fix: Pin dexie dependency to resolve version conflict

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

package.json

@@ -41,7 +41,7 @@
   },
   "dependencies": {
     "cancelable-promise": "^4.3.1",
-    "dexie": "^4.0.11",
+    "dexie": "4.0.11",
     "lodash-es": "4.17.21",
     "markdown-link-extractor": "^4.0.2",
     "minisearch": "7.1.0",