fix(bug): Could not find MIME for Buffer <null>

App.tsx

@@ -6,6 +6,7 @@
  */
 
 import React from 'react';
+import { Buffer } from 'buffer';
 import { StatusBar } from 'expo-status-bar';
 import { NavigationContainer } from '@react-navigation/native';
 import { GestureHandlerRootView } from 'react-native-gesture-handler';
@@ -15,6 +16,10 @@ import AuthNavigator from './src/navigation/AuthNavigator';
 import { AuthProvider, useAuth } from './src/context/AuthContext';
 import { colors } from './src/theme/colors';
 
+if (typeof globalThis !== 'undefined' && !globalThis.Buffer) {
+  globalThis.Buffer = Buffer;
+}
+
 /**
  * Loading screen shown while restoring auth state
  */

app.json

@@ -19,14 +19,10 @@
       "bundleIdentifier": "com.sentinel.app"
     },
     "android": {
-      "adaptiveIcon": {
-        "foregroundImage": "./assets/adaptive-icon.png",
-        "backgroundColor": "#459E9E"
-      },
       "package": "com.sentinel.app"
     },
     "web": {
-      "favicon": "./assets/favicon.png",
+      "favicon": "./assets/icon.png",
       "bundler": "metro"
     }
   }

package-lock.json

@@ -14,6 +14,8 @@
         "@react-navigation/bottom-tabs": "^6.6.1",
         "@react-navigation/native": "^6.1.18",
         "@react-navigation/native-stack": "^6.11.0",
+        "bip39": "^3.1.0",
+        "buffer": "^6.0.3",
         "expo": "~52.0.0",
         "expo-asset": "~11.0.5",
         "expo-constants": "~17.0.8",
@@ -80,7 +82,6 @@
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       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@babel/code-frame": "^7.28.6",
         "@babel/generator": "^7.28.6",
@@ -484,6 +485,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-bugfix-firefox-class-in-computed-class-key/-/plugin-bugfix-firefox-class-in-computed-class-key-7.28.5.tgz",
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.27.1",
         "@babel/traverse": "^7.28.5"
@@ -500,6 +502,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-bugfix-safari-class-field-initializer-scope/-/plugin-bugfix-safari-class-field-initializer-scope-7.27.1.tgz",
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.27.1"
       },
@@ -515,6 +518,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-bugfix-safari-id-destructuring-collision-in-function-expression/-/plugin-bugfix-safari-id-destructuring-collision-in-function-expression-7.27.1.tgz",
       "integrity": "sha512-g4L7OYun04N1WyqMNjldFwlfPCLVkgB54A/YCXICZYBsvJJE3kByKv9c9+R/nAfmIfjl2rKYLNyMHboYbZaWaA==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.27.1"
       },
@@ -530,6 +534,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining/-/plugin-bugfix-v8-spread-parameters-in-optional-chaining-7.27.1.tgz",
       "integrity": "sha512-oO02gcONcD5O1iTLi/6frMJBIwWEHceWGSGqrpCmEL8nogiS6J9PBlE48CaK20/Jx1LuRml9aDftLgdjXT8+Cw==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.27.1",
         "@babel/helper-skip-transparent-expression-wrappers": "^7.27.1",
@@ -547,6 +552,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-bugfix-v8-static-class-fields-redefine-readonly/-/plugin-bugfix-v8-static-class-fields-redefine-readonly-7.28.6.tgz",
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.28.6",
         "@babel/traverse": "^7.28.6"
@@ -647,6 +653,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-private-property-in-object/-/plugin-proposal-private-property-in-object-7.21.0-placeholder-for-preset-env.2.tgz",
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       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=6.9.0"
       },
@@ -767,6 +774,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-import-assertions/-/plugin-syntax-import-assertions-7.28.6.tgz",
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.28.6"
       },
@@ -953,6 +961,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-unicode-sets-regex/-/plugin-syntax-unicode-sets-regex-7.18.6.tgz",
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-create-regexp-features-plugin": "^7.18.6",
         "@babel/helper-plugin-utils": "^7.18.6"
@@ -1018,6 +1027,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-block-scoped-functions/-/plugin-transform-block-scoped-functions-7.27.1.tgz",
       "integrity": "sha512-cnqkuOtZLapWYZUYM5rVIdv1nXYuFVIltZ6ZJ7nIj585QsjKM5dhL2Fu/lICXZ1OyIAFc7Qy+bvDAtTXqGrlhg==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.27.1"
       },
@@ -1064,6 +1074,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-class-static-block/-/plugin-transform-class-static-block-7.28.6.tgz",
       "integrity": "sha512-rfQ++ghVwTWTqQ7w8qyDxL1XGihjBss4CmTgGRCTAC9RIbhVpyp4fOeZtta0Lbf+dTNIVJer6ych2ibHwkZqsQ==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-create-class-features-plugin": "^7.28.6",
         "@babel/helper-plugin-utils": "^7.28.6"
@@ -1132,6 +1143,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-dotall-regex/-/plugin-transform-dotall-regex-7.28.6.tgz",
       "integrity": "sha512-SljjowuNKB7q5Oayv4FoPzeB74g3QgLt8IVJw9ADvWy3QnUb/01aw8I4AVv8wYnPvQz2GDDZ/g3GhcNyDBI4Bg==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-create-regexp-features-plugin": "^7.28.5",
         "@babel/helper-plugin-utils": "^7.28.6"
@@ -1148,6 +1160,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-duplicate-keys/-/plugin-transform-duplicate-keys-7.27.1.tgz",
       "integrity": "sha512-MTyJk98sHvSs+cvZ4nOauwTTG1JeonDjSGvGGUNHreGQns+Mpt6WX/dVzWBHgg+dYZhkC4X+zTDfkTU+Vy9y7Q==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.27.1"
       },
@@ -1163,6 +1176,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-duplicate-named-capturing-groups-regex/-/plugin-transform-duplicate-named-capturing-groups-regex-7.28.6.tgz",
       "integrity": "sha512-5suVoXjC14lUN6ZL9OLKIHCNVWCrqGqlmEp/ixdXjvgnEl/kauLvvMO/Xw9NyMc95Joj1AeLVPVMvibBgSoFlA==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-create-regexp-features-plugin": "^7.28.5",
         "@babel/helper-plugin-utils": "^7.28.6"
@@ -1179,6 +1193,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-dynamic-import/-/plugin-transform-dynamic-import-7.27.1.tgz",
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.27.1"
       },
@@ -1194,6 +1209,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-explicit-resource-management/-/plugin-transform-explicit-resource-management-7.28.6.tgz",
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.28.6",
         "@babel/plugin-transform-destructuring": "^7.28.5"
@@ -1210,6 +1226,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-exponentiation-operator/-/plugin-transform-exponentiation-operator-7.28.6.tgz",
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.28.6"
       },
@@ -1289,6 +1306,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-json-strings/-/plugin-transform-json-strings-7.28.6.tgz",
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.28.6"
       },
@@ -1334,6 +1352,7 @@
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-member-expression-literals/-/plugin-transform-member-expression-literals-7.27.1.tgz",
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
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       },
@@ -1349,6 +1368,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
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         "@babel/helper-plugin-utils": "^7.27.1"
@@ -1381,6 +1401,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-module-transforms": "^7.28.3",
         "@babel/helper-plugin-utils": "^7.27.1",
@@ -1399,6 +1420,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
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@@ -1431,6 +1453,7 @@
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+      "peer": true,
       "dependencies": {
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       },
@@ -1495,6 +1518,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
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         "@babel/helper-replace-supers": "^7.27.1"
@@ -1590,6 +1614,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
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       },
@@ -1715,6 +1740,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
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@@ -1731,6 +1757,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
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       },
@@ -1827,6 +1854,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
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       },
@@ -1861,6 +1889,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.27.1"
       },
@@ -1876,6 +1905,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-create-regexp-features-plugin": "^7.28.5",
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@@ -1908,6 +1938,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/helper-create-regexp-features-plugin": "^7.28.5",
         "@babel/helper-plugin-utils": "^7.28.6"
@@ -2026,6 +2057,7 @@
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       "license": "MIT",
+      "peer": true,
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@@ -2643,7 +2675,6 @@
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       "license": "MIT",
-      "peer": true,
       "peerDependencies": {
         "react-native": "*"
       }
@@ -3180,6 +3211,18 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@noble/hashes": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/@noble/hashes/-/hashes-1.8.0.tgz",
+      "integrity": "sha512-jCs9ldd7NwzpgXDIf6P3+NrHh9/sD6CQdxHyjQI+h/6rDNo88ypBxxz45UDuZHz9r3tNz7N/VInSVoVdtXEI4A==",
+      "license": "MIT",
+      "engines": {
+        "node": "^14.21.3 || >=16"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
     "node_modules/@nodelib/fs.scandir": {
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       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -3688,7 +3731,6 @@
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-      "peer": true,
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@@ -3870,7 +3912,6 @@
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       "devOptional": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@types/prop-types": "*",
         "csstype": "^3.2.2"
@@ -4420,6 +4461,15 @@
         "node": ">=0.6"
       }
     },
+    "node_modules/bip39": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/bip39/-/bip39-3.1.0.tgz",
+      "integrity": "sha512-c9kiwdk45Do5GL0vJMe7tS95VjCii65mYAH7DfWl3uW8AVzXKQVUm64i3hzVybBDMp9r7j9iNxR85+ul8MdN/A==",
+      "license": "ISC",
+      "dependencies": {
+        "@noble/hashes": "^1.2.0"
+      }
+    },
     "node_modules/bplist-creator": {
       "version": "0.0.7",
       "resolved": "https://registry.npmjs.org/bplist-creator/-/bplist-creator-0.0.7.tgz",
@@ -4482,7 +4532,6 @@
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       "license": "MIT",
-      "peer": true,
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         "caniuse-lite": "^1.0.30001759",
@@ -4507,9 +4556,9 @@
       }
     },
     "node_modules/buffer": {
-      "version": "5.7.1",
+      "version": "6.0.3",
-      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-6.0.3.tgz",
-      "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
+      "integrity": "sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==",
       "funding": [
         {
           "type": "github",
@@ -4527,7 +4576,7 @@
       "license": "MIT",
       "dependencies": {
         "base64-js": "^1.3.1",
-        "ieee754": "^1.1.13"
+        "ieee754": "^1.2.1"
       }
     },
     "node_modules/buffer-alloc": {
@@ -5507,6 +5556,7 @@
       "resolved": "https://registry.npmjs.org/esutils/-/esutils-2.0.3.tgz",
       "integrity": "sha512-kVscqXk4OCp68SZ0dkgEKVi6/8ij300KBWTJq32P/dYeWTSwK41WyTxalN1eRmA5Z9UU/LX9D7FWSmV9SAYx6g==",
       "license": "BSD-2-Clause",
+      "peer": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -5631,7 +5681,6 @@
       "resolved": "https://registry.npmjs.org/expo/-/expo-52.0.48.tgz",
       "integrity": "sha512-/HR/vuo57KGEWlvF3GWaquwEAjXuA5hrOCsaLcZ3pMSA8mQ27qKd1jva4GWzpxXYedlzs/7LLP1XpZo6hXTsog==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@babel/runtime": "^7.20.0",
         "@expo/cli": "0.22.27",
@@ -9159,7 +9208,6 @@
       "resolved": "https://registry.npmjs.org/react/-/react-18.3.1.tgz",
       "integrity": "sha512-wS+hAgJShR0KhEvPJArfuPVN1+Hz1t0Y6n5jLrGQbkb4urgPE/0Rve+1kMB1v/oWgHgm4WIcV+i7F2pTVj+2iQ==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "loose-envify": "^1.1.0"
       },
@@ -9243,7 +9291,6 @@
       "resolved": "https://registry.npmjs.org/react-native/-/react-native-0.76.9.tgz",
       "integrity": "sha512-+LRwecWmTDco7OweGsrECIqJu0iyrREd6CTCgC/uLLYipiHvk+MH9nd6drFtCw/6Blz6eoKTcH9YTTJusNtrWg==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@jest/create-cache-key-function": "^29.6.3",
         "@react-native/assets-registry": "0.76.9",
@@ -9345,7 +9392,6 @@
       "resolved": "https://registry.npmjs.org/react-native-safe-area-context/-/react-native-safe-area-context-4.12.0.tgz",
       "integrity": "sha512-ukk5PxcF4p3yu6qMZcmeiZgowhb5AsKRnil54YFUUAXVIS7PJcMHGGC+q44fCiBg44/1AJk5njGMez1m9H0BVQ==",
       "license": "MIT",
-      "peer": true,
       "peerDependencies": {
         "react": "*",
         "react-native": "*"
@@ -9356,7 +9402,6 @@
       "resolved": "https://registry.npmjs.org/react-native-screens/-/react-native-screens-4.4.0.tgz",
       "integrity": "sha512-c7zc7Zwjty6/pGyuuvh9gK3YBYqHPOxrhXfG1lF4gHlojQSmIx2piNbNaV+Uykj+RDTmFXK0e/hA+fucw/Qozg==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "react-freeze": "^1.0.0",
         "warn-once": "^0.1.0"
@@ -11035,6 +11080,30 @@
         "node": ">=10"
       }
     },
+    "node_modules/whatwg-url-without-unicode/node_modules/buffer": {
+      "version": "5.7.1",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
+      "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.1.13"
+      }
+    },
     "node_modules/whatwg-url-without-unicode/node_modules/webidl-conversions": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-5.0.0.tgz",

