[SuperPiIot]

Fixes #4327

Summary

• Adds if !self.same_line_as_prev() || prec < min_prec in Parser::parse_binary (compiler/crates/hy-syntax/src/parser.rs) so that binary operator tokens starting a new line do not silently continue the previous expression across statement boundaries.
• Preserves trailing operator continuation (e.g. a +\nb), where the binary operator remains on the same line as lhs.
• Adds regression unit tests:
  • line_leading_binary_ops_do_not_fold_across_newlines: ensures c := a\n-b and d := a\n&b parse as separate statements rather than folding into binary expressions.
  • trailing_binary_op_before_newline_continues_onto_next_line: ensures c := a +\nb continues onto the next line as expected.

Verification

• Tested with cargo test -p hy-syntax (118/118 passing, 0 failed).

Settlement Coords

• Network: Base Mainnet (Chain ID 8453)
• Asset: USDC
• Address: 0xf084cF0076F91AA48C2370F427C399dAA8C1f07F