fix(model): 支持不设置推理强度

frontend/src/state/modelAdapterReasoning.test.js

@@ -0,0 +1,20 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import {
+  normalizeReasoningEffort,
+  SUPPORTED_REASONING_EFFORTS,
+} from "./modelAdapterReasoning.js";
+
+test("normalizeReasoningEffort preserves blank and supported values", () => {
+  assert.equal(normalizeReasoningEffort(""), "");
+  assert.equal(normalizeReasoningEffort(" HIGH "), "high");
+  assert.equal(SUPPORTED_REASONING_EFFORTS.has(normalizeReasoningEffort("max")), true);
+});
+
+test("normalizeReasoningEffort preserves unknown values for validation", () => {
+  const normalized = normalizeReasoningEffort(" Unsupported ");
+
+  assert.equal(normalized, "unsupported");
+  assert.equal(SUPPORTED_REASONING_EFFORTS.has(normalized), false);
+});