endpoints
- commands.rs: agent commands
- frontend/adapters/{http,profile,mock,domain}.ts: adapters
- frontend/first-run/FirstRunWizard.{test.tsx,tsx}: first-run flow

crates/infrastructure/src/permission/claude.rs

@@ -228,9 +228,6 @@ mod tests {
             project_root: root,
             run_dir,
             model: None,
-            model_provider: None,
-            model_provider_base_url: None,
-            model_provider_env_key: None,
         }
     }
 
@@ -285,9 +282,6 @@ mod tests {
             project_root: "/proj",
             run_dir: "/run",
             model: Some("claude-sonnet-4-5"),
-            model_provider: None,
-            model_provider_base_url: None,
-            model_provider_env_key: None,
         };
         let proj = ClaudePermissionProjector.project(None, None, &ctx);
         assert!(proj.args.is_empty());