package.json

@@ -15,6 +15,8 @@
     "@react-navigation/bottom-tabs": "^6.6.1",
     "@react-navigation/native": "^6.1.18",
     "@react-navigation/native-stack": "^6.11.0",
+    "bip39": "^3.1.0",
+    "buffer": "^6.0.3",
     "expo": "~52.0.0",
     "expo-asset": "~11.0.5",
     "expo-constants": "~17.0.8",

src/config/index.ts

@@ -27,7 +27,7 @@ export const DEBUG_MODE = true;
 /**
  * Base URL for the backend API server
  */
-export const API_BASE_URL = 'http://localhost:8000';
+export const API_BASE_URL = 'http://192.168.56.103:8000';
 
 /**
  * API request timeout in milliseconds
@@ -112,6 +112,7 @@ export const MOCK_CONFIG = {
   USER: {
     id: 999,
     username: 'MockCaptain',
+    email: 'captain@sentinel.local',
     public_key: 'mock_public_key',
     is_admin: true,
     guale: false,
@@ -137,6 +138,44 @@ export const AI_CONFIG = {
    * Mock response delay in milliseconds (for NO_BACKEND_MODE)
    */
   MOCK_RESPONSE_DELAY: 500,
+
+  /**
+   * AI Roles configuration
+   */
+  ROLES: [
+    {
+      id: 'reflective',
+      name: 'Reflective Assistant',
+      description: 'Helps you dive deep into your thoughts and feelings through meaningful reflection.',
+      systemPrompt: 'You are a helpful journal assistant. Help the user reflect on their thoughts and feelings.',
+      icon: 'journal-outline',
+      iconFamily: 'Ionicons',
+    },
+    {
+      id: 'creative',
+      name: 'Creative Spark',
+      description: 'A partner for brainstorming, creative writing, and exploring new ideas.',
+      systemPrompt: 'You are a creative brainstorming partner. Help the user explore new ideas, write stories, or look at things from a fresh perspective.',
+      icon: 'bulb-outline',
+      iconFamily: 'Ionicons',
+    },
+    {
+      id: 'planner',
+      name: 'Action Planner',
+      description: 'Focused on turning thoughts into actionable plans and organized goals.',
+      systemPrompt: 'You are a productivity coach. Help the user break down their thoughts into actionable steps and clear goals.',
+      icon: 'list-outline',
+      iconFamily: 'Ionicons',
+    },
+    {
+      id: 'empathetic',
+      name: 'Empathetic Guide',
+      description: 'Provides a safe, non-judgmental space for emotional support and empathy.',
+      systemPrompt: 'You are a supportive and empathetic friend. Listen to the user\'s concerns and provide emotional support without judgment.',
+      icon: 'heart-outline',
+      iconFamily: 'Ionicons',
+    },
+  ],
 } as const;
 
 // =============================================================================

src/context/AuthContext.tsx

@@ -9,6 +9,7 @@ import React, { createContext, useContext, useState, useEffect, ReactNode } from
 import AsyncStorage from '@react-native-async-storage/async-storage';
 import { User, LoginRequest, RegisterRequest } from '../types';
 import { authService } from '../services/auth.service';
+import { storageService } from '../services/storage.service';
 
 // =============================================================================
 // Type Definitions
@@ -137,12 +138,13 @@ export function AuthProvider({ children }: { children: ReactNode }) {
   };
 
   /**
-   * Sign out and clear stored auth
+   * Sign out and clear stored auth and session data
    */
   const signOut = () => {
     setUser(null);
     setToken(null);
     clearAuth();
+    //storageService.clearAllData();
   };
 
   return (

src/screens/FlowScreen.tsx

@@ -31,6 +31,8 @@ import * as ImagePicker from 'expo-image-picker';
 import { colors, typography, spacing, borderRadius, shadows } from '../theme/colors';
 import { aiService } from '../services/ai.service';
 import { useAuth } from '../context/AuthContext';
+import { AI_CONFIG } from '../config';
+import { storageService } from '../services/storage.service';
 
