hermes - 💡(How to fix) Fix feat(feishu): support markdown tables via CardKit table element

Problem

Feishu post type messages do not render markdown tables — they display as raw text with | characters. Users sending table-formatted data (e.g., fund performance summaries, monitoring data) get unreadable output.

Solution

Detect markdown tables in message content using a regex pattern (^\|.*\|\n\|[-|: ]+\|) and route them to the Feishu CardKit table element instead of post.

Changes

• parse_markdown_table() — parses markdown table string into (columns, rows) tuples for CardKit consumption
• _build_ordered_blocks() — splits message into text and table blocks, preserving order
• send_card_table() — async method to send a CardKit card with a table element (header + data rows)
• send_text() override — detects tables in formatted content, builds a combined CardKit card (markdown sections + table element in order), falls back to plain text if table parsing fails

Example

Input:

## 基金业绩

| 基金名称 | 近一年收益 |
|---------|-----------|
| 信澳业绩驱动混合C | +338.86% |

Output: A CardKit card with a blue header and a rendered Feishu table.

Backwards Compatibility

• Non-table messages unchanged
• If table parsing fails, falls back to plain text send