chore: checkpoint web Blender migration source, tools and docs

Accumulated uncommitted work: GHOST Web backend, WebGL/GPU web layer,
web workflow engine and protocol, tooling, docs and task records.
Large generated evidence, user-testing archives, build snapshots and
imported test assets remain untracked.

Co-Authored-By: Claude Code <noreply@anthropic.com>

web/tests/e2e/console-undo-value.spec.ts

@@ -0,0 +1,45 @@
+import { test, expect } from '@playwright/test';
+import path from 'node:path';
+
+const fixture = path.resolve(import.meta.dirname, '../../../tests/files/web/basic_scene.blend');
+
+async function menuUndo(page: import('@playwright/test').Page) {
+  await page.getByRole('button', { name: '编辑', exact: true }).first().click({ force: true });
+  await page.waitForTimeout(400);
+  await page.getByRole('menuitem', { name: '撤销', exact: true }).first().click({ force: true });
+  await page.waitForTimeout(2500);
+}
+
+test('undo via menu after console assignment', async ({ page }) => {
+  await page.goto('/');
+  await page.getByTestId('blend-file-input').setInputFiles(fixture);
+  await expect(page.getByTestId('engine-status')).toContainText(/SceneIR/, { timeout: 60_000 });
+  await page.getByTestId('native-web-tools-toggle').click({ force: true });
+  await page.waitForTimeout(1200);
+  await page.evaluate(() => {
+    const b = Array.from(document.querySelectorAll('nav[aria-label="工作区"] button'))
+      .find(x => (x.textContent ?? '').trim() === 'Scripting') as HTMLButtonElement | undefined;
+    b?.click();
+  });
+  await page.waitForTimeout(1500);
+  const input = page.getByLabel('Python 输入', { exact: true }).last();
+  await expect(input).toBeVisible({ timeout: 30_000 });
+  const run = async (tag: string) => {
+    await input.fill(`print('${tag}', bpy.data.objects['BasicCube'].location.x)`);
+    await input.press('Enter');
+    await page.waitForTimeout(2500);
+    const out = await page.getByRole('region', { name: 'Python Console', exact: true }).innerText();
+    const line = out.split('\n').filter(l => l.includes(tag)).pop() ?? 'missing';
+    console.log(`PROBE ${tag} => ${line.trim()}`);
+  };
+  await input.fill("bpy.data.objects['BasicCube'].location.x = 3");
+  await input.press('Enter');
+  await page.waitForTimeout(3000);
+  await run('XSET');
+  await menuUndo(page);
+  await run('X1');
+  await menuUndo(page);
+  await run('X2');
+  await menuUndo(page);
+  await run('X3');
+});