feat(connect): add VoteWitnessContract support for Tron signing

[martykan]

Description

Allow voting in Tron following FW PR trezor/trezor-firmware#6524

Also improve error handling by showing a custom message for unknown contract types

Notes for QA

@EuryShadow was testing via Tronscan with staging-Nufi

🔍 Currents Test Results

🔍 Suite web test results: View in Currents

🔍 Suite native android test results: View in Currents

🔒 Quarantined E2E Tests

Trezor Suite (web) — 7 test(s)

Test	Type
Quarantine test: "Account metadata,google - watches files over time"	🙋 manual
Quarantine test: "Account metadata,dropbox - watches files over time"	🙋 manual
Quarantine test: "Trading - Sell inputs,Sell form % inputs and limits"	🙋 manual
Quarantine test: "Trading - Sell inputs,Sell form % inputs and limits"	🙋 manual
Quarantine test: "Multiple sessions,Session overtaken by another"	🙋 manual
Quarantine CANARY test: "Trading - Sell BTC"	🙋 manual
Quarantine test: "Recovery T2T1 - dry run,Recovery after partial recovery"	🙋 manual

Updated: 2026-04-06T18:52:41.949Z • 7 test(s) total

[Copilot]

Pull request overview

Adds Tron VoteWitnessContract support to tronSignTransaction (to enable voting flows) and introduces a more explicit error message path for unsupported Tron contract types.

Changes:

• Extend Tron API schema union to include VoteWitnessContract.
• Update Tron signing flow to map VoteWitnessContract to the corresponding protobuf message.
• Add a custom Method_InvalidParameter error when an unsupported contract type is encountered.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
packages/connect/src/types/api/tron/index.ts	Adds TronVoteWitnessContract schema and includes it in the TronContracts union.
packages/connect/src/api/tron/api/tronSignTransaction.ts	Adds contract-type → protobuf-message mapping for vote witness signing and introduces a custom unsupported-type error path.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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[evgenysl]

QA OK

voting on tronscan.org works with Trezor connected to nu.fi
need to select Tronlink on Tronscan, but nu.fi actually opens

[evgenysl]

Can connect Trezor with WalletConnect also, but voting result in this error:

@martykan the issue is only on tronscan.org's side, am I right?