weijia b34cffe801 feat(fsapp): render agent run as one continuously-updating Feishu card (#131) ...

Rework the Feishu frontend so each user turn renders as a single
collapsible task card that patches itself in place, replacing the
dq-based streaming path that produced many fragmented messages.

- One _TaskCard per turn; hook reacts to summary / exit_reason events
  from the agent loop and patches the same card.
- Each step is a foldable panel: header shows the summary, expanding
  reveals three sections (auto-hidden when empty):
    * Thinking   - from response.thinking (separate field, not content)
    * Tool Calls - tool name + truncated JSON args
    * Output     - response.content, with protocol tags stripped so
                   the header summary is not duplicated inside
- Final reply rendered as a schema 2.0 markdown card for consistency.
- Code-review pass per code_review_principles.md:
    * _TaskCard owns only stateful card lifecycle (start/step/done/fail)
    * Pure formatting extracted to module-level _build_step_detail and
      _fmt_tool_call (no more reaching into card._private from the hook)
    * Hook is a ~10-line dispatcher
    * Flattened a 4-level nested lambda into a named function

2026-04-22 14:12:51 +08:00

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