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fix(runtime): notifications 域尾斜杠正则 polynomial-redos 修复（#3507 暴露的 CodeQL high） - #3510
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…ions domain (CodeQL high from #3507) The extraction PR moved the legacy `.replace(/\/+$/, '')` verbatim into domains/notifications.ts, which made it "changed code" and surfaced a js/polynomial-redos CodeQL alert that the line had latently carried since ADR-0030. Fix is the same split+filter treatment the security domain already uses for the identical pattern (its comment even cites the rule). Side effect: redundant slashes collapse ('//read//' → 'read'), consistent with the security domain; locked by a new test. Verified: seam suite 19 tests, runtime 624 green, DTS build green. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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📓 Docs Drift CheckThis PR changes 1 package(s): 17 hand-written doc(s) reference the affected code and may need an implementation-accuracy re-verification:
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背景
#3507 把 handleNotification 体逐字搬进
domains/notifications.ts，搬迁让这行成为"changed code"，CodeQL 首次扫到path.replace(/\/+$/, '')的js/polynomial-redos（high）——该模式自 ADR-0030 就潜伏在原方法里，security 域的同款早已被拦并改为 split+filter（注释里就引用了这条规则），notifications 一直漏网。修复
照 security 域先例：
path.split('/').filter(Boolean).join('/')——不再对请求可控输入跑带量词回溯的正则。语义微差：子路径中的冗余斜杠折叠（//read//→read），与 security 域一致、方向更宽容，新增测试锁定。验证
接缝套件 19 测试、runtime 全量 624 绿、DTS build 绿。
关联 #2462 / #3507。
🤖 Generated with Claude Code