Merge branch 'main' into mobile-demo

feat(flow): image attachment and 422 error message display
- Attach image then send with optional text or image-only (default prompt) - Attached image preview above input with remove - AI image API error detail no longer shows [object Object]
2026-02-04 17:23:25 -08:00 · 2026-02-04 17:19:51 -08:00 · 2026-02-04 16:57:28 -08:00 · 2026-02-04 16:48:00 -08:00 · 2026-02-04 15:24:14 -08:00 · 2026-02-03 21:37:41 -08:00
28 changed files with 3633 additions and 616 deletions
--- a/App.tsx
+++ b/App.tsx
@@ -4,6 +4,7 @@
 * Main application component with authentication routing.
 * Shows loading screen while restoring auth state.
 */
+import './src/polyfills';

 import React from 'react';
 import { Buffer } from 'buffer';
--- a/assets/images/icon.png
+++ b/assets/images/icon.png
--- a/metro.config.js
+++ b/metro.config.js
@@ -0,0 +1,15 @@
+const { getDefaultConfig } = require('expo/metro-config');
+const path = require('path');
+
+const config = getDefaultConfig(__dirname);
+
+config.resolver.extraNodeModules = {
+    ...config.resolver.extraNodeModules,
+    crypto: path.resolve(__dirname, 'src/utils/crypto_polyfill.ts'),
+    stream: require.resolve('readable-stream'),
+    vm: require.resolve('vm-browserify'),
+    async_hooks: path.resolve(__dirname, 'src/utils/async_hooks_mock.ts'),
+    'node:async_hooks': path.resolve(__dirname, 'src/utils/async_hooks_mock.ts'),
+};
+
+module.exports = config;
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,10 @@
      "dependencies": {
        "@expo/metro-runtime": "~4.0.1",
        "@expo/vector-icons": "~14.0.4",
+        "@langchain/core": "^1.1.18",
+        "@langchain/langgraph": "^1.1.3",
+        "@noble/ciphers": "^1.3.0",
+        "@noble/hashes": "^1.8.0",
        "@react-native-async-storage/async-storage": "^2.2.0",
        "@react-navigation/bottom-tabs": "^6.6.1",
        "@react-navigation/native": "^6.1.18",
@@ -19,6 +23,7 @@
        "expo": "~52.0.0",
        "expo-asset": "~11.0.5",
        "expo-constants": "~17.0.8",
+        "expo-crypto": "~14.0.2",
        "expo-font": "~13.0.4",
        "expo-haptics": "~14.0.0",
        "expo-image-picker": "^17.0.10",
@@ -31,8 +36,11 @@
        "react-native-reanimated": "~3.16.1",
        "react-native-safe-area-context": "4.12.0",
        "react-native-screens": "~4.4.0",
+        "react-native-svg": "^15.15.2",
        "react-native-view-shot": "^3.8.0",
-        "react-native-web": "~0.19.13"
+        "react-native-web": "~0.19.13",
+        "readable-stream": "^4.7.0",
+        "vm-browserify": "^1.1.2"
      },
      "devDependencies": {
        "@babel/core": "^7.25.2",
@@ -2198,6 +2206,12 @@
        "node": ">=6.9.0"
      }
    },
+    "node_modules/@cfworker/json-schema": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmmirror.com/@cfworker/json-schema/-/json-schema-4.1.1.tgz",
+      "integrity": "sha512-gAmrUZSGtKc3AiBL71iNWxDsyUC5uMaKKGdvzYsBoTW/xi42JQHl7eKV2OYzCUqvc+D2RCcf7EXY2iCyFIk6og==",
+      "license": "MIT"
+    },
    "node_modules/@egjs/hammerjs": {
      "version": "2.0.17",
      "resolved": "https://registry.npmjs.org/@egjs/hammerjs/-/hammerjs-2.0.17.tgz",
@@ -3211,9 +3225,219 @@
        "@jridgewell/sourcemap-codec": "^1.4.14"
      }
    },
+    "node_modules/@langchain/core": {
+      "version": "1.1.18",
+      "resolved": "https://registry.npmmirror.com/@langchain/core/-/core-1.1.18.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "@cfworker/json-schema": "^4.0.2",
+        "ansi-styles": "^5.0.0",
+        "camelcase": "6",
+        "decamelize": "1.2.0",
+        "js-tiktoken": "^1.0.12",
+        "langsmith": ">=0.4.0 <1.0.0",
+        "mustache": "^4.2.0",
+        "p-queue": "^6.6.2",
+        "uuid": "^10.0.0",
+        "zod": "^3.25.76 || ^4"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/@langchain/core/node_modules/ansi-styles": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmmirror.com/ansi-styles/-/ansi-styles-5.2.0.tgz",
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+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "node_modules/@langchain/core/node_modules/camelcase": {
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+      "resolved": "https://registry.npmmirror.com/camelcase/-/camelcase-6.3.0.tgz",
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+      "funding": [
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+        "https://github.com/sponsors/ctavan"
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+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
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+    "node_modules/@langchain/langgraph-sdk": {
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+      "resolved": "https://registry.npmmirror.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.5.5.tgz",
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+        "react": "^18 || ^19",
+        "react-dom": "^18 || ^19"
+      },
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+      "funding": [
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+        "https://github.com/sponsors/ctavan"
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+      "license": "MIT",
+      "bin": {
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+      }
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+    "node_modules/@langchain/langgraph/node_modules/uuid": {
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+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
+    },
+    "node_modules/@noble/ciphers": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmmirror.com/@noble/ciphers/-/ciphers-1.3.0.tgz",
+      "integrity": "sha512-2I0gnIVPtfnMw9ee9h1dJG7tp81+8Ob3OJb3Mv37rx5L40/b0i7djjCVvGOVqc9AEIQyvyu1i6ypKdFw8R8gQw==",
+      "license": "MIT",
+      "engines": {
+        "node": "^14.21.3 || >=16"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
    "node_modules/@noble/hashes": {
      "version": "1.8.0",
-      "resolved": "https://registry.npmjs.org/@noble/hashes/-/hashes-1.8.0.tgz",
+      "resolved": "https://registry.npmmirror.com/@noble/hashes/-/hashes-1.8.0.tgz",
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@@ -3801,6 +4025,12 @@
        "@sinonjs/commons": "^3.0.0"
      }
    },
+    "node_modules/@standard-schema/spec": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmmirror.com/@standard-schema/spec/-/spec-1.1.0.tgz",
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+    },
    "node_modules/@types/babel__core": {
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      "license": "MIT"
    },
+    "node_modules/@types/uuid": {
+      "version": "10.0.0",
+      "resolved": "https://registry.npmmirror.com/@types/uuid/-/uuid-10.0.0.tgz",
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    "node_modules/@types/yargs": {
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@@ -4470,6 +4706,12 @@
        "@noble/hashes": "^1.2.0"
      }
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+    "node_modules/boolbase": {
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+    "node_modules/console-table-printer": {
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@@ -5197,6 +5448,56 @@
        "utrie": "^1.0.2"
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@@ -5221,6 +5522,15 @@
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@@ -5356,6 +5666,61 @@
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+          "url": "https://github.com/sponsors/fb55"
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+      "license": "BSD-2-Clause",
+      "dependencies": {
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+      },
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+      "funding": {
+        "url": "https://github.com/fb55/domhandler?sponsor=1"
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+      "resolved": "https://registry.npmjs.org/domutils/-/domutils-3.2.2.tgz",
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+      "license": "BSD-2-Clause",
+      "dependencies": {
+        "dom-serializer": "^2.0.0",
+        "domelementtype": "^2.3.0",
+        "domhandler": "^5.0.3"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/domutils?sponsor=1"
+      }
+    },
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      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.4.7.tgz",
@@ -5439,6 +5804,18 @@
        "once": "^1.4.0"
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+    "node_modules/entities": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-4.5.0.tgz",
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+      "license": "BSD-2-Clause",
+      "engines": {
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+      },
+      "funding": {
+        "url": "https://github.com/fb55/entities?sponsor=1"
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+    },
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      "resolved": "https://registry.npmjs.org/env-editor/-/env-editor-0.4.2.tgz",
@@ -5579,6 +5956,21 @@
        "node": ">=6"
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+    "node_modules/eventemitter3": {
+      "version": "4.0.7",
+      "resolved": "https://registry.npmmirror.com/eventemitter3/-/eventemitter3-4.0.7.tgz",
+      "integrity": "sha512-8guHBZCwKnFhYdHr2ysuRWErTwhoN2X8XELRlrRwpmfeY2jjuUN4taQMsULKUVo1K4DvZl+0pgfyoysHxvmvEw==",
+      "license": "MIT"
+    },
+    "node_modules/events": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmmirror.com/events/-/events-3.3.0.tgz",
+      "integrity": "sha512-mQw+2fkQbALzQ7V0MY0IqdnXNOeTtP4r0lN9z7AAawCXgqea7bDii20AYrIBrFd/Hx0M2Ocz6S111CaFkUcb0Q==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.8.x"
+      }
+    },
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      "version": "2.2.0",
      "resolved": "https://registry.npmjs.org/exec-async/-/exec-async-2.2.0.tgz",
@@ -5756,6 +6148,18 @@
        "react-native": "*"
      }
    },
+    "node_modules/expo-crypto": {
+      "version": "14.0.2",
+      "resolved": "https://registry.npmmirror.com/expo-crypto/-/expo-crypto-14.0.2.tgz",
+      "integrity": "sha512-WRc9PBpJraJN29VD5Ef7nCecxJmZNyRKcGkNiDQC1nhY5agppzwhqh7zEzNFarE/GqDgSiaDHS8yd5EgFhP9AQ==",
+      "license": "MIT",
+      "dependencies": {
+        "base64-js": "^1.3.0"
+      },
+      "peerDependencies": {
+        "expo": "*"
+      }
+    },
    "node_modules/expo-font": {
      "version": "13.0.4",
      "resolved": "https://registry.npmjs.org/expo-font/-/expo-font-13.0.4.tgz",
@@ -6775,6 +7179,18 @@
        "node": ">=0.10.0"
      }
    },
+    "node_modules/is-network-error": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmmirror.com/is-network-error/-/is-network-error-1.3.0.tgz",
+      "integrity": "sha512-6oIwpsgRfnDiyEDLMay/GqCl3HoAtH5+RUKW29gYkL0QA+ipzpDLA16yQs7/RHCSu+BwgbJaOUqa4A99qNVQVw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
    "node_modules/is-number": {
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      "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
@@ -7093,6 +7509,15 @@
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      "license": "MIT"
    },
+    "node_modules/js-tiktoken": {
+      "version": "1.0.21",
+      "resolved": "https://registry.npmmirror.com/js-tiktoken/-/js-tiktoken-1.0.21.tgz",
