Add a mock API with made-up data to look at the console

dev/mock-api.mjs answers the endpoints the screens call, with surrogate data, and keeps
what is changed in memory (zones, scopes, users, groups, rules, sessions, the cache).
`npm run mock` starts it on 127.0.0.1:5380, where the dev server's proxy already points.
.claude/launch.json starts the mock and the console together in the preview pane.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.claude/launch.json

@@ -0,0 +1,17 @@
+{
+  "version": "0.0.1",
+  "configurations": [
+    {
+      "name": "mock-api",
+      "runtimeExecutable": "node",
+      "runtimeArgs": ["dev/mock-api.mjs"],
+      "port": 5380
+    },
+    {
+      "name": "console-dev",
+      "runtimeExecutable": "npx",
+      "runtimeArgs": ["vite", "--port", "5173"],
+      "port": 5173
+    }
+  ]
+}