 // =============================================================================
 // Type Definitions
@@ -57,7 +59,7 @@ interface ChatSession {
 // =============================================================================
 
 export default function FlowScreen() {
-  const { token, signOut } = useAuth();
+  const { token, user, signOut } = useAuth();
   const scrollViewRef = useRef<ScrollView>(null);
 
   // Current conversation state
@@ -67,6 +69,11 @@ export default function FlowScreen() {
   const [isRecording, setIsRecording] = useState(false);
   const [selectedImage, setSelectedImage] = useState<string | null>(null);
 
+  // AI Role state
+  const [selectedRole, setSelectedRole] = useState(AI_CONFIG.ROLES[0]);
+  const [showRoleModal, setShowRoleModal] = useState(false);
+  const [expandedRoleId, setExpandedRoleId] = useState<string | null>(null);
+
   // History modal state
   const [showHistoryModal, setShowHistoryModal] = useState(false);
   const modalSlideAnim = useRef(new Animated.Value(0)).current;
@@ -104,14 +111,78 @@ export default function FlowScreen() {
     day: 'numeric'
   });
 
-  // Auto-scroll to bottom when new messages arrive
+  // Load history on mount
   useEffect(() => {
+    const loadHistory = async () => {
+      if (!user) return;
+      try {
+        console.log('[FlowScreen] Loading chat history...');
+        const savedHistory = await storageService.getChatHistory(user.id);
+        if (savedHistory && savedHistory.length > 0) {
+          const formattedHistory = savedHistory.map((session: any) => ({
+            ...session,
+            createdAt: new Date(session.createdAt),
+            updatedAt: new Date(session.updatedAt),
+            messages: session.messages.map((msg: any) => ({
+              ...msg,
+              createdAt: new Date(msg.createdAt)
+            }))
+          }));
+          setChatHistory(formattedHistory);
+          console.log('[FlowScreen] Chat history loaded:', formattedHistory.length, 'sessions');
+        } else {
+          console.log('[FlowScreen] No chat history found');
+        }
+      } catch (error) {
+        console.error('Failed to load history:', error);
+      }
+    };
+    loadHistory();
+  }, [user]);
+
+  // Load messages whenever role changes
+  useEffect(() => {
+    const loadRoleMessages = async () => {
+      if (!user) return;
+      try {
+        const savedMessages = await storageService.getCurrentChat(selectedRole.id, user.id);
+        if (savedMessages) {
+          const formattedMessages = savedMessages.map((msg: any) => ({
+            ...msg,
+            createdAt: new Date(msg.createdAt)
+          }));
+          setMessages(formattedMessages);
+        } else {
+          setMessages([]);
+        }
+      } catch (error) {
+        console.error(`Failed to load messages for role ${selectedRole.id}:`, error);
+        setMessages([]);
+      }
+    };
+
+    loadRoleMessages();
+  }, [selectedRole.id, user]);
+
+  // Save current messages for the active role when they change
+  useEffect(() => {
+    if (user && messages.length >= 0) { // Save even if empty to allow clearing
+      storageService.saveCurrentChat(selectedRole.id, messages, user.id);
+    }
+
     if (messages.length > 0) {
       setTimeout(() => {
         scrollViewRef.current?.scrollToEnd({ animated: true });
       }, 100);
     }
-  }, [messages]);
+  }, [messages, selectedRole.id, user]);
+
+  // Save history when it changes
+  useEffect(() => {
+    if (user) {
+      storageService.saveChatHistory(chatHistory, user.id);
+    }
+  }, [chatHistory, user]);
 
   // Modal animation control
   const openHistoryModal = () => {
@@ -168,8 +239,8 @@ export default function FlowScreen() {
     setMessages(prev => [...prev, userMsg]);
 
     try {
-      // Call AI proxy
+      // Call AI proxy with selected role's system prompt
-      const aiResponse = await aiService.sendMessage(userMessage, token);
+      const aiResponse = await aiService.sendMessage(userMessage, token, selectedRole.systemPrompt);
 
       // Add AI response
       const aiMsg: ChatMessage = {
@@ -335,8 +406,11 @@ export default function FlowScreen() {
       setChatHistory(prev => [newSession, ...prev]);
     }
 
-    // Clear current messages
+    // Clear current messages and storage for this role
     setMessages([]);
+    if (user) {
+      storageService.saveCurrentChat(selectedRole.id, [], user.id);
+    }
     closeHistoryModal();
   };
 
@@ -451,9 +525,9 @@ export default function FlowScreen() {
       <View style={styles.emptyIcon}>
         <Feather name="feather" size={48} color={colors.nautical.seafoam} />
       </View>
-      <Text style={styles.emptyTitle}>Start a conversation</Text>
+      <Text style={styles.emptyTitle}>Chatting with {selectedRole.name}</Text>
       <Text style={styles.emptySubtitle}>
-        Ask me anything or share your thoughts
+        {selectedRole.description}
       </Text>
     </View>
   );
@@ -505,6 +579,23 @@ export default function FlowScreen() {
               </View>
             </View>
 
+            {/* Role Header Dropdown */}
+            <TouchableOpacity
+              style={styles.headerRoleButton}
+              onPress={() => setShowRoleModal(true)}
+              activeOpacity={0.7}
+            >
+              <Ionicons
+                name={selectedRole.icon as any}
+                size={16}
+                color={colors.nautical.teal}
+              />
+              <Text style={styles.headerRoleText} numberOfLines={1}>
+                {selectedRole.name}
+              </Text>
+              <Ionicons name="chevron-down" size={14} color={colors.flow.textSecondary} />
+            </TouchableOpacity>
+
             {/* History Button */}
             <TouchableOpacity
               style={styles.historyButton}
@@ -607,7 +698,6 @@ export default function FlowScreen() {
         </SafeAreaView>
       </LinearGradient>
 
-      {/* History Modal - Background appears instantly, content slides up */}
       <Modal
         visible={showHistoryModal}
         animationType="none"
@@ -670,6 +760,89 @@ export default function FlowScreen() {
           </View>
         </TouchableWithoutFeedback>
       </Modal>
+
+      {/* Role Selection Modal */}
+      <Modal
+        visible={showRoleModal}
+        animationType="fade"
+        transparent
+        onRequestClose={() => setShowRoleModal(false)}
+      >
+        <TouchableWithoutFeedback onPress={() => setShowRoleModal(false)}>
+          <View style={styles.modalOverlay}>
+            <TouchableWithoutFeedback onPress={(e) => e.stopPropagation()}>
+              <View style={[styles.modalContent, styles.roleModalContent]}>
+                <View style={styles.modalHandle} />
+                <Text style={styles.modalTitle}>Choose AI Assistant</Text>
+
+                <ScrollView style={styles.roleList} showsVerticalScrollIndicator={false}>
+                  {AI_CONFIG.ROLES.map((role) => (
+                    <View key={role.id} style={styles.roleItemContainer}>
+                      <View
+                        style={[
+                          styles.roleItem,
+                          selectedRole.id === role.id && styles.roleItemActive
+                        ]}
+                      >
+                        <TouchableOpacity
+                          style={styles.roleSelectionArea}
+                          onPress={() => {
+                            setSelectedRole(role as any);
+                            setShowRoleModal(false);
+                          }}
+                        >
+                          <View style={[
+                            styles.roleItemIcon,
+                            selectedRole.id === role.id && styles.roleItemIconActive
+                          ]}>
+                            <Ionicons
+                              name={role.icon as any}
+                              size={20}
+                              color={selectedRole.id === role.id ? '#fff' : colors.nautical.teal}
+                            />
+                          </View>
+                          <Text style={[
+                            styles.roleItemName,
+                            selectedRole.id === role.id && styles.roleItemNameActive
+                          ]}>
+                            {role.name}
+                          </Text>
+                        </TouchableOpacity>
+
+                        <TouchableOpacity
+                          style={styles.infoButton}
+                          onPress={() => {
+                            setExpandedRoleId(expandedRoleId === role.id ? null : role.id);
+                          }}
+                        >
+                          <Ionicons
+                            name={expandedRoleId === role.id ? "close-circle-outline" : "information-circle-outline"}
+                            size={24}
+                            color={expandedRoleId === role.id ? colors.nautical.coral : colors.flow.textSecondary}
+                          />
+                        </TouchableOpacity>
+                      </View>
+
+                      {expandedRoleId === role.id && (
+                        <View style={styles.roleDescription}>
+                          <Text style={styles.roleDescriptionText}>{role.description}</Text>
+                        </View>
+                      )}
+                    </View>
+                  ))}
+                </ScrollView>
+
+                <TouchableOpacity
+                  style={styles.closeButton}
+                  onPress={() => setShowRoleModal(false)}
+                >
+                  <Text style={styles.closeButtonText}>Cancel</Text>
+                </TouchableOpacity>
+              </View>
+            </TouchableWithoutFeedback>
+          </View>
+        </TouchableWithoutFeedback>
+      </Modal>
     </View>
   );
 }
@@ -697,12 +870,33 @@ const styles = StyleSheet.create({
     alignItems: 'center',
     paddingHorizontal: spacing.base,
     paddingTop: spacing.sm,
-    paddingBottom: spacing.md,
+    paddingBottom: spacing.sm,
+    borderBottomWidth: 1,
+    borderBottomColor: 'rgba(0,0,0,0.05)',
   },
   headerLeft: {
     flexDirection: 'row',
     alignItems: 'center',
     gap: spacing.sm,
+    flex: 1,
+  },
+  headerRoleButton: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    backgroundColor: colors.flow.cardBackground,
+    paddingHorizontal: spacing.sm,
+    paddingVertical: 6,
+    borderRadius: borderRadius.full,
+    marginHorizontal: spacing.sm,
+    borderWidth: 1,
+    borderColor: colors.flow.cardBorder,
+    maxWidth: '40%',
+  },
+  headerRoleText: {
+    fontSize: typography.fontSize.xs,
+    fontWeight: '600',
+    color: colors.flow.text,
+    marginHorizontal: 4,
   },
   iconCircle: {
     width: 44,
@@ -773,6 +967,96 @@ const styles = StyleSheet.create({
     textAlign: 'center',
   },
 