+      "integrity": "sha512-biOj/6M5qdgx5TKjDnFT1ymSpM5tbd3ylwDtrQvFQSu0Z7bBYko2dF+W/aUkXUPuk6IVpRxk/3Q2sHOzGlS36g==",
+      "license": "MIT",
+      "dependencies": {
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+      }
+    },
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      "version": "4.0.0",
      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -7213,6 +7638,65 @@
        "node": ">=6"
      }
    },
+    "node_modules/langsmith": {
+      "version": "0.4.12",
+      "resolved": "https://registry.npmmirror.com/langsmith/-/langsmith-0.4.12.tgz",
+      "integrity": "sha512-YWt0jcGvKqjUgIvd78rd4QcdMss0lUkeUaqp0UpVRq7H2yNDx8H5jOUO/laWUmaPtWGgcip0qturykXe1g9Gqw==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/uuid": "^10.0.0",
+        "chalk": "^4.1.2",
+        "console-table-printer": "^2.12.1",
+        "p-queue": "^6.6.2",
+        "semver": "^7.6.3",
+        "uuid": "^10.0.0"
+      },
+      "peerDependencies": {
+        "@opentelemetry/api": "*",
+        "@opentelemetry/exporter-trace-otlp-proto": "*",
+        "@opentelemetry/sdk-trace-base": "*",
+        "openai": "*"
+      },
+      "peerDependenciesMeta": {
+        "@opentelemetry/api": {
+          "optional": true
+        },
+        "@opentelemetry/exporter-trace-otlp-proto": {
+          "optional": true
+        },
+        "@opentelemetry/sdk-trace-base": {
+          "optional": true
+        },
+        "openai": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/langsmith/node_modules/semver": {
+      "version": "7.7.3",
+      "resolved": "https://registry.npmmirror.com/semver/-/semver-7.7.3.tgz",
+      "integrity": "sha512-SdsKMrI9TdgjdweUSR9MweHA4EJ8YxHn8DFaDisvhVlUOe4BF1tLD7GAj0lIqWVl+dPb/rExr0Btby5loQm20Q==",
+      "license": "ISC",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/langsmith/node_modules/uuid": {
+      "version": "10.0.0",
+      "resolved": "https://registry.npmmirror.com/uuid/-/uuid-10.0.0.tgz",
+      "integrity": "sha512-8XkAphELsDnEGrDxUOHB3RGvXz6TeuYSGEZBOjtTtPm2lwhGBjLgOzLHB63IUWfBpNucQjND6d3AOudO+H3RWQ==",
+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
+    },
    "node_modules/leven": {
      "version": "3.1.0",
      "resolved": "https://registry.npmjs.org/leven/-/leven-3.1.0.tgz",
@@ -7684,6 +8168,12 @@
        "node": ">=0.10"
      }
    },
+    "node_modules/mdn-data": {
+      "version": "2.0.14",
+      "resolved": "https://registry.npmjs.org/mdn-data/-/mdn-data-2.0.14.tgz",
+      "integrity": "sha512-dn6wd0uw5GsdswPFfsgMp5NSB0/aDe6fK94YJV/AJDYXL6HVLWBsxeq7js7Ad+mU2K9LAlwpk6kN2D5mwCPVow==",
+      "license": "CC0-1.0"
+    },
    "node_modules/memoize-one": {
      "version": "5.2.1",
      "resolved": "https://registry.npmjs.org/memoize-one/-/memoize-one-5.2.1.tgz",
@@ -8299,6 +8789,15 @@
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      "license": "MIT"
    },
+    "node_modules/mustache": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmmirror.com/mustache/-/mustache-4.2.0.tgz",
+      "integrity": "sha512-71ippSywq5Yb7/tVYyGbkBggbU8H3u5Rz56fH60jGFgr8uHwxs+aSKeqmluIVzM0m0kB7xQjKS6qPfd0b2ZoqQ==",
+      "license": "MIT",
+      "bin": {
+        "mustache": "bin/mustache"
+      }
+    },
    "node_modules/mz": {
      "version": "2.7.0",
      "resolved": "https://registry.npmjs.org/mz/-/mz-2.7.0.tgz",
@@ -8465,6 +8964,18 @@
        "node": ">=4"
      }
    },
+    "node_modules/nth-check": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-2.1.1.tgz",
+      "integrity": "sha512-lqjrjmaOoAnWfMmBPL+XNnynZh2+swxiX3WUE0s4yEHI6m+AwrK2UZOimIRl3X/4QctVqS8AiZjFqyOGrMXb/w==",
+      "license": "BSD-2-Clause",
+      "dependencies": {
+        "boolbase": "^1.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/nth-check?sponsor=1"
+      }
+    },
    "node_modules/nullthrows": {
      "version": "1.1.1",
      "resolved": "https://registry.npmjs.org/nullthrows/-/nullthrows-1.1.1.tgz",
@@ -8713,6 +9224,49 @@
        "url": "https://github.com/sponsors/sindresorhus"
      }
    },
+    "node_modules/p-queue": {
+      "version": "6.6.2",
+      "resolved": "https://registry.npmmirror.com/p-queue/-/p-queue-6.6.2.tgz",
+      "integrity": "sha512-RwFpb72c/BhQLEXIZ5K2e+AhgNVmIejGlTgiB9MzZ0e93GRvqZ7uSi0dvRF7/XIXDeNkra2fNHBxTyPDGySpjQ==",
+      "license": "MIT",
+      "dependencies": {
+        "eventemitter3": "^4.0.4",
+        "p-timeout": "^3.2.0"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/p-retry": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmmirror.com/p-retry/-/p-retry-7.1.1.tgz",
+      "integrity": "sha512-J5ApzjyRkkf601HpEeykoiCvzHQjWxPAHhyjFcEUP2SWq0+35NKh8TLhpLw+Dkq5TZBFvUM6UigdE9hIVYTl5w==",
+      "license": "MIT",
+      "dependencies": {
+        "is-network-error": "^1.1.0"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/p-timeout": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmmirror.com/p-timeout/-/p-timeout-3.2.0.tgz",
+      "integrity": "sha512-rhIwUycgwwKcP9yTOOFK/AKsAopjjCakVqLHePO3CC6Mir1Z99xT+R63jZxAT5lFZLa2inS5h+ZS2GvR99/FBg==",
+      "license": "MIT",
+      "dependencies": {
+        "p-finally": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
    "node_modules/p-try": {
      "version": "2.2.0",
      "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
@@ -9063,6 +9617,15 @@
        "node": "^14.17.0 || ^16.13.0 || >=18.0.0"
      }
    },
+    "node_modules/process": {
+      "version": "0.11.10",
+      "resolved": "https://registry.npmmirror.com/process/-/process-0.11.10.tgz",
+      "integrity": "sha512-cdGef/drWFoydD1JsMzuFf8100nZl+GT+yacc2bEced5f9Rjk4z+WtFUTBu9PhOi9j/jfmBPu0mMEY4wIdAF8A==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.6.0"
+      }
+    },
    "node_modules/progress": {
      "version": "2.0.3",
      "resolved": "https://registry.npmjs.org/progress/-/progress-2.0.3.tgz",
@@ -9411,6 +9974,21 @@
        "react-native": "*"
      }
    },
+    "node_modules/react-native-svg": {
+      "version": "15.15.2",
+      "resolved": "https://registry.npmjs.org/react-native-svg/-/react-native-svg-15.15.2.tgz",
+      "integrity": "sha512-lpaSwA2i+eLvcEdDZyGgMEInQW99K06zjJqfMFblE0yxI0SCN5E4x6in46f0IYi6i3w2t2aaq3oOnyYBe+bo4w==",
+      "license": "MIT",
+      "dependencies": {
+        "css-select": "^5.1.0",
+        "css-tree": "^1.1.3",
+        "warn-once": "0.1.1"
+      },
+      "peerDependencies": {
+        "react": "*",
+        "react-native": "*"
+      }
+    },
    "node_modules/react-native-view-shot": {
      "version": "3.8.0",
      "resolved": "https://registry.npmjs.org/react-native-view-shot/-/react-native-view-shot-3.8.0.tgz",
@@ -9534,6 +10112,22 @@
        "node": ">=0.10.0"
      }
    },
+    "node_modules/readable-stream": {
+      "version": "4.7.0",
+      "resolved": "https://registry.npmmirror.com/readable-stream/-/readable-stream-4.7.0.tgz",
+      "integrity": "sha512-oIGGmcpTLwPga8Bn6/Z75SVaH1z5dUut2ibSyAMVhmUggWpmDn2dapB0n7f8nwaSiRtepAsfJyfXIO5DCVAODg==",
+      "license": "MIT",
+      "dependencies": {
+        "abort-controller": "^3.0.0",
+        "buffer": "^6.0.3",
+        "events": "^3.3.0",
+        "process": "^0.11.10",
+        "string_decoder": "^1.3.0"
+      },
+      "engines": {
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+      }
+    },
    "node_modules/readline": {
      "version": "1.3.0",
      "resolved": "https://registry.npmjs.org/readline/-/readline-1.3.0.tgz",
@@ -10080,6 +10674,12 @@
      "integrity": "sha512-m6UrgzFVUYawGBh1dUsWR5M2Clqic9RVXC/9f8ceNlv2IcO9j9J/z8UoCLPqtsPBFNzEpfR3xftohbfqDx8EQA==",
      "license": "MIT"
    },
+    "node_modules/simple-wcswidth": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmmirror.com/simple-wcswidth/-/simple-wcswidth-1.1.2.tgz",
+      "integrity": "sha512-j7piyCjAeTDSjzTSQ7DokZtMNwNlEAyxqSZeCS+CXH7fJ4jx3FuJ/mTW3mE+6JLs4VJBbcll0Kjn+KXI5t21Iw==",
+      "license": "MIT"
+    },
    "node_modules/sisteransi": {
      "version": "1.0.5",
      "resolved": "https://registry.npmjs.org/sisteransi/-/sisteransi-1.0.5.tgz",
@@ -10234,6 +10834,15 @@
        "node": ">=4"
      }
    },
+    "node_modules/string_decoder": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmmirror.com/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+      "license": "MIT",
+      "dependencies": {
+        "safe-buffer": "~5.2.0"
+      }
+    },
    "node_modules/string-width": {
      "version": "5.1.2",
      "resolved": "https://registry.npmjs.org/string-width/-/string-width-5.1.2.tgz",
@@ -11011,6 +11620,12 @@
      "integrity": "sha512-gQpnTgkubC6hQgdIcRdYGDSDc+SaujOdyesZQMv6JlfQee/9Mp0Qhnys6WxDWvQnL5WZdT7o2Ul187aSt0Rq+w==",
      "license": "MIT"
    },
+    "node_modules/vm-browserify": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmmirror.com/vm-browserify/-/vm-browserify-1.1.2.tgz",
+      "integrity": "sha512-2ham8XPWTONajOR0ohOKOHXkm3+gaBmGut3SRuu75xLd/RRaY6vqgh8NBYYk7+RW3u5AtzPQZG8F10LHkl0lAQ==",
+      "license": "MIT"
+    },
    "node_modules/walker": {
      "version": "1.0.8",
      "resolved": "https://registry.npmjs.org/walker/-/walker-1.0.8.tgz",
@@ -11415,6 +12030,15 @@
      "funding": {
        "url": "https://github.com/sponsors/sindresorhus"
      }
+    },
+    "node_modules/zod": {
+      "version": "4.3.6",
+      "resolved": "https://registry.npmmirror.com/zod/-/zod-4.3.6.tgz",
+      "integrity": "sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
    }
  }
 }
--- a/package.json
+++ b/package.json
@@ -11,6 +11,10 @@
  "dependencies": {
    "@expo/metro-runtime": "~4.0.1",
    "@expo/vector-icons": "~14.0.4",
+    "@langchain/core": "^1.1.18",
+    "@langchain/langgraph": "^1.1.3",
+    "@noble/ciphers": "^1.3.0",
+    "@noble/hashes": "^1.8.0",
    "@react-native-async-storage/async-storage": "^2.2.0",
    "@react-navigation/bottom-tabs": "^6.6.1",
    "@react-navigation/native": "^6.1.18",
@@ -20,6 +24,7 @@
    "expo": "~52.0.0",
    "expo-asset": "~11.0.5",
    "expo-constants": "~17.0.8",
+    "expo-crypto": "~14.0.2",
    "expo-font": "~13.0.4",
    "expo-haptics": "~14.0.0",
    "expo-image-picker": "^17.0.10",
@@ -29,11 +34,14 @@
    "react-dom": "18.3.1",
    "react-native": "^0.76.9",
    "react-native-gesture-handler": "~2.20.2",
-    "react-native-view-shot": "^3.8.0",
    "react-native-reanimated": "~3.16.1",
    "react-native-safe-area-context": "4.12.0",
    "react-native-screens": "~4.4.0",
-    "react-native-web": "~0.19.13"
+    "react-native-svg": "^15.15.2",
+    "react-native-view-shot": "^3.8.0",
+    "react-native-web": "~0.19.13",
+    "readable-stream": "^4.7.0",
+    "vm-browserify": "^1.1.2"
  },
  "devDependencies": {
    "@babel/core": "^7.25.2",
--- a/src/components/common/BiometricModal.tsx
+++ b/src/components/common/BiometricModal.tsx
@@ -62,20 +62,18 @@ export default function BiometricModal({
      Animated.sequence([
        Animated.timing(scanAnimation, {
          toValue: 1,
-          duration: 800,
+          duration: 400,
          useNativeDriver: true,
        }),
        Animated.timing(scanAnimation, {
          toValue: 0,
-          duration: 800,
+          duration: 400,
          useNativeDriver: true,
        }),
      ]),
-      { iterations: 2 }
+      { iterations: 1 }
    ).start(() => {
-      setTimeout(() => {
      onSuccess();
-      }, 300);
    });
  };

