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>

frontend/src/adapters/mock/index.ts

@@ -1160,7 +1160,13 @@ class MockRemoteGateway implements RemoteGateway {
   async connect(): Promise<void> {}
 }
 
-/** The pre-filled reference catalogue the mock serves (mirror of the backend). */
+/**
+ * The pre-filled reference catalogue the mock serves — mirror of the backend's
+ * **selectable** catalogue (§17.3/D7): only profiles drivable in structured mode
+ * (Claude + Codex) are offered to selection/creation. Gemini/Aider stay in the
+ * backend's raw catalogue data but are filtered out of the selection path, so the
+ * mock must not serve them either.
+ */
 export const MOCK_REFERENCE_PROFILES: AgentProfile[] = [
   {
     id: "mock-claude",
@@ -1180,24 +1186,6 @@ export const MOCK_REFERENCE_PROFILES: AgentProfile[] = [
     detect: "codex --version",
     cwdTemplate: "{projectRoot}",
   },
-  {
-    id: "mock-gemini",
-    name: "Gemini CLI",
-    command: "gemini",
-    args: [],
-    contextInjection: { strategy: "conventionFile", target: "GEMINI.md" },
-    detect: "gemini --version",
-    cwdTemplate: "{projectRoot}",
-  },
-  {
-    id: "mock-aider",
-    name: "Aider",
-    command: "aider",
-    args: [],
-    contextInjection: { strategy: "flag", flag: "--message-file {path}" },
-    detect: "aider --version",
-    cwdTemplate: "{projectRoot}",
-  },
 ];
 
 /**

frontend/src/adapters/mock/profile.test.ts

@@ -21,15 +21,15 @@ function customProfile(id: string, command: string): AgentProfile {
 }
 
 describe("MockProfileGateway", () => {
-  it("firstRunState is first-run with the four reference profiles", async () => {
+  it("firstRunState is first-run with only the selectable reference profiles", async () => {
+    // §17.3/D7: only structured-drivable profiles (Claude/Codex) are offered;
+    // Gemini/Aider are filtered out of the selection path server-side.
     const gw = new MockProfileGateway();
     const state = await gw.firstRunState();
     expect(state.isFirstRun).toBe(true);
     expect(state.referenceProfiles.map((p) => p.command)).toEqual([
       "claude",
       "codex",
-      "gemini",
-      "aider",
     ]);
   });
 
@@ -51,8 +51,6 @@ describe("MockProfileGateway", () => {
     expect(byCommand).toEqual({
       claude: true,
       codex: false,
-      gemini: false,
-      aider: false,
     });
   });