[goodbounties-nanoclaw-agent]

Closes #82

Summary

• Web3Auth, our login provider, has paused its service after a security incident involving Keplr wallets. When a login attempt fails, the generic auto-closing "Failed to login. Please try again." toast is replaced by a persistent "Login temporarily unavailable" notice.
• The notice has no auto-dismiss and no progress bar, and stays until the user closes it with the X. It keeps the existing error toast look (red ! icon, X button).
• It is only shown after a failed login attempt. The clean sign-in screen is unchanged.
• The shared toast now accepts rich content (content alongside message), and rich toasts use an auto height instead of the fixed single-line height. Existing toasts are unaffected.
• The notice is plain DOM text (no translate="no"), so browser translation works like the rest of the wallet. Both links are embedded in the text (Web3Auth status updates, claim through GoodDapp).
• No feature flag: this is temporary, and reverting this PR restores the original toast.

Test plan

• yarn vitest run: 14 files, 128 tests pass (new tests for notice content, link targets, no translate="no", and that the toast is not auto-closed).
• Biome check passes on the changed files.
• tsc --noEmit shows no errors in the changed files (existing errors about missing .svg module types are unrelated).
• Ran the dev server and opened /Welcome/Auth with no Web3Auth config so login failed: the notice appears as a persistent toast with the red ! icon and X.
• Reviewer: confirm on a deployment that a real failed Web3Auth login shows the notice, that X closes it, and that both links open the right pages.
• Reviewer: check the notice on a small mobile screen (it is taller than the old one-line toast).

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