Fix login blank screen and progress persistence

- Fix authStore to persist user data, not just isAuthenticated
- Fix progressStore handling of undefined API responses
- Remove minimax.md documentation file
- All progress now properly saves to PostgreSQL
- Login flow working correctly

frontend/package-lock.json

@@ -9,6 +9,7 @@
       "version": "1.0.0",
       "dependencies": {
         "axios": "^1.6.2",
+        "framer-motion": "^12.34.0",
         "lucide-react": "^0.294.0",
         "react": "^18.2.0",
         "react-dom": "^18.2.0",
@@ -1809,6 +1810,33 @@
         "url": "https://github.com/sponsors/rawify"
       }
     },
+    "node_modules/framer-motion": {
+      "version": "12.34.0",
+      "resolved": "https://registry.npmjs.org/framer-motion/-/framer-motion-12.34.0.tgz",
+      "integrity": "sha512-+/H49owhzkzQyxtn7nZeF4kdH++I2FWrESQ184Zbcw5cEqNHYkE5yxWxcTLSj5lNx3NWdbIRy5FHqUvetD8FWg==",
+      "license": "MIT",
+      "dependencies": {
+        "motion-dom": "^12.34.0",
+        "motion-utils": "^12.29.2",
+        "tslib": "^2.4.0"
+      },
+      "peerDependencies": {
+        "@emotion/is-prop-valid": "*",
+        "react": "^18.0.0 || ^19.0.0",
+        "react-dom": "^18.0.0 || ^19.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@emotion/is-prop-valid": {
+          "optional": true
+        },
+        "react": {
+          "optional": true
+        },
+        "react-dom": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/fsevents": {
       "version": "2.3.3",
       "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
@@ -2153,6 +2181,21 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/motion-dom": {
+      "version": "12.34.0",
+      "resolved": "https://registry.npmjs.org/motion-dom/-/motion-dom-12.34.0.tgz",
+      "integrity": "sha512-Lql3NuEcScRDxTAO6GgUsRHBZOWI/3fnMlkMcH5NftzcN37zJta+bpbMAV9px4Nj057TuvRooMK7QrzMCgtz6Q==",
+      "license": "MIT",
+      "dependencies": {
+        "motion-utils": "^12.29.2"
+      }
+    },
+    "node_modules/motion-utils": {
+      "version": "12.29.2",
+      "resolved": "https://registry.npmjs.org/motion-utils/-/motion-utils-12.29.2.tgz",
+      "integrity": "sha512-G3kc34H2cX2gI63RqU+cZq+zWRRPSsNIOjpdl9TN4AQwC4sgwYPl/Q/Obf/d53nOm569T0fYK+tcoSV50BWx8A==",
+      "license": "MIT"
+    },
     "node_modules/ms": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -2850,6 +2893,12 @@
       "dev": true,
       "license": "Apache-2.0"
     },
+    "node_modules/tslib": {
+      "version": "2.8.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
+      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
+      "license": "0BSD"
+    },
     "node_modules/typescript": {
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",