From 6ec5803e953534c077f863d723972c78796fe16a Mon Sep 17 00:00:00 2001
From: Adam Malczewski <github@tradam.dev>
Date: Wed, 20 May 2026 13:31:58 +0900
Subject: fix: gemini review — XSS sanitization, collapse-arrow padding,
 redundant alias
MIME-Version: 1.0
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---
 bun.lock                                                     | 6 ++++++
 packages/frontend/package.json                               | 2 ++
 packages/frontend/src/lib/components/ChatMessage.svelte      | 2 +-
 packages/frontend/src/lib/components/MarkdownRenderer.svelte | 6 +++---
 4 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/bun.lock b/bun.lock
index 44cf8c2..a728a8b 100644
--- a/bun.lock
+++ b/bun.lock
@@ -39,6 +39,7 @@
       "name": "@dispatch/frontend",
       "version": "0.0.1",
       "dependencies": {
+        "dompurify": "^3.4.5",
         "highlight.js": "^11.11.1",
         "marked": "^18.0.4",
         "marked-highlight": "^2.2.4",
@@ -47,6 +48,7 @@
       "devDependencies": {
         "@sveltejs/vite-plugin-svelte": "^5.0.0",
         "@tailwindcss/vite": "^4.0.0",
+        "@types/dompurify": "^3.2.0",
         "daisyui": "^5.0.0",
         "svelte-check": "^4.0.0",
         "tailwindcss": "^4.0.0",
@@ -247,6 +249,8 @@
 
     "@types/diff-match-patch": ["@types/diff-match-patch@1.0.36", "", {}, "sha512-xFdR6tkm0MWvBfO8xXCSsinYxHcqkQUlcHeSpMC2ukzOb6lwQAfDmW+Qt0AvlGd8HpsS28qKsB+oPeJn9I39jg=="],
 
+    "@types/dompurify": ["@types/dompurify@3.2.0", "", { "dependencies": { "dompurify": "*" } }, "sha512-Fgg31wv9QbLDA0SpTOXO3MaxySc4DKGLi8sna4/Utjo4r3ZRPdCt4UQee8BWr+Q5z21yifghREPJGYaEOEIACg=="],
+
     "@types/estree": ["@types/estree@1.0.8", "", {}, "sha512-dWHzHa2WqEXI/O1E9OjrocMTKJl2mSrEolh1Iomrv6U+JuNwaHXsXx9bLu5gG7BUWFIN0skIQJQ/L1rIex4X6w=="],
 
     "@types/node": ["@types/node@25.9.0", "", { "dependencies": { "undici-types": ">=7.24.0 <7.24.7" } }, "sha512-AOQwYUNolgy3VosiRqXrACUXTN8nJUtPl7FJXMqZVyxiiCLhQuG3jXKvCS1ALr+Y2OmZhzzLVlYPEqJaiqkaJQ=="],
@@ -307,6 +311,8 @@
 
     "diff-match-patch": ["diff-match-patch@1.0.5", "", {}, "sha512-IayShXAgj/QMXgB0IWmKx+rOPuGMhqm5w6jvFxmVenXKIzRqTAAsbBPT3kWQeGANj3jGgvcvv4yK6SxqYmikgw=="],
 
+    "dompurify": ["dompurify@3.4.5", "", { "optionalDependencies": { "@types/trusted-types": "^2.0.7" } }, "sha512-OrwIBKsdNSVEeubdJ1HBv/wNENRM9ytAVCv7YXt//A3vPdVMNuACRqK9mXCGCBW2ln7BT/A4X0jXHo2Gu89miA=="],
+
     "enhanced-resolve": ["enhanced-resolve@5.21.4", "", { "dependencies": { "graceful-fs": "^4.2.4", "tapable": "^2.3.3" } }, "sha512-wE4fDO8OjJhrPFH69HUQStq5oKvGRTNXEyW+k5C/pUQLASSsTu7obd2V3GvCDgPcY9AWjhJ4jz9Kh7iRvrxhJg=="],
 
     "es-module-lexer": ["es-module-lexer@1.7.0", "", {}, "sha512-jEQoCwk8hyb2AZziIOLhDqpm5+2ww5uIE6lkO/6jcOCusfk6LhMHpXXfBLXTZ7Ydyt0j4VoUQv6uGNYbdW+kBA=="],
diff --git a/packages/frontend/package.json b/packages/frontend/package.json
index 2b68692..37b794d 100644
--- a/packages/frontend/package.json
+++ b/packages/frontend/package.json
@@ -12,6 +12,7 @@
 		"typecheck": "svelte-check --tsconfig ./tsconfig.json"
 	},
 	"dependencies": {
+		"dompurify": "^3.4.5",
 		"highlight.js": "^11.11.1",
 		"marked": "^18.0.4",
 		"marked-highlight": "^2.2.4",
@@ -20,6 +21,7 @@
 	"devDependencies": {
 		"@sveltejs/vite-plugin-svelte": "^5.0.0",
 		"@tailwindcss/vite": "^4.0.0",
+		"@types/dompurify": "^3.2.0",
 		"daisyui": "^5.0.0",
 		"svelte-check": "^4.0.0",
 		"tailwindcss": "^4.0.0",
diff --git a/packages/frontend/src/lib/components/ChatMessage.svelte b/packages/frontend/src/lib/components/ChatMessage.svelte
index 1b92de3..09182f3 100644
--- a/packages/frontend/src/lib/components/ChatMessage.svelte
+++ b/packages/frontend/src/lib/components/ChatMessage.svelte
@@ -13,7 +13,7 @@ const isUser = $derived(message.role === "user");
 		{#if message.thinking}
 			<div class="collapse collapse-arrow mb-2">
 				<input type="checkbox" />
-				<div class="collapse-title text-sm opacity-60 italic p-0 min-h-0">Thinking...</div>
+				<div class="collapse-title text-sm opacity-60 italic py-0 pl-0 pr-8 min-h-0">Thinking...</div>
 				<div class="collapse-content text-sm opacity-60 italic p-0">
 					<p class="whitespace-pre-wrap mt-1">{message.thinking}</p>
 				</div>
diff --git a/packages/frontend/src/lib/components/MarkdownRenderer.svelte b/packages/frontend/src/lib/components/MarkdownRenderer.svelte
index 88dd42a..f9925c6 100644
--- a/packages/frontend/src/lib/components/MarkdownRenderer.svelte
+++ b/packages/frontend/src/lib/components/MarkdownRenderer.svelte
@@ -1,6 +1,7 @@
 <script lang="ts">
 	import { Marked } from "marked";
 	import { markedHighlight } from "marked-highlight";
+	import DOMPurify from "dompurify";
 	import hljs from "highlight.js/lib/core";
 	// Hot set — matches roughly what ChatGPT preloads. Registered eagerly so
 	// common code blocks highlight on first paint without a network roundtrip.
@@ -71,7 +72,6 @@
 		svg: "xml",
 		md: "markdown",
 		mdx: "markdown",
-		dockerfile: "dockerfile",
 		golang: "go",
 		rs: "rust",
 		kt: "kotlin",
@@ -159,8 +159,8 @@
 		const myToken = ++renderToken;
 		(async () => {
 			try {
-				const result = (await md.parse(src)) as string;
-				if (myToken === renderToken) html = result;
+				const raw = (await md.parse(src)) as string;
+				if (myToken === renderToken) html = DOMPurify.sanitize(raw);
 			} catch {
 				// swallow — keeps last successful render visible
 			}
-- 
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