[NePreby]

Summary

Closes #12.

Adds a "Copy CLI command" action to TxDrawer that generates the equivalent stellar contract invoke --id … -- <method> --arg … command for any pending invocation:

1. CLI Generation Module (frontend/src/lib/cli.ts):
   • Implements toStellarCliCommand({ contractId, method, args, source, network }).
   • Maps methods from both StreamRouter and CascadeSplitter to their exact contract signatures (create_stream, withdraw, withdraw_all, top_up, cancel, withdrawable, get_stream, streams_by_sender, streams_by_recipient, stream_count, set_splits, get_splits, preview, distribute).
   • Automatically unmarshals ScVal representations into native types using scValToNative and formats numbers, strings, addresses, booleans, and complex structures (Vec<Split>) with safe shell quoting and JSON escaping.
2. TxDrawer Integration (frontend/src/components/TxDrawer.tsx):
   • Renders a compact CopyButton labeled "Copy CLI command" in the Invocation section.
   • Populated dynamically with the pending transaction's contractId, method, args, and connected source address.
3. Comprehensive Unit Test Suite (frontend/src/lib/__tests__/cli.test.ts):
   • Includes 17 dedicated unit tests verifying every contract method in StreamRouter and CascadeSplitter, along with flag formatting and shell escape logic.
   • Verified clean with npx tsc -b and npx vitest run (47/47 passing tests across 6 suites).

Payout Wallet:

• TRX Tron (TRC20): TMqmJjRgVS21NL2eFtfyHciTxvE4BqGmEv