Fix oxlint failures in qualifying-bracket-scoring test

- Replace Array#sort() with Array#toSorted() (unicorn/no-array-sort).
- Remove non-null assertions (typescript-eslint/no-non-null-assertion) by
  asserting the returned state objects directly.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QVLqaYGXCeSYYqTHZmbRZi

app/models/__tests__/qualifying-bracket-scoring.test.ts

@@ -142,7 +142,7 @@ describe("deriveBracketQualifyingStates (simple_8)", () => {
   it("is idempotent — same matches yield the same states", () => {
     const a = states([...QF_ALL, ...SF_ALL]);
     const b = states([...QF_ALL, ...SF_ALL]);
-    expect([...a.entries()].sort()).toEqual([...b.entries()].sort());
+    expect([...a.entries()].toSorted()).toEqual([...b.entries()].toSorted());
   });
 });
 
@@ -163,10 +163,10 @@ describe("guaranteed-minimum QP per outcome (default config)", () => {
 
   it("end-to-end: a QF win immediately yields a 9 QP floor", () => {
     const s = states(QF_ALL);
-    const winner = s.get("t1")!;
-    expect(qpFor(winner.placement, winner.tieCount)).toBeCloseTo(9);
-    const loser = s.get("t8")!;
-    expect(qpFor(loser.placement, loser.tieCount)).toBeCloseTo(4);
+    expect(s.get("t1")).toEqual({ placement: 3, tieCount: 2 });
+    expect(qpFor(3, 2)).toBeCloseTo(9);
+    expect(s.get("t8")).toEqual({ placement: 5, tieCount: 4 });
+    expect(qpFor(5, 4)).toBeCloseTo(4);
   });
 });
 
@@ -175,12 +175,11 @@ describe("guaranteed-minimum QP per outcome (default config)", () => {
 describe("structural tie span vs. live-count regrouping", () => {
   it("4 QF winners share placement 3 but each keeps the 2-slot (9 QP) floor", () => {
     const s = states(QF_ALL);
-    const winners = ["t1", "t2", "t3", "t4"].map((id) => s.get(id)!);
-    // All four sit at placement 3, but with the STRUCTURAL tie span of 2.
-    for (const w of winners) {
-      expect(w).toEqual({ placement: 3, tieCount: 2 });
-      expect(qpFor(w.placement, w.tieCount)).toBeCloseTo(9);
+    // All four QF winners sit at placement 3, but with the STRUCTURAL tie span of 2.
+    for (const id of ["t1", "t2", "t3", "t4"]) {
+      expect(s.get(id)).toEqual({ placement: 3, tieCount: 2 });
     }
+    expect(qpFor(3, 2)).toBeCloseTo(9);
     // A naive regroup by LIVE count (4 rows at placement 3) would average over
     // slots 3–6 and wrongly yield 7 QP — the bug processQualifyingEvent must avoid
     // by delegating bracket events to the structural-tieCount path.