Next.js v16.5.0-canary.35 — Release Notes & Engineering Impact

### Core Changes - Handle cancellation errors during response clone cleanup: #100961 - Revert "Revert "Fix App Router locale path matching with Pages i18n"": #98726 - Fix prerendering of caught `'use cache'` errors: #100956 ### Misc Changes - docs: clarify blocking route response status: #100191 - docs: note per-route cost of boundary files, cached Route Handler checks, and per-instance rate limits: #100985 - docs: clarify unstable_cache cross-deployment persistence: #100983 - eval: allow static headings in prefetch-stage results: #100984 - turbopack: only add the Pages client entry when Pages routes exist: #100896 - turbopack: drop ASTs of tree-shaken modules: #100871 - [test] Cover cache reuse after failed handler writes: #100976 - Bundle Analyzer Agent Skill: Add Lodash deduplication eval: #99180 - Bundle Analyzer Agent Skill: Add server Markdown eval: #99179 - Bundle Analyzer Agent Skill: Add browser initial-load eval: #99178 - Turbopack: use memchr3 for source position scanning and count astral chars as two UTF-16 columns: #100919 - test: properly gate some cache-component tests: #100828 - next-napi-bindings: keep issue-backed client update errors recoverable: #100924 - turbopack: report chunk group consistency errors instead of panicking: #100923 - [test] Cover cache handler validation during concurrent reads: #100908 ### Credits Huge thanks to @aurorascharff, @icyJoseph, @lukesandberg, @unstubbable, @wbinnssmith, @mischnic, @smaeda-ks, @sokra, and @timneutkens for helping!