+  // Role selection styles
+  roleDropdown: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    backgroundColor: colors.flow.cardBackground,
+    paddingHorizontal: spacing.md,
+    paddingVertical: spacing.sm,
+    borderRadius: borderRadius.lg,
+    marginBottom: spacing.md,
+    ...shadows.soft,
+    borderWidth: 1,
+    borderColor: colors.flow.cardBorder,
+  },
+  roleIcon: {
+    marginRight: spacing.sm,
+  },
+  roleDropdownText: {
+    fontSize: typography.fontSize.base,
+    fontWeight: '600',
+    color: colors.flow.text,
+    marginRight: spacing.xs,
+  },
+  roleModalContent: {
+    paddingBottom: spacing.xl,
+  },
+  roleList: {
+    marginTop: spacing.sm,
+    maxHeight: 400,
+  },
+  roleItemContainer: {
+    marginBottom: spacing.sm,
+  },
+  roleItem: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'space-between',
+    borderRadius: borderRadius.lg,
+    backgroundColor: 'transparent',
+    borderWidth: 1,
+    borderColor: 'transparent',
+    overflow: 'hidden',
+  },
+  roleItemActive: {
+    backgroundColor: colors.nautical.paleAqua,
+    borderColor: colors.nautical.lightMint,
+  },
+  roleSelectionArea: {
+    flex: 1,
+    flexDirection: 'row',
+    alignItems: 'center',
+    padding: spacing.md,
+  },
+  roleItemIcon: {
+    width: 36,
+    height: 36,
+    borderRadius: 18,
+    backgroundColor: colors.flow.backgroundGradientStart,
+    justifyContent: 'center',
+    alignItems: 'center',
+    marginRight: spacing.md,
+  },
+  roleItemIconActive: {
+    backgroundColor: colors.nautical.teal,
+  },
+  roleItemName: {
+    fontSize: typography.fontSize.base,
+    fontWeight: '500',
+    color: colors.flow.text,
+  },
+  roleItemNameActive: {
+    fontWeight: '700',
+    color: colors.nautical.teal,
+  },
+  infoButton: {
+    padding: spacing.md,
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  roleDescription: {
+    paddingHorizontal: spacing.md + 36 + spacing.md, // icon width + margins
+    paddingBottom: spacing.sm,
+    paddingTop: 0,
+  },
+  roleDescriptionText: {
+    fontSize: typography.fontSize.sm,
+    color: colors.flow.textSecondary,
+    fontStyle: 'italic',
+    lineHeight: 18,
+  },
+
   // Message bubble styles
   messageBubble: {
     flexDirection: 'row',

src/screens/MeScreen.tsx

@@ -14,9 +14,11 @@ import {
 import { LinearGradient } from 'expo-linear-gradient';
 import { Ionicons, Feather, MaterialCommunityIcons, FontAwesome5 } from '@expo/vector-icons';
 import { colors, typography, spacing, borderRadius, shadows } from '../theme/colors';
+import AsyncStorage from '@react-native-async-storage/async-storage';
 import { useAuth } from '../context/AuthContext';
 import { Heir, HeirStatus, PaymentStrategy } from '../types';
 import HeritageScreen from './HeritageScreen';
+import { VAULT_STORAGE_KEYS } from './SentinelScreen';
 
 // Mock heirs data
 const initialHeirs: Heir[] = [
@@ -220,6 +222,7 @@ export default function MeScreen() {
   const [showHeritageModal, setShowHeritageModal] = useState(false);
   const [showThemeModal, setShowThemeModal] = useState(false);
   const [isDarkMode, setIsDarkMode] = useState(false);
+  const [showSignOutModal, setShowSignOutModal] = useState(false);
 
   // Heritage / Fleet Legacy states
   const [heirs, setHeirs] = useState<Heir[]>(initialHeirs);
@@ -294,18 +297,26 @@ export default function MeScreen() {
   };
 
   const handleAbandonIsland = () => {
-    Alert.alert(
+    console.log('[MeScreen] Sign out button clicked');
-      'Sign Out',
+    setShowSignOutModal(true);
-      'Are you sure you want to sign out?',
+  };
-      [
+
-        { text: 'Cancel', style: 'cancel' },
+  const handleConfirmSignOut = () => {
-        {
+    console.log('[MeScreen] User confirmed sign out');
-          text: 'Sign Out',
+    setShowSignOutModal(false);
-          style: 'destructive',
+    signOut();
-          onPress: signOut
+  };
-        },
+
-      ]
+  const handleResetVault = async () => {
-    );
+    try {
+      await AsyncStorage.multiRemove([
+        VAULT_STORAGE_KEYS.INITIALIZED,
+        VAULT_STORAGE_KEYS.SHARE_DEVICE,
+      ]);
+      Alert.alert('Done', 'Vault state reset. Go to Sentinel → Open Shadow Vault to see first-time flow.');
+    } catch (e) {
+      Alert.alert('Error', 'Failed to reset vault state.');
+    }
   };
 
