feat(model-server): frontend modèles locaux — badge de statut & CRUD serveurs (#35) et wizard multi-profils OpenCode (#36)

Sprint « Modeles locaux », couche frontend.

#35 :
- F35.1 badge de statut de lancement du serveur local
  (ModelServerLaunchBadge + useAgentsModelServer).
- F35.2 feature model-servers : CRUD (ModelServersPanel / useModelServers /
  gateway modelServer) et ModelServerSelect.

#36 :
- Liste multi-profils OpenCode dans le wizard de premier lancement,
  gateway de clonage (clone_opencode_profile_from_seed).

Tests verts (exécution réelle) : tsc propre, vitest 608/608.

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

frontend/src/features/model-servers/index.ts

@@ -0,0 +1,19 @@
+/**
+ * Local model servers feature — public surface (F35.2).
+ */
+
+export { useModelServers } from "./useModelServers";
+export type { ModelServersViewModel } from "./useModelServers";
+export { ModelServersPanel } from "./ModelServersPanel";
+export type { ModelServersPanelProps } from "./ModelServersPanel";
+export { ModelServerSelect } from "./ModelServerSelect";
+export type { ModelServerSelectProps } from "./ModelServerSelect";
+export {
+  emptyModelServer,
+  newModelServerId,
+  validateModelServer,
+  isModelServerValid,
+  isAbsolutePath,
+  parseArgs,
+  type ModelServerErrors,
+} from "./modelServer";