--- a/src/components/puppet/FlowPuppetSlot.tsx
+++ b/src/components/puppet/FlowPuppetSlot.tsx
@@ -0,0 +1,85 @@
+/**
+ * FlowPuppetSlot - Slot for FlowScreen to show interactive AI puppet.
+ * Composes PuppetView and optional action buttons; does not depend on FlowScreen logic.
+ */
+
+import React, { useState, useCallback } from 'react';
+import { View, Text, StyleSheet, TouchableOpacity } from 'react-native';
+import { PuppetView } from './PuppetView';
+import type { FlowPuppetSlotProps, PuppetAction } from './types';
+import { colors } from '../../theme/colors';
+import { borderRadius, spacing } from '../../theme/colors';
+
+const ACTIONS: PuppetAction[] = ['smile', 'jump', 'shake'];
+
+export function FlowPuppetSlot({
+  currentAction,
+  isTalking,
+  onAction,
+  showActionButtons = true,
+}: FlowPuppetSlotProps) {
+  const [localAction, setLocalAction] = useState<PuppetAction>(currentAction);
+
+  const effectiveAction = currentAction !== 'idle' ? currentAction : localAction;
+
+  const handleAction = useCallback(
+    (action: PuppetAction) => {
+      setLocalAction(action);
+      onAction?.(action);
+      if (['smile', 'wave', 'nod', 'shake', 'jump'].includes(action)) {
+        setTimeout(() => {
+          setLocalAction((prev) => (prev === action ? 'idle' : prev));
+          onAction?.('idle');
+        }, 2600);
+      }
+    },
+    [onAction]
+  );
+
+  return (
+    <View style={styles.wrapper}>
+      <PuppetView action={effectiveAction} isTalking={isTalking} />
+      {showActionButtons && (
+        <View style={styles.actions}>
+          {ACTIONS.map((act) => (
+            <TouchableOpacity
+              key={act}
+              style={styles.actionBtn}
+              onPress={() => handleAction(act)}
+              activeOpacity={0.8}
+            >
+              <Text style={styles.actionLabel}>{act}</Text>
+            </TouchableOpacity>
+          ))}
+        </View>
+      )}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  wrapper: {
+    alignItems: 'center',
+    justifyContent: 'center',
+    paddingVertical: spacing.lg,
+  },
+  actions: {
+    flexDirection: 'row',
+    marginTop: spacing.lg,
+    gap: spacing.sm,
+  },
+  actionBtn: {
+    paddingHorizontal: spacing.md,
+    paddingVertical: spacing.sm,
+    borderRadius: borderRadius.lg,
+    backgroundColor: colors.flow.cardBackground,
+    borderWidth: 1,
+    borderColor: colors.flow.cardBorder,
+  },
+  actionLabel: {
+    fontSize: 12,
+    fontWeight: '600',
+    color: colors.flow.primary,
+    textTransform: 'capitalize',
+  },
+});
--- a/src/components/puppet/PuppetView.tsx
+++ b/src/components/puppet/PuppetView.tsx
@@ -0,0 +1,340 @@
+/**
+ * PuppetView - Interactive blue spirit avatar (React Native).
+ * Port of airi---interactive-ai-puppet Puppet with same actions:
+ * idle, wave, nod, shake, jump, think; mouth reflects isTalking.
+ * Code isolated so FlowScreen stays unchanged except composition.
+ */
+
+import React, { useEffect, useRef } from 'react';
+import { View, StyleSheet, Animated, Easing } from 'react-native';
+import { PuppetViewProps } from './types';
+
+const PUPPET_SIZE = 160;
+
+export function PuppetView({ action, isTalking }: PuppetViewProps) {
+  const floatAnim = useRef(new Animated.Value(0)).current;
+  const bounceAnim = useRef(new Animated.Value(0)).current;
+  const shakeAnim = useRef(new Animated.Value(0)).current;
+  const thinkScale = useRef(new Animated.Value(1)).current;
+  const thinkOpacity = useRef(new Animated.Value(1)).current;
+  const smileScale = useRef(new Animated.Value(1)).current;
+
+  // Idle: gentle float
+  useEffect(() => {
+    if (action !== 'idle') return;
+    const loop = Animated.loop(
+      Animated.sequence([
+        Animated.timing(floatAnim, {
+          toValue: 1,
+          duration: 2000,
+          useNativeDriver: true,
+          easing: Easing.inOut(Easing.ease),
+        }),
+        Animated.timing(floatAnim, {
+          toValue: 0,
+          duration: 2000,
+          useNativeDriver: true,
+          easing: Easing.inOut(Easing.ease),
+        }),
+      ])
+    );
+    loop.start();
+    return () => loop.stop();
+  }, [action, floatAnim]);
+
+  // Smile: exaggerated smile scale pulse
+  useEffect(() => {
+    if (action !== 'smile') {
+      smileScale.setValue(1);
+      return;
+    }
+    const loop = Animated.loop(
+      Animated.sequence([
+        Animated.timing(smileScale, {
+          toValue: 1.12,
+          duration: 400,
+          useNativeDriver: true,
+          easing: Easing.out(Easing.ease),
+        }),
+        Animated.timing(smileScale, {
+          toValue: 1,
+          duration: 400,
+          useNativeDriver: true,
+          easing: Easing.in(Easing.ease),
+        }),
+      ]),
+      { iterations: 3 }
+    );
+    loop.start();
+    return () => loop.stop();
+  }, [action, smileScale]);
+
+  // Wave / Jump: bounce
+  useEffect(() => {
+    if (action !== 'wave' && action !== 'jump') return;
+    const loop = Animated.loop(
+      Animated.sequence([
+        Animated.timing(bounceAnim, {
+          toValue: 1,
+          duration: 400,
+          useNativeDriver: true,
+          easing: Easing.out(Easing.ease),
+        }),
+        Animated.timing(bounceAnim, {
+          toValue: 0,
+          duration: 400,
+          useNativeDriver: true,
+          easing: Easing.in(Easing.ease),
+        }),
+      ])
+    );
+    loop.start();
+    return () => loop.stop();
+  }, [action, bounceAnim]);
+
+  // Shake: wiggle
+  useEffect(() => {
+    if (action !== 'shake') return;
+    const loop = Animated.loop(
+      Animated.sequence([
+        Animated.timing(shakeAnim, {
+          toValue: 1,
+          duration: 150,
+          useNativeDriver: true,
+        }),
+        Animated.timing(shakeAnim, {
+          toValue: 0,
+          duration: 150,
+          useNativeDriver: true,
+        }),
+      ])
+    );
+    loop.start();
+    return () => loop.stop();
+  }, [action, shakeAnim]);
+
+  // Think: scale + opacity pulse
+  useEffect(() => {
+    if (action !== 'think') {
+      thinkScale.setValue(1);
+      thinkOpacity.setValue(1);
+      return;
+    }
+    const loop = Animated.loop(
+      Animated.sequence([
+        Animated.parallel([
+          Animated.timing(thinkScale, {
+            toValue: 0.92,
+            duration: 600,
+            useNativeDriver: true,
+            easing: Easing.inOut(Easing.ease),
+          }),
+          Animated.timing(thinkOpacity, {
+            toValue: 0.85,
+            duration: 600,
+            useNativeDriver: true,
+          }),
+        ]),
+        Animated.parallel([
+          Animated.timing(thinkScale, {
+            toValue: 1,
+            duration: 600,
+            useNativeDriver: true,
+            easing: Easing.inOut(Easing.ease),
+          }),
+          Animated.timing(thinkOpacity, {
+            toValue: 1,
+            duration: 600,
+            useNativeDriver: true,
+          }),
+        ]),
+      ])
+    );
+    loop.start();
+    return () => loop.stop();
+  }, [action, thinkScale, thinkOpacity]);
+
+  const floatY = floatAnim.interpolate({
+    inputRange: [0, 1],
+    outputRange: [0, -8],
+  });
+  const bounceY = bounceAnim.interpolate({
+    inputRange: [0, 1],
+    outputRange: [0, -20],
+  });
+  const shakeRotate = shakeAnim.interpolate({
+    inputRange: [0, 1],
+    outputRange: ['0deg', '8deg'],
+  });
+
+  const isBounce = action === 'wave' || action === 'jump';
+  const isShake = action === 'shake';
+  const isSmile = action === 'smile';
+
+  const mouthStyle = isTalking
+    ? [styles.mouth, styles.mouthOpen]
+    : isSmile
+      ? [styles.mouth, styles.mouthBigSmile]
+      : [styles.mouth, styles.mouthSmile];
+
+  return (
+    <Animated.View
+      style={[
+        styles.container,
+        action === 'idle' && {
+          transform: [{ translateY: floatY }],
+        },
+        isBounce && {
+          transform: [{ translateY: bounceY }],
+        },
+        isShake && {
+          transform: [{ rotate: shakeRotate }],
+        },
+        action === 'think' && {
+          transform: [{ scale: thinkScale }],
+          opacity: thinkOpacity,
+        },
+        isSmile && {
+          transform: [{ scale: smileScale }],
+        },
+      ]}
+    >
+      {/* Aura glow */}
+      <View style={styles.aura} />
+      {/* Body (droplet-like rounded rect) */}
+      <View style={styles.body}>
+        {/* Gloss */}
+        <View style={styles.gloss} />
+        {/* Cheeks */}
+        <View style={[styles.cheek, styles.cheekLeft]} />
+        <View style={[styles.cheek, styles.cheekRight]} />
+        {/* Eyes */}
+        <View style={styles.eyes}>
+          <View style={[styles.eye, styles.eyeLeft]}>
+            <View style={styles.eyeSparkle} />
+          </View>
+          <View style={[styles.eye, styles.eyeRight]}>
+            <View style={styles.eyeSparkle} />
+          </View>
+        </View>
+        {/* Mouth - default smile; open when talking; big smile when smile action */}
+        <View style={mouthStyle} />
+      </View>
+    </Animated.View>
+  );
+}
+
+const BODY_SIZE = PUPPET_SIZE * 0.9;
+const EYE_SIZE = 10;
+const EYE_OFFSET_X = 18;
+const EYE_OFFSET_Y = -8;
+
+const styles = StyleSheet.create({
+  container: {
+    width: PUPPET_SIZE,
+    height: PUPPET_SIZE,
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  aura: {
+    position: 'absolute',
+    width: PUPPET_SIZE + 40,
+    height: PUPPET_SIZE + 40,
+    borderRadius: (PUPPET_SIZE + 40) / 2,
+    backgroundColor: 'rgba(14, 165, 233, 0.15)',
+  },
+  body: {
+    width: BODY_SIZE,
+    height: BODY_SIZE,
+    borderRadius: BODY_SIZE / 2,
+    backgroundColor: '#0ea5e9',
+    alignItems: 'center',
+    justifyContent: 'center',
+    borderWidth: 0,
+    overflow: 'hidden',
+    shadowColor: '#0c4a6e',
+    shadowOffset: { width: 0, height: 8 },
+    shadowOpacity: 0.35,
+    shadowRadius: 12,
+    elevation: 8,
+  },
+  gloss: {
+    position: 'absolute',
+    top: BODY_SIZE * 0.12,
+    left: BODY_SIZE * 0.2,
+    right: BODY_SIZE * 0.2,
+    height: 4,
+    borderRadius: 2,
+    backgroundColor: 'rgba(255,255,255,0.35)',
+  },
+  cheek: {
+    position: 'absolute',
+    width: 14,
+    height: 14,
+    borderRadius: 7,
+    backgroundColor: 'rgba(59, 130, 246, 0.35)',
+  },
+  cheekLeft: {
+    left: BODY_SIZE * 0.15,
+    top: BODY_SIZE * 0.42,
+  },
+  cheekRight: {
+    right: BODY_SIZE * 0.15,
+    top: BODY_SIZE * 0.42,
+  },
+  eyes: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'center',
+    position: 'absolute',
+    top: BODY_SIZE * 0.34,
+  },
+  eye: {
+    width: EYE_SIZE,
+    height: EYE_SIZE,
+    borderRadius: EYE_SIZE / 2,
+    backgroundColor: '#0c4a6e',
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  eyeLeft: { marginRight: EYE_OFFSET_X },
+  eyeRight: { marginLeft: EYE_OFFSET_X },
+  eyeSparkle: {
+    width: 3,
+    height: 3,
+    borderRadius: 1.5,
+    backgroundColor: '#fff',
+    position: 'absolute',
+    top: 1,
+    left: 2,
+  },
+  mouth: {
+    position: 'absolute',
+    top: BODY_SIZE * 0.52,
+    backgroundColor: '#0c4a6e',
+  },
+  mouthSmile: {
+    width: 22,
+    height: 6,
+    borderBottomLeftRadius: 11,
+    borderBottomRightRadius: 11,
+    borderTopLeftRadius: 0,
+    borderTopRightRadius: 0,
+  },
+  mouthOpen: {
+    width: 18,
+    height: 6,
+    top: BODY_SIZE * 0.51,
+    borderRadius: 3,
+    backgroundColor: 'rgba(12, 74, 110, 0.9)',
+  },
+  mouthBigSmile: {
+    width: 32,
+    height: 10,
+    top: BODY_SIZE * 0.51,
+    borderBottomLeftRadius: 16,
+    borderBottomRightRadius: 16,
+    borderTopLeftRadius: 0,
+    borderTopRightRadius: 0,
+  },
+});
--- a/src/components/puppet/index.ts
+++ b/src/components/puppet/index.ts
@@ -0,0 +1,3 @@
+export { PuppetView } from './PuppetView';
+export { FlowPuppetSlot } from './FlowPuppetSlot';
+export type { PuppetAction, PuppetState, PuppetViewProps, FlowPuppetSlotProps } from './types';
--- a/src/components/puppet/types.ts
+++ b/src/components/puppet/types.ts
@@ -0,0 +1,28 @@
+/**
+ * Puppet types - compatible with airi interactive AI puppet semantics.
+ * Used for FlowScreen multimodal avatar (action + talking state).
+ */
+
+export type PuppetAction = 'idle' | 'wave' | 'nod' | 'shake' | 'jump' | 'think' | 'talk' | 'smile';
+
+export interface PuppetState {
+  currentAction: PuppetAction;
+  isTalking: boolean;
+  isThinking: boolean;
+}
+
+export interface PuppetViewProps {
+  action: PuppetAction;
+  isTalking: boolean;
+}
+
+export interface FlowPuppetSlotProps {
+  /** Current action (idle, wave, nod, shake, jump, think). */
+  currentAction: PuppetAction;
+  /** True when AI is "speaking" (e.g. streaming or responding). */
+  isTalking: boolean;
+  /** Optional: allow parent to set action (e.g. from AI tool call). */
+  onAction?: (action: PuppetAction) => void;
+  /** Show quick action buttons (wave, jump, shake) for interactivity. */
+  showActionButtons?: boolean;
+}
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -51,11 +51,13 @@ export const API_ENDPOINTS = {
    CREATE: '/assets/create',
    CLAIM: '/assets/claim',
    ASSIGN: '/assets/assign',
+    DELETE: '/assets/delete',
  },

