feat(harness): manifest provider/model/thinking/name + session new options (BE-6/7)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

harness/tht/cli/session_cmd.py

@@ -67,13 +67,22 @@ def list_cmd(
 @session_app.command("new")
 def new_cmd(
     question: str = typer.Argument(..., help="La domanda in linguaggio naturale."),
+    provider: str = typer.Option(None, "--provider", help="Provider LLM (es. zai, anthropic)."),
+    model: str = typer.Option(None, "--model", help="Modello LLM (es. glm-5.2)."),
+    thinking: str = typer.Option(None, "--thinking", help="Livello di thinking (es. medium)."),
+    name: str = typer.Option(None, "--name", help="Nome descrittivo della sessione."),
+    json_out: bool = typer.Option(False, "--json", help="Emetti JSON puro {\"id\": ...} su stdout."),
     config: Path = CONFIG_OPT,
 ) -> None:
     """Crea una sessione e stampa il suo id (ultima riga dell'output)."""
     from tht.session.store import create_session
 
     cfg = _load_config_or_exit(config)
-    manifest = create_session(question, cfg.database, cfg.paths.sessions)
+    manifest = create_session(question, cfg.database, cfg.paths.sessions,
+                              provider=provider, model=model, thinking=thinking, name=name)
+    if json_out:
+        typer.echo(json.dumps({"id": manifest.id}, ensure_ascii=False))
+        return
     typer.secho(f"OK: sessione creata in {session_dir(cfg, manifest.id)}", fg=typer.colors.GREEN)
     typer.echo(manifest.id)