update dependencies and remove test credentials from Login component

package-lock.json

@@ -8,6 +8,7 @@
       "name": "pecan_experiments",
       "version": "0.0.0",
       "dependencies": {
+        "@heroicons/react": "^2.2.0",
         "@supabase/supabase-js": "^2.52.0",
         "@tailwindcss/vite": "^4.1.11",
         "react": "^19.1.0",
@@ -893,6 +894,15 @@
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }
     },
+    "node_modules/@heroicons/react": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/@heroicons/react/-/react-2.2.0.tgz",
+      "integrity": "sha512-LMcepvRaS9LYHJGsF0zzmgKCUim/X3N/DQKc4jepAXJ7l8QxJ1PmxJzqplF2Z3FE4PqBAIGyJAQ/w4B5dsqbtQ==",
+      "license": "MIT",
+      "peerDependencies": {
+        "react": ">= 16 || ^19.0.0-rc"
+      }
+    },
     "node_modules/@humanfs/core": {
       "version": "0.19.1",
       "resolved": "https://registry.npmjs.org/@humanfs/core/-/core-0.19.1.tgz",