merge: update PR #754 with PR #745

Refs #688

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Author: owjs3901

.changepacks/changepack_log_atom_hoist_names.json

@@ -0,0 +1,11 @@
+{
+  "changes": {
+    "bindings/devup-ui-wasm/package.json": "Patch",
+    "packages/next-plugin/package.json": "Patch",
+    "packages/rsbuild-plugin/package.json": "Patch",
+    "packages/vite-plugin/package.json": "Patch",
+    "packages/webpack-plugin/package.json": "Patch"
+  },
+  "note": "Enable atomHoist by default at two routes in Webpack, Rsbuild and Next Webpack, with numeric zero opting out and no effect in singleCss mode. Keep Vite and Next Turbopack in per-file mode until their shared-slot reservation lands, warning once for explicit positive atomHoist requests. Allocate shared and file-local short counter names through deterministic reserved slots instead of content names; preserve frozen route plans, dynamic !important, local keyframes, first-value responsive tokens, shared CSS updates and persisted placement. Bump the naming cache generation. No new build errors.",
+  "date": "2026-10-01T00:00:00.000Z"
+}

.changepacks/changepack_log_barrel_namespace_imports.json

@@ -0,0 +1,7 @@
+{
+  "changes": {
+    "bindings/devup-ui-wasm/package.json": "Patch"
+  },
+  "note": "A project module re-exporting Devup UI (export { Box, css } from '@devup-ui/react', export * from '@devup-ui/react', export { styled as s }, export * as Devup, a default export of an import, chains of barrels and the compat entry) now works: a file importing Box or css from it compiles exactly as if it imported from the package, following the barrel through the resolver (relative paths, tsconfig paths, package exports), and hasDevupUI sees such a file. Members read from a namespace or default import of the package (Devup['css'], const { css } = Devup, Devup.css as a value) compile where the build can follow them, `Devup.x` for a name the package compiles being read like the named import. New build errors, located at the use: what a barrel re-exports but the build cannot read (an unresolvable `export *` or module, a namespace of modules re-exporting the package) is an error where its name is used instead of a runtime crash, and a namespace member read by a key the build cannot know (Devup[key]), written, or destructured in a form it cannot follow (a rest, a computed key, a default value, a nested pattern, an exported declaration, or members mixed with ones that stay at runtime) is an error that names the members to read. A namespace passed on whole (Object.keys(Devup), spyOn(Devup, 'css'), export default Devup) is left as it is",
+  "date": "2026-10-01T00:00:00.000Z"
+}

.changepacks/changepack_log_build_error_docs.json

@@ -0,0 +1,8 @@
+{
+  "changes": {
+    "packages/eslint-plugin/package.json": "Patch",
+    "packages/react/package.json": "Patch"
+  },
+  "note": "The @devup-ui/react README and the css-utils-literal-only rule docs link their mention of build errors to the new Build Errors reference (https://devup-ui.com/docs/build-errors), which lists the build errors grouped by API; the docs sidebar lists the page after Supported Syntax & Limitations, whose Build errors section links to it. Documentation only: no new build errors",
+  "date": "2026-10-01T00:00:00.000Z"
+}

.changepacks/changepack_log_ci_hardening.json

@@ -0,0 +1,7 @@
+{
+    "changes":  {
+                    "bindings/devup-ui-wasm/package.json":  "Patch"
+                },
+    "note":  "CI and test infrastructure: the workflow always runs the latest releases (the ubuntu-latest runner, the newest major version of every action, and the latest stable Rust, Bun, Node.js, wasm-pack, cargo-binstall, cargo-tarpaulin and changepacks), runs pull requests read-only and moves npm publishing and Pages deployment into jobs that run only on pushes to main, never creates or commits e2e baselines, and sets timeouts. The wasm package build now starts from an empty pkg/ and verify:dist rejects files of the removed lite export, its README describes the real API, state and errors, and a Bun test checks the JS/WASM interface. The README benchmark tables are generated from one checked result file in both languages with the CSS size in its own column.",
+    "date":  "2026-10-01T00:00:00.000Z"
+}

