chs: re-add drifted files

dot_agents/dot_skill-lock.json

dot_agents/skills/blume-migrate/references/docusaurus.md

@@ -41,7 +41,7 @@ Every Docusaurus repo serves **`static/`** at the site root (`static/img/foo.png
 ## Navigation: `sidebars.js` + `_category_.json`
 
 - **Autogenerated sidebar** (`{ type: 'autogenerated', dirName: '...' }`) → Blume's default filesystem navigation. Docusaurus strips numeric prefixes (`01-`) exactly like Blume, so the convention round-trips; no config needed.
-- **Explicit sidebar** (arrays of doc IDs, categories, links) → restructure into folders where possible; use `navigation.sidebar` only for shapes files can't express. A category `{ type: 'category', label, items }` → a folder (label → `meta.ts` `title`); `collapsed` → `meta.ts` `collapsed` (**no `display` field in `meta.ts`** — if collapse matters, set the global `navigation.sidebar.display: "group"` once in config).
+- **Explicit sidebar** (arrays of doc IDs, categories, links) → restructure into folders where possible; use `navigation.sidebar` only for shapes files can't express. A category `{ type: 'category', label, items }` → a folder (label → `meta.ts` `title`); `collapsed` → `meta.ts` `collapsed`, and collapsible rendering → that folder's `meta.ts` `display: "group"` (or `navigation.sidebar.display: "group"` once in config when every category collapses).
 - **`_category_.json`** (also `.yml`) (`{ label, position, collapsed, collapsible, link, className, customProps }`) → a folder `meta.ts`: `label`→`title`, `position`→`order`, `collapsed`→`collapsed`. `link.type: 'generated-index'` → an `index` page in the folder — **and the old URL was `/docs/category/<slug>`**, so add a redirect and rewrite inbound links. `link.type: 'doc'` → make that doc the folder's `index`. `collapsible`/`className`/`customProps` → drop (report).
 - **`src/pages/` — inventory, don't nuke.** Nearly every repo has a React landing page (`src/pages/index.tsx`) and often extra Markdown pages. Markdown pages → content pages; the React home page → rebuild as a docs index or a custom `.astro` page under `content.pages` — report either way.