feat(agent): menu de profils restreint Claude/Codex + retrait custom (D7) — §17

Dernier lot de §17 : seuls les profils pilotables en mode structuré sont
proposés à la sélection/création.

- domain : AgentProfile::is_selectable() = structured_adapter.is_some(),
  source unique de vérité du prédicat.
- infrastructure : AgentSessionFactory::supports délègue à is_selectable
  (supports et is_selectable ne peuvent plus diverger).
- application : selectable_reference_profiles() = reference_profiles()
  filtré ; ReferenceProfiles et FirstRunState exposent la liste filtrée
  (Claude/Codex). reference_profiles() brut reste à 4 (data intacte) ⇒
  un agent Gemini/Aider/custom legacy déjà configuré continue de tourner.
- frontend : bloc AddCustomProfile retiré du wizard first-run, action
  addCustom retirée du viewmodel ; wizard n'affiche que la liste filtrée.

Tests (QA) : is_selectable (table de vérité), cohérence stricte
is_selectable<->supports, liste exposée=2 / data brute=4, garde
anti-régression Vitest sur l'absence du bloc custom — validées par
mutation. cargo test --workspace : 820 passed. npx vitest run : 344 passed.

§17 COMPLET (D0->D7). Suivi restant : D6b (surfacer reply dans le writer
wire .response.json pour la délégation par protocole fichier).

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

crates/application/src/agent/usecases.rs

@@ -18,7 +18,7 @@ use domain::profile::AgentProfile;
 
 use crate::error::AppError;
 
-use super::catalogue::reference_profiles;
+use super::catalogue::selectable_reference_profiles;
 
 // ---------------------------------------------------------------------------
 // DetectProfiles
@@ -256,11 +256,15 @@ impl ConfigureProfiles {
 /// Output of [`ReferenceProfiles::execute`].
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct ReferenceProfilesOutput {
-    /// The pre-filled, editable reference catalogue.
+    /// The pre-filled, editable reference catalogue, **restricted to the
+    /// selectable profiles** (§17.3, D7): only profiles drivable in structured
+    /// mode are offered to selection/creation. Today: Claude + Codex.
     pub profiles: Vec<AgentProfile>,
 }
 
-/// Exposes the pre-filled reference catalogue (Claude/Codex/Gemini/Aider).
+/// Exposes the **selectable** reference catalogue for the agent-creation menu
+/// (§17.3, D7): the structured-drivable profiles only (Claude/Codex). Gemini and
+/// Aider remain in the raw catalogue data but are not proposed here.
 #[derive(Default)]
 pub struct ReferenceProfiles;
 
@@ -278,7 +282,7 @@ impl ReferenceProfiles {
     #[allow(clippy::unused_async)]
     pub async fn execute(&self) -> Result<ReferenceProfilesOutput, AppError> {
         Ok(ReferenceProfilesOutput {
-            profiles: reference_profiles(),
+            profiles: selectable_reference_profiles(),
         })
     }
 }
@@ -292,7 +296,9 @@ impl ReferenceProfiles {
 pub struct FirstRunStateOutput {
     /// `true` when no `profiles.json` exists yet ⇒ show the first-run wizard.
     pub is_first_run: bool,
-    /// The pre-filled reference catalogue to seed the wizard.
+    /// The pre-filled reference catalogue to seed the wizard, **restricted to the
+    /// selectable profiles** (§17.3, D7): only structured-drivable profiles
+    /// (Claude/Codex) are offered. No custom-profile entry.
     pub reference_profiles: Vec<AgentProfile>,
 }
 
@@ -317,7 +323,7 @@ impl FirstRunState {
         let configured = self.store.is_configured().await?;
         Ok(FirstRunStateOutput {
             is_first_run: !configured,
-            reference_profiles: reference_profiles(),
+            reference_profiles: selectable_reference_profiles(),
         })
     }
 }