Commits on Jun 5, 2026

1. feat: pretty-printed table output with auto-detected TTY (#163) …

   * feat: pretty-printed table output with auto-detected TTY
   
   When stdout is a TTY, format query results as an aligned table with
   Unicode box-drawing borders. When piped, output stays CSV (preserving
   scriptability). Numeric columns are right-aligned, text left-aligned.
   
   - Add src/table.zig: buffers rows, computes column widths, detects
     numeric columns, prints formatted table with ┌─┬─┐ borders
   - Add --table / --no-table flags for explicit control (TableMode enum)
   - Auto-detect stdout TTY in main() to resolve table mode
   - Table mode disabled when --output writes to a file
   - --table is incompatible with non-CSV/TSV output formats (error)
   - Update README.md with table output examples and flag docs
   - Add 7 integration tests covering table output, piped CSV, error
     paths, numeric alignment, empty results, and --output interaction
   
   Closes #156
   
   * refactor: two-pass streaming and Unicode width support for table output
   
   - Implement two-pass streaming with sqlite3_reset to reduce memory from O(rows×cols) to O(cols)
   - Add visualWidth() helper for proper CJK character alignment (width 2)
   - Check sqlite3_step return codes and propagate errors
   - Batch write operations for better performance
   - Show NULL explicitly instead of blank cells
   - Fix Z023 parameter order (std.Io before other params)
   - Add unit tests for isNumericString and visualWidth

   

   vmvarela authored Jun 5, 2026
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