chore: stop tracking .claude/settings.local.json

This file holds per-user Claude Code permission allowlists and should not
be shared across the team. Adding it to .gitignore and removing from the
index; existing working copies are preserved.

.gitignore

@@ -1,17 +1,20 @@
-# Workspace/editor
-.vscode/
-frontend-web/.vscode/
-
-# Local runtime logs and pid files
-.runtime/
+# Workspace/editor
+.vscode/
+frontend-web/.vscode/
+
+# Claude Code local-only settings (per-user permissions, not shared)
+.claude/settings.local.json
+
+# Local runtime logs and pid files
+.runtime/
 
 # Frontend local/runtime artifacts
-frontend-web/.env
-frontend-web/node_modules/
-frontend-web/.pnpm-store/
-frontend-web/tsconfig.tsbuildinfo
-frontend-web/vite-dev.log
-frontend-web/vite-dev.err.log
+frontend-web/.env
+frontend-web/node_modules/
+frontend-web/.pnpm-store/
+frontend-web/tsconfig.tsbuildinfo
+frontend-web/vite-dev.log
+frontend-web/vite-dev.err.log
 
 # Frontend local packages/archives/docs (non-source)
 frontend-web/pnpm-lock.yaml
@@ -52,11 +55,11 @@ offline-backend-20260512/config.yaml
 offline-backend-20260512/config.yaml.example
 offline-backend-20260512/data/
 offline-backend-20260512/deerflow-backend-offline-image-20260505.tar
-offline-backend-20260512/extensions_config.json
-offline-backend-20260512/skills/
-offline-backend-20260512/wheelhouse/
-offline-backend-20260512/backend/.deer-flow/data/*.db
-offline-backend-20260512/backend/.deer-flow/data/*.db-*
-offline-backend-20260512/start_backend.sh
-offline-backend-20260512/stop_backend.sh
-offline-backend-20260512/check_backend.sh
+offline-backend-20260512/extensions_config.json
+offline-backend-20260512/skills/
+offline-backend-20260512/wheelhouse/
+offline-backend-20260512/backend/.deer-flow/data/*.db
+offline-backend-20260512/backend/.deer-flow/data/*.db-*
+offline-backend-20260512/start_backend.sh
+offline-backend-20260512/stop_backend.sh
+offline-backend-20260512/check_backend.sh