docs: add build-error reference with verified fixes

.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_known_limitations.json

@@ -0,0 +1,7 @@
+{
+  "changes": {
+    "packages/react/package.json": "Patch"
+  },
+  "note": "The README no longer claims every CSS-in-JS pattern compiles: it describes what the build compiles and that anything it cannot know is a CSS variable or a located build error, and links the new Supported Syntax & Limitations page, which lists what compiles, the style override rules (where a later part wins and where the CSS cascade decides), Baseline 2024 browser support, that a component taking the css prop must pass className and style on, the runtime-only APIs and how each is handled, and the known limitations",
+  "date": "2026-10-01T00:00:00.000Z"
+}

README.md

@@ -7,7 +7,7 @@
 </h3>
 
 <p align="center">
-    <strong>Zero Config · Zero FOUC · Zero Runtime · Complete CSS-in-JS Syntax Coverage</strong>
+    <strong>Zero Config · Zero FOUC · Zero Runtime · Build-Time CSS-in-JS</strong>
 </p>
 
 ---
@@ -41,7 +41,7 @@ English | [한국어](README_ko.md)
 
 Traditional CSS-in-JS solutions force you to choose between developer experience and performance. Devup UI eliminates this trade-off entirely by processing all styles at build time using a Rust-powered preprocessor.
 
-- **Complete Syntax Coverage**: Every CSS-in-JS pattern you know — variables, conditionals, responsive arrays, pseudo-selectors — all fully supported
+- **Broad Syntax Coverage**: Variables, conditionals, responsive arrays, pseudo-selectors, `styled()`, Emotion's `css` prop and more compile at build time; anything the build cannot know is a [located build error](https://devup-ui.com/docs/build-errors), never a silent miss ([supported syntax & limitations](https://devup-ui.com/docs/limitations))
 - **Familiar API**: `styled()` API compatible with styled-components and Emotion patterns
 - **True Zero Runtime**: No JavaScript execution for styling at runtime. Period.
 - **Smallest Bundle Size**: Optimized class names (`a`, `b`, ... `aa`, `ab`) minimize CSS output
@@ -137,7 +137,7 @@ const example = <div className="a" style={{ '--a': colorVariable }} />
 // .a { background-color: var(--a); }
 ```
 
-**Complex expressions and responsive arrays — fully supported:**
+**Complex expressions and responsive arrays:**
 
 ```tsx
 // You write:

README_ko.md

@@ -7,7 +7,7 @@
 </h3>
 
 <p align="center">
-    <strong>Zero Config · Zero FOUC · Zero Runtime · 모든 CSS-in-JS 문법 완벽 지원</strong>
+    <strong>Zero Config · Zero FOUC · Zero Runtime · 빌드 타임 CSS-in-JS</strong>
 </p>
 
 ---
@@ -41,7 +41,7 @@
 
 기존 CSS-in-JS 솔루션들은 개발자 경험과 성능 사이에서 타협을 강요했습니다. Devup UI는 Rust 기반 전처리기를 통해 모든 스타일을 빌드 타임에 처리함으로써 이 트레이드오프를 완전히 제거합니다.
 
-- **완전한 문법 지원**: 변수, 조건문, 반응형 배열, 가상 선택자 등 모든 CSS-in-JS 패턴을 완벽하게 지원
+- **폭넓은 문법 지원**: 변수, 조건문, 반응형 배열, 가상 선택자, `styled()`, Emotion `css` prop 등을 빌드 타임에 컴파일합니다. 빌드가 알 수 없는 것은 조용히 빠지지 않고 [위치가 표시된 빌드 오류](https://devup-ui.com/docs/build-errors)가 됩니다 ([지원 문법과 한계](https://devup-ui.com/docs/limitations))
 - **익숙한 API**: styled-components, Emotion과 호환되는 `styled()` API 제공
 - **진정한 제로 런타임**: 런타임에서 스타일링을 위한 JavaScript 실행이 전혀 없습니다
 - **가장 작은 번들 크기**: 최적화된 클래스명(`a`, `b`, ... `aa`, `ab`)으로 CSS 출력 최소화
@@ -137,7 +137,7 @@ const generated = <div className="a" style={{ '--a': colorVariable }} />
 // .a { background-color: var(--a); }
 ```
 
-**복잡한 표현식과 반응형 배열 — 완벽 지원:**
+**복잡한 표현식과 반응형 배열:**
 
 ```tsx
 // 개발자가 작성:

apps/landing/src/app/(detail)/docs/LeftMenu.tsx

@@ -36,6 +36,8 @@ export function LeftMenu() {
         Core Concepts
       </MenuItem>
       <MenuItem to="/docs/features">Features</MenuItem>
+      <MenuItem to="/docs/limitations">Supported Syntax & Limitations</MenuItem>
+      <MenuItem to="/docs/build-errors">Build Errors</MenuItem>
       <MenuItem
         subMenu={[
           {