feat: add material asset workspace

.planning/phases/009-material-asset-workspace/009-PLAN.md

@@ -0,0 +1,34 @@
+# Phase 9 Plan: Material and Asset Workspace
+
+**Status:** Ready for execution
+**Phase Goal:** Let operators use ontology and teaching asset prompt workflows
+from the web app.
+
+## Tasks
+
+### 1. Add material ingestion UI
+
+- Add title/source/body fields.
+- Call material ingestion API.
+- Show loading and error states.
+
+### 2. Add ontology inspection UI
+
+- Render concept, edge, and gap counts.
+- Show candidate concept labels and review states.
+- Populate asset concept selector.
+
+### 3. Add teaching asset prompt UI
+
+- Generate prompt candidate for selected concept and asset type.
+- Show prompt text, model key, review state, and verification guard.
+
+### 4. Verify
+
+- Update tests for content-operation frontend wiring.
+- Run Go tests, OpenSpec validation, line-count check, and smoke.
+
+## Out of Scope
+
+- Real image generation.
+- Ontology graph editor.