Fix correctness bugs and clean up dead code across CLI

[Uxio0]

What

Fixes a batch of correctness bugs and removes dead code found during a full-codebase review. No new features, no behavior changes beyond fixing the bugs below.

Correctness fixes

tx-builder file decoder (tx_builder_file_decoder.py)

• Preserve the array suffix for tuple-array types (tuple[], tuple[N]). Before, the [] was dropped, so both the 4-byte selector and the ABI encoding targeted the wrong (non-array) signature — a batch file calling a method with an array-of-structs argument silently built the wrong calldata.
• parse_int_value now requires the 0x prefix for hex. Before, a bare string like "abc" / "deadbeef" was silently parsed base-16, producing a wrong amount.
• Missing/null contractInputsValues no longer crashes with an opaque error; a missing per-field value now raises a clear Missing value for input 'X'.
• value is coerced to int (missing/empty defaults to 0) instead of passing a string/None downstream.

tx-service operator (safe_tx_service_operator.py)

• confirm_message and sign_message now return False after the "owner not loaded" / "no owner loaded" guards, instead of falling through to a None-deref crash or posting an empty signature.

safe operator (safe_operator.py)

• No-arg SafeOperatorException subclasses no longer crash the generic handler (e.args[0] IndexError); GuardNotSupportedException / FallbackHandlerNotSupportedException now carry messages.
• change_* / update_version* always return a bool (added the missing failure/success returns).
• change_threshold rejects threshold < 1 locally.
• Cached nonce is set to safe_tx.safe_nonce + 1 instead of a blind += 1, so the displayed nonce is correct when a custom --safe-nonce is used.
• load_cli_owners_from_words reports an explicit empty-seed error for an unset/empty env var.

main / prompt parser

• SAFE_CLI_INTERACTIVE="" is respected instead of silently ignored.
• Default-command routing uses Web3.is_address, so a lowercase (non-checksummed) Safe address starts attended mode instead of erroring with "No such command".
• process_command uses shlex.split, so quoted/multi-word args (e.g. delegate labels with spaces) parse correctly.

hardware wallet / hd wallet

• Ledger exception wrapper matches the message with in str(e) instead of in e.args, so the USB-write recovery hint actually fires.
• get_account_from_words no longer overrides a caller-supplied hd_path when index != 0.
• Trezor legacy-tx data access made consistent with the other branches.

Cleanup

• safe_lexer: fixed the address/tx-hash regex ({62} → {64}, malformed [aA-zZ,0-9] → [a-fA-F0-9]).
• safe_completer / safe_completer_constants: argument coloring now works for multi-arg commands; removed the dead safe_color_arguments dict, the dead change_owner meta entry, and fixed the change_threshold hint (<address> → <integer>).

Testing

• ruff check and ruff format clean.
• Full test suite: 83 passed, 1 skipped (ran against local ganache).

Notes / deliberately out of scope

• Did not change LedgerWallet.get_address to pass self.dongle — it alters runtime behavior and breaks an existing test that encodes the old contract; real-world impact is low.
• Did not change the --interactive vs SAFE_CLI_INTERACTIVE=0 precedence — current behavior matches the documented "only --non-interactive overrides" design.
• Left the @cache on get_trezor_client (documented as intentional) and the argparse/typer validator duplication (larger refactor) for follow-ups.

[chatgpt-codex-connector]

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