fix: replace crypto.randomUUID with polyfill for HTTP contexts

crypto.randomUUID() is only available in secure contexts (HTTPS/localhost).
Add uuid() utility with fallback for HTTP deployments.

src/lib/ai.ts

@@ -1,4 +1,5 @@
 import type { AiConfig } from "@/stores/settingsStore";
+import { uuid } from "@/lib/utils";
 import type {
   ColumnInfo,
   ConnectionConfig,
@@ -111,7 +112,7 @@ export async function runAiStream(
 
   const messages: api.AiMessage[] = [...(history || []), { role: "user", content: userPrompt }];
 
-  const sid = sessionId || crypto.randomUUID();
+  const sid = sessionId || uuid();
   const params = actionParams(input.action);
 
   await api.aiStream(

src/lib/sidebarLayout.ts

@@ -1,4 +1,5 @@
 import type { ConnectionConfig, ConnectionGroup, SidebarLayout, SidebarOrderEntry, TreeNode } from "@/types/database";
+import { uuid } from "@/lib/utils";
 
 export function emptyLayout(): SidebarLayout {
   return { groups: [], order: [] };
@@ -234,7 +235,7 @@ function reorderConnection(
 }
 
 export function createGroup(layout: SidebarLayout, name: string): { layout: SidebarLayout; groupId: string } {
-  const groupId = crypto.randomUUID();
+  const groupId = uuid();
   const group: ConnectionGroup = { id: groupId, name, collapsed: false };
   return {
     groupId,

src/lib/utils.ts

@@ -5,3 +5,13 @@ import { twMerge } from "tailwind-merge";
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
 }
+
+export function uuid(): string {
+  if (typeof crypto !== "undefined" && typeof crypto.randomUUID === "function") {
+    return crypto.randomUUID();
+  }
+  return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, (c) => {
+    const r = (Math.random() * 16) | 0;
+    return (c === "x" ? r : (r & 0x3) | 0x8).toString(16);
+  });
+}