feat(ui): profils locaux/LAN OpenAI-compatible dans le first-run et les terminaux (#14)

Câble la surface frontend des profils IA locaux/LAN OpenAI-compatible,
en parité avec l'adapter backend additif (aab4bca).

- domain: types de profil OpenAI-compatible
- first-run: édition/validation du profil dans le FirstRunWizard
- adapters/mock: mock de profil pour les tests
- terminals: rendu des round-trips et erreurs endpoint (role=alert)

Validé QA (frontend GO): typecheck exit 0, vitest 59 fichiers / 566 tests,
0 echec ; couverture timeouts round-trip + erreur endpoint role=alert
prouvees ; pas de regression sur les tests de bail headless.

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

frontend/src/domain/index.ts

@@ -626,6 +626,42 @@ export type ContextInjection =
 /** The four injection strategy discriminants. */
 export type InjectionStrategy = ContextInjection["strategy"];
 
+/**
+ * Structured-execution adapter of a profile (mirror of the backend
+ * `StructuredAdapter`, camelCase wire format). Absent (`structuredAdapter`
+ * omitted) ⇒ the profile is a plain TUI/PTY agent (historical behaviour);
+ * present ⇒ the profile is selectable as a structured AI agent:
+ * - `claude` / `codex`: driven by a spawned CLI binary,
+ * - `openAiCompatible`: driven by IdeA's native HTTP adapter against an
+ *   OpenAI-compatible chat server (Ollama, llama.cpp, a LAN runtime) — see
+ *   {@link HttpChatConfig}.
+ */
+export type StructuredAdapter = "claude" | "codex" | "openAiCompatible";
+
+/**
+ * HTTP configuration of an OpenAI-compatible chat server (mirror of the backend
+ * `HttpChatConfig`, camelCase wire format). Carried by a profile whose
+ * {@link StructuredAdapter} is `openAiCompatible`.
+ *
+ * Transparent by design: secrets are never stored here — `apiKeyEnv` is the
+ * *name* of an environment variable, never the key itself (the backend resolves
+ * it at call time).
+ */
+export interface HttpChatConfig {
+  /** Root or `/chat/completions` endpoint of the HTTP server (http/https). */
+  endpoint: string;
+  /** Model name sent in the `/chat/completions` payload. */
+  model: string;
+  /** Name of the env var holding the API key (optional). Never the key. */
+  apiKeyEnv?: string;
+  /** Per-turn request timeout, in milliseconds. */
+  requestTimeoutMs?: number;
+  /** Connection timeout, in milliseconds. */
+  connectTimeoutMs?: number;
+  /** Tool-calling re-loop guard for one turn (defaults to ~16 backend-side). */
+  maxToolIterations?: number;
+}
+
 /**
  * A declarative AI-CLI profile (mirror of the backend `AgentProfile`). `id` is a
  * UUID string; `detect` is the optional detection command line.
@@ -641,6 +677,19 @@ export interface AgentProfile {
   /** Optional CLI flags for agent-session continuity: `assignFlag` to bind a
    * conversation id at launch, `resumeFlag` to resume an existing conversation. */
   session?: { assignFlag?: string; resumeFlag: string };
+  /**
+   * Structured-execution adapter (mirror of the backend `structured_adapter`,
+   * `skip_serializing_if = Option::is_none`). Absent ⇒ plain TUI/PTY profile;
+   * present ⇒ selectable structured AI agent. Additive: existing Claude/Codex
+   * profiles are unaffected.
+   */
+  structuredAdapter?: StructuredAdapter;
+  /**
+   * HTTP config for a `openAiCompatible` structured adapter (mirror of the
+   * backend `chat_http`, `skip_serializing_if = Option::is_none`). Absent for
+   * every historical profile and every non-HTTP adapter.
+   */
+  chatHttp?: HttpChatConfig;
 }
 
 /** Availability of a candidate profile after detection (mirror of the DTO). */