studio: StudioDesignSurface.tsx is 5,547 lines holding three pillars, nav and inspectors — split it #11805

Filing gate ② — a product decision only the maintainer can make.

Who acts on it: objectui triage → the Studio / app-shell owner. ⛔ Not a claim. Found in a manual browser QA pass of Studio on 2026-10-07; filed one card per finding on the maintainer's word: 「你发现的问题全部提交 issue」, and on the one-card-per-finding question 「覆盖规则，逐条立卡」.

Maintainer quick-read

StudioDesignSurface.tsx is 5,547 lines: three pillars, the nav tree, inspectors and their save loops in one file. Several cards from this pass (nav surface keying, nav placeholder cleanup, inspector leaking across tabs) live in it. Split it?

Options

• A — one module per pillar plus shared nav/inspector modules, behaviour-preserving.
• B — extract only the nav pieces touched by the open cards.
• C — status quo.

Environment

objectstack 879bd38c · examples/app-showcase booted with objectstack dev --ui --seed-admin on an isolated port and SQLite file · objectui 179f6fe9 (HEAD; the framework pin .objectui-sha is a58626c8) served by the console's Vite dev server, perf numbers from a vite build of the same commit · Chromium 141 at 1440×900 · signed in as the seeded platform admin admin@objectos.ai unless stated.

Duplicate check

• Semantic issue search on objectstack-ai/objectui (open and closed), StudioDesignSurface split refactor large file: 1 hits (0 open, 1 closed).
• No hit describes this defect.
• Positive control in the same run: related lists action id refusal notice shown to end users on objectstack-ai/objectui returned related lists: an action id the related object does not define draws a refusal notice above the list for whoever opens the record — an authoring fault shown to end users; scope it to authors/admins #11768: yes.

Dedupe words: StudioDesignSurface split refactor large file

Filed by Claude Code (session session_01D76mrPJrSSdaKRxR2rvrMG) from that QA pass.

Generated by Claude Code