  // AI Services
  AI: {
    PROXY: '/ai/proxy',
+    GET_ROLES: '/get_ai_roles',
  },

  // Admin Operations
@@ -67,9 +69,9 @@ export const API_ENDPOINTS = {
 // =============================================================================
 // Vault storage (user-isolated, multi-account)
 // =============================================================================
-// - AsyncStorage keys for vault state (S0 share, initialized flag).
-// - User-scoped: each account has its own keys so vault state is isolated.
-// - Store: use getVaultStorageKeys(userId) and write to INITIALIZED / SHARE_DEVICE.
+// - AsyncStorage keys for vault state (S0 share, initialized flag, mnemonic part backup).
+// - User-scoped: each account has its own keys so vault/mnemonic state is isolated.
+// - Store: use getVaultStorageKeys(userId) and write to INITIALIZED / SHARE_DEVICE / MNEMONIC_PART_LOCAL.
 // - Clear: use same keys in multiRemove (e.g. MeScreen Reset Vault State).
 // - Multi-account: same device, multiple users → each has independent vault (no cross-user leakage).

@@ -79,21 +81,30 @@ const VAULT_KEY_PREFIX = 'sentinel_vault';
 export const VAULT_STORAGE_KEYS = {
  INITIALIZED: 'sentinel_vault_initialized',
  SHARE_DEVICE: 'sentinel_vault_s0',
+  MNEMONIC_PART_LOCAL: 'sentinel_mnemonic_part_local',
 } as const;

 /**
 * Returns vault storage keys for the given user (user isolation).
- * - Use for: reading S0, writing S0 after mnemonic, clearing on Reset Vault State.
+ * - Use for: reading/writing S0, mnemonic part backup, clearing on Reset Vault State.
 * - userId null → guest namespace (_guest). userId set → per-user namespace (_u{userId}).
 */
 export function getVaultStorageKeys(userId: number | string | null): {
  INITIALIZED: string;
  SHARE_DEVICE: string;
+  MNEMONIC_PART_LOCAL: string;
+  AES_KEY: string;
+  SHARE_SERVER: string;
+  SHARE_HEIR: string;
 } {
  const suffix = userId != null ? `_u${userId}` : '_guest';
  return {
    INITIALIZED: `${VAULT_KEY_PREFIX}_initialized${suffix}`,
    SHARE_DEVICE: `${VAULT_KEY_PREFIX}_s0${suffix}`,
+    MNEMONIC_PART_LOCAL: `sentinel_mnemonic_part_local${suffix}`,
+    AES_KEY: `sentinel_aes_key${suffix}`,
+    SHARE_SERVER: `sentinel_share_server${suffix}`,
+    SHARE_HEIR: `sentinel_share_heir${suffix}`,
  };
 }

--- a/src/context/AuthContext.tsx
+++ b/src/context/AuthContext.tsx
@@ -7,8 +7,9 @@

 import React, { createContext, useContext, useState, useEffect, ReactNode } from 'react';
 import AsyncStorage from '@react-native-async-storage/async-storage';
-import { User, LoginRequest, RegisterRequest } from '../types';
+import { User, LoginRequest, RegisterRequest, AIRole } from '../types';
 import { authService } from '../services/auth.service';
+import { aiService } from '../services/ai.service';
 import { storageService } from '../services/storage.service';

 // =============================================================================
@@ -18,11 +19,13 @@ import { storageService } from '../services/storage.service';
 interface AuthContextType {
  user: User | null;
  token: string | null;
+  aiRoles: AIRole[];
  isLoading: boolean;
  isInitializing: boolean;
  signIn: (credentials: LoginRequest) => Promise<void>;
  signUp: (data: RegisterRequest) => Promise<void>;
  signOut: () => void;
+  refreshAIRoles: () => Promise<void>;
 }

 // Storage keys
@@ -44,6 +47,7 @@ const AuthContext = createContext<AuthContextType | undefined>(undefined);
 export function AuthProvider({ children }: { children: ReactNode }) {
  const [user, setUser] = useState<User | null>(null);
  const [token, setToken] = useState<string | null>(null);
+  const [aiRoles, setAIRoles] = useState<AIRole[]>([]);
  const [isLoading, setIsLoading] = useState(false);
  const [isInitializing, setIsInitializing] = useState(true);

@@ -66,6 +70,8 @@ export function AuthProvider({ children }: { children: ReactNode }) {
        setToken(storedToken);
        setUser(JSON.parse(storedUser));
        console.log('[Auth] Restored session for user:', JSON.parse(storedUser).username);
+        // Fetch AI roles after restoring session
+        fetchAIRoles(storedToken);
      }
    } catch (error) {
      console.error('[Auth] Failed to load stored auth:', error);
@@ -74,6 +80,29 @@ export function AuthProvider({ children }: { children: ReactNode }) {
    }
  };

+  /**
+   * Fetch AI roles from API
+   */
+  const fetchAIRoles = async (authToken: string) => {
+    console.log('[Auth] Fetching AI roles with token:', authToken ? `${authToken.substring(0, 10)}...` : 'MISSING');
+    try {
+      const roles = await aiService.getAIRoles(authToken);
+      setAIRoles(roles);
+      console.log('[Auth] AI roles fetched successfully:', roles.length);
+    } catch (error) {
+      console.error('[Auth] Failed to fetch AI roles:', error);
+    }
+  };
+
+  /**
+   * Manual refresh of AI roles
+   */
+  const refreshAIRoles = async () => {
+    if (token) {
+      await fetchAIRoles(token);
+    }
+  };
+
  /**
   * Save authentication to AsyncStorage
   */
@@ -114,6 +143,8 @@ export function AuthProvider({ children }: { children: ReactNode }) {
      setToken(response.access_token);
      setUser(response.user);
      await saveAuth(response.access_token, response.user);
+      // Fetch AI roles immediately after login
+      await fetchAIRoles(response.access_token);
    } catch (error) {
      throw error;
    } finally {
@@ -143,7 +174,10 @@ export function AuthProvider({ children }: { children: ReactNode }) {
  const signOut = () => {
    setUser(null);
    setToken(null);
+    setAIRoles([]);
    clearAuth();
+
+
    //storageService.clearAllData();
  };

@@ -152,11 +186,13 @@ export function AuthProvider({ children }: { children: ReactNode }) {
      value={{
        user,
        token,
+        aiRoles,
        isLoading,
        isInitializing,
        signIn,
        signUp,
-        signOut
+        signOut,
+        refreshAIRoles
      }}
    >
      {children}
--- a/src/hooks/useVaultAssets.ts
+++ b/src/hooks/useVaultAssets.ts
@@ -6,9 +6,12 @@

 import { useState, useEffect, useCallback } from 'react';
 import * as bip39 from 'bip39';
+import AsyncStorage from '@react-native-async-storage/async-storage';
 import { useAuth } from '../context/AuthContext';
 import { assetsService } from '../services/assets.service';
-import { createAssetPayload } from '../services/vault.service';
+import { getVaultStorageKeys, DEBUG_MODE } from '../config';
+import { SentinelVault } from '../utils/crypto_core';
+import { storageService } from '../services/storage.service';
 import {
  initialVaultAssets,
  mapApiAssetsToVaultAssets,
@@ -35,6 +38,10 @@ export interface UseVaultAssetsReturn {
  refreshAssets: () => Promise<void>;
  /** Create asset via POST /assets/create; on success refreshes list */
  createAsset: (params: { title: string; content: string }) => Promise<CreateAssetResult>;
+  /** Delete asset via POST /assets/delete; on success refreshes list */
+  deleteAsset: (assetId: number) => Promise<CreateAssetResult>;
+  /** Assign asset to heir via POST /assets/assign */
+  assignAsset: (assetId: number, heirEmail: string) => Promise<CreateAssetResult>;
  /** True while create request is in flight */
  isSealing: boolean;
  /** Error message from last create failure (non-401) */
@@ -51,7 +58,7 @@ export interface UseVaultAssetsReturn {
 * Vault assets list + create. Fetches on unlock when token exists; keeps mock on error.
 */
 export function useVaultAssets(isUnlocked: boolean): UseVaultAssetsReturn {
-  const { token, signOut } = useAuth();
+  const { user, token, signOut } = useAuth();
  const [assets, setAssets] = useState<VaultAsset[]>(initialVaultAssets);
  const [isSealing, setIsSealing] = useState(false);
  const [createError, setCreateError] = useState<string | null>(null);
@@ -63,10 +70,14 @@ export function useVaultAssets(isUnlocked: boolean): UseVaultAssetsReturn {
      if (Array.isArray(list)) {
        setAssets(mapApiAssetsToVaultAssets(list as ApiAsset[]));
      }
-    } catch {
+    } catch (err: unknown) {
+      const rawMessage = err instanceof Error ? err.message : String(err ?? '');
+      if (/Could not validate credentials/i.test(rawMessage)) {
+        signOut();
+      }
      // Keep current assets (mock or previous fetch)
    }
-  }, [token]);
+  }, [token, signOut]);

  // Fetch list when unlocked and token exists
  useEffect(() => {
@@ -79,7 +90,13 @@ export function useVaultAssets(isUnlocked: boolean): UseVaultAssetsReturn {
          setAssets(mapApiAssetsToVaultAssets(list as ApiAsset[]));
        }
      })
-      .catch(() => {
+      .catch((err) => {
+        if (!cancelled) {
+          const rawMessage = err instanceof Error ? err.message : String(err ?? '');
+          if (/Could not validate credentials/i.test(rawMessage)) {
+            signOut();
+          }
+        }
        // Keep initial (mock) assets
      });
    return () => {
@@ -101,22 +118,45 @@ export function useVaultAssets(isUnlocked: boolean): UseVaultAssetsReturn {
      setIsSealing(true);
      setCreateError(null);
      try {
-        const wordList = bip39.wordlists.english;
-        const payload = await createAssetPayload(
-          title.trim(),
-          content.trim(),
-          wordList,
-          'note',
-          0
-        );
-        await assetsService.createAsset(
+        const vaultKeys = getVaultStorageKeys(user?.id ?? null);
+        const [s1Str, aesKeyHex, s0Str, s2Str] = await Promise.all([
+          AsyncStorage.getItem(vaultKeys.SHARE_SERVER),
+          AsyncStorage.getItem(vaultKeys.AES_KEY),
+          AsyncStorage.getItem(vaultKeys.SHARE_DEVICE),
+          AsyncStorage.getItem(vaultKeys.SHARE_HEIR),
+        ]);
+
+        if (!s1Str || !aesKeyHex) {
+          throw new Error('Vault keys missing. Please re-unlock your vault.');
+        }
+
+        const vault = new SentinelVault();
+        const aesKey = Buffer.from(aesKeyHex, 'hex');
+        const encryptedBuffer = vault.encryptData(aesKey, content.trim());
+        const content_inner_encrypted = encryptedBuffer.toString('hex');
+
+        if (DEBUG_MODE) {
+          console.log('[DEBUG] Crypto Data during Asset Creation:');
+          console.log('  s0 (Device):', s0Str);
+          console.log('  s1 (Server):', s1Str);
+          console.log('  s2 (Heir):  ', s2Str);
+          console.log('  AES Key:    ', aesKeyHex);
+          console.log('  Encrypted:  ', content_inner_encrypted);
+        }
+
+        const createdAsset = await assetsService.createAsset(
          {
-            title: payload.title,
-            private_key_shard: payload.private_key_shard,
-            content_inner_encrypted: payload.content_inner_encrypted,
+            title: title.trim(),
+            private_key_shard: s1Str,
+            content_inner_encrypted,
          },
          token
        );
+
+        // Backup plaintext content locally
+        if (createdAsset && createdAsset.id && user?.id) {
+          await storageService.saveAssetBackup(createdAsset.id, content, user.id);
+        }
        await refreshAssets();
        return { success: true };
      } catch (err: unknown) {
@@ -143,9 +183,85 @@ export function useVaultAssets(isUnlocked: boolean): UseVaultAssetsReturn {
        setIsSealing(false);
      }
    },
+    [token, user, refreshAssets, signOut]
+  );
+
+  const deleteAsset = useCallback(
+    async (assetId: number): Promise<CreateAssetResult> => {
+      if (!token) {
+        return { success: false, error: 'Not logged in.' };
+      }
+      setIsSealing(true);
+      setCreateError(null);
+      try {
+        await assetsService.deleteAsset(assetId, token);
+        await refreshAssets();
+        return { success: true };
+      } catch (err: unknown) {
+        const status =
+          err && typeof err === 'object' && 'status' in err
+            ? (err as { status?: number }).status
+            : undefined;
+        const rawMessage =
+          err instanceof Error ? err.message : String(err ?? 'Failed to delete.');
+        const isUnauthorized =
+          status === 401 || /401|Unauthorized/i.test(rawMessage);
+
+        if (isUnauthorized) {
+          signOut();
+          return { success: false, isUnauthorized: true };
+        }
+
+        const friendlyMessage = /failed to fetch|network error/i.test(rawMessage)
+          ? 'Network error. Please check that the backend is running and reachable.'
+          : rawMessage;
+        setCreateError(friendlyMessage);
+        return { success: false, error: friendlyMessage };
+      } finally {
+        setIsSealing(false);
+      }
+    },
    [token, refreshAssets, signOut]
  );

