W3: lib-knowledge-ui scaffold + collections

@crema/knowledge-ui: headless KB management components over an injected
KnowledgeTransport. This commit: package + types (full API surface) +
transport interface + MockKnowledgeTransport (fixtures for every surface) +
_internal (cn, badges, formatters) + components-collections (CollectionList
grouped by owner, CollectionCard, CollectionForm with org/read-only states) +
demo + README + tsconfig.check.json. Typechecks clean.

Co-Authored-By: Claude Fable 5 (build) <noreply@anthropic.com>

README.md

@@ -0,0 +1,82 @@
+# @crema/knowledge-ui
+
+Management UI for **arcadia-knowledge** — the hosted knowledge base. Ships the
+collection browser, object viewer (card + provenance + supersession + citations),
+claims review queue, and export flow as **pure, headless components**: shapes and
+UI, never data fetching. The app injects a `KnowledgeTransport`; auth stays closed
+over inside it, so components never see a token.
+
+Built to `arcadia-knowledge-ui-spec.md`. Two consumers today: the Knowledge area
+in `arcadia-personal-cloud-web` (me.sky-ai.com) and the standalone
+`skyai-knowledge-web`. Same lib, different shells.
+
+## Install (polyrepo — source alias, not npm)
+
+Like every `@crema/*` lib, this is a path-aliased source folder. A consumer wires
+it in three places:
+
+1. **`vite.config.ts`** — resolve alias:
+   ```ts
+   "@crema/knowledge-ui": libSrc("knowledge-ui") + "/index.tsx",
+   "@crema/knowledge-ui/": libSrc("knowledge-ui") + "/",
+   ```
+   The lib also imports `@crema/file-ui` (for uploads/previews), so alias that too
+   if not already, and make sure `lucide-react` is in your shared-dep dedupe list.
+
+2. **`tsconfig.json`** — paths:
+   ```json
+   "@crema/knowledge-ui": ["../lib-knowledge-ui/src/index.tsx"],
+   "@crema/knowledge-ui/*": ["../lib-knowledge-ui/src/*"]
+   ```
+
+3. **`app/app.css`** — Tailwind source scan:
+   ```css
+   @source "../../lib-knowledge-ui/src";
+   ```
+
+## Wiring the transport
+
+The lib defines `KnowledgeTransport`; the app implements it over its KB client
+(a `kb.ts` factory that closes over the session token and talks to
+arcadia-knowledge `:4025` directly). See `arcadia-knowledge-ui-spec.md` §4.2.
+
+```tsx
+import { CollectionList, type KnowledgeTransport } from "@crema/knowledge-ui";
+
+const transport: KnowledgeTransport = kbTransport(session.token);
+const { collections } = await transport.listCollections();
+
+<CollectionList collections={collections} onOpen={(c) => navigate(`/knowledge/${c.slug}`)} />
+```
+
+For development without a service, use `MockKnowledgeTransport` — it backs
+`demo/knowledge.tsx` with fixtures covering every surface (personal + org
+corpuses, documents, an image, a superseded doc, a vault doc, an open claim
+conflict, a proposed claim, a rejected tombstone, an export job).
+
+## Conventions
+
+- **Tailwind theme tokens only** — no hex. Sensitivity/tier/status/curation
+  colours use `--warning` / `--success` / `--destructive` / `--info` (falls back
+  to `--primary`). Works in any Crema theme.
+- **Props in, callbacks out.** No global state, no context, no fetching.
+- **`data-action` attributes** on interactive elements (command-bus contract).
+- **Trust is surfaced raw** — assertion tier, `card_model`, `extraction_model`
+  are shown as first-class facts, never collapsed into a score.
+
+## Typecheck
+
+```bash
+../arcadia-personal-cloud-web/node_modules/.bin/tsc -p tsconfig.check.json
+```
+(Borrows a consumer's React types; the lib has no node_modules of its own.)
+
+## Surfaces
+
+| Module | Exports |
+|---|---|
+| `components-collections` | `CollectionList`, `CollectionCard`, `CollectionForm` |
+| `components-object` | `ObjectList`, `ObjectViewer`, `CatalogCard`, `ProvenancePanel`, `SupersessionBanner`, `OutlineNav`, `TextReader`, `CitationLink` |
+| `components-claims` | `ClaimsReviewQueue`, `ClaimCard`, `ConflictPair` |
+| `components-export` | `ExportPanel`, `ExportJobRow` |
+| `_internal` (re-exported) | badges + `cn`, `formatBytes`, `formatDate`, `formatRelative`, `renderValue` |