async function peekFirstChunk(stream) {
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How to watch Samsung Unpacked 2026 - and what to expect
An exit from Soldier Field could lead the Bears across state lines. But it could help revive a once thriving area and the team would still be in most fans’ orbit
代码要点：倒序遍历，先算右侧再推左侧；栈内维护「右侧候选更大值」，单调递增（栈顶最小）。