   return (
@@ -885,6 +896,21 @@ export default function MeScreen() {
                   <Text style={styles.sanctumValue}>View</Text>
                 </View>
               </View>
+
+              {__DEV__ && (
+                <View style={styles.sanctumSection}>
+                  <Text style={styles.tideLabel}>DEV ONLY</Text>
+                  <TouchableOpacity
+                    style={styles.devResetButton}
+                    onPress={handleResetVault}
+                    activeOpacity={0.85}
+                  >
+                    <Ionicons name="refresh" size={16} color={colors.nautical.coral} />
+                    <Text style={styles.devResetText}>Reset Vault State</Text>
+                  </TouchableOpacity>
+                  <Text style={styles.sanctumHint}>Clear hasVaultInitialized & Share A. Test first-open flow.</Text>
+                </View>
+              )}
             </ScrollView>
             <View style={styles.tideModalButtons}>
               <TouchableOpacity
@@ -1412,6 +1438,46 @@ export default function MeScreen() {
           </View>
         </View>
       </Modal>
+
+      {/* Sign Out Confirmation Modal */}
+      <Modal
+        visible={showSignOutModal}
+        animationType="fade"
+        transparent
+        onRequestClose={() => setShowSignOutModal(false)}
+      >
+        <View style={styles.spiritOverlay}>
+          <View style={styles.signOutModal}>
+            <View style={styles.signOutHeader}>
+              <View style={styles.signOutIcon}>
+                <Feather name="log-out" size={32} color={colors.nautical.coral} />
+              </View>
+              <Text style={styles.signOutTitle}>Sign Out</Text>
+              <Text style={styles.signOutMessage}>
+                Are you sure you want to sign out? You'll need to log in again to access your account.
+              </Text>
+            </View>
+
+            <View style={styles.signOutButtons}>
+              <TouchableOpacity
+                style={styles.signOutCancelButton}
+                onPress={() => setShowSignOutModal(false)}
+                activeOpacity={0.85}
+              >
+                <Text style={styles.signOutCancelText}>Cancel</Text>
+              </TouchableOpacity>
+
+              <TouchableOpacity
+                style={styles.signOutConfirmButton}
+                onPress={handleConfirmSignOut}
+                activeOpacity={0.85}
+              >
+                <Text style={styles.signOutConfirmText}>Sign Out</Text>
+              </TouchableOpacity>
+            </View>
+          </View>
+        </View>
+      </Modal>
     </View>
   );
 }
@@ -1814,6 +1880,23 @@ const styles = StyleSheet.create({
     fontSize: typography.fontSize.sm,
     color: colors.me.textSecondary,
   },
+  devResetButton: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: spacing.sm,
+    paddingVertical: spacing.sm,
+    paddingHorizontal: spacing.md,
+    backgroundColor: `${colors.nautical.coral}15`,
+    borderRadius: borderRadius.lg,
+    borderWidth: 1,
+    borderColor: `${colors.nautical.coral}40`,
+    alignSelf: 'flex-start',
+  },
+  devResetText: {
+    fontSize: typography.fontSize.sm,
+    color: colors.nautical.coral,
+    fontWeight: '600',
+  },
   sanctumAlert: {
     flexDirection: 'row',
     alignItems: 'center',
@@ -2333,4 +2416,71 @@ const styles = StyleSheet.create({
     justifyContent: 'center',
     zIndex: 10,
   },
+  // Sign Out Modal Styles
+  signOutModal: {
+    backgroundColor: colors.me.cardBackground,
+    borderRadius: borderRadius.xl,
+    padding: spacing.xl,
+    marginHorizontal: spacing.xl,
+    maxWidth: 400,
+    width: '100%',
+    ...shadows.medium,
+  },
+  signOutHeader: {
+    alignItems: 'center',
+    marginBottom: spacing.xl,
+  },
+  signOutIcon: {
+    width: 72,
+    height: 72,
+    borderRadius: 36,
+    backgroundColor: `${colors.nautical.coral}15`,
+    alignItems: 'center',
+    justifyContent: 'center',
+    marginBottom: spacing.base,
+  },
+  signOutTitle: {
+    fontSize: typography.fontSize.xl,
+    fontWeight: '700',
+    color: colors.me.text,
+    marginBottom: spacing.sm,
+  },
+  signOutMessage: {
+    fontSize: typography.fontSize.base,
+    color: colors.me.textSecondary,
+    textAlign: 'center',
+    lineHeight: typography.fontSize.base * 1.5,
+  },
+  signOutButtons: {
+    flexDirection: 'row',
+    gap: spacing.md,
+  },
+  signOutCancelButton: {
+    flex: 1,
+    paddingVertical: spacing.base,
+    paddingHorizontal: spacing.lg,
+    borderRadius: borderRadius.lg,
+    backgroundColor: colors.me.cardBorder,
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  signOutCancelText: {
+    fontSize: typography.fontSize.base,
+    fontWeight: '600',
+    color: colors.me.text,
+  },
+  signOutConfirmButton: {
+    flex: 1,
+    paddingVertical: spacing.base,
+    paddingHorizontal: spacing.lg,
+    borderRadius: borderRadius.lg,
+    backgroundColor: colors.nautical.coral,
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  signOutConfirmText: {
+    fontSize: typography.fontSize.base,
+    fontWeight: '600',
+    color: '#fff',
+  },
 });

src/screens/SentinelScreen.tsx

@@ -1,4 +1,4 @@
-import React, { useState, useEffect, useRef } from 'react';
+import React, { useState, useEffect } from 'react';
 import {
   View,
   Text,
@@ -8,40 +8,12 @@ import {
   SafeAreaView,
   Animated,
   Modal,
-  TextInput,
-  KeyboardAvoidingView,
-  Platform,
-  Share,
-  Alert,
-  Linking,
 } from 'react-native';
 import { LinearGradient } from 'expo-linear-gradient';
 import { Ionicons, Feather, MaterialCommunityIcons, FontAwesome5 } from '@expo/vector-icons';
-import { captureRef } from 'react-native-view-shot';
-import AsyncStorage from '@react-native-async-storage/async-storage';
 import { colors, typography, spacing, borderRadius, shadows } from '../theme/colors';
 import { SystemStatus, KillSwitchLog } from '../types';
 import VaultScreen from './VaultScreen';
-import {
-  SSSShare,
-  mnemonicToEntropy,
-  splitSecret,
-  formatShareCompact,
-  serializeShare,
-  verifyShares,
-} from '../utils/sss';
-
-// Nautical-themed mnemonic word list (unique words only)
-const MNEMONIC_WORDS = [
-  'anchor', 'harbor', 'compass', 'lighthouse', 'current', 'ocean', 'tide', 'voyage',
-  'keel', 'stern', 'bow', 'mast', 'sail', 'port', 'starboard', 'reef',
-  'signal', 'beacon', 'chart', 'helm', 'gale', 'calm', 'cove', 'isle',
-  'horizon', 'sextant', 'sound', 'drift', 'wake', 'mariner', 'pilot', 'fathom',
-  'buoy', 'lantern', 'harpoon', 'lagoon', 'bay', 'strait', 'riptide', 'foam',
-  'coral', 'pearl', 'trident', 'ebb', 'flow', 'vault', 'cipher', 'shroud',
-  'salt', 'wave', 'grotto', 'storm', 'north', 'south', 'east', 'west',
-  'ember', 'cabin', 'ledger', 'torch', 'sanctum', 'oath', 'depths', 'captain',
-] as const;
 
 // Animation timing constants
 const ANIMATION_DURATION = {
@@ -51,49 +23,6 @@ const ANIMATION_DURATION = {
   heartbeatPress: 150,
 } as const;
 
-const generateMnemonic = (wordCount = 12) => {
-  const words: string[] = [];
-  for (let i = 0; i < wordCount; i += 1) {
-    const index = Math.floor(Math.random() * MNEMONIC_WORDS.length);
-    words.push(MNEMONIC_WORDS[index]);
-  }
-  return words;
-};
-
-/**
- * Generate SSS shares from mnemonic words
- * Uses Shamir's Secret Sharing (3,2) threshold scheme
- */
-const generateSSSShares = (words: string[]): SSSShare[] => {
-  try {
-    // Convert mnemonic to entropy (big integer)
-    const entropy = mnemonicToEntropy(words, MNEMONIC_WORDS);
-    
-    // Split entropy into 3 shares using SSS
-    const shares = splitSecret(entropy);
-    
-    // Verify shares can recover the original (optional, for debugging)
-    if (__DEV__) {
-      const isValid = verifyShares(shares, entropy);
-      if (!isValid) {
-        console.warn('SSS verification failed!');
-      } else {
-        console.log('SSS shares verified successfully');
-      }
-    }
-    
-    return shares;
-  } catch (error) {
-    console.error('Failed to generate SSS shares:', error);
-    // Fallback: return empty shares (should not happen in production)
-    return [
-      { x: 1, y: BigInt(0), label: 'device' },
-      { x: 2, y: BigInt(0), label: 'cloud' },
-      { x: 3, y: BigInt(0), label: 'heir' },
-    ];
-  }
-};
-
 // Icon names type for type safety
 type StatusIconName = 'checkmark-circle' | 'warning' | 'alert-circle';
 
@@ -130,26 +59,10 @@ const statusConfig: Record<SystemStatus, {
 
 // Mock data
 const initialLogs: KillSwitchLog[] = [
-  {
+  { id: '1', action: 'HEARTBEAT_CONFIRMED', timestamp: new Date('2024-01-18T09:30:00') },
-    id: '1',
+  { id: '2', action: 'SUBSCRIPTION_VERIFIED', timestamp: new Date('2024-01-17T00:00:00') },
-    action: 'HEARTBEAT_CONFIRMED',
+  { id: '3', action: 'JOURNAL_ACTIVITY', timestamp: new Date('2024-01-16T15:42:00') },
-    timestamp: new Date('2024-01-18T09:30:00'),
+  { id: '4', action: 'HEARTBEAT_CONFIRMED', timestamp: new Date('2024-01-15T11:20:00') },
-  },
-  {
-    id: '2',
-    action: 'SUBSCRIPTION_VERIFIED',
-    timestamp: new Date('2024-01-17T00:00:00'),
-  },
-  {
-    id: '3',
-    action: 'JOURNAL_ACTIVITY',
-    timestamp: new Date('2024-01-16T15:42:00'),
-  },
-  {
-    id: '4',
-    action: 'HEARTBEAT_CONFIRMED',
-    timestamp: new Date('2024-01-15T11:20:00'),
-  },
 ];
 
 export default function SentinelScreen() {
@@ -161,16 +74,8 @@ export default function SentinelScreen() {
   const [glowAnim] = useState(new Animated.Value(0.5));
   const [rotateAnim] = useState(new Animated.Value(0));
   const [showVault, setShowVault] = useState(false);
-  const [showMnemonic, setShowMnemonic] = useState(false);
-  const [mnemonicWords, setMnemonicWords] = useState<string[]>([]);
-  const [sssShares, setSssShares] = useState<SSSShare[]>([]);
-  const [showEmailForm, setShowEmailForm] = useState(false);
-  const [emailAddress, setEmailAddress] = useState('');
-  const [isCapturing, setIsCapturing] = useState(false);
-  const mnemonicRef = useRef<View>(null);
 
   useEffect(() => {
-    // Pulse animation
     const pulseAnimation = Animated.loop(
       Animated.sequence([
         Animated.timing(pulseAnim, {
@@ -187,7 +92,6 @@ export default function SentinelScreen() {
     );
     pulseAnimation.start();
 
