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/mock/index.ts

@@ -34,6 +34,7 @@ import type {
   MemoryType,
   McpToolCatalogue,
   McpToolPolicy,
+  OpenCodeProviderCatalogEntry,
   EffectivePermissions,
   PairedDevice,
   PairingCode,
@@ -99,6 +100,7 @@ import type {
   ReattachResult,
   RemoteGateway,
   ReviewPluginPackageInput,
+  SaveOpenCodeProviderProfileInput,
   SkillGateway,
   StoppedLiveAgent,
   SystemGateway,
@@ -1272,6 +1274,20 @@ export const MOCK_REFERENCE_PROFILES: AgentProfile[] = [
   },
 ];
 
+/** Static mock catalogue mirroring the backend OpenCode cloud-provider list. */
+const MOCK_OPENCODE_PROVIDERS: OpenCodeProviderCatalogEntry[] = [
+  {
+    providerId: "anthropic",
+    displayName: "Anthropic",
+    models: ["claude-sonnet-5", "claude-opus-4-8", "claude-haiku-4-5"],
+  },
+  {
+    providerId: "openrouter",
+    displayName: "OpenRouter",
+    models: ["openrouter/auto", "qwen/qwen3-coder"],
+  },
+];
+
 /**
  * In-memory profiles gateway. Tracks configured profiles and a first-run flag so
  * the wizard can be driven and tested fully offline. By default it reports the
@@ -1342,6 +1358,30 @@ export class MockProfileGateway implements ProfileGateway {
       opencode: input.opencode ?? seed.opencode,
     });
   }
+
+  async listOpenCodeProviders(): Promise<OpenCodeProviderCatalogEntry[]> {
+    return structuredClone(MOCK_OPENCODE_PROVIDERS);
+  }
+
+  async saveOpenCodeProviderProfile(
+    input: SaveOpenCodeProviderProfileInput,
+  ): Promise<AgentProfile> {
+    const saved: AgentProfile = {
+      ...structuredClone(input.profile),
+      opencode: undefined,
+      opencodeProvider: {
+        providerId: input.providerId,
+        model: input.model,
+        // The mock never seals a real secret; the ref is opaque either way.
+        apiKeyRef: `mock-secret-${input.profile.id}`,
+      },
+    };
+    const i = this.profiles.findIndex((p) => p.id === saved.id);
+    if (i >= 0) this.profiles[i] = saved;
+    else this.profiles.push(saved);
+    this.configured = true;
+    return structuredClone(saved);
+  }
 }
 
 /**