Test Report — Issues #7 & #8 Fix

Date: 2026-06-29 Task: Fix loadFromState race condition (#7) and Plugin Context stale closure (#8)

Files Modified

frontend/src/App.tsx — refs for PluginContext, loadFromState guard
frontend/src/crdt/YjsDocument.ts — loadFromState guard against empty data clearing maps

Test Results

1. TypeScript Type Check (`tsc --noEmit`)

$ npx tsc --noEmit
EXIT_CODE=0

Result: PASS — 0 errors

2. Vite Build

$ npx vite build
✓ 341 modules transformed.
✓ built in 8.04s
EXIT_CODE=0

Result: PASS — build successful

3. Grep Verification — useRef refs in App.tsx

182:  const elementsRef = useRef(elements);
184:  const layersRef = useRef(layers);
186:  const blocksRef = useRef(blocks);
188:  const groupsRef = useRef(groups);
190:  const bgConfigRef = useRef(bgConfig);
192:  const activeLayerIdRef = useRef(activeLayerId);

Result: PASS — all refs declared

4. Grep Verification — elementsRef.current in PluginContext

134:      getElements: () => elementsRef.current,
135:      getLayers: () => layersRef.current,
136:      getActiveLayerId: () => activeLayerIdRef.current,

Result: PASS — PluginContext getters use refs

5. Grep Verification — loadFromState guard checks non-empty data

App.tsx:286:        const hasContent = data.elements.length > 0 || data.layers.length > 0 || data.blocks.length > 0 || groups.length > 0 || bgConfigs.length > 0;
App.tsx:287:        if (collab.status === 'connected' && hasContent) {
YjsDocument.ts:127:      if (state.elements.length > 0) {
YjsDocument.ts:133:      if (state.layers.length > 0) {
YjsDocument.ts:139:      if (state.blocks.length > 0) {
YjsDocument.ts:145:      if (state.groups && state.groups.length > 0) {
YjsDocument.ts:151:      if (state.bgConfigs && state.bgConfigs.length > 0) {

Result: PASS — guards in both files

Smoke Test

App builds successfully with vite build (341 modules, 8.04s)
No TypeScript errors
No any type used
No existing PluginContext fields removed

Summary

All test criteria met. Both issues fixed.

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