Root cause: _fetch_all_daily_bars used get_security_bars() for all files,
but index server responses have 4 extra bytes per record. Wrong parser
produced garbage dates like '12897-50-77' for sh000001, sh000300, etc.
Fix: add _is_index_code() to detect index codes by prefix (sh: 00/88/99,
sz: 39) and route to get_index_bars() accordingly.
Bumps version to 1.6.1.
- New 'offline' command group with 8 subcommands: home, daily, min,
ex-files, ex-daily, gbbq, financial, blocks
- No network required, reads local TDX data files directly
- Updated CLI examples and README with offline documentation
- Added v1.5.0 changelog entry
- K-line: daily+ periods output 'date' only, minute periods output 'datetime'
- Transactions (tick-by-tick): combine date param + hour/minute into 'datetime'
- XdxrRecord, HistoricalFundFlow: year/month/day merged to 'date'
- MinuteBar: rename unknown_1 to _unknown_1 (hidden from DataFrame)
- MinuteBar: add datetime column computed from bar index (A-share 240-bar pattern)
- get_minute_time_data: use history endpoint only (current-day endpoint broken in pytdx too)
- Update all examples to reflect new DataFrame column names
- K-line: daily+ periods output 'date' only, minute periods output 'datetime'
- Transactions (tick-by-tick): combine date param + hour/minute into 'datetime'
- XdxrRecord, HistoricalFundFlow: year/month/day merged to 'date'
- MinuteBar: rename unknown_1 to _unknown_1 (hidden from DataFrame)
- MinuteBar: add datetime column computed from bar index (A-share 240-bar pattern)
- get_minute_time_data: use history endpoint only (current-day endpoint broken in pytdx too)
- Update all examples to reflect new DataFrame column names