feat(feishu): render post rich text as markdown (openclaw#12755)

* feat(feishu): parse post rich text as markdown

* chore: rerun ci

* Feishu: resolve post parser rebase conflicts and gate fixes

---------

Co-authored-by: Wilson Liu <wilson.liu@example.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

extensions/feishu/src/post.test.ts

@@ -0,0 +1,103 @@
+import { describe, expect, it } from "vitest";
+import { parsePostContent } from "./post.js";
+
+describe("parsePostContent", () => {
+  it("renders title and styled text as markdown", () => {
+    const content = JSON.stringify({
+      title: "Daily *Plan*",
+      content: [
+        [
+          { tag: "text", text: "Bold", style: { bold: true } },
+          { tag: "text", text: " " },
+          { tag: "text", text: "Italic", style: { italic: true } },
+          { tag: "text", text: " " },
+          { tag: "text", text: "Underline", style: { underline: true } },
+          { tag: "text", text: " " },
+          { tag: "text", text: "Strike", style: { strikethrough: true } },
+          { tag: "text", text: " " },
+          { tag: "text", text: "Code", style: { code: true, bold: true } },
+        ],
+      ],
+    });
+
+    const result = parsePostContent(content);
+
+    expect(result.textContent).toBe(
+      "Daily \\*Plan\\*\n\n**Bold** *Italic* <u>Underline</u> ~~Strike~~ `Code`",
+    );
+    expect(result.imageKeys).toEqual([]);
+    expect(result.mentionedOpenIds).toEqual([]);
+  });
+
+  it("renders links and mentions", () => {
+    const content = JSON.stringify({
+      title: "",
+      content: [
+        [
+          { tag: "a", text: "Docs [v2]", href: "https://example.com/guide(a)" },
+          { tag: "text", text: " " },
+          { tag: "at", user_name: "alice_bob" },
+          { tag: "text", text: " " },
+          { tag: "at", open_id: "ou_123" },
+          { tag: "text", text: " " },
+          { tag: "a", href: "https://example.com/no-text" },
+        ],
+      ],
+    });
+
+    const result = parsePostContent(content);
+
+    expect(result.textContent).toBe(
+      "[Docs \\[v2\\]](https://example.com/guide(a)) @alice\\_bob @ou\\_123 [https://example.com/no\\-text](https://example.com/no-text)",
+    );
+    expect(result.mentionedOpenIds).toEqual(["ou_123"]);
+  });
+
+  it("inserts image placeholders and collects image keys", () => {
+    const content = JSON.stringify({
+      title: "",
+      content: [
+        [
+          { tag: "text", text: "Before " },
+          { tag: "img", image_key: "img_1" },
+          { tag: "text", text: " after" },
+        ],
+        [{ tag: "img", image_key: "img_2" }],
+      ],
+    });
+
+    const result = parsePostContent(content);
+
+    expect(result.textContent).toBe("Before ![image] after\n![image]");
+    expect(result.imageKeys).toEqual(["img_1", "img_2"]);
+    expect(result.mentionedOpenIds).toEqual([]);
+  });
+
+  it("supports locale wrappers", () => {
+    const wrappedByPost = JSON.stringify({
+      post: {
+        zh_cn: {
+          title: "标题",
+          content: [[{ tag: "text", text: "内容A" }]],
+        },
+      },
+    });
+    const wrappedByLocale = JSON.stringify({
+      zh_cn: {
+        title: "标题",
+        content: [[{ tag: "text", text: "内容B" }]],
+      },
+    });
+
+    expect(parsePostContent(wrappedByPost)).toEqual({
+      textContent: "标题\n\n内容A",
+      imageKeys: [],
+      mentionedOpenIds: [],
+    });
+    expect(parsePostContent(wrappedByLocale)).toEqual({
+      textContent: "标题\n\n内容B",
+      imageKeys: [],
+      mentionedOpenIds: [],
+    });
+  });
+});