#16647: feat(feishu_doc): allow optional initial content on create

## Summary - feat(feishu_doc): allow optional initial content on create - Split from our `v2026.2.13` patch train as a single-purpose change for easier review. ## Why - Keep the diff focused and low-risk so it can be merged or reverted independently. ## Scope - Branch: `feat/feishu-create-with-content-en` - Files changed: 3 - Key files: - `extensions/feishu/src/doc-schema.ts` - `extensions/feishu/src/docx.test.ts` - `extensions/feishu/src/docx.ts` ## Test Plan - Suggested local command: - `./node_modules/.bin/vitest run extensions/feishu/src/docx.test.ts` - Validation status: - [ ] CI checks pass - [ ] Maintainer re-ran local tests ## Risk & Rollback - Risk: low to medium; impact limited to touched module(s). - Rollback: revert this PR commit(s) cleanly. ## Co-authorship - Co-authored by @ciberponk and Codex (GPT-5). <!-- greptile_comment --> <h3>Greptile Summary</h3> Added optional `content` parameter to the `create` action in `feishu_doc` tool, allowing users to create a document and write initial content in a single operation. When `content` is provided, the implementation creates the document via `createDoc`, then immediately calls `writeDoc` to populate it. - Added `content: Type.Optional(Type.String(...))` to the create action schema - Modified create case handler to conditionally call `writeDoc` and merge results - Added test coverage for the happy path scenario Critical issue: if `writeDoc` throws after `createDoc` succeeds, the error propagates to the outer catch block which returns only `{ error: "..." }`, losing the `document_id` of the already-created document. This makes recovery difficult. <h3>Confidence Score: 3/5</h3> - Safe to merge with known limitation in error handling - The feature implementation is straightforward and the happy path works correctly. However, the error handling issue where `document_id` is lost when `writeDoc` fails after successful `createDoc` is a functional defect that could make debugging and recovery difficult. The PR is low-risk for breaking existing functionality since it only adds an optional parameter, but the error handling gap prevents a higher score. - extensions/feishu/src/docx.ts requires error handling improvement for the create-with-content flow _{Last reviewed commit: 70aa36a} <!-- greptile_other_comments_section --> <!-- /greptile_comment -->