feat(feishu): render markdown tables as JSON 2.0 cards

[hikari0511]

Problem

Feishu messages with markdown tables render as ugly plain text with pipe characters (|) because the adapter sends them as msg_type: "text" which does not support table syntax.

Solution

When the content contains a markdown table, send it as an interactive card with schema: "2.0" instead. Feishu JSON 2.0 cards natively render markdown tables with:

• Proper borders and cell alignment
• Header row styling
• Pagination for large tables (max 5 data rows per page)
• Up to 4 tables per markdown component

Change

In gateway/platforms/feishu.py, _build_outbound_payload():

Before: table content → msg_type: "text" (ugly plain text)
After: table content → msg_type: "interactive" with card JSON 2.0 (native table rendering)

if _MARKDOWN_TABLE_RE.search(content):
    card = {
        "schema": "2.0",
        "body": {
            "elements": [
                {"tag": "markdown", "content": content}
            ]
        },
    }
    return "interactive", json.dumps(card, ensure_ascii=False)

Testing

• Verified on Feishu desktop client: tables now render with proper borders and alignment
• Non-table markdown messages continue to use existing post / text paths (no behavior change)
• The _MARKDOWN_TABLE_RE regex detection is unchanged — only the rendering path is affected

References

• Feishu Card JSON 2.0 Rich Text Component — documents table support in JSON 2.0 structure

[daimon-nous]

This is another entry in the saturated Feishu markdown table rendering cluster. Competing open PRs for the same fix: #24649 (Card JSON 2.0), #21000 (interactive card messages), #12114, #16194, #25453. Root issues: #9549, #25452, #21778.

[teknium1]

Thanks for the focused Feishu table-rendering fix. The underlying behavior is still present, but this patch no longer reaches the active adapter.

Problems

• gateway/platforms/feishu.py was relocated by 552adbe0827c32df8ed9bb19e908c26eff43add7; current table handling remains in plugins/platforms/feishu/adapter.py:4524-4534, where it returns "text" for _MARKDOWN_TABLE_RE.
• The PR diff changes only the old source file and adds no regression test. _build_outbound_payload feeds both normal sends (plugins/platforms/feishu/adapter.py:1904) and edits (:1958).

Suggested changes

• Port this branch to plugins/platforms/feishu/adapter.py:_build_outbound_payload and add a plugin-path payload test asserting the interactive Card JSON 2.0 output for a detected table while retaining non-table paths.
• The adapter already sends interactive cards through its normal send transport for approvals (plugins/platforms/feishu/adapter.py:2029-2033), so that is the established integration path to cover.

Automated hermes-sweeper review.

[teknium1]

Current main relocated the active Feishu adapter to plugins/platforms/feishu/adapter.py in 552adbe0827c32df8ed9bb19e908c26eff43add7; its live table branch is now at :4524-4530. Port this change there and add a payload-selection regression test, since this old path no longer affects runtime behavior.