fix: top up sessions before signing credentials

[parvahuja]

Fixes automatic Tempo session top-ups before credentials are signed.

• uses one shared pre-sign hook for HTTP, SSE, and WebSocket
• applies topUpAmount, then bounded suggestedDeposit, then the exact shortfall
• retries management credentials against refreshed TIP-1034 challenges
• excludes closing channels from recovery

Supersedes #688.

Validation

• 231 focused session tests
• 38 focused Fetch 402 retry tests
• pnpm check:ci
• pnpm check:types
• pnpm check:types:html
• pnpm check:types:examples
• pnpm build

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/mppx@687

commit: 3da3446

[chatgpt-codex-connector]

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Reviewed commit: 2c3aebed13

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[parvahuja]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. You're on a roll.

Reviewed commit: 7eccd63c84

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

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