New "browse" UI

Also, separated out browse, ?meta, and ?module request handlers.

Fixes #82

modules/client/.eslintrc

@@ -2,12 +2,12 @@
   "env": {
     "browser": true
   },
-  "plugins": [
-    "react"
-  ],
+  "plugins": ["react", "react-hooks"],
   "rules": {
     "react/jsx-uses-react": "error",
-    "react/jsx-uses-vars": "error"
+    "react/jsx-uses-vars": "error",
+    "react-hooks/rules-of-hooks": "error",
+    "react-hooks/exhaustive-deps": "warn"
   },
   "settings": {
     "react": {