-    // Glow animation
     const glowAnimation = Animated.loop(
       Animated.sequence([
         Animated.timing(glowAnim, {
@@ -204,7 +108,6 @@ export default function SentinelScreen() {
     );
     glowAnimation.start();
 
-    // Slow rotate for ship wheel
     const rotateAnimation = Animated.loop(
       Animated.timing(rotateAnim, {
         toValue: 1,
@@ -214,7 +117,6 @@ export default function SentinelScreen() {
     );
     rotateAnimation.start();
 
-    // Cleanup animations on unmount to prevent memory leaks
     return () => {
       pulseAnimation.stop();
       glowAnimation.stop();
@@ -222,73 +124,9 @@ export default function SentinelScreen() {
     };
   }, [pulseAnim, glowAnim, rotateAnim]);
 
-  const openVaultWithMnemonic = () => {
+  const openVault = () => setShowVault(true);
-    const words = generateMnemonic();
-    const shares = generateSSSShares(words);
-    setMnemonicWords(words);
-    setSssShares(shares);
-    setShowMnemonic(true);
-    setShowVault(false);
-    setShowEmailForm(false);
-    setEmailAddress('');
-    
-    // Store Share A (device share) locally
-    if (shares[0]) {
-      AsyncStorage.setItem('sentinel_share_device', serializeShare(shares[0])).catch(() => {
-        // Best-effort local store; UI remains available
-      });
-    }
-  };
-
-  const handleScreenshot = async () => {
-    try {
-      setIsCapturing(true);
-      const uri = await captureRef(mnemonicRef, {
-        format: 'png',
-        quality: 1,
-        result: 'tmpfile',
-      });
-      await Share.share({
-        url: uri,
-        message: 'Sentinel key backup',
-      });
-      setShowMnemonic(false);
-      setShowVault(true);
-    } catch (error) {
-      Alert.alert('Screenshot failed', 'Please try again or use email backup.');
-    } finally {
-      setIsCapturing(false);
-    }
-  };
-
-  const handleEmailBackup = () => {
-    setShowEmailForm(true);
-  };
-
-  const handleSendEmail = async () => {
-    const trimmed = emailAddress.trim();
-    if (!trimmed || !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(trimmed)) {
-      Alert.alert('Invalid email', 'Please enter a valid email address.');
-      return;
-    }
-
-    const subject = encodeURIComponent('Sentinel Vault Recovery Key');
-    const body = encodeURIComponent(`Your 12-word mnemonic:\n${mnemonicWords.join(' ')}`);
-    const mailtoUrl = `mailto:${trimmed}?subject=${subject}&body=${body}`;
-
-    try {
-      await Linking.openURL(mailtoUrl);
-      setShowMnemonic(false);
-      setShowEmailForm(false);
-      setEmailAddress('');
-      setShowVault(true);
-    } catch (error) {
-      Alert.alert('Email failed', 'Unable to open email client.');
-    }
-  };
 
   const handleHeartbeat = () => {
-    // Animate pulse
     Animated.sequence([
       Animated.timing(pulseAnim, {
         toValue: 1.15,
@@ -302,7 +140,6 @@ export default function SentinelScreen() {
       }),
     ]).start();
 
-    // Add new log using functional update to avoid stale closure
     const newLog: KillSwitchLog = {
       id: Date.now().toString(),
       action: 'HEARTBEAT_CONFIRMED',
@@ -310,35 +147,27 @@ export default function SentinelScreen() {
     };
     setLogs((prevLogs) => [newLog, ...prevLogs]);
 
-    // Reset status if warning
     if (status === 'warning') {
       setStatus('normal');
     }
   };
 
-  const formatDateTime = (date: Date) => {
+  const formatDateTime = (date: Date) =>
-    return date.toLocaleString('en-US', {
+    date.toLocaleString('en-US', {
       year: 'numeric',
       month: '2-digit',
       day: '2-digit',
       hour: '2-digit',
       minute: '2-digit',
     });
-  };
 
   const formatTimeAgo = (date: Date) => {
     const now = new Date();
     const diff = now.getTime() - date.getTime();
     const hours = Math.floor(diff / (1000 * 60 * 60));
     const minutes = Math.floor((diff % (1000 * 60 * 60)) / (1000 * 60));
-    
+    if (hours > 24) return `${Math.floor(hours / 24)} days ago`;
-    if (hours > 24) {
+    if (hours > 0) return `${hours}h ${minutes}m ago`;
-      const days = Math.floor(hours / 24);
-      return `${days} days ago`;
-    }
-    if (hours > 0) {
-      return `${hours}h ${minutes}m ago`;
-    }
     return `${minutes}m ago`;
   };
 
@@ -378,7 +207,7 @@ export default function SentinelScreen() {
                     transform: [{ scale: pulseAnim }],
                     opacity: glowAnim,
                     backgroundColor: `${currentStatus.color}20`,
-                  }
+                  },
                 ]}
               />
               <Animated.View style={{ transform: [{ scale: pulseAnim }] }}>
@@ -416,24 +245,16 @@ export default function SentinelScreen() {
                   <FontAwesome5 name="anchor" size={16} color={colors.sentinel.primary} />
                 </View>
                 <Text style={styles.metricLabel}>SUBSCRIPTION</Text>
-                <Text style={styles.metricValue}>
+                <Text style={styles.metricValue}>{formatTimeAgo(lastSubscriptionCheck)}</Text>
-                  {formatTimeAgo(lastSubscriptionCheck)}
+                <Text style={styles.metricTime}>{formatDateTime(lastSubscriptionCheck)}</Text>
-                </Text>
-                <Text style={styles.metricTime}>
-                  {formatDateTime(lastSubscriptionCheck)}
-                </Text>
               </View>
               <View style={styles.metricCard}>
                 <View style={styles.metricIconContainer}>
                   <Feather name="edit-3" size={16} color={colors.sentinel.primary} />
                 </View>
                 <Text style={styles.metricLabel}>LAST JOURNAL</Text>
-                <Text style={styles.metricValue}>
+                <Text style={styles.metricValue}>{formatTimeAgo(lastFlowActivity)}</Text>
-                  {formatTimeAgo(lastFlowActivity)}
+                <Text style={styles.metricTime}>{formatDateTime(lastFlowActivity)}</Text>
-                </Text>
-                <Text style={styles.metricTime}>
-                  {formatDateTime(lastFlowActivity)}
-                </Text>
               </View>
             </View>
 
