Address CI failures and review feedback

- Regenerate lockfile under Node 22 (CI's runtime) so npm ci succeeds
- Pin @hono/node-server override to exact 1.19.10
- Remove unused mkdirSync import from dedup-store test
- Use real stripHtml in agent-tools mock so test expectations match
  runtime behavior
- Add exclusive-create flag (wx) to cursors temp file write

Author: jeremy

biome.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.4.5/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.4.6/schema.json",
   "files": {
     "includes": ["src/**", "tests/**", "index.ts", "vitest.config.ts"]
   },