devtools-ui 0.7.0 breaks SSR boot with solid-js <=1.9.12: `use` is not exported by solid-js/web server build

TanStack Devtools version

@tanstack/devtools 0.14.0 / @tanstack/devtools-ui 0.7.0 (still present in 0.14.1 / 0.7.1, the latest at time of filing)

Framework/Library version

TanStack Start (@tanstack/react-start 1.168.x) + Vite 8 (rolldown) + @cloudflare/vite-plugin, solid-js 1.9.12 in the lockfile

Describe the bug

Upgrading @tanstack/devtools 0.13.0 → 0.14.0 (which bumps the bundled @tanstack/devtools-ui 0.6.0 → 0.7.0) makes vite dev fail to boot in any app whose SSR environment processes devtools, when the resolved solid-js is ≤ 1.9.12:

Error: Error during dependency optimization:

[MISSING_EXPORT] "use" is not exported by "node_modules/solid-js/web/dist/server.js".
   ╭─[ node_modules/@tanstack/devtools/node_modules/@tanstack/devtools-ui/dist/esm/components/theme.js:2:45 ]
   │
 2 │ import { createComponent, insert, template, use } from "solid-js/web";
   │                                             ─┬─
   │                                              ╰─── Missing export

The dev server never starts, which also takes down every Playwright run driven by vite dev.

Root cause

• @tanstack/devtools-ui 0.7.0 (PR #492, commit a46d1f5) wrapped ThemeContextProvider's children in <span style="display:contents" ref={setContainer}> so it can call ensureDevtoolsStyles(element.ownerDocument) (src/components/theme.tsx). The Solid compiler emits that ref as use(setContainer, _el$), so the published ESM (dist/esm/components/theme.js) now imports use from solid-js/web. In 0.6.0 that file imported only createComponent.
• Under the node/SSR export condition, solid-js/web resolves to web/dist/server.js. That server build exported no use at all through solid-js 1.9.12; solid-js 1.9.13 (2026-05-15) added it as a notSup stub (notSup as use).
• @tanstack/devtools-ui declares solid-js: >=1.9.7 (and @tanstack/devtools depends on ^1.9.9), so resolvers happily keep ≤ 1.9.12 in existing lockfiles — a lockfile that worked with devtools 0.13.0 hard-fails right after the bump.

Client-only setups never hit it (the browser build has always exported use), which is presumably why it shipped unnoticed. It surfaces wherever the SSR side bundles or import-validates devtools — e.g. TanStack Start with rolldown-vite's SSR dependency optimizer.

Steps to reproduce

1. Lockfile with solid-js@1.9.12 (any version ≥1.9.7 and ≤1.9.12 works) and @tanstack/devtools@0.14.x.
2. Import devtools in an app whose Vite SSR environment processes it (TanStack Start default setup is enough).
3. vite dev → MISSING_EXPORT "use" during SSR dependency optimization.

Or minimally, in any Node ESM context resolving the server condition:

import { use } from 'solid-js/web'; // solid-js@1.9.12, server condition → SyntaxError/MISSING_EXPORT

Suggested fix

Raise the solid-js floor to ^1.9.13 in @tanstack/devtools-ui's (and @tanstack/devtools's) dependency ranges, so resolvers pull a solid-js whose server build has the use stub. Alternatively avoid the ref → use emission in output that gets loaded under the server condition.

Workaround for affected users: force-dedupe solid-js to ≥ 1.9.13 (we removed the stale nested resolutions from the lockfile so a single hoisted 1.9.15 serves everything; that fixes the boot).

Bắt đầu với src/components/theme.tsx và tái hiện lỗi tối ưu hóa dependency của SSR bằng solid-js 1.9.12 cùng import tối thiểu cho điều kiện server được mô tả trong issue. Giải quyết vấn đề tương thích của package đã phát hành, sau đó xác minh rằng vite dev khởi động với một thiết lập SSR sử dụng khoảng dependency bị ảnh hưởng và lỗi missing-export không còn xảy ra.