.changepacks/changepack_log_class_names_bindings.json

@@ -0,0 +1,7 @@
+{
+  "changes": {
+    "bindings/devup-ui-wasm/package.json": "Patch"
+  },
+  "note": "Resolve Emotion ClassNames components, callback css/cx APIs and theme reads by lexical binding identity across compilation, numeric preprocessing, imported constants and mutation analysis. Ordinary shadowed callbacks, components and values retain their authored behavior while genuine outer APIs still compile without styling runtime. No new build-error categories.",
+  "date": "2026-10-20T00:00:00.000Z"
+}

.changepacks/changepack_log_compat_imports.json

@@ -0,0 +1,7 @@
+{
+  "changes": {
+    "bindings/devup-ui-wasm/package.json": "Patch"
+  },
+  "note": "Rewriting styled-components, Emotion and vanilla-extract imports keeps type-only imports type-only: `import { type DefaultTheme, ThemeProvider }` now leaves `import type { DefaultTheme }` on the package instead of a value import that made it a runtime dependency, and an `import type` declaration is left as written. `spin.getName()` on a `keyframes()` binding becomes the generated keyframes name instead of a call on a string that threw at runtime",
+  "date": "2026-10-01T00:00:00.000Z"
+}

.changepacks/changepack_log_compat_theme.json

@@ -0,0 +1,8 @@
+{
+  "changes": {
+    "packages/react/package.json": "Patch",
+    "bindings/devup-ui-wasm/package.json": "Patch"
+  },
+  "note": "The styled-components and Emotion compat ThemeProvider now gives its theme through React context: useTheme, withTheme and the new ThemeConsumer return the real theme object (an object merged over the outer theme, or what a theme function makes of it) instead of an empty Proxy of var() references, withTheme forwards refs, lets a caller's theme win and sets a displayName. Styles keep reading the CSS variables the provider declares. styled-components v6.4 createTheme is available from the compat entry, and ThemeConsumer and createTheme imports are redirected there instead of staying a runtime dependency on styled-components",
+  "date": "2026-10-01T00:00:00.000Z"
+}

.changepacks/changepack_log_compose_imported_chains.json

@@ -0,0 +1,7 @@
+{
+  "changes": {
+    "bindings/devup-ui-wasm/package.json": "Patch"
+  },
+  "note": "Resolve native css() definitions composed from known rule objects and css() results through imported module chains. Later declarations replace earlier declarations at the same property, selector, breakpoint and layer, while earlier-only declarations remain. Imported composition chains with cycles, dynamic parts or unresolved imports now produce located build errors instead of silently deferring precedence to stylesheet order.",
+  "date": "2026-10-09T00:00:00.000Z"
+}

.changepacks/changepack_log_compose_stylex.json

@@ -0,0 +1,7 @@
+{
+  "changes": {
+    "bindings/devup-ui-wasm/package.json": "Patch"
+  },
+  "note": "stylex.props() and stylex.attrs() merge namespaces this file creates key by key as StyleX does: a later namespace's key replaces an earlier one's, so props(red, blue) is blue and props(blue, red) is red, and a key set to null removes the earlier value; conditions (cond && styles.x, cond ? a : b) choose per key. Arguments the build cannot read key by key (namespaces from other modules, props, dynamic namespaces, include()) keep the previous joined behavior",
+  "date": "2026-10-01T00:00:00.000Z"
+}

.changepacks/changepack_log_conditional_spread_precedence.json

@@ -0,0 +1,7 @@
+{
+  "changes": {
+    "bindings/devup-ui-wasm/package.json": "Patch"
+  },
+  "note": "Respect source-order property replacement across conditional spreads in styled rule objects, and document that styled callbacks cannot return runtime class names. No new build errors; existing located Cannot compose errors remain unchanged.",
+  "date": "2026-10-01T00:00:00.000Z"
+}