+  const assignAsset = useCallback(
+    async (assetId: number, heirEmail: string): Promise<CreateAssetResult> => {
+      if (!token) {
+        return { success: false, error: 'Not logged in.' };
+      }
+      setIsSealing(true);
+      setCreateError(null);
+      try {
+        await assetsService.assignAsset({ asset_id: assetId, heir_email: heirEmail }, token);
+        await refreshAssets();
+        return { success: true };
+      } catch (err: unknown) {
+        const status =
+          err && typeof err === 'object' && 'status' in err
+            ? (err as { status?: number }).status
+            : undefined;
+        const rawMessage =
+          err instanceof Error ? err.message : String(err ?? 'Failed to assign.');
+        const isUnauthorized =
+          status === 401 || /401|Unauthorized/i.test(rawMessage);
+
+        if (isUnauthorized) {
+          signOut();
+          return { success: false, isUnauthorized: true };
+        }
+
+        const friendlyMessage = /failed to fetch|network error/i.test(rawMessage)
+          ? 'Network error. Please check that the backend is running and reachable.'
+          : rawMessage;
+        setCreateError(friendlyMessage);
+        return { success: false, error: friendlyMessage };
+      } finally {
+        setIsSealing(false);
+      }
+    },
+    [token, signOut]
+  );
+
  const clearCreateError = useCallback(() => setCreateError(null), []);

  return {
@@ -153,6 +269,8 @@ export function useVaultAssets(isUnlocked: boolean): UseVaultAssetsReturn {
    setAssets,
    refreshAssets,
    createAsset,
+    deleteAsset,
+    assignAsset,
    isSealing,
    createError,
    clearCreateError,
--- a/src/polyfills.ts
+++ b/src/polyfills.ts
@@ -0,0 +1,45 @@
+/**
+ * Polyfills that must run before any other app code (including LangChain/LangGraph).
+ * This file is imported as the very first line in App.tsx so that ReadableStream
+ * and crypto.getRandomValues exist before @langchain/core / uuid are loaded.
+ */
+import 'web-streams-polyfill';
+
+// Ensure globalThis has ReadableStream (main polyfill may not patch in RN/Metro)
+const g = typeof globalThis !== 'undefined' ? globalThis : (typeof global !== 'undefined' ? global : (typeof self !== 'undefined' ? self : {}));
+if (typeof (g as any).ReadableStream === 'undefined') {
+  const ponyfill = require('web-streams-polyfill/dist/ponyfill.js');
+  (g as any).ReadableStream = ponyfill.ReadableStream;
+  (g as any).WritableStream = ponyfill.WritableStream;
+  (g as any).TransformStream = ponyfill.TransformStream;
+}
+
+// Polyfill crypto.getRandomValues for React Native/Expo (required by uuid, LangChain, etc.)
+if (typeof g !== 'undefined') {
+  const cryptoObj = (g as any).crypto;
+  if (!cryptoObj || typeof (cryptoObj.getRandomValues) !== 'function') {
+    try {
+      const ExpoCrypto = require('expo-crypto');
+      const getRandomValues = (array: ArrayBufferView): ArrayBufferView => {
+        ExpoCrypto.getRandomValues(array);
+        return array;
+      };
+      if (!(g as any).crypto) (g as any).crypto = {};
+      (g as any).crypto.getRandomValues = getRandomValues;
+    } catch (e) {
+      console.warn('[polyfills] crypto.getRandomValues polyfill failed:', e);
+    }
+  }
+}
+
+// Polyfill AbortSignal.prototype.throwIfAborted (required by fetch/LangChain in RN; not present in older runtimes)
+const AbortSignalGlobal = (g as any).AbortSignal;
+if (typeof AbortSignalGlobal === 'function' && AbortSignalGlobal.prototype && typeof AbortSignalGlobal.prototype.throwIfAborted !== 'function') {
+  AbortSignalGlobal.prototype.throwIfAborted = function (this: AbortSignal) {
+    if (this.aborted) {
+      const e = new Error('Aborted');
+      e.name = 'AbortError';
+      throw e;
+    }
+  };
+}
--- a/src/screens/FlowScreen.tsx
+++ b/src/screens/FlowScreen.tsx
@@ -28,11 +28,20 @@ import {
 import { LinearGradient } from 'expo-linear-gradient';
 import { Ionicons, Feather, FontAwesome5 } from '@expo/vector-icons';
 import * as ImagePicker from 'expo-image-picker';
+import { AIRole } from '../types';
 import { colors, typography, spacing, borderRadius, shadows } from '../theme/colors';
-import { aiService } from '../services/ai.service';
+import { aiService, AIMessage } from '../services/ai.service';
+import { langGraphService } from '../services/langgraph.service';
+import { HumanMessage, AIMessage as LangChainAIMessage, SystemMessage } from "@langchain/core/messages";
+import { assetsService } from '../services/assets.service';
 import { useAuth } from '../context/AuthContext';
-import { AI_CONFIG } from '../config';
+import { AI_CONFIG, getVaultStorageKeys } from '../config';
 import { storageService } from '../services/storage.service';
+import AsyncStorage from '@react-native-async-storage/async-storage';
+import { SentinelVault } from '../utils/crypto_core';
+import { Buffer } from 'buffer';
+import { FlowPuppetSlot } from '../components/puppet';
+import type { PuppetAction } from '../components/puppet';

 // =============================================================================
 // Type Definitions
@@ -59,7 +68,7 @@ interface ChatSession {
 // =============================================================================

 export default function FlowScreen() {
-  const { token, user, signOut } = useAuth();
+  const { token, user, signOut, aiRoles, refreshAIRoles } = useAuth();
  const scrollViewRef = useRef<ScrollView>(null);

  // Current conversation state
@@ -67,10 +76,11 @@ export default function FlowScreen() {
  const [newContent, setNewContent] = useState('');
  const [isSending, setIsSending] = useState(false);
  const [isRecording, setIsRecording] = useState(false);
-  const [selectedImage, setSelectedImage] = useState<string | null>(null);
+  /** Attached image for next send (uri + base64); user can add optional text then send together */
+  const [attachedImage, setAttachedImage] = useState<{ uri: string; base64: string } | null>(null);

-  // AI Role state
-  const [selectedRole, setSelectedRole] = useState(AI_CONFIG.ROLES[0]);
+  // AI Role state - start with null to detect first load
+  const [selectedRole, setSelectedRole] = useState<AIRole | null>(aiRoles[0] || null);
  const [showRoleModal, setShowRoleModal] = useState(false);
  const [expandedRoleId, setExpandedRoleId] = useState<string | null>(null);

@@ -78,6 +88,21 @@ export default function FlowScreen() {
  const [showHistoryModal, setShowHistoryModal] = useState(false);
  const modalSlideAnim = useRef(new Animated.Value(0)).current;

+  // Summary state
+  const [showSummaryConfirmModal, setShowSummaryConfirmModal] = useState(false);
+  const [showSummaryResultModal, setShowSummaryResultModal] = useState(false);
+  const [isSummarizing, setIsSummarizing] = useState(false);
+  const [generatedSummary, setGeneratedSummary] = useState('');
+
+  // Save to Vault state
+  const [showVaultConfirmModal, setShowVaultConfirmModal] = useState(false);
+  const [showSaveResultModal, setShowSaveResultModal] = useState(false);
+  const [saveResult, setSaveResult] = useState<{ success: boolean; message: string }>({ success: true, message: '' });
+  const [isSavingToVault, setIsSavingToVault] = useState(false);
+
+  // AI multimodal puppet (optional; does not affect existing chat logic)
+  const [puppetAction, setPuppetAction] = useState<PuppetAction>('idle');
+
  const [chatHistory, setChatHistory] = useState<ChatSession[]>([
    // Sample history data
    {
@@ -143,9 +168,9 @@ export default function FlowScreen() {
  // Load messages whenever role changes
  useEffect(() => {
    const loadRoleMessages = async () => {
-      if (!user) return;
+      if (!user || !selectedRole) return;
      try {
-        const savedMessages = await storageService.getCurrentChat(selectedRole.id, user.id);
+        const savedMessages = await storageService.getCurrentChat(selectedRole?.id || '', user.id);
        if (savedMessages) {
          const formattedMessages = savedMessages.map((msg: any) => ({
            ...msg,
@@ -156,18 +181,48 @@ export default function FlowScreen() {
          setMessages([]);
        }
      } catch (error) {
-        console.error(`Failed to load messages for role ${selectedRole.id}:`, error);
+        if (selectedRole) {
+          console.error(`Failed to load messages for role ${selectedRole?.id}:`, error);
+        }
        setMessages([]);
      }
    };

    loadRoleMessages();
-  }, [selectedRole.id, user]);
+  }, [selectedRole?.id, user]);
+
+  // Ensure we have a valid selected role from the dynamic list
+  useEffect(() => {
+    if (aiRoles.length > 0) {
+      if (!selectedRole) {
+        // Initial load or first time roles become available
+        setSelectedRole(aiRoles[0]);
+      } else {
+        // If roles refreshed, make sure current selectedRole is still valid or updated
+        const updatedRole = aiRoles.find(r => r.id === selectedRole?.id);
+        if (updatedRole) {
+          setSelectedRole(updatedRole);
+        } else {
+          // Current role no longer exists in dynamic list, fallback to first
+          setSelectedRole(aiRoles[0]);
+        }
+      }
+    } else if (!selectedRole) {
+      // Fallback if no dynamic roles yet
+      setSelectedRole(AI_CONFIG.ROLES[0]);
+    }
+  }, [aiRoles]);
+
+  // Sync puppet action with sending state (think while AI is responding)
+  useEffect(() => {
+    if (isSending) setPuppetAction('think');
+    else setPuppetAction((prev) => (prev === 'think' ? 'idle' : prev));
+  }, [isSending]);

  // 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 (user && selectedRole && messages.length >= 0) { // Save even if empty to allow clearing
+      storageService.saveCurrentChat(selectedRole?.id || '', messages, user.id);
    }

    if (messages.length > 0) {
@@ -175,7 +230,7 @@ export default function FlowScreen() {
        scrollViewRef.current?.scrollToEnd({ animated: true });
      }, 100);
    }
-  }, [messages, selectedRole.id, user]);
+  }, [messages, selectedRole?.id, user]);

  // Save history when it changes
  useEffect(() => {
@@ -210,10 +265,12 @@ export default function FlowScreen() {
  // =============================================================================

  /**
-   * Handle sending a message to AI
+   * Handle sending a message to AI (text-only via LangGraph, or image + optional text via vision API)
   */
  const handleSendMessage = async () => {
-    if (!newContent.trim() || isSending) return;
+    const hasText = !!newContent.trim();
+    const hasImage = !!attachedImage;
+    if ((!hasText && !hasImage) || isSending || !selectedRole) return;

    // Check authentication
    if (!token) {
@@ -225,11 +282,64 @@ export default function FlowScreen() {
      return;
    }

-    const userMessage = newContent.trim();
    setIsSending(true);
+
+    // --- Path: send with image (optional text) ---
+    if (hasImage && attachedImage) {
+      const imageUri = attachedImage.uri;
+      const imageBase64 = attachedImage.base64;
+      const userText = newContent.trim() || '请描述或分析这张图片';
+      setAttachedImage(null);
+      setNewContent('');
+
+      const userMsg: ChatMessage = {
+        id: Date.now().toString(),
+        role: 'user',
+        content: userText,
+        imageUri,
+        createdAt: new Date(),
+      };
+      setMessages(prev => [...prev, userMsg]);
+
+      try {
+        const aiResponse = await aiService.sendMessageWithImage(userText, imageBase64, token);
+        const aiMsg: ChatMessage = {
+          id: (Date.now() + 1).toString(),
+          role: 'assistant',
+          content: aiResponse,
+          createdAt: new Date(),
+        };
+        setMessages(prev => [...prev, aiMsg]);
+      } catch (error) {
+        console.error('AI image request failed:', error);
+        const errorMessage = error instanceof Error ? error.message : String(error);
+        const isAuthError =
+          errorMessage.includes('401') ||
+          errorMessage.includes('Unauthorized') ||
+          errorMessage.includes('credentials') ||
+          errorMessage.includes('validate');
+        if (isAuthError) {
+          signOut();
+          Alert.alert('Session Expired', 'Your login session has expired. Please login again.', [{ text: 'OK' }]);
+          return;
+        }
+        const errorMsg: ChatMessage = {
+          id: (Date.now() + 1).toString(),
+          role: 'assistant',
+          content: `⚠️ Error: ${errorMessage}`,
+          createdAt: new Date(),
+        };
+        setMessages(prev => [...prev, errorMsg]);
+      } finally {
+        setIsSending(false);
+      }
+      return;
+    }
+
+    // --- Path: text-only via LangGraph (unchanged) ---
+    const userMessage = newContent.trim();
    setNewContent('');

-    // Add user message immediately
    const userMsg: ChatMessage = {
      id: Date.now().toString(),
      role: 'user',
@@ -239,10 +349,15 @@ export default function FlowScreen() {
    setMessages(prev => [...prev, userMsg]);

    try {
-      // Call AI proxy with selected role's system prompt
-      const aiResponse = await aiService.sendMessage(userMessage, token, selectedRole.systemPrompt);
+      const history: (HumanMessage | LangChainAIMessage | SystemMessage)[] = messages.map(msg => {
+        if (msg.role === 'user') return new HumanMessage(msg.content);
+        return new LangChainAIMessage(msg.content);
+      });
+      const systemPrompt = new SystemMessage(selectedRole?.systemPrompt || '');
+      const currentMsg = new HumanMessage(userMessage);
+      const fullMessages = [systemPrompt, ...history, currentMsg];
+      const aiResponse = await langGraphService.execute(fullMessages, token);

-      // Add AI response
      const aiMsg: ChatMessage = {
        id: (Date.now() + 1).toString(),
        role: 'assistant',
@@ -250,20 +365,15 @@ export default function FlowScreen() {
        createdAt: new Date(),
      };
      setMessages(prev => [...prev, aiMsg]);
-
    } catch (error) {
      console.error('AI request failed:', error);
-
      const errorMessage = error instanceof Error ? error.message : String(error);
-
-      // Handle authentication errors (401, credentials, unauthorized)
      const isAuthError =
        errorMessage.includes('401') ||
        errorMessage.includes('credentials') ||
        errorMessage.includes('Unauthorized') ||
        errorMessage.includes('Not authenticated') ||
        errorMessage.includes('validate');
-
      if (isAuthError) {
        signOut();
        Alert.alert(
@@ -273,8 +383,6 @@ export default function FlowScreen() {
        );
        return;
      }
-
-      // Show error as AI message
      const errorMsg: ChatMessage = {
        id: (Date.now() + 1).toString(),
        role: 'assistant',
@@ -296,17 +404,15 @@ export default function FlowScreen() {
  };

  /**
-   * Handle image attachment - pick image and analyze with AI
+   * Handle image attachment - pick image and attach to next message (user can add text then send)
   */
  const handleAddImage = async () => {
-    // Request permission
    const { status } = await ImagePicker.requestMediaLibraryPermissionsAsync();
    if (status !== 'granted') {
      Alert.alert('Permission Required', 'Please grant permission to access photos');
      return;
    }

