chore: expand allowed Claude local commands

Add additional allowed commands to .claude/settings.local.json so the
assistant can run frontend build and view file contents during local
debugging. Specifically, permit Bash(npm run build:frontend:*) and
Bash(cat:*) alongside the existing WebFetch(domain:www.electronjs.org).

This change enables local automation for building the frontend and
inspecting files, improving developer workflow and troubleshooting
without broadening external network permissions.

.claude/settings.local.json

@@ -3,7 +3,9 @@
     "allow": [
       "Bash(tree:*)",
       "WebSearch",
-      "WebFetch(domain:www.electronjs.org)"
+      "WebFetch(domain:www.electronjs.org)",
+      "Bash(npm run build:frontend:*)",
+      "Bash(cat:*)"
     ],
     "deny": [],
     "ask": []