feat: hybrid signature and mnemonic import

[ruseinov]

No description provided.

[augmentcode]

🤖 Augment PR Summary

Summary: This PR adds an opt-in Quip “dev signer” injection flow and a UI path to import Quip accounts by mnemonic/seed.

Changes:

• App bootstrap now runs initQuipSigner() before rendering to ensure the Quip signer and extrinsic fake-signature patch are applied early.
• Introduced packages/apps/src/initQuipSigner.ts to gate signer injection via env/query/localStorage, load Quip WASM + signer modules, and inject dev-seed accounts.
• Patched polkadot-js fake signature sizing to accommodate Quip hybrid signatures for fee estimation.
• Exposed a minimal globalThis.quipSigner UI API so page-accounts can import mnemonics without a circular dependency.
• Added a new “From Quip mnemonic” action and modal to page-accounts when the Quip signer API is present.
• Webpack now defines process.env.QUIP_DEV_SIGNER and extends module resolution to include the repo-level node_modules.

Technical Notes: Signer injection is explicitly opt-in (env/query/storage) and uses dynamic imports + WASM initialization before enabling mnemonic import into the injected keyring path.

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[augmentcode]

Review completed. 2 suggestions posted.

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[augmentcode]

packages/apps/src/initQuipSigner.ts:84 — isInjected is set to true before the async dynamic imports/wasm init. If any of those steps throw, the session will be permanently marked as injected and later calls to initQuipSigner() won’t retry even though nothing was actually injected.

Severity: medium

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[augmentcode]

packages/page-accounts/src/modals/QuipMnemonic.tsx:54-59 — On success you call onClose() (likely unmounting the modal) and then .finally(() => setIsBusy(false)) still runs, which can update state after unmount. This can lead to noisy warnings or flaky behavior around closing the modal immediately after import.

Severity: low

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[ruseinov]

Beware of relative paths! this is not to be merged in it's current state.