feat: add material asset workspace

.planning/STATE.md

@@ -7,7 +7,7 @@ See: `.planning/PROJECT.md` (updated 2026-04-26)
 **Core value:** The user should feel and prove that they are becoming more
 interview-ready after each short practice loop.
 
-**Current focus:** Phase 9 planning: Material and Asset Workspace.
+**Current focus:** v2 Frontend MVP implemented; ready for milestone audit.
 
 ## Current Decisions
 
@@ -39,10 +39,11 @@ interview-ready after each short practice loop.
   usable web service.
 - Phase 7 web app shell and diagnostic start UI is implemented and verified.
 - Phase 8 learning progress view is implemented and verified.
+- Phase 9 material and asset workspace is implemented and verified.
 
 ## Next Actions
 
-1. Plan and execute Phase 9: Material and Asset Workspace.
+1. Run a v2 Frontend MVP milestone audit.
 2. Verify the production OpenAI image model identifier before real image
    generation calls.
 3. Add standardized SUMMARY frontmatter or Nyquist validation files if future
@@ -84,6 +85,10 @@ interview-ready after each short practice loop.
 - 2026-04-26: Phase 8 implementation verified with `go test ./...`, OpenSpec
   validation, app script smoke, and learner memory/readiness/next-challenge API
   smoke after an answer.
+- 2026-04-26: Phase 9 implementation verified with `go test ./...`, OpenSpec
+  validation, app script smoke, and material/ontology/teaching-asset API smoke.
+  Chrome DevTools MCP browser screenshot attempt timed out and remains a
+  verification follow-up.
 
 ---
 *State initialized: 2026-04-26.*