@@ -450,7 +271,7 @@ export default function SentinelScreen() {
               </View>
               <TouchableOpacity
                 style={styles.vaultAccessButton}
-                onPress={openVaultWithMnemonic}
+                onPress={openVault}
                 activeOpacity={0.8}
                 accessibilityLabel="Open Shadow Vault"
                 accessibilityRole="button"
@@ -494,9 +315,7 @@ export default function SentinelScreen() {
                   <View style={styles.logDot} />
                   <View style={styles.logContent}>
                     <Text style={styles.logAction}>{log.action}</Text>
-                    <Text style={styles.logTime}>
+                    <Text style={styles.logTime}>{formatDateTime(log.timestamp)}</Text>
-                      {formatDateTime(log.timestamp)}
-                    </Text>
                   </View>
                 </View>
               ))}
@@ -512,7 +331,7 @@ export default function SentinelScreen() {
         onRequestClose={() => setShowVault(false)}
       >
         <View style={styles.vaultModalContainer}>
-          <VaultScreen />
+          {showVault ? <VaultScreen /> : null}
           <TouchableOpacity
             style={styles.vaultCloseButton}
             onPress={() => setShowVault(false)}
@@ -524,140 +343,20 @@ export default function SentinelScreen() {
           </TouchableOpacity>
         </View>
       </Modal>
-
-      {/* Mnemonic Modal */}
-      <Modal
-        visible={showMnemonic}
-        animationType="fade"
-        transparent
-        onRequestClose={() => setShowMnemonic(false)}
-      >
-        <KeyboardAvoidingView
-          style={styles.mnemonicOverlay}
-          behavior={Platform.OS === 'ios' ? 'padding' : undefined}
-        >
-          <View ref={mnemonicRef} collapsable={false}>
-            <LinearGradient
-              colors={[colors.sentinel.cardBackground, colors.sentinel.backgroundGradientEnd]}
-              style={styles.mnemonicCard}
-            >
-            <TouchableOpacity
-              style={styles.mnemonicClose}
-              onPress={() => setShowMnemonic(false)}
-              activeOpacity={0.85}
-              accessibilityLabel="Close mnemonic modal"
-              accessibilityRole="button"
-            >
-              <Ionicons name="close" size={18} color={colors.sentinel.textSecondary} />
-            </TouchableOpacity>
-            <View style={styles.mnemonicHeader}>
-              <MaterialCommunityIcons name="key-variant" size={22} color={colors.sentinel.primary} />
-              <Text style={styles.mnemonicTitle}>12-Word Mnemonic</Text>
-            </View>
-            <Text style={styles.mnemonicSubtitle}>
-              Your seed is protected by SSS (3,2) threshold encryption. Any 2 shares can restore your vault.
-            </Text>
-            <View style={styles.mnemonicBlock}>
-              <Text style={styles.mnemonicBlockText}>
-                {mnemonicWords.join(' ')}
-              </Text>
-            </View>
-            <View style={styles.partGrid}>
-              <View style={[styles.partCard, styles.partCardStored]}>
-                <Text style={styles.partLabel}>SHARE A • DEVICE</Text>
-                <Text style={styles.partValue}>
-                  {sssShares[0] ? formatShareCompact(sssShares[0]) : '---'}
-                </Text>
-                <Text style={styles.partHint}>Stored on this device</Text>
-              </View>
-              <View style={styles.partCard}>
-                <Text style={styles.partLabel}>SHARE B • CLOUD</Text>
-                <Text style={styles.partValue}>
-                  {sssShares[1] ? formatShareCompact(sssShares[1]) : '---'}
-                </Text>
-                <Text style={styles.partHint}>To be synced to Sentinel</Text>
-              </View>
-              <View style={styles.partCard}>
-                <Text style={styles.partLabel}>SHARE C • HEIR</Text>
-                <Text style={styles.partValue}>
-                  {sssShares[2] ? formatShareCompact(sssShares[2]) : '---'}
-                </Text>
-                <Text style={styles.partHint}>For your heir (2-of-3 required)</Text>
-              </View>
-            </View>
-            <TouchableOpacity
-              style={[styles.mnemonicPrimaryButton, isCapturing && styles.mnemonicButtonDisabled]}
-              onPress={handleScreenshot}
-              activeOpacity={0.85}
-              disabled={isCapturing}
-              accessibilityLabel="Take screenshot backup of mnemonic"
-              accessibilityRole="button"
-              accessibilityState={{ disabled: isCapturing }}
-            >
-              <Text style={styles.mnemonicPrimaryText}>
-                {isCapturing ? 'CAPTURING...' : 'PHYSICAL BACKUP (SCREENSHOT)'}
-              </Text>
-            </TouchableOpacity>
-            <TouchableOpacity
-              style={styles.mnemonicSecondaryButton}
-              onPress={handleEmailBackup}
-              activeOpacity={0.85}
-              accessibilityLabel="Send mnemonic backup via email"
-              accessibilityRole="button"
-            >
-              <Text style={styles.mnemonicSecondaryText}>EMAIL BACKUP</Text>
-            </TouchableOpacity>
-            {showEmailForm ? (
-              <View style={styles.emailForm}>
-                <TextInput
-                  style={styles.emailInput}
-                  value={emailAddress}
-                  onChangeText={setEmailAddress}
-                  placeholder="you@email.com"
-                  placeholderTextColor={colors.sentinel.textSecondary}
-                  keyboardType="email-address"
-                  autoCapitalize="none"
-                  autoCorrect={false}
-                />
-                <TouchableOpacity
-                  style={styles.emailSendButton}
-                  onPress={handleSendEmail}
-                  activeOpacity={0.85}
-                  accessibilityLabel="Send backup email"
-                  accessibilityRole="button"
-                >
-                  <Text style={styles.emailSendText}>SEND EMAIL</Text>
-                </TouchableOpacity>
-              </View>
-            ) : null}
-            </LinearGradient>
-          </View>
-        </KeyboardAvoidingView>
-      </Modal>
     </View>
   );
 }
 
 const styles = StyleSheet.create({
-  container: {
+  container: { flex: 1 },
-    flex: 1,
+  gradient: { flex: 1 },
-  },
+  safeArea: { flex: 1 },
-  gradient: {
+  scrollView: { flex: 1 },
-    flex: 1,
-  },
-  safeArea: {
-    flex: 1,
-  },
-  scrollView: {
-    flex: 1,
-  },
   scrollContent: {
     padding: spacing.lg,
     paddingBottom: 120,
   },
-  header: {
+  header: { marginBottom: spacing.xl },
-    marginBottom: spacing.xl,
-  },
   headerTitleRow: {
     flexDirection: 'row',
     alignItems: 'center',
@@ -763,9 +462,7 @@ const styles = StyleSheet.create({
     marginBottom: spacing.xl,
     ...shadows.medium,
   },
-  heartbeatGradient: {
+  heartbeatGradient: { padding: spacing.lg },
-    padding: spacing.lg,
-  },
   heartbeatContent: {
     flexDirection: 'row',
     alignItems: 'center',
@@ -819,9 +516,7 @@ const styles = StyleSheet.create({
     marginTop: 6,
     marginRight: spacing.md,
   },
-  logContent: {
+  logContent: { flex: 1 },
-    flex: 1,
-  },
   logAction: {
     fontSize: typography.fontSize.sm,
     color: colors.sentinel.text,
@@ -834,7 +529,6 @@ const styles = StyleSheet.create({
     color: colors.sentinel.textSecondary,
     fontFamily: typography.fontFamily.mono,
   },
-  // Shadow Vault Access Card
   vaultAccessCard: {
     flexDirection: 'row',
     alignItems: 'center',
@@ -854,9 +548,7 @@ const styles = StyleSheet.create({
     justifyContent: 'center',
     marginRight: spacing.md,
   },
-  vaultAccessContent: {
+  vaultAccessContent: { flex: 1 },
-    flex: 1,
-  },
   vaultAccessTitle: {
     fontSize: typography.fontSize.base,
     fontWeight: '600',
@@ -878,7 +570,6 @@ const styles = StyleSheet.create({
     fontWeight: '700',
     fontSize: typography.fontSize.sm,
   },
-  // Vault Modal
   vaultModalContainer: {
     flex: 1,
     backgroundColor: colors.vault.background,
@@ -894,148 +585,4 @@ const styles = StyleSheet.create({
     alignItems: 'center',
     justifyContent: 'center',
   },
-  mnemonicOverlay: {
-    flex: 1,
-    backgroundColor: 'rgba(11, 20, 24, 0.72)',
-    justifyContent: 'center',
-    padding: spacing.lg,
-  },
-  mnemonicCard: {
-    borderRadius: borderRadius.xl,
-    padding: spacing.lg,
-    borderWidth: 1,
-    borderColor: colors.sentinel.cardBorder,
-    ...shadows.glow,
-  },
-  mnemonicHeader: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    gap: spacing.sm,
-    marginBottom: spacing.sm,
-  },
-  mnemonicClose: {
-    position: 'absolute',
-    top: spacing.sm,
-    right: spacing.sm,
-    width: 32,
-    height: 32,
-    borderRadius: 16,
-    alignItems: 'center',
-    justifyContent: 'center',
-    backgroundColor: 'rgba(26, 58, 74, 0.35)',
-  },
-  mnemonicTitle: {
-    fontSize: typography.fontSize.lg,
-    fontWeight: '700',
-    color: colors.sentinel.text,
-    letterSpacing: typography.letterSpacing.wide,
-  },
-  mnemonicSubtitle: {
-    fontSize: typography.fontSize.sm,
-    color: colors.sentinel.textSecondary,
-    marginBottom: spacing.md,
-  },
-  mnemonicBlock: {
-    backgroundColor: colors.sentinel.cardBackground,
-    borderRadius: borderRadius.lg,
-    paddingVertical: spacing.md,
-    paddingHorizontal: spacing.md,
-    borderWidth: 1,
-    borderColor: colors.sentinel.cardBorder,
-    marginBottom: spacing.lg,
-  },
-  partGrid: {
-    gap: spacing.sm,
-    marginBottom: spacing.lg,
-  },
-  partCard: {
-    backgroundColor: colors.sentinel.cardBackground,
-    borderRadius: borderRadius.lg,
-    paddingVertical: spacing.sm,
-    paddingHorizontal: spacing.md,
-    borderWidth: 1,
-    borderColor: colors.sentinel.cardBorder,
-  },
-  partCardStored: {
-    borderColor: colors.sentinel.primary,
-  },
-  partLabel: {
-    fontSize: typography.fontSize.xs,
-    color: colors.sentinel.textSecondary,
-    letterSpacing: typography.letterSpacing.wide,
-    marginBottom: 4,
-    fontWeight: '600',
-  },
-  partValue: {
-    fontSize: typography.fontSize.md,
-    color: colors.sentinel.text,
-    fontFamily: typography.fontFamily.mono,
-    fontWeight: '700',
-    marginBottom: 2,
-  },
-  partHint: {
-    fontSize: typography.fontSize.xs,
-    color: colors.sentinel.textSecondary,
-  },
-  mnemonicBlockText: {
-    fontSize: typography.fontSize.sm,
-    color: colors.sentinel.text,
-    fontFamily: typography.fontFamily.mono,
-    fontWeight: '600',
-    lineHeight: 22,
-    textAlign: 'center',
-  },
-  mnemonicPrimaryButton: {
-    backgroundColor: colors.sentinel.primary,
-    paddingVertical: spacing.sm,
-    borderRadius: borderRadius.full,
-    alignItems: 'center',
-    marginBottom: spacing.sm,
-  },
-  mnemonicButtonDisabled: {
-    opacity: 0.6,
-  },
-  mnemonicPrimaryText: {
-    color: colors.nautical.cream,
-    fontWeight: '700',
-    letterSpacing: typography.letterSpacing.wide,
-  },
-  mnemonicSecondaryButton: {
-    backgroundColor: 'transparent',
-    paddingVertical: spacing.sm,
-    borderRadius: borderRadius.full,
-    alignItems: 'center',
-    borderWidth: 1,
-    borderColor: colors.sentinel.cardBorder,
-  },
-  mnemonicSecondaryText: {
-    color: colors.sentinel.text,
-    fontWeight: '700',
-    letterSpacing: typography.letterSpacing.wide,
-  },
-  emailForm: {
-    marginTop: spacing.sm,
-  },
-  emailInput: {
-    height: 44,
-    borderRadius: borderRadius.full,
-    borderWidth: 1,
-    borderColor: colors.sentinel.cardBorder,
-    paddingHorizontal: spacing.md,
-    color: colors.sentinel.text,
-    fontSize: typography.fontSize.sm,
-    backgroundColor: 'rgba(255, 255, 255, 0.02)',
-    marginBottom: spacing.sm,
-  },
-  emailSendButton: {
-    backgroundColor: colors.nautical.teal,
-    paddingVertical: spacing.sm,
-    borderRadius: borderRadius.full,
-    alignItems: 'center',
-  },
-  emailSendText: {
-    color: colors.nautical.cream,
-    fontWeight: '700',
-    letterSpacing: typography.letterSpacing.wide,
-  },
 });

