fix lint errors, consolidate husky hooks into root .husky

action/.husky prepare script was overriding root husky config, so the
pre-push hook (lint + typecheck + test) never ran. merged the lockfile
sync pre-commit into root .husky/pre-commit and removed action/.husky.
also auto-fixed biome format/import-sort errors from last commit.

Made-with: Cursor

package.json

@@ -20,7 +20,7 @@
     "scratch": "node scratch.ts",
     "upDeps": "pnpm up --latest",
     "lock": "pnpm install --no-frozen-lockfile",
-    "prepare": "cd .. && husky action/.husky"
+    "prepare": "cd .. && husky"
   },
   "devDependencies": {
     "@actions/core": "^1.11.1",