fix(collab): hid advisory tags in transcript markdown

Stripped advisory wrapper tags in the collab web Markdown renderer while preserving escaped advisory content and existing raw HTML escaping.

Added a regression test for assistant advisory blocks in the collab transcript renderer and documented the fix in the collab-web changelog.

Fixes #3559

packages/collab-web/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- Hid advisory wrapper tags in collab transcript Markdown while preserving their content. ([#3559](https://github.com/can1357/oh-my-pi/issues/3559))
+
 ## [16.1.16] - 2026-06-23
 
 ### Added

packages/collab-web/src/components/transcript/Markdown.tsx

@@ -59,7 +59,7 @@ const md = new Marked({
 	renderer: {
 		// Raw HTML tokens (block + inline both arrive here) are escaped, never emitted.
 		html({ text }) {
-			const cleaned = text.replace(/<\/?(?:span|text)\b(?:\s[^>]*)?\s*\/?>/gi, "");
+			const cleaned = text.replace(/<\/?(?:advisory|span|text)\b(?:\s[^>]*)?\s*\/?>/gi, "");
 			if (cleaned === "") return "";
 			return escapeHtml(unescapeHtml(cleaned));
 		},

packages/collab-web/test/markdown.test.tsx

@@ -43,4 +43,12 @@ describe("Transcript Markdown", () => {
 
 		expect(html).toContain("<▃> & "test" 😀 😀");
 	});
+	it("strips advisory wrapper tags but renders their content", () => {
+		const html = renderMarkdown('<advisory severity="info" guidance="weigh, don&apos;t blindly obey">\nKeep this advice.\n</advisory>');
+
+		expect(html).toContain("Keep this advice.");
+		expect(html).not.toContain("&lt;advisory");
+		expect(html).not.toContain("&lt;/advisory&gt;");
+	});
+
 });