src/services/ai.service.ts

@@ -143,13 +143,14 @@ export const aiService = {
    * Simple helper for single message chat
    * @param content - User message content
    * @param token - JWT token for authentication
+   * @param systemPrompt - Optional custom system prompt
    * @returns AI response text
    */
-  async sendMessage(content: string, token?: string): Promise<string> {
+  async sendMessage(content: string, token?: string, systemPrompt?: string): Promise<string> {
     const messages: AIMessage[] = [
       {
         role: 'system',
-        content: AI_CONFIG.DEFAULT_SYSTEM_PROMPT,
+        content: systemPrompt || AI_CONFIG.DEFAULT_SYSTEM_PROMPT,
       },
       {
         role: 'user',

src/services/storage.service.ts

@@ -0,0 +1,120 @@
+/**
+ * Storage Service
+ * 
+ * Handles local persistence of chat history and active conversations
+ * using AsyncStorage with user-specific isolation.
+ */
+
+import AsyncStorage from '@react-native-async-storage/async-storage';
+
+// =============================================================================
+// Constants
+// =============================================================================
+
+const STORAGE_KEYS = {
+    CHAT_HISTORY: '@sentinel:chat_history',
+    CURRENT_MESSAGES: '@sentinel:current_messages',
+} as const;
+
+// =============================================================================
+// Service Implementation
+// =============================================================================
+
+export const storageService = {
+    /**
+     * Get user-specific storage key
+     */
+    getUserKey(baseKey: string, userId: string | number): string {
+        return `${baseKey}:user_${userId}`;
+    },
+
+    /**
+     * Save the complete list of chat sessions to local storage for a specific user
+     */
+    async saveChatHistory(history: any[], userId: string | number): Promise<void> {
+        try {
+            const jsonValue = JSON.stringify(history);
+            const key = this.getUserKey(STORAGE_KEYS.CHAT_HISTORY, userId);
+            await AsyncStorage.setItem(key, jsonValue);
+            console.log(`[Storage] Saved chat history for user ${userId}:`, history.length, 'sessions');
+        } catch (e) {
+            console.error('Error saving chat history:', e);
+        }
+    },
+
+    /**
+     * Load the list of chat sessions from local storage for a specific user
+     */
+    async getChatHistory(userId: string | number): Promise<any[]> {
+        try {
+            const key = this.getUserKey(STORAGE_KEYS.CHAT_HISTORY, userId);
+            const jsonValue = await AsyncStorage.getItem(key);
+            const result = jsonValue != null ? JSON.parse(jsonValue) : [];
+            console.log(`[Storage] Loaded chat history for user ${userId}:`, result.length, 'sessions');
+            return result;
+        } catch (e) {
+            console.error('Error getting chat history:', e);
+            return [];
+        }
+    },
+
+    /**
+   * Save the current active conversation messages for a specific role and user
+   */
+    async saveCurrentChat(roleId: string, messages: any[], userId: string | number): Promise<void> {
+        try {
+            const jsonValue = JSON.stringify(messages);
+            const key = `${this.getUserKey(STORAGE_KEYS.CURRENT_MESSAGES, userId)}:${roleId}`;
+            await AsyncStorage.setItem(key, jsonValue);
+            console.log(`[Storage] Saved current chat for user ${userId}, role ${roleId}:`, messages.length, 'messages');
+        } catch (e) {
+            console.error(`Error saving current chat for role ${roleId}:`, e);
+        }
+    },
+
+    /**
+     * Load the current active conversation messages for a specific role and user
+     */
+    async getCurrentChat(roleId: string, userId: string | number): Promise<any[]> {
+        try {
+            const key = `${this.getUserKey(STORAGE_KEYS.CURRENT_MESSAGES, userId)}:${roleId}`;
+            const jsonValue = await AsyncStorage.getItem(key);
+            const result = jsonValue != null ? JSON.parse(jsonValue) : [];
+            console.log(`[Storage] Loaded current chat for user ${userId}, role ${roleId}:`, result.length, 'messages');
+            return result;
+        } catch (e) {
+            console.error(`Error getting current chat for role ${roleId}:`, e);
+            return [];
+        }
+    },
+
+    /**
+     * Clear all stored chat data for a specific user
+     */
+    async clearUserData(userId: string | number): Promise<void> {
+        try {
+            const keys = await AsyncStorage.getAllKeys();
+            const userPrefix = `:user_${userId}`;
+            const userKeys = keys.filter(key => key.includes(userPrefix));
+            await AsyncStorage.multiRemove(userKeys);
+            console.log(`[Storage] Cleared all data for user ${userId}:`, userKeys.length, 'keys removed');
+        } catch (e) {
+            console.error('Error clearing user data:', e);
+        }
+    },
+
+    /**
+     * Clear all stored chat data (all users)
+     */
+    async clearAllData(): Promise<void> {
+        try {
+            const keys = await AsyncStorage.getAllKeys();
+            const sentinelKeys = keys.filter(key => key.startsWith('@sentinel:'));
+            await AsyncStorage.multiRemove(sentinelKeys);
+            console.log('[Storage] Cleared all data:', sentinelKeys.length, 'keys removed');
+        } catch (e) {
+            console.error('Error clearing storage data:', e);
+        }
+    }
+};
+

src/types/index.ts

@@ -77,6 +77,7 @@ export interface ProtocolInfo {
 export interface User {
   id: number;
   username: string;
+  email?: string;
   public_key: string;
   is_admin: boolean;
   guale: boolean;

src/utils/sss.ts

@@ -5,7 +5,12 @@
  * - Secret is split into 3 shares
  * - Any 2 shares can recover the original secret
  *
- * Based on the Sentinel crypto_core_demo Python implementation.
+ * Correspondence with crypto_core_demo (Python):
+ * - sp_trust_sharding.py: split_to_shares(), recover_from_shares()
+ * - Same algorithm: f(x) = secret + a*x (mod P), Lagrange interpolation
+ * - Difference: entropy conversion. Python uses BIP-39 (mnemonic.to_entropy);
+ *   we use custom word list index-based encoding for compatibility with
+ *   existing MNEMONIC_WORDS. SSS split/recover logic is identical.
  */
 
 // Use a large prime for the finite field