fix: add fallback for crypto.randomUUID() on older WebViews

crypto.randomUUID() is not available on older systems (macOS < 12.3,
Safari < 15.4). This caused "crypto.randomUUID is not a function"
error when adding providers.

- Add generateUUID() utility with getRandomValues() fallback
- Provide user-friendly error message if crypto API unavailable

src/lib/query/mutations.ts

@@ -4,6 +4,7 @@ import { toast } from "sonner";
 import { providersApi, settingsApi, type AppId } from "@/lib/api";
 import type { Provider, Settings } from "@/types";
 import { extractErrorMessage } from "@/utils/errorUtils";
+import { generateUUID } from "@/utils/uuid";
 
 export const useAddProviderMutation = (appId: AppId) => {
   const queryClient = useQueryClient();
@@ -13,7 +14,7 @@ export const useAddProviderMutation = (appId: AppId) => {
     mutationFn: async (providerInput: Omit<Provider, "id">) => {
       const newProvider: Provider = {
         ...providerInput,
-        id: crypto.randomUUID(),
+        id: generateUUID(),
         createdAt: Date.now(),
       };
       await providersApi.add(newProvider, appId);

src/utils/uuid.ts

@@ -0,0 +1,37 @@
+/**
+ * 生成 UUID v4
+ *
+ * 优先使用 crypto.randomUUID()，不可用时使用 crypto.getRandomValues() 实现
+ *
+ * 兼容性：
+ * - crypto.randomUUID(): Chrome 92+, Safari 15.4+, Firefox 95+
+ * - crypto.getRandomValues(): Chrome 11+, Safari 5+, Firefox 21+
+ */
+export function generateUUID(): string {
+  const cryptoApi = globalThis.crypto;
+
+  // 优先使用原生 API
+  if (typeof cryptoApi?.randomUUID === "function") {
+    return cryptoApi.randomUUID();
+  }
+
+  // Fallback: 使用 crypto.getRandomValues 实现 UUID v4
+  if (!cryptoApi?.getRandomValues) {
+    throw new Error(
+      "crypto API not available - please update your operating system",
+    );
+  }
+
+  const bytes = new Uint8Array(16);
+  cryptoApi.getRandomValues(bytes);
+
+  // 设置版本 (4) 和变体 (RFC 4122)
+  bytes[6] = (bytes[6] & 0x0f) | 0x40;
+  bytes[8] = (bytes[8] & 0x3f) | 0x80;
+
+  const hex = Array.from(bytes)
+    .map((b) => b.toString(16).padStart(2, "0"))
+    .join("");
+
+  return `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20)}`;
+}