-    // Pick image
    const result = await ImagePicker.launchImageLibraryAsync({
      mediaTypes: ImagePicker.MediaTypeOptions.Images,
      allowsEditing: true,
@@ -315,78 +421,11 @@ export default function FlowScreen() {
    });

    if (!result.canceled && result.assets[0]) {
-      const imageAsset = result.assets[0];
-      setSelectedImage(imageAsset.uri);
-
-      // Check authentication
-      if (!token) {
-        Alert.alert(
-          'Login Required',
-          'Please login to analyze images',
-          [{ text: 'OK', onPress: () => signOut() }]
-        );
-        return;
-      }
-
-      setIsSending(true);
-
-      // Add user message with image
-      const userMsg: ChatMessage = {
-        id: Date.now().toString(),
-        role: 'user',
-        content: 'Analyze this image',
-        imageUri: imageAsset.uri,
-        createdAt: new Date(),
-      };
-      setMessages(prev => [...prev, userMsg]);
-
-      try {
-        // Call AI with image (using base64)
-        const aiResponse = await aiService.sendMessageWithImage(
-          'Please describe and analyze this image in detail.',
-          imageAsset.base64 || '',
-          token
-        );
-
-        const aiMsg: ChatMessage = {
-          id: (Date.now() + 1).toString(),
-          role: 'assistant',
-          content: aiResponse,
-          createdAt: new Date(),
-        };
-        setMessages(prev => [...prev, aiMsg]);
-      } catch (error) {
-        console.error('AI image analysis failed:', error);
-        const errorMessage = error instanceof Error ? error.message : 'Unknown error';
-
-        // Handle authentication errors
-        const isAuthError =
-          errorMessage.includes('401') ||
-          errorMessage.includes('Unauthorized') ||
-          errorMessage.includes('credentials') ||
-          errorMessage.includes('validate');
-
-        if (isAuthError) {
-          signOut();
-          Alert.alert(
-            'Session Expired',
-            'Your login session has expired. Please login again.',
-            [{ text: 'OK' }]
-          );
-          return;
-        }
-
-        const errorMsg: ChatMessage = {
-          id: (Date.now() + 1).toString(),
-          role: 'assistant',
-          content: `⚠️ Error analyzing image: ${errorMessage}`,
-          createdAt: new Date(),
-        };
-        setMessages(prev => [...prev, errorMsg]);
-      } finally {
-        setIsSending(false);
-        setSelectedImage(null);
-      }
+      const asset = result.assets[0];
+      setAttachedImage({
+        uri: asset.uri,
+        base64: asset.base64 || '',
+      });
    }
  };

@@ -408,8 +447,8 @@ export default function FlowScreen() {

    // Clear current messages and storage for this role
    setMessages([]);
-    if (user) {
-      storageService.saveCurrentChat(selectedRole.id, [], user.id);
+    if (user && selectedRole) {
+      storageService.saveCurrentChat(selectedRole?.id || '', [], user.id);
    }
    closeHistoryModal();
  };
@@ -453,6 +492,112 @@ export default function FlowScreen() {
    );
  };

+  /**
+   * Handle generating summary for current conversation
+   */
+  const handleGenerateSummary = async () => {
+    if (messages.length === 0) {
+      Alert.alert('No Messages', 'There are no messages to summarize.');
+      return;
+    }
+
+    if (!token) {
+      Alert.alert('Login Required', 'Please login to generate a summary.');
+      return;
+    }
+
+    setShowSummaryConfirmModal(false);
+    setIsSummarizing(true);
+
+    try {
+      // Convert messages to AIMessage format
+      const aiMessages: AIMessage[] = messages.map(msg => ({
+        role: msg.role,
+        content: msg.content,
+      }));
+
+      const summary = await aiService.summarizeChat(aiMessages, token);
+      setGeneratedSummary(summary);
+      setShowSummaryResultModal(true);
+    } catch (error) {
+      console.error('Failed to generate summary:', error);
+      Alert.alert('Error', 'Failed to generate summary. Please try again later.');
+    } finally {
+      setIsSummarizing(false);
+    }
+  };
+
+  /**
+   * Handle saving the generated summary to the vault
+   */
+  const handleSaveToVault = async () => {
+    if (!generatedSummary || isSavingToVault) return;
+
+    if (!token) {
+      Alert.alert('Login Required', 'Please login to save to vault.');
+      return;
+    }
+
+    setShowVaultConfirmModal(false);
+    setIsSavingToVault(true);
+
+    try {
+      // Retrieve vault keys
+      if (!user) {
+        Alert.alert('Error', 'User information not found. Please login again.');
+        return;
+      }
+      const vaultKeys = getVaultStorageKeys(user.id);
+      const shareServer = await AsyncStorage.getItem(vaultKeys.SHARE_SERVER);
+      const aesKeyHex = await AsyncStorage.getItem(vaultKeys.AES_KEY);
+
+      if (!shareServer || !aesKeyHex) {
+        Alert.alert(
+          'Vault Not Initialized',
+          'Your vault is not fully initialized. Please set it up in the Vault tab first.'
+        );
+        return;
+      }
+
+      // Encrypt summary with AES key
+      const vault = new SentinelVault();
+      const aesKey = Buffer.from(aesKeyHex, 'hex');
+      const encryptedSummary = vault.encryptData(aesKey, generatedSummary).toString('hex');
+
+      // Create asset in backend
+      const createdAsset = await assetsService.createAsset({
+        title: `Chat Summary - ${new Date().toLocaleDateString()}`,
+        private_key_shard: shareServer,
+        content_inner_encrypted: encryptedSummary,
+      }, token);
+
+      // Backup plaintext content locally
+      if (createdAsset && createdAsset.id && user?.id) {
+        await storageService.saveAssetBackup(createdAsset.id, generatedSummary, user.id);
+      }
+
+      setSaveResult({ success: true, message: 'Summary encrypted and saved to your vault successfully.' });
+      setShowSaveResultModal(true);
+    } catch (error) {
+      console.error('Failed to save to vault:', error);
+      setSaveResult({ success: false, message: 'Failed to save summary to vault. Please try again.' });
+      setShowSaveResultModal(true);
+    } finally {
+      setIsSavingToVault(false);
+    }
+  };
+
+  /**
+   * Handle closing all summary related modals after successful save or manual close of result
+   */
+  const handleFinishSaveFlow = () => {
+    setShowSaveResultModal(false);
+    if (saveResult.success) {
+      setShowSummaryResultModal(false);
+      setShowVaultConfirmModal(false);
+    }
+  };
+
  // =============================================================================
  // Helper Functions
  // =============================================================================
@@ -525,9 +670,9 @@ export default function FlowScreen() {
      <View style={styles.emptyIcon}>
        <Feather name="feather" size={48} color={colors.nautical.seafoam} />
      </View>
-      <Text style={styles.emptyTitle}>Chatting with {selectedRole.name}</Text>
+      <Text style={styles.emptyTitle}>Chatting with {selectedRole?.name || 'AI'}</Text>
      <Text style={styles.emptySubtitle}>
-        {selectedRole.description}
+        {selectedRole?.description || 'Loading AI Assistant...'}
      </Text>
    </View>
  );
@@ -585,17 +730,32 @@ export default function FlowScreen() {
              onPress={() => setShowRoleModal(true)}
              activeOpacity={0.7}
            >
+              {selectedRole && (
                <Ionicons
-                name={selectedRole.icon as any}
+                  name={(selectedRole?.icon || 'help-outline') as any}
                  size={16}
                  color={colors.nautical.teal}
                />
+              )}
              <Text style={styles.headerRoleText} numberOfLines={1}>
-                {selectedRole.name}
+                {selectedRole?.name || 'Loading...'}
              </Text>
              <Ionicons name="chevron-down" size={14} color={colors.flow.textSecondary} />
            </TouchableOpacity>

+            {/* Summary Button */}
+            <TouchableOpacity
+              style={[styles.historyButton, { marginRight: spacing.sm }]}
+              onPress={() => setShowSummaryConfirmModal(true)}
+              disabled={messages.length === 0 || isSummarizing}
+            >
+              <Ionicons
+                name="document-text-outline"
+                size={20}
+                color={messages.length === 0 || isSummarizing ? colors.flow.textSecondary : colors.flow.primary}
+              />
+            </TouchableOpacity>
+
            {/* History Button */}
            <TouchableOpacity
              style={styles.historyButton}
@@ -605,6 +765,14 @@ export default function FlowScreen() {
            </TouchableOpacity>
          </View>

+          {/* AI multimodal puppet (optional slot; code in components/puppet) */}
+          <FlowPuppetSlot
+            currentAction={puppetAction}
+            isTalking={isSending}
+            onAction={setPuppetAction}
+            showActionButtons={true}
+          />
+
          {/* Chat Messages */}
          <ScrollView
            ref={scrollViewRef}
@@ -638,21 +806,35 @@ export default function FlowScreen() {

          {/* Bottom Input Bar */}
          <View style={styles.inputBarContainer}>
+            {/* Attached image preview (optional text then send) */}
+            {attachedImage && (
+              <View style={styles.attachedImageRow}>
+                <Image source={{ uri: attachedImage.uri }} style={styles.attachedImageThumb} resizeMode="cover" />
+                <Text style={styles.attachedImageHint} numberOfLines={1}>可输入文字后发送</Text>
+                <TouchableOpacity
+                  style={styles.attachedImageRemove}
+                  onPress={() => setAttachedImage(null)}
+                  hitSlop={{ top: 8, bottom: 8, left: 8, right: 8 }}
+                >
+                  <Ionicons name="close-circle" size={24} color={colors.flow.textSecondary} />
+                </TouchableOpacity>
+              </View>
+            )}
            <View style={styles.inputBar}>
              {/* Image attachment button */}
              <TouchableOpacity
-                style={styles.inputBarButton}
+                style={[styles.inputBarButton, attachedImage && styles.inputBarButtonActive]}
                onPress={handleAddImage}
                activeOpacity={0.7}
              >
-                <Feather name="image" size={22} color={colors.flow.textSecondary} />
+                <Feather name="image" size={22} color={attachedImage ? colors.nautical.teal : colors.flow.textSecondary} />
              </TouchableOpacity>

              {/* Text Input */}
              <View style={styles.inputWrapper}>
                <TextInput
                  style={styles.inputBarText}
-                  placeholder="Message..."
+                  placeholder={attachedImage ? '输入对图片的说明（可选）...' : 'Message...'}
                  placeholderTextColor={colors.flow.textSecondary}
                  value={newContent}
                  onChangeText={setNewContent}
@@ -661,8 +843,8 @@ export default function FlowScreen() {
                />
              </View>

-              {/* Send or Voice button */}
-              {newContent.trim() || isSending ? (
+              {/* Send or Voice button: show send when has text or attached image */}
+              {newContent.trim() || attachedImage || isSending ? (
                <TouchableOpacity
                  style={[styles.sendButton, isSending && styles.sendButtonDisabled]}
                  onPress={handleSendMessage}
@@ -776,34 +958,34 @@ export default function FlowScreen() {
                <Text style={styles.modalTitle}>Choose AI Assistant</Text>

