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

mcp/selectMode.ts

@@ -1,6 +1,6 @@
 import { type } from "arktype";
 import { formatMcpToolRef } from "../external.ts";
-import { PR_SUMMARY_FORMAT, type Mode } from "../modes.ts";
+import { type Mode, PR_SUMMARY_FORMAT } from "../modes.ts";
 import { apiFetch } from "../utils/apiFetch.ts";
 import { log } from "../utils/log.ts";
 import type { ToolContext } from "./server.ts";