fix(model-servers): autorise les espaces dans le champ Arguments supplémentaires llama.cpp

Le champ contrôlé de ModelServersPanel/FirstRunWizard perdait les
espaces saisis dans les arguments llama.cpp (trim/split prématuré sur
chaque frappe au lieu de la seule sérialisation finale) (#113).

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

frontend/src/features/first-run/FirstRunWizard.test.tsx

@@ -83,6 +83,30 @@ describe("FirstRunWizard (with MockProfileGateway)", () => {
     expect(cmd.value).toBe("codex-2");
   });
 
+  it("keeps args spaces while typing and parses them on blur", async () => {
+    const { profile } = renderWizard();
+    await waitForLoaded();
+    await waitFor(() =>
+      expect(
+        (screen.getByLabelText("use Claude Code") as HTMLInputElement).checked,
+      ).toBe(true),
+    );
+
+    const args = screen.getByLabelText("Claude Code args") as HTMLInputElement;
+    fireEvent.change(args, {
+      target: { value: "--model   claude-sonnet-4-5  --verbose " },
+    });
+    expect(args.value).toBe("--model   claude-sonnet-4-5  --verbose ");
+
+    fireEvent.blur(args);
+    fireEvent.click(screen.getByRole("button", { name: "Save and continue" }));
+
+    await waitFor(async () => {
+      const [saved] = await profile.listProfiles();
+      expect(saved.args).toEqual(["--model", "claude-sonnet-4-5", "--verbose"]);
+    });
+  });
+
   it("detection shows ✓ for claude and ✗ for the rest", async () => {
     renderWizard();
     await waitForLoaded();