                <ScrollView style={styles.roleList} showsVerticalScrollIndicator={false}>
-                  {AI_CONFIG.ROLES.map((role) => (
+                  {aiRoles.map((role) => (
                    <View key={role.id} style={styles.roleItemContainer}>
                      <View
                        style={[
                          styles.roleItem,
-                          selectedRole.id === role.id && styles.roleItemActive
+                          selectedRole?.id === role.id && styles.roleItemActive
                        ]}
                      >
                        <TouchableOpacity
                          style={styles.roleSelectionArea}
                          onPress={() => {
-                            setSelectedRole(role as any);
+                            setSelectedRole(role);
                            setShowRoleModal(false);
                          }}
                        >
                          <View style={[
                            styles.roleItemIcon,
-                            selectedRole.id === role.id && styles.roleItemIconActive
+                            selectedRole?.id === role.id && styles.roleItemIconActive
                          ]}>
                            <Ionicons
                              name={role.icon as any}
                              size={20}
-                              color={selectedRole.id === role.id ? '#fff' : colors.nautical.teal}
+                              color={selectedRole?.id === role.id ? '#fff' : colors.nautical.teal}
                            />
                          </View>
                          <Text style={[
                            styles.roleItemName,
-                            selectedRole.id === role.id && styles.roleItemNameActive
+                            selectedRole?.id === role.id && styles.roleItemNameActive
                          ]}>
                            {role.name}
                          </Text>
@@ -843,6 +1025,212 @@ export default function FlowScreen() {
          </View>
        </TouchableWithoutFeedback>
      </Modal>
+
+      {/* Summary Confirmation Modal */}
+      <Modal
+        visible={showSummaryConfirmModal}
+        transparent
+        animationType="fade"
+        onRequestClose={() => setShowSummaryConfirmModal(false)}
+      >
+        <TouchableWithoutFeedback onPress={() => setShowSummaryConfirmModal(false)}>
+          <View style={styles.modalOverlay}>
+            <TouchableWithoutFeedback onPress={e => e.stopPropagation()}>
+              <View style={[styles.modalContent, { paddingBottom: spacing.xl }]}>
+                <View style={styles.modalHandle} />
+                <Text style={styles.modalTitle}>Generate Summary</Text>
+                <Text style={[styles.modalSubtitle, { marginVertical: spacing.base }]}>
+                  Would you like to generate a summary for the current conversation?
+                </Text>
+
+                <View style={styles.modalActions}>
+                  <TouchableOpacity
+                    style={[styles.actionButton, styles.cancelButton]}
+                    onPress={() => setShowSummaryConfirmModal(false)}
+                  >
+                    <Text style={styles.cancelButtonText}>No</Text>
+                  </TouchableOpacity>
+                  <TouchableOpacity
+                    style={[styles.actionButton, styles.confirmButton]}
+                    onPress={handleGenerateSummary}
+                  >
+                    <LinearGradient
+                      colors={[colors.nautical.teal, colors.nautical.seafoam]}
+                      style={styles.actionButtonGradient}
+                    >
+                      <Text style={styles.confirmButtonText}>Yes, Generate</Text>
+                    </LinearGradient>
+                  </TouchableOpacity>
+                </View>
+              </View>
+            </TouchableWithoutFeedback>
+          </View>
+        </TouchableWithoutFeedback>
+      </Modal>
+
+      {/* Summary Result Modal */}
+      <Modal
+        visible={showSummaryResultModal}
+        transparent
+        animationType="slide"
+        onRequestClose={() => setShowSummaryResultModal(false)}
+      >
+        <TouchableWithoutFeedback onPress={() => setShowSummaryResultModal(false)}>
+          <View style={styles.modalOverlay}>
+            <TouchableWithoutFeedback onPress={e => e.stopPropagation()}>
+              <View style={[styles.modalContent, { maxHeight: '70%' }]}>
+                <View style={styles.modalHandle} />
+                <View style={styles.modalHeader}>
+                  <Text style={styles.modalTitle}>Conversation Summary</Text>
+                  <TouchableOpacity onPress={() => setShowSummaryResultModal(false)}>
+                    <Ionicons name="close" size={24} color={colors.flow.textSecondary} />
+                  </TouchableOpacity>
+                </View>
+
+                <ScrollView style={styles.summaryContainer} showsVerticalScrollIndicator={false}>
+                  <View style={styles.summaryCard}>
+                    <Text style={styles.summaryText}>{generatedSummary}</Text>
+                  </View>
+                </ScrollView>
+
+                <View style={styles.summaryActions}>
+                  <TouchableOpacity
+                    style={[styles.actionButton, styles.saveToVaultButton]}
+                    onPress={() => setShowVaultConfirmModal(true)}
+                    disabled={isSavingToVault}
+                  >
+                    <LinearGradient
+                      colors={[colors.nautical.teal, colors.nautical.seafoam]}
+                      style={styles.actionButtonGradient}
+                    >
+                      {isSavingToVault ? (
+                        <ActivityIndicator size="small" color="#fff" />
+                      ) : (
+                        <>
+                          <Ionicons name="shield-checkmark-outline" size={20} color="#fff" />
+                          <Text style={styles.confirmButtonText}>Save to Vault</Text>
+                        </>
+                      )}
+                    </LinearGradient>
+                  </TouchableOpacity>
+
+                  <TouchableOpacity
+                    style={styles.closeButton}
+                    onPress={() => setShowSummaryResultModal(false)}
+                  >
+                    <Text style={styles.closeButtonText}>Done</Text>
+                  </TouchableOpacity>
+                </View>
+              </View>
+            </TouchableWithoutFeedback>
+          </View>
+        </TouchableWithoutFeedback>
+      </Modal>
+
+      {/* Save to Vault Confirmation Modal */}
+      <Modal
+        visible={showVaultConfirmModal}
+        transparent
+        animationType="fade"
+        onRequestClose={() => setShowVaultConfirmModal(false)}
+      >
+        <TouchableWithoutFeedback onPress={() => setShowVaultConfirmModal(false)}>
+          <View style={styles.modalOverlay}>
+            <TouchableWithoutFeedback onPress={e => e.stopPropagation()}>
+              <View style={[styles.modalContent, { paddingBottom: spacing.xl }]}>
+                <View style={styles.modalHandle} />
+                <Text style={styles.modalTitle}>Save to Vault</Text>
+                <Text style={[styles.modalSubtitle, { marginVertical: spacing.base }]}>
+                  Would you like to securely save this summary to your digital vault?
+                </Text>
+
+                <View style={styles.modalActions}>
+                  <TouchableOpacity
+                    style={[styles.actionButton, styles.cancelButton]}
+                    onPress={() => setShowVaultConfirmModal(false)}
+                  >
+                    <Text style={styles.cancelButtonText}>Cancel</Text>
+                  </TouchableOpacity>
+                  <TouchableOpacity
+                    style={[styles.actionButton, styles.confirmButton]}
+                    onPress={handleSaveToVault}
+                  >
+                    <LinearGradient
+                      colors={[colors.nautical.teal, colors.nautical.seafoam]}
+                      style={styles.actionButtonGradient}
+                    >
+                      <Text style={styles.confirmButtonText}>Yes, Save</Text>
+                    </LinearGradient>
+                  </TouchableOpacity>
+                </View>
+              </View>
+            </TouchableWithoutFeedback>
+          </View>
+        </TouchableWithoutFeedback>
+      </Modal>
+
+      {/* Save Result Modal */}
+      <Modal
+        visible={showSaveResultModal}
+        transparent
+        animationType="fade"
+        onRequestClose={handleFinishSaveFlow}
+      >
+        <TouchableWithoutFeedback onPress={handleFinishSaveFlow}>
+          <View style={styles.modalOverlay}>
+            <TouchableWithoutFeedback onPress={e => e.stopPropagation()}>
+              <View style={[styles.modalContent, { paddingBottom: spacing.xl, alignItems: 'center' }]}>
+                <View style={styles.modalHandle} />
+
+                <View style={[
+                  styles.resultIconContainer,
+                  saveResult.success ? styles.successIconBg : styles.errorIconBg
+                ]}>
+                  <Ionicons
+                    name={saveResult.success ? "checkmark-circle" : "alert-circle"}
+                    size={64}
+                    color={saveResult.success ? colors.nautical.teal : colors.nautical.coral}
+                  />
+                </View>
+
+                <Text style={styles.modalTitle}>
+                  {saveResult.success ? 'Success!' : 'Oops!'}
+                </Text>
+
+                <Text style={[styles.modalSubtitle, { marginVertical: spacing.base, textAlign: 'center' }]}>
+                  {saveResult.message}
+                </Text>
+
+                <TouchableOpacity
+                  style={[styles.actionButton, styles.confirmButton, { width: '100%' }]}
+                  onPress={handleFinishSaveFlow}
+                >
+                  <LinearGradient
+                    colors={[colors.nautical.teal, colors.nautical.seafoam]}
+                    style={styles.actionButtonGradient}
+                  >
+                    <Text style={styles.confirmButtonText}>Confirm</Text>
+                  </LinearGradient>
+                </TouchableOpacity>
+              </View>
+            </TouchableWithoutFeedback>
+          </View>
+        </TouchableWithoutFeedback>
+      </Modal>
+
+      {/* Summary Loading Modal */}
+      <Modal
+        visible={isSummarizing}
+        transparent
+        animationType="fade"
+      >
+        <View style={styles.loadingOverlay}>
+          <View style={styles.loadingContainer}>
+            <ActivityIndicator size="large" color={colors.nautical.teal} />
+            <Text style={styles.loadingText}>Generating Summary...</Text>
+          </View>
+        </View>
+      </Modal>
    </View>
  );
 }
@@ -1129,6 +1517,33 @@ const styles = StyleSheet.create({
    paddingTop: spacing.sm,
    backgroundColor: 'transparent',
  },
+  attachedImageRow: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    backgroundColor: colors.flow.cardBackground,
+    borderRadius: borderRadius.lg,
+    padding: spacing.sm,
+    marginBottom: spacing.sm,
+    borderWidth: 1,
+    borderColor: colors.flow.cardBorder,
+    gap: spacing.sm,
+  },
+  attachedImageThumb: {
+    width: 48,
+    height: 48,
+    borderRadius: borderRadius.md,
+  },
+  attachedImageHint: {
+    flex: 1,
+    fontSize: typography.fontSize.sm,
+    color: colors.flow.textSecondary,
+  },
+  attachedImageRemove: {
+    padding: spacing.xs,
+  },
+  inputBarButtonActive: {
+    backgroundColor: colors.nautical.paleAqua,
+  },
  inputBar: {
    flexDirection: 'row',
    alignItems: 'flex-end',
@@ -1281,4 +1696,101 @@ const styles = StyleSheet.create({
    color: colors.flow.textSecondary,
    fontWeight: '600',
  },
+
+  // Summary Modal styles
+  modalSubtitle: {
+    fontSize: typography.fontSize.base,
+    color: colors.flow.textSecondary,
+    lineHeight: 22,
+  },
+  modalActions: {
+    flexDirection: 'row',
+    gap: spacing.md,
+    marginTop: spacing.base,
+  },
+  actionButton: {
+    flex: 1,
+    height: 50,
+    borderRadius: borderRadius.lg,
+    justifyContent: 'center',
+    alignItems: 'center',
+    overflow: 'hidden',
+  },
+  actionButtonGradient: {
+    width: '100%',
+    height: '100%',
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  cancelButton: {
+    backgroundColor: colors.nautical.paleAqua,
+  },
+  confirmButton: {
+    // Gradient handled in child
+  },
+  cancelButtonText: {
+    fontSize: typography.fontSize.base,
+    fontWeight: '600',
+    color: colors.flow.textSecondary,
+  },
+  confirmButtonText: {
+    fontSize: typography.fontSize.base,
+    fontWeight: '600',
+    color: '#fff',
+  },
+  summaryContainer: {
+    marginVertical: spacing.md,
+  },
+  summaryCard: {
+    backgroundColor: colors.nautical.paleAqua + '40', // 25% opacity
+    padding: spacing.md,
+    borderRadius: borderRadius.lg,
+    borderWidth: 1,
+    borderColor: colors.nautical.lightMint,
+  },
+  summaryText: {
+    fontSize: typography.fontSize.base,
+    color: colors.flow.text,
+    lineHeight: 24,
+  },
+  summaryActions: {
+    marginTop: spacing.md,
+    gap: spacing.sm,
+  },
+  saveToVaultButton: {
+    height: 54,
+  },
+  resultIconContainer: {
+    width: 80,
+    height: 80,
+    borderRadius: 40,
+    justifyContent: 'center',
+    alignItems: 'center',
+    marginBottom: spacing.md,
+  },
+  successIconBg: {
+    backgroundColor: colors.nautical.paleAqua,
+  },
+  errorIconBg: {
+    backgroundColor: 'rgba(231, 76, 60, 0.1)', // coral at 10%
+  },
+  loadingOverlay: {
+    flex: 1,
+    backgroundColor: 'rgba(26, 58, 74, 0.6)',
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  loadingContainer: {
+    backgroundColor: colors.flow.cardBackground,
+    padding: spacing.xl,
+    borderRadius: borderRadius.xl,
+    alignItems: 'center',
+    ...shadows.soft,
+    gap: spacing.md,
+  },
+  loadingText: {
+    fontSize: typography.fontSize.base,
+    color: colors.flow.text,
+    fontWeight: '600',
+  },
 });
--- a/src/screens/MeScreen.tsx
+++ b/src/screens/MeScreen.tsx
@@ -315,6 +315,7 @@ export default function MeScreen() {
      await AsyncStorage.multiRemove([
        vaultKeys.INITIALIZED,
        vaultKeys.SHARE_DEVICE,
+        vaultKeys.MNEMONIC_PART_LOCAL,
      ]);
      setResetVaultFeedback({
        status: 'success',
--- a/src/screens/VaultScreen.tsx
+++ b/src/screens/VaultScreen.tsx
@@ -25,8 +25,10 @@ import { VaultAsset, VaultAssetType, Heir } from '../types';
 import BiometricModal from '../components/common/BiometricModal';
 import { useAuth } from '../context/AuthContext';
 import { useVaultAssets } from '../hooks/useVaultAssets';
-import { getVaultStorageKeys } from '../config';
+import { getVaultStorageKeys, DEBUG_MODE } from '../config';
 import { mnemonicToEntropy, splitSecret, serializeShare } from '../utils/sss';
+import { storageService } from '../services/storage.service';
+import { SentinelVault } from '@/utils/crypto_core';

 // Asset type configuration with nautical theme
 const assetTypeConfig: Record<VaultAssetType, { icon: string; iconType: 'ionicons' | 'feather' | 'material' | 'fontawesome5'; label: string }> = {
@@ -91,41 +93,6 @@ type HeirAssignment = {
  heir: Heir;
 };

-// Mock data
-// const initialAssets: VaultAsset[] = [
-//   {
-//     id: '1',
-//     type: 'private_key',
-//     label: 'ETH Main Wallet Key',
-//     createdAt: new Date('2024-01-10'),
-//     updatedAt: new Date('2024-01-10'),
-//     isEncrypted: true,
-//   },
-//   {
-//     id: '2',
-//     type: 'game_account',
-//     label: 'Steam Account Credentials',
-//     createdAt: new Date('2024-01-08'),
-//     updatedAt: new Date('2024-01-08'),
-//     isEncrypted: true,
-//   },
-//   {
-//     id: '3',
-//     type: 'document',
-//     label: 'Insurance Policy Scan',
-//     createdAt: new Date('2024-01-05'),
-//     updatedAt: new Date('2024-01-05'),
-//     isEncrypted: true,
-//   },
-//   {
-//     id: '4',
-//     type: 'will',
-//     label: 'Testament Draft v2',
-//     createdAt: new Date('2024-01-02'),
-//     updatedAt: new Date('2024-01-15'),
-//     isEncrypted: true,
-//   },
-// ];

 const renderAssetTypeIcon = (config: typeof assetTypeConfig[VaultAssetType], size: number, color: string) => {
  switch (config.iconType) {
@@ -148,11 +115,15 @@ export default function VaultScreen() {
    setAssets,
    refreshAssets,
    createAsset: createVaultAsset,
+    deleteAsset: deleteVaultAsset,
+    assignAsset: assignVaultAsset,
    isSealing,
    createError: addError,
    clearCreateError: clearAddError,
  } = useVaultAssets(isUnlocked);
  const [showAddModal, setShowAddModal] = useState(false);
+  const [showDeleteConfirm, setShowDeleteConfirm] = useState(false);
+  const [isDeleting, setIsDeleting] = useState(false);
  const [selectedType, setSelectedType] = useState<VaultAssetType>('custom');
  const [newLabel, setNewLabel] = useState('');
  const [showUploadSuccess, setShowUploadSuccess] = useState(false);
@@ -169,8 +140,15 @@ export default function VaultScreen() {
  const [showAddBiometric, setShowAddBiometric] = useState(false);
  const [accountProvider, setAccountProvider] = useState<'bank' | 'steam' | 'facebook' | 'custom'>('bank');
  const [showMnemonic, setShowMnemonic] = useState(false);
+  const [showAssignModal, setShowAssignModal] = useState(false);
+  const [showAssignErrorModal, setShowAssignErrorModal] = useState(false);
+  const [assignErrorMessage, setAssignErrorMessage] = useState('');
+  const [isAssigning, setIsAssigning] = useState(false);
+  const [heirEmail, setHeirEmail] = useState('');
  const [showLegacyAssignCta, setShowLegacyAssignCta] = useState(false);
  const [hasS0, setHasS0] = useState<boolean | null>(null);
+  const [backupContent, setBackupContent] = useState<string | null>(null);
+  const [isFetchingBackup, setIsFetchingBackup] = useState(false);
  const [mnemonicWords, setMnemonicWords] = useState<string[]>([]);
  const [mnemonicParts, setMnemonicParts] = useState<string[][]>([]);
  const [mnemonicStep, setMnemonicStep] = useState<1 | 2 | 3 | 4 | 5>(1);
@@ -210,7 +188,7 @@ export default function VaultScreen() {
      return;
    }
    if (isUnlocked) return;
-    const timer = setTimeout(() => setShowBiometric(true), 500);
+    const timer = setTimeout(() => setShowBiometric(true), 100);
    return () => clearTimeout(timer);
  }, [isUnlocked, hasS0]);

