Add local static-server launch config for browser preview

Lets the site be served on localhost for testing (e.g. verifying
font/CSP fixes) without needing a separate dev setup.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.claude/launch.json

@@ -0,0 +1,11 @@
+{
+  "version": "0.0.1",
+  "configurations": [
+    {
+      "name": "static-site",
+      "runtimeExecutable": "python",
+      "runtimeArgs": ["-m", "http.server", "8123"],
+      "port": 8123
+    }
+  ]
+}