fix(runtime): onGenerateRoute pathElements 越界 RangeError

- buy-service/renew-minioffice 加长度检查 (pathElements.length >= 4/3)
- 根因: Flutter web 深链接渐进式路径解析, onGenerateRoute 被调用多次,
  pathElements 递增 ([,buy-service] -> [,buy-service,1] -> 完整),
  前几次路径短但 pathElements[1]已匹配 -> int.parse([2])/[3] 越界
- 直接访问/刷新 /buy-service/x/y, /renew-minioffice/x 时崩溃
- 恢复 buy_service 实验代码 (data 校验 + mounted 保留)

tools/e2e/main.dart.js

@@ -0,0 +1,46 @@
+"use strict";
+
+
+
+// A map containing the URLs for the bootstrap scripts in debug.
+let _scriptUrls = {
+  "mapper": "stack_trace_mapper.js",
+  "requireJs": "require.js"
+};
+
+// Create a TrustedTypes policy so we can attach Scripts...
+let _ttPolicy;
+if (window.trustedTypes) {
+  _ttPolicy = trustedTypes.createPolicy("flutter-tools-bootstrap", {
+    createScriptURL: (url) => {
+      let scriptUrl = _scriptUrls[url];
+      if (!scriptUrl) {
+        console.error("Unknown Flutter Web bootstrap resource!", url);
+      }
+      return scriptUrl;
+    }
+  });
+}
+
+// Creates a TrustedScriptURL for a given `scriptName`.
+// See `_scriptUrls` and `_ttPolicy` above.
+function getTTScriptUrl(scriptName) {
+  let defaultUrl = _scriptUrls[scriptName];
+  return _ttPolicy ? _ttPolicy.createScriptURL(scriptName) : defaultUrl;
+}
+
+// Attach source mapping.
+var mapperEl = document.createElement("script");
+mapperEl.defer = true;
+mapperEl.async = false;
+mapperEl.src = getTTScriptUrl("mapper");
+document.head.appendChild(mapperEl);
+
+// Attach require JS.
+var requireEl = document.createElement("script");
+requireEl.defer = true;
+requireEl.async = false;
+requireEl.src = getTTScriptUrl("requireJs");
+// This attribute tells require JS what to load as main (defined below).
+requireEl.setAttribute("data-main", "main_module.bootstrap");
+document.head.appendChild(requireEl);