perf: typing in the chat input no longer freezes after pasting large text (#33729)

Converting 16,000 pasted lines to Markdown now takes 74 ms instead of 8.6 seconds, with byte-identical output. The converter got about 4x slower each time the text doubled, so every keystroke in the chat input after a large paste took seconds; its latest release fixes that and this is a plain version bump.

| Pasted lines | Before | After |
|---|---|---|
| 16,000 | 8,634 ms | 74 ms |
| 8,000 | 2,232 ms | 39 ms |
| 4,000 | 575 ms | 17 ms |
| 1,000 | 31 ms | 16 ms |

Related to #12087.

package-lock.json

@@ -105,7 +105,7 @@
 				"svelte-sonner": "^0.3.19",
 				"three": "0.186.1",
 				"tippy.js": "^6.3.7",
-				"turndown": "^7.2.0",
+				"turndown": "^7.2.5",
 				"turndown-plugin-gfm": "^1.0.2",
 				"undici": "^7.28.0",
 				"uuid": "^11.1.1",
@@ -14715,12 +14715,16 @@
 			}
 		},
 		"node_modules/turndown": {
-			"version": "7.2.2",
-			"resolved": "https://registry.npmjs.org/turndown/-/turndown-7.2.2.tgz",
-			"integrity": "sha512-1F7db8BiExOKxjSMU2b7if62D/XOyQyZbPKq/nUwopfgnHlqXHqQ0lvfUTeUIr1lZJzOPFn43dODyMSIfvWRKQ==",
+			"version": "7.2.5",
+			"resolved": "https://registry.npmjs.org/turndown/-/turndown-7.2.5.tgz",
+			"integrity": "sha512-EKZvCCFHh8sWttpAMs10U6niZFJ2cpz8LkCPlylxoG4JcHF50J7EHnnBW3AY1qXtUMu7kDjCp7dnggB1sIbqEQ==",
 			"license": "MIT",
 			"dependencies": {
 				"@mixmark-io/domino": "^2.2.0"
+			},
+			"engines": {
+				"node": ">=18",
+				"npm": ">=9"
 			}
 		},
 		"node_modules/turndown-plugin-gfm": {

package.json

@@ -157,7 +157,7 @@
 		"svelte-sonner": "^0.3.19",
 		"three": "0.186.1",
 		"tippy.js": "^6.3.7",
-		"turndown": "^7.2.0",
+		"turndown": "^7.2.5",
 		"turndown-plugin-gfm": "^1.0.2",
 		"undici": "^7.28.0",
 		"uuid": "^11.1.1",