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/app-tauri/src/lib.rs

@@ -255,10 +255,6 @@ pub fn run() {
             commands::save_profile,
             commands::save_opencode_provider_profile,
             commands::list_opencode_providers,
-            commands::save_codex_provider_profile,
-            commands::list_codex_providers,
-            commands::save_claude_provider_profile,
-            commands::list_claude_providers,
             commands::clone_opencode_profile_from_seed,
             commands::delete_profile,
             commands::configure_profiles,