Thinking: accept extra-high alias and sync Codex FAQ wording

src/auto-reply/thinking.test.ts

@@ -15,6 +15,11 @@ describe("normalizeThinkLevel", () => {
     expect(normalizeThinkLevel("xhigh")).toBe("xhigh");
   });
 
+  it("accepts extra-high aliases as xhigh", () => {
+    expect(normalizeThinkLevel("extra-high")).toBe("xhigh");
+    expect(normalizeThinkLevel("extra high")).toBe("xhigh");
+  });
+
   it("accepts on as low", () => {
     expect(normalizeThinkLevel("on")).toBe("low");
   });

src/auto-reply/thinking.ts

@@ -40,7 +40,11 @@ export function normalizeThinkLevel(raw?: string | null): ThinkLevel | undefined
   if (!raw) {
     return undefined;
   }
-  const key = raw.toLowerCase();
+  const key = raw.trim().toLowerCase();
+  const collapsed = key.replace(/[\s_-]+/g, "");
+  if (collapsed === "xhigh" || collapsed === "extrahigh") {
+    return "xhigh";
+  }
   if (["off"].includes(key)) {
     return "off";
   }
@@ -61,9 +65,6 @@ export function normalizeThinkLevel(raw?: string | null): ThinkLevel | undefined
   ) {
     return "high";
   }
-  if (["xhigh", "x-high", "x_high"].includes(key)) {
-    return "xhigh";
-  }
   if (["think"].includes(key)) {
     return "minimal";
   }