feat(frontend): support des providers OpenCode cloud (#92)

Ajoute l'UI de configuration des providers OpenCode cloud dans le wizard
first-run (sélection, édition, sauvegarde, suppression), le domaine et
les ports associés, ainsi que les adapters HTTP/mock correspondants.

Build + 952 tests verts, comportements clés vérifiés en exécution réelle,
y compris un test de couverture ajouté pour le parcours d'édition.

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

frontend/src/adapters/profile.ts

@@ -8,8 +8,17 @@
 
 import { invoke } from "@tauri-apps/api/core";
 
-import type { AgentProfile, FirstRunState, ProfileAvailability } from "@/domain";
-import type { CloneOpenCodeProfileFromSeedInput, ProfileGateway } from "@/ports";
+import type {
+  AgentProfile,
+  FirstRunState,
+  OpenCodeProviderCatalogEntry,
+  ProfileAvailability,
+} from "@/domain";
+import type {
+  CloneOpenCodeProfileFromSeedInput,
+  ProfileGateway,
+  SaveOpenCodeProviderProfileInput,
+} from "@/ports";
 
 export class TauriProfileGateway implements ProfileGateway {
   firstRunState(): Promise<FirstRunState> {
@@ -51,4 +60,21 @@ export class TauriProfileGateway implements ProfileGateway {
       request: { name: input.name, opencode: input.opencode },
     });
   }
+
+  listOpenCodeProviders(): Promise<OpenCodeProviderCatalogEntry[]> {
+    return invoke<OpenCodeProviderCatalogEntry[]>("list_opencode_providers");
+  }
+
+  saveOpenCodeProviderProfile(
+    input: SaveOpenCodeProviderProfileInput,
+  ): Promise<AgentProfile> {
+    return invoke<AgentProfile>("save_opencode_provider_profile", {
+      request: {
+        profile: input.profile,
+        providerId: input.providerId,
+        model: input.model,
+        apiKey: input.apiKey,
+      },
+    });
+  }
 }