fix: use browser history in web mode for proper URL routing

The router was using memory history with initial entry "/" which caused
all routes to render the index component regardless of the browser URL.

Changes:
- Use browser history when not in Electron (for e2e tests and dev)
- Use memory history only in Electron environment
- Update test utilities to use persist version 2 to match app store

This fixes e2e tests that navigate directly to /board, /context, /spec

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/src/utils/router.ts

@@ -1,10 +1,17 @@
-import { createRouter, createMemoryHistory } from "@tanstack/react-router";
+import { createRouter, createMemoryHistory, createBrowserHistory } from "@tanstack/react-router";
 import { routeTree } from "../routeTree.gen";
 
+// Use browser history in web mode (for e2e tests and dev), memory history in Electron
+const isElectron = typeof window !== "undefined" && window.electronAPI !== undefined;
+
+const history = isElectron
+  ? createMemoryHistory({ initialEntries: [window.location.pathname || "/"] })
+  : createBrowserHistory();
+
 export const router = createRouter({
   routeTree,
   defaultPendingMinMs: 0,
-  history: createMemoryHistory({ initialEntries: ["/"] }),
+  history,
 });
 
 declare module "@tanstack/react-router" {