Move to single .env file

.claude/settings.json

@@ -0,0 +1,10 @@
+{
+  "enabledPlugins": {
+    "payload@payload-marketplace": true,
+    "frontend-design@claude-plugins-official": true,
+    "superpowers@claude-plugins-official": true,
+    "context7@claude-plugins-official": true,
+    "claude-md-management@claude-plugins-official": true,
+    "waynesutton-convex-skills@cpd-waynesutton-convex-skills": true
+  }
+}