fix(ADR-0046): enable Tailwind typography so Markdown docs render styled (#1687)

plugin-markdown's MarkdownImpl renders Markdown inside
`prose prose-h1:text-3xl prose-h2:text-2xl …`, but the console never registered
@tailwindcss/typography — so every `prose` utility was a no-op. Result: the
/docs/<name> viewer rendered its `# Heading` at body text size with no list
markers or spacing (looked unstyled / "title not showing").

Register the plugin in index.css (`@plugin '@tailwindcss/typography'`) and add
the devDependency. Verified live: doc h1 now renders 30px/600 (was body-sized),
paragraphs/inline-code/links styled with proper hierarchy.

Co-authored-by: Jack Zhuang <277994282+os-zhuang@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: 3 people

.changeset/adr-0046-docs-markdown-typography.md

@@ -0,0 +1,13 @@
+---
+"@object-ui/console": patch
+---
+
+fix(ADR-0046): enable Tailwind typography so Markdown docs render styled.
+
+`plugin-markdown`'s `MarkdownImpl` renders inside `prose prose-h1:text-3xl …`,
+but the console never registered `@tailwindcss/typography`, so every `prose`
+utility was a no-op — Markdown rendered with no heading sizes, list markers, or
+spacing (the `/docs/<name>` page showed its `# Title` at body size, looking
+unstyled). Register the plugin (`@plugin '@tailwindcss/typography'`) and add the
+dependency. Now doc headings, paragraphs, inline code, and links render with
+proper hierarchy.

apps/console/package.json

@@ -89,6 +89,7 @@
     "@objectstack/client": "^9.0.0",
     "@objectstack/spec": "^9.1.0",
     "@tailwindcss/postcss": "^4.3.0",
+    "@tailwindcss/typography": "^0.5.20",
     "@testing-library/jest-dom": "^6.9.1",
     "@testing-library/react": "^16.3.2",
     "@testing-library/user-event": "^14.6.1",

apps/console/src/index.css

@@ -1,6 +1,13 @@
 @import 'tailwindcss';
 @import '@object-ui/app-shell/styles.css';
 
+/* Typography plugin — generates the `prose` utilities. plugin-markdown's
+   MarkdownImpl renders docs/markdown inside `prose prose-h1:text-3xl …`;
+   without this plugin those classes are no-ops and Markdown renders with
+   NO heading sizes, list markers, or spacing (ADR-0046 docs looked unstyled
+   — headings indistinguishable from body text). */
+@plugin '@tailwindcss/typography';
+
 /* Scan sources for Tailwind classes */
 @source '../src/**/*.{ts,tsx}';
 @source '../../../packages/app-shell/src/**/*.{ts,tsx}';