build(chat): consume @cacheplane/partial-markdown 0.5.0 (streaming open-line)

Bumps ^0.4.1 → ^0.5.0 so the chat picks up B.2: the open (unterminated) line now
renders mid-stream (parser.root grafts the parsed open line marked 'streaming')
instead of buffering until a newline — smoother streaming for long paragraphs.
The chat already consumes materialize(parser.root), so no code change needed.
Chat unit suite green (898 passed), no platform bindings dropped.

Author: blove

libs/chat/package.json

@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "@cacheplane/partial-json": ">=0.1.1 <0.3.0",
-    "@cacheplane/partial-markdown": "^0.4.1"
+    "@cacheplane/partial-markdown": "^0.5.0"
   },
   "peerDependencies": {
     "zod": "^3.25.0",

package-lock.json

@@ -113,7 +113,7 @@
     "@angular/platform-browser": "~21.1.0",
     "@angular/router": "~21.1.0",
     "@cacheplane/partial-json": "^0.1.1",
-    "@cacheplane/partial-markdown": "^0.4.1",
+    "@cacheplane/partial-markdown": "^0.5.0",
     "@langchain/core": "^1.1.33",
     "@langchain/langgraph-sdk": "^1.7.4",
     "@neondatabase/serverless": "^0.10.0",