feat(feishu): render markdown tables as CardKit v2 native table components

[vvv-cyber]

Problem

Feishu/Lark's post-type md tag does not support markdown table syntax (| col | col |). The current adapter detects markdown tables and forces them to plain text (_MARKDOWN_TABLE_RE → text msg_type), losing all table structure. Users see raw pipe-delimited text instead of a formatted table.

Closes #9549

Solution

Detect markdown tables in outbound content and convert them to CardKit v2 interactive cards with native table components, while non-table text renders as markdown elements within the same card.

Changes

gateway/platforms/feishu.py (+177/-9):

1. _MARKDOWN_TABLE_LINE_RE / _MARKDOWN_TABLE_DIVIDER_RE — table row and separator detection
2. _parse_markdown_table(text) — splits content into [{"type": "text"/"table", ...}] segments
3. _build_table_card(headers, rows) — builds CardKit v2 table component (columns + rows dict-list, strips ** bold markers, sets header_style)
4. _build_interactive_card_with_tables(text) — assembles schema: "2.0" card: table segments → table elements, text segments → markdown elements
5. _build_outbound_payload() — routes table content to interactive msg_type; non-table content unchanged

tests/gateway/test_feishu.py (+106): 11 unit tests covering table parsing, card structure, bold stripping, row normalization, and mixed text/table content.

Behavior

Input	Before	After
Markdown with table	Plain text (pipe-delimited)	CardKit v2 interactive card with native table
Markdown without table	post/text (unchanged)	post/text (unchanged)
Mixed text + table	All plain text	Markdown elements + table component in one card

Example CardKit v2 output

```json
{
"schema": "2.0",
"config": {"wide_screen_mode": true},
"body": {
"elements": [
{"tag": "markdown", "content": "Some intro text"},
{
"tag": "table",
"columns": [
{"name": "col_0", "display_name": "Name", "data_type": "text", "width": "auto"},
{"name": "col_1", "display_name": "Age", "data_type": "text", "width": "auto"}
],
"rows": [
{"col_0": "Alice", "col_1": "30"},
{"col_0": "Bob", "col_1": "25"}
],
"header_style": {"bold": true, "text_align": "left", "text_size": "normal"}
}
]
}
}
```

Notes

• Non-table messages are completely unaffected — no change to the post/text path
• Bold markers (**, __) in headers/cells are stripped (CardKit v2 text data_type doesn't support markdown syntax; header_style.bold: true handles header emphasis
• Multiple tables in one message each become separate elements
• The existing is kept for backward compatibility

Testing

11 passed in 1.51s

• (5 tests): no-table, simple table, mixed content, bold headers, multiple tables
• (3 tests): card structure, bold stripping, row normalization
• (3 tests): no-table returns None, table returns card, mixed content

References

• CardKit v2 Table component docs
• Community implementation: chapaofan/Hermes-feishu-to-table
  EOF
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[alt-glitch]

This was generated by AI during triage.

Correction: this PR was updated to the active Feishu plugin-adapter path with shared validated table parsing and rejection fallbacks. It is related to #12114 and #61496, not a duplicate of the retired gateway-path proposal.

[tonydwb]

Code Review Summary

Verdict: Approved

• 2 files changed, +283/-9 lines — renders markdown tables as CardKit v2 native table components in Feishu
• Adds markdown table parser with proper cell alignment; clean feature enhancement

---

Reviewed by Hermes Agent

[teknium1]

Thanks for addressing a real Feishu rendering gap. Current main still routes detected tables to plain text at plugins/platforms/feishu/adapter.py:4524-4534.

Problems

• The PR targets gateway/platforms/feishu.py, which was renamed to plugins/platforms/feishu/adapter.py by 5600105478ffde29d7566b45421b100eaa29c4ef; the added test imports target the removed module path.
• The added line matcher recognizes any pipe-delimited line as a table, unlike main's current header-plus-divider detection at plugins/platforms/feishu/adapter.py:158-160. Please avoid converting standalone pipe text into interactive tables.
• Main's API-rejection fallback is restricted to post messages at plugins/platforms/feishu/adapter.py:1913-1936 and :1963-1970; the proposed interactive path needs an equivalent tested fallback or a documented fail-closed rationale.

Suggested changes

• Rebase the implementation concept onto the bundled Feishu plugin path, require a validated GFM divider before table conversion, and cover rejected interactive payload handling for send and edit.

Automated hermes-sweeper review.

[vvv-cyber]

Ported the implementation to the bundled Feishu plugin architecture on current main and addressed the automated review:

• moved active code to plugins/platforms/feishu/adapter.py
• added a shared, strict GFM header+separator parser
• preserved table-looking examples inside fenced code blocks
• added native CardKit v2 table components with mixed markdown/table ordering
• added send and edit fallbacks from rejected interactive cards to original plain text
• added focused regression coverage

Verification: 237 passed; Ruff passed.

[alt-glitch]

This was generated by AI during triage.

Related to #12114 and #61496. This PR now implements the active plugin-adapter path with shared validated table parsing and rejection fallbacks, so it is no longer a duplicate of the retired gateway-path proposal.