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/playwright.candidate-module.config.ts

@@ -0,0 +1,35 @@
+import path from 'node:path';
+import base from './playwright.config';
+
+const candidate = process.env.WBV2_PRODUCTION_CANDIDATE
+  ?? path.resolve(import.meta.dirname, '../build_web_main_desktop/versioning-filepath-20261101/app');
+const specs = (process.env.WBV2_MODULE_SPECS ?? 'smoke.spec.ts').split(',').map(s => s.trim()).filter(Boolean);
+const port = Number(process.env.WEB_TEST_PORT ?? 5480);
+const origin = `http://127.0.0.1:${port}`;
+
+if (!specs.length) throw new Error('WBV2_MODULE_SPECS is empty');
+
+export default {
+  ...base,
+  testMatch: specs,
+  timeout: Number(process.env.WBV2_MODULE_TIMEOUT ?? 300_000),
+  retries: 0,
+  workers: 1,
+  use: {
+    ...base.use,
+    baseURL: origin,
+    viewport: { width: 1440, height: 900 },
+    launchOptions: {
+      ...base.use?.launchOptions,
+      args: [...((base.use?.launchOptions?.args as string[] | undefined) ?? [])
+        .filter(a => !a.startsWith('--use-gl=') && !a.startsWith('--use-angle=')),
+        '--use-gl=angle', '--use-angle=swiftshader', '--enable-unsafe-swiftshader'],
+    },
+  },
+  webServer: {
+    command: `BLENDER_WEB_HTTP_PORT=${port} node ../tools/web/deployment-http-server.mjs '${candidate}'`,
+    url: origin,
+    reuseExistingServer: false,
+    timeout: 60_000,
+  },
+};