feat(taobao): add native mini program with shared backend

Preserve H5 flows while adding Taobao identity, native capture, reports and isolated local development. Fix canceled province selection and expired-session logout. Record passing local regressions, two pre-existing H5 assertion failures and pending platform validation.

taobao/test/legacy-playwright.cjs

@@ -0,0 +1,12 @@
+// Resolve the repository's unmodified H5 browser tests against this project's
+// local Playwright installation, instead of requiring a global npm install.
+const cp = require('node:child_process'), path = require('node:path');
+const original = cp.execSync;
+cp.execSync = function (command, options) {
+  if (command === 'npm root -g') {
+    const value = path.resolve(__dirname, '../node_modules') + '\n';
+    return options && options.encoding ? value : Buffer.from(value);
+  }
+  return original.apply(this, arguments);
+};
+require('node:module').syncBuiltinESMExports();