solve() throws "Unable to parse solution. Too few lines." when output_flag or log_to_console is false

## Summary In highs-js v1.8.0, calling `solve()` with `output_flag: false` (or `log_to_console: false`) in the options causes the wrapper to throw: ``` Error: Unable to parse solution. Too few lines. ``` The underlying HiGHS solver runs fine and finds the optimum — the failure is in the JS wrapper's solution parsing. ## Root cause The wrapper appears to capture HiGHS's stdout into an internal buffer (`q` in `build/highs.js`) and parse the solution from it. Setting `output_flag: false` or `log_to_console: false` silences that stream, so `q` ends up empty and `fc()` throws: ```js function fc(a){if(3>q.length)throw Error("Unable to parse solution. Too few lines."); ... } ``` ## Reproduction ```js const highsLoader = require('highs'); const PROBLEM = `Maximize obj: x1 + 2 x2 Subject To c1: x1 + x2 <= 10 Bounds 0 <= x1 <= 5 0 <= x2 <= 5 End`; (async () => { const highs = await highsLoader(); // Works: console.log(highs.solve(PROBLEM, { time_limit: 5 }).Status); // Optimal // Throws "Unable to parse solution. Too few lines.": try { highs.solve(PROBLEM, { time_limit: 5, output_flag: false }); } catch (e) { console.log('threw:', e.message); } // Same: try { highs.solve(PROBLEM, { time_limit: 5, log_to_console: false }); } catch (e) { console.log('threw:', e.message); } })(); ``` I hit this in a browser worker where I wanted to suppress the noisy HiGHS log on each solve. The MIP I was actually solving had ~440 binary vars and ~296 constraints, but the bug reproduces on a trivial 2-variable LP too. ## Workaround Don't pass `output_flag` or `log_to_console` (or set them to `true`). HiGHS then logs its banner and progress to stdout, but `solve()` returns the parsed solution as expected. ## Suggested fix Either: 1. Have the wrapper extract the solution through a different channel (e.g., `solution_file` written to the in-memory FS, then read back), so user-facing log flags don't break parsing; or 2. Document that `output_flag` / `log_to_console` are incompatible with `solve()` and ignore them (or warn) when set to `false`. Option 1 is the friendlier fix — these are standard HiGHS options users naturally reach for. ## Environment - highs v1.8.0 - Node 22 (also reproduced under jsdom/vitest) - macOS (darwin)