@@ -218,7 +196,7 @@ export default function VaultScreen() {
    if (isUnlocked) {
      Animated.timing(fadeAnim, {
        toValue: 1,
-        duration: 600,
+        duration: 200,
        useNativeDriver: true,
      }).start();
    }
@@ -230,12 +208,12 @@ export default function VaultScreen() {
        Animated.sequence([
          Animated.timing(pulseAnim, {
            toValue: 1.05,
-            duration: 1500,
+            duration: 500,
            useNativeDriver: true,
          }),
          Animated.timing(pulseAnim, {
            toValue: 1,
-            duration: 1500,
+            duration: 500,
            useNativeDriver: true,
          }),
        ])
@@ -258,7 +236,7 @@ export default function VaultScreen() {
    setProgressIndex(0);
    progressAnim.setValue(0);
    setTimeout(() => setShowMnemonic(true), 200);
-    AsyncStorage.setItem('sentinel_mnemonic_part_local', parts[0].join(' ')).catch(() => {
+    AsyncStorage.setItem(vaultKeys.MNEMONIC_PART_LOCAL, parts[0].join(' ')).catch(() => {
      // Best-effort local store; UI remains available
    });
  };
@@ -380,9 +358,19 @@ export default function VaultScreen() {
      const entropy = mnemonicToEntropy(mnemonicWords, wordList);
      const shares = splitSecret(entropy);
      const s0 = shares[0]; // device share (S0)
+      const s1 = shares[1]; // server share (S1)
+      const s2 = shares[2]; // heir share (S2)
      // S0 is stored in AsyncStorage under user-scoped key — app-level storage, not hardware TEE/SE
+      const vault = new SentinelVault()
+
+      const aes_key = await vault.deriveKey(mnemonicWords.join(' '))
+
      await AsyncStorage.setItem(vaultKeys.SHARE_DEVICE, serializeShare(s0));
+      await AsyncStorage.setItem(vaultKeys.SHARE_SERVER, serializeShare(s1));
      await AsyncStorage.setItem(vaultKeys.INITIALIZED, '1');
+      await AsyncStorage.setItem(vaultKeys.AES_KEY, aes_key.toString('hex'));
+      await AsyncStorage.setItem(vaultKeys.SHARE_HEIR, serializeShare(s2));
+
      setHasS0(true);
      setShowMnemonic(false);
      setShowBiometric(true);
@@ -486,6 +474,10 @@ export default function VaultScreen() {
    setSelectedAsset(asset);
    setShowDetail(true);
    setShowKeyPreview(false);
+
+    if (DEBUG_MODE) {
+      console.log('[DEBUG] Vault Asset Details:', JSON.stringify(asset.rawData, null, 2));
+    }
  };

  const handleCloseDetail = () => {
@@ -493,6 +485,93 @@ export default function VaultScreen() {
    setSelectedAsset(null);
    setShowKeyPreview(false);
    setShowGuardedBiometric(false);
+    setBackupContent(null);
+  };
+
+  const handleFetchBackup = async () => {
+    if (!selectedAsset || !user?.id) return;
+
+    setIsFetchingBackup(true);
+    try {
+      const content = await storageService.getAssetBackup(Number(selectedAsset.id), user.id);
+      if (content) {
+        setBackupContent(content);
+      } else {
+        if (typeof Alert !== 'undefined' && Alert.alert) {
+          Alert.alert('No Backup Found', 'No local plaintext backup found for this treasure.');
+        }
+      }
+    } catch (error) {
+      console.error('Fetch backup error:', error);
+      if (typeof Alert !== 'undefined' && Alert.alert) {
+        Alert.alert('Error', 'Failed to retrieve local backup.');
+      }
+    } finally {
+      setIsFetchingBackup(false);
+    }
+  };
+
+  const handleDeleteAsset = async () => {
+    if (!selectedAsset || isDeleting) return;
+
+    setIsDeleting(true);
+    try {
+      const result = await deleteVaultAsset(Number(selectedAsset.id));
+      if (result.success) {
+        setShowDeleteConfirm(false);
+        handleCloseDetail();
+        if (typeof Alert !== 'undefined' && Alert.alert) {
+          Alert.alert('Success', 'Treasure removed from the vault.');
+        }
+      } else if (result.isUnauthorized) {
+        setShowDeleteConfirm(false);
+        handleCloseDetail();
+        if (typeof Alert !== 'undefined' && Alert.alert) {
+          Alert.alert('Unauthorized', 'Your session has expired. Please sign in again.');
+        }
+      } else if (result.error && typeof Alert !== 'undefined' && Alert.alert) {
+        Alert.alert('Failed', result.error);
+      }
+    } catch (error) {
+      console.error('Delete error:', error);
+      if (typeof Alert !== 'undefined' && Alert.alert) {
+        Alert.alert('Error', 'An unexpected error occurred during deletion.');
+      }
+    } finally {
+      setIsDeleting(false);
+    }
+  };
+
+  const handleAssignHeir = async () => {
+    if (!selectedAsset || isAssigning) return;
+    if (!heirEmail.trim() || !heirEmail.includes('@')) {
+      Alert.alert('Invalid Email', 'Please enter a valid email address.');
+      return;
+    }
+
+    setIsAssigning(true);
+    try {
+      const result = await assignVaultAsset(Number(selectedAsset.id), heirEmail.trim());
+      if (result.success) {
+        setShowAssignModal(false);
+        setHeirEmail('');
+        Alert.alert('Success', `Asset assigned to ${heirEmail.trim()}`);
+      } else if (result.isUnauthorized) {
+        setShowAssignModal(false);
+        if (typeof Alert !== 'undefined' && Alert.alert) {
+          Alert.alert('Unauthorized', 'Your session has expired. Please sign in again.');
+        }
+      } else if (result.error) {
+        setAssignErrorMessage(result.error);
+        setShowAssignErrorModal(true);
+      }
+    } catch (error) {
+      console.error('Assign error:', error);
+      setAssignErrorMessage('An unexpected error occurred during assignment.');
+      setShowAssignErrorModal(true);
+    } finally {
+      setIsAssigning(false);
+    }
  };

  const handleGuardedAccess = () => {
@@ -502,6 +581,7 @@ export default function VaultScreen() {
  const handleGuardedSuccess = () => {
    setShowGuardedBiometric(false);
    setShowKeyPreview(true);
+    handleFetchBackup();
  };

  const handleAddVerification = () => {
@@ -1437,6 +1517,12 @@ export default function VaultScreen() {
                    <Text style={styles.metaLabel}>{detailMetaLabel}</Text>
                    <Text style={styles.metaValue}>{detailMetaValue}</Text>
                  </View>
+                  {selectedAsset?.heirEmail ? (
+                    <View style={[styles.metaCard, { width: '100%' }]}>
+                      <Text style={styles.metaLabel}>ASSIGNED HEIR</Text>
+                      <Text style={styles.metaValue}>{selectedAsset.heirEmail}</Text>
+                    </View>
+                  ) : null}
                </View>

                <View style={styles.actionGroup}>
@@ -1449,10 +1535,30 @@ export default function VaultScreen() {
                    <MaterialCommunityIcons name="file-lock" size={18} color={colors.vault.primary} />
                    <Text style={styles.actionText}>Export Cipher Pack</Text>
                  </TouchableOpacity>
-                  <TouchableOpacity style={styles.actionRow} activeOpacity={0.8}>
-                    <MaterialCommunityIcons name="refresh" size={18} color={colors.vault.primary} />
+                  <TouchableOpacity style={styles.actionRow} activeOpacity={0.7}>
+                    <Ionicons name="notifications-outline" size={18} color={colors.vault.text} />
                    <Text style={styles.actionText}>Reset Sentinel Timer</Text>
                  </TouchableOpacity>
+
+                  <TouchableOpacity
+                    style={[styles.actionRow, styles.assignActionRow]}
+                    onPress={() => setShowAssignModal(true)}
+                    activeOpacity={0.7}
+                  >
+                    <Ionicons name="person-add-outline" size={18} color={colors.vault.text} />
+                    <Text style={styles.actionText}>
+                      {selectedAsset?.heirEmail ? 'Change Heir' : 'Assign Heir'}
+                    </Text>
+                  </TouchableOpacity>
+
+                  <TouchableOpacity
+                    style={[styles.actionRow, styles.deleteActionRow]}
+                    onPress={() => setShowDeleteConfirm(true)}
+                    activeOpacity={0.7}
+                  >
+                    <Feather name="trash-2" size={18} color={colors.vault.warning} />
+                    <Text style={[styles.actionText, styles.deleteActionText]}>Delete Treasure</Text>
+                  </TouchableOpacity>
                </View>

                <View style={styles.guardCard}>
@@ -1463,6 +1569,7 @@ export default function VaultScreen() {
                  <Text style={styles.guardText}>
                    Plaintext access requires biometric verification and a memory rehearsal step.
                  </Text>
+
                  <TouchableOpacity
                    style={styles.guardButton}
                    onPress={handleGuardedAccess}
@@ -1470,10 +1577,13 @@ export default function VaultScreen() {
                  >
                    <Text style={styles.guardButtonText}>Begin Verification</Text>
                  </TouchableOpacity>
+
                  {showKeyPreview && (
                    <View style={styles.previewCard}>
-                      <Text style={styles.previewLabel}>MNEMONIC SHARD (MASKED)</Text>
-                      <Text style={styles.previewValue}>ocean-anchored-ember-veil</Text>
+                      <Text style={styles.previewLabel}>LOCAL PLAINTEXT BACKUP</Text>
+                      <Text style={styles.previewValue}>
+                        {isFetchingBackup ? 'Fetching content...' : (backupContent || 'No local backup found for this treasure')}
+                      </Text>
                    </View>
                  )}
                </View>
@@ -1498,6 +1608,155 @@ export default function VaultScreen() {
          isDark
        />
      </Modal>
+
+      {/* Delete Confirmation Modal */}
+      <Modal
+        visible={showDeleteConfirm}
+        animationType="fade"
+        transparent
+        onRequestClose={() => setShowDeleteConfirm(false)}
+      >
+        <View style={styles.modalOverlay}>
+          <TouchableOpacity
+            style={styles.modalOverlayDismiss}
+            activeOpacity={1}
+            onPress={() => setShowDeleteConfirm(false)}
+          />
+          <View style={styles.deleteConfirmContent}>
+            <View style={styles.deleteIconContainer}>
+              <Feather name="alert-triangle" size={32} color={colors.vault.warning} />
+            </View>
+            <Text style={styles.deleteTitle}>Remove Treasure?</Text>
+            <Text style={styles.deleteMessage}>
+              This action cannot be undone. The treasure will be permanently shredded from the deep vault.
+            </Text>
+            <View style={styles.deleteButtons}>
+              <TouchableOpacity
+                style={styles.deleteCancelButton}
+                onPress={() => setShowDeleteConfirm(false)}
+                disabled={isDeleting}
+              >
+                <Text style={styles.deleteCancelText}>Cancel</Text>
+              </TouchableOpacity>
+              <TouchableOpacity
+                style={styles.deleteConfirmButton}
+                onPress={handleDeleteAsset}
+                disabled={isDeleting}
+              >
+                {isDeleting ? (
+                  <Text style={styles.deleteConfirmText}>Shredding...</Text>
+                ) : (
+                  <Text style={styles.deleteConfirmText}>Confirm Delete</Text>
+                )}
+              </TouchableOpacity>
+            </View>
+          </View>
+        </View>
+      </Modal>
+
+      {/* Assign Heir Modal */}
+      <Modal
+        visible={showAssignModal}
+        animationType="slide"
+        transparent
+        onRequestClose={() => setShowAssignModal(false)}
+      >
+        <View style={styles.modalOverlay}>
+          <TouchableOpacity
+            style={styles.modalOverlayDismiss}
+            activeOpacity={1}
+            onPress={() => setShowAssignModal(false)}
+          />
+          <KeyboardAvoidingView
+            behavior={Platform