fix: handle navigation when browser storage is blocked

[joseph0926]

Fixes: #14325

Fixes navigation errors that occur when browser storage (localStorage/sessionStorage) is blocked for any reason.
(In my case, I confirmed this occurs when “Do not save data” is enabled in Chrome.)

Problem

When users block cookies/storage in their browser settings, React Router v7 throws an unhandled SecurityError during client-side navigation, causing the application to show "Application Error" instead of navigating properly.

Solution

Added try-catch blocks around sessionStorage access in fog-of-war.ts to handle storage access errors,

Test Instructions

Manual Testing

1. Visit https://reactrouter.com
2. Open Chrome settings → Site settings → Cookies → Block all cookies
3. Navigate to /docs page
4. Go back to the home page(the security console error mentioned earlier appears here)
5. Navigate to /docs page
6. Page is broken

Integration Test

Added integration test in session-storage-denied-test.ts that simulates blocked storage and verifies navigation still works.

Note

Referencing other catch blocks, I did not add any separate logs or similar to the catch block. I simply left a comment.

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Latest commit: d0a4ac3

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