task(A4.9): migrate event domain tools (chair/row/block/table/stage) to v2

frontend/tests/pilotTools.test.ts

@@ -6,8 +6,9 @@
 import { describe, it, expect, vi } from 'vitest';
 import { lineTool, coreDrawingPlugin } from '../src/plugins/builtin/core-drawing';
 import { selectTool, coreModifyPlugin } from '../src/plugins/builtin/core-modify';
-import { coreMeasurePlugin } from '../src/plugins/builtin/core-measure';
 import { coreAnnotatePlugin } from '../src/plugins/builtin/core-annotate';
+import { coreMeasurePlugin } from '../src/plugins/builtin/core-measure';
+import { eventToolsV2Plugin } from '../src/plugins/builtin/event-tools';
 import { CADDocument } from '../src/kernel/document/CADDocument';
 import { createInMemoryDoc } from './helpers/inMemoryDoc';
 import type { ToolPointerEvent, FullToolContext } from '../src/plugins/types';
@@ -348,6 +349,58 @@ describe('A4.5 pilot: hatch tool', () => {
   });
 });
 
+describe('A4.9 pilot: event tools', () => {
+  it('chair platziert Einzel-Element per Klick', () => {
+    const { ydoc } = createInMemoryDoc();
+    const doc = new CADDocument(ydoc);
+    const ctx = makeCtx({ doc });
+    const chair = eventToolsV2Plugin.tools!.find((t) => t.manifest.id === 'chair')!;
+
+    chair.handlers.down!(pe(100, 200), ctx);
+    const all = doc.getAllElements();
+    expect(all.length).toBe(1);
+    expect(all[0].type).toBe('chair');
+    expect(all[0].x).toBe(100);
+    expect(all[0].y).toBe(200);
+  });
+
+  it('seating-block erzeugt rows×cols Elemente in EINER Transaktion (ein undo = ganzer Block weg)', () => {
+    const { ydoc } = createInMemoryDoc();
+    const doc = new CADDocument(ydoc);
+    const ctx = makeCtx({ doc });
+    const block = eventToolsV2Plugin.tools!.find((t) => t.manifest.id === 'seating-block')!;
+
+    block.handlers.down!(pe(0, 0), ctx);   // Legacy-Default: rows=3, cols=8
+    const all = doc.getAllElements();
+    expect(all.length).toBeGreaterThan(1);  // Multi-Element-Satz
+    expect(all.every((e) => e.type === 'chair')).toBe(true);
+
+    // BUG-1-Regressionsschutz: alle Reihen im Block haben eigene rowIds
+    const rowIds = new Set(all.map((e) => e.properties.rowId));
+    expect(rowIds.size).toBeGreaterThanOrEqual(3);
+
+    // Kern-Akzeptanz: EIN undo entfernt den GANZEN Block
+    expect(doc.undo()).toBe(true);
+    expect(doc.getAllElements().length).toBe(0);
+  });
+
+  it('seating-row platziert mehrere Stühle mit gemeinsamer rowId; undo entfernt Reihe', () => {
+    const { ydoc } = createInMemoryDoc();
+    const doc = new CADDocument(ydoc);
+    const ctx = makeCtx({ doc });
+    const row = eventToolsV2Plugin.tools!.find((t) => t.manifest.id === 'seating-row')!;
+
+    row.handlers.down!(pe(0, 0), ctx);
+    const all = doc.getAllElements();
+    expect(all.length).toBeGreaterThanOrEqual(2);
+    const rowIds = new Set(all.map((e) => e.properties.rowId));
+    expect(rowIds.size).toBe(1);            // eine Reihe → EINE rowId
+
+    expect(doc.undo()).toBe(true);
+    expect(doc.getAllElements().length).toBe(0);
+  });
+});
+
 describe('A4.6 pilot: move/copy tools', () => {
   it('move verschiebt selektierte Elemente in EINER Transaktion (undo entfernt Versatz)', () => {
     const { ydoc } = createInMemoryDoc();