feat: implémentation et QA ticket99 - agent model configuration v2

- backend A-C: VO Codex/Claude, renderers/projecteurs modèle, SecretRef/env, catalogues/use cases/Tauri commands
- frontend D: profils Codex/Claude provider->model->secret, validations, conservation SecretRef
- fix: app-tauri embedded_server isolant IDEA_WEB_ROOT

QA: backend 57/57 tests, frontend 74/74 tests OK

crates/app-tauri/src/lib.rs

@@ -255,6 +255,10 @@ 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,