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-dispatch-diagnostic.spec.ts

@@ -0,0 +1,72 @@
+import { test, expect } from '@playwright/test';
+import fs from 'node:fs';
+import path from 'node:path';
+
+/* Temporary diagnostic: the console reports no dispatch, no echo and no error.
+ * Count the real DOM nodes before and after switching to the Scripting workspace. */
+test('console dispatch diagnostic', async ({ page }, info) => {
+  const record: Record<string, unknown> = {};
+  const consoleErrors: string[] = [];
+  record.consoleErrors = consoleErrors;
+  page.on('console', message => { if (message.type() === 'error') consoleErrors.push(message.text().slice(0, 300)); });
+  const probe = () => page.evaluate(() => ({
+    consoleRegion: document.querySelectorAll('[aria-label="Python Console"]').length,
+    wasmConsole: document.querySelectorAll('.wasm-python-console').length,
+    pythonInput: document.querySelectorAll('[aria-label="Python 输入"]').length,
+    promptMarks: (document.body.innerText.match(/>>>/g) ?? []).length,
+    bodyLen: document.body.innerText.length,
+    bodyTail: document.body.innerText.slice(-600),
+    pressedDesktop: document.querySelector('[aria-label="工作区显示"] button')?.getAttribute('aria-pressed') ?? null,
+    pressedWeb: document.querySelectorAll('[aria-label="工作区显示"] button')[1]?.getAttribute('aria-pressed') ?? null,
+    workspaceNodes: document.querySelectorAll('[class*="workspace"]').length,
+    sourceWorkspace: document.querySelectorAll('.wasm-source-workspace').length,
+    editors: Array.from(document.querySelectorAll('[data-editor]')).map(n => n.getAttribute('data-editor')),
+    dataWorkspace: document.querySelector('main')?.getAttribute('data-workspace') ?? null,
+    areas: Array.from(document.querySelectorAll('[data-area-editor], .area')).slice(0,20).map(n => n.className),
+  }));
+  await page.goto('/');
+  await page.getByTestId('blend-file-input').setInputFiles(path.resolve(import.meta.dirname, '../../../tests/files/web/basic_scene.blend'));
+  await expect(page.getByTestId('engine-status')).toContainText(/SceneIR/, { timeout: 60_000 });
+  record.afterLoad = await probe();
+  const webTools = page.getByTestId('native-web-tools-toggle');
+  record.webToolsCount = await webTools.count();
+  await webTools.click({ force: true }).catch(() => {});
+  await page.waitForTimeout(1500);
+  record.afterToolsToggle = await probe();
+  const scriptTab = page.getByRole('button', { name: 'Scripting', exact: true }).first();
+  record.scriptingCount = await page.getByRole('button', { name: 'Scripting', exact: true }).count();
+  record.scriptingDisabled = await scriptTab.isDisabled().catch(() => null);
+  record.scriptingCurrentBefore = await scriptTab.getAttribute('aria-current').catch(() => null);
+  record.statusBefore = await page.getByTestId('engine-status').textContent().catch(() => null);
+  const timeline = [];
+  const snap = async (label: string) => timeline.push({ label, ws: await page.locator('main').getAttribute('data-workspace'), st: await page.getByTestId('engine-status').textContent().catch(() => null) });
+  record.domDispatch = await page.evaluate(() => {
+    const btns = Array.from(document.querySelectorAll('nav[aria-label="工作区"] button'));
+    const target = btns.find(b => (b.textContent ?? '').trim() === 'Scripting');
+    if (!target) return { found: false, names: btns.map(b => (b.textContent ?? '').trim()) };
+    const r = target.getBoundingClientRect();
+    const top = document.elementFromPoint(r.x + r.width / 2, r.y + r.height / 2);
+    const info = { found: true, disabled: (target as HTMLButtonElement).disabled, rect: [Math.round(r.x), Math.round(r.y), Math.round(r.width), Math.round(r.height)],
+      topTag: top?.tagName ?? null, topClass: (top as HTMLElement | null)?.className ?? null, topIsTarget: top === target };
+    target.click();
+    return info;
+  });
+  await snap('t+0'); await page.waitForTimeout(400); await snap('t+400');
+  await page.waitForTimeout(800); await snap('t+1200');
+  await page.waitForTimeout(1500); await snap('t+2700');
+  record.timeline = timeline;
+  record.scriptingCurrentAfter = await scriptTab.getAttribute('aria-current').catch(() => null);
+  record.afterScripting = await probe();
+  const input = page.getByLabel('Python 输入', { exact: true }).last();
+  if (await input.count()) {
+    await input.fill('print(1 + 1)');
+    await input.press('Enter');
+    await page.waitForTimeout(4000);
+    record.valueAfterEnter = await input.inputValue();
+    record.afterEnter = await probe();
+    record.alerts = await page.locator('[role="alert"]').allTextContents();
+  }
+  record.engineStatus = await page.getByTestId('engine-status').textContent().catch(() => null);
+  fs.writeFileSync(info.outputPath('console-diagnostic.json'), JSON.stringify(record, null, 1));
+  console.log(JSON.stringify(record, null, 1));
+});