chore: remove unused modules and ignore local env and coverage output

src/api/piContract.ts and src/hooks/usePanelResizeStatus.ts have no importers (knip and grep).

.gitignore

@@ -7,3 +7,8 @@ tmp/
 .DS_Store
 Thumbs.db
 .pi-lens/
+
+# Local env and test output
+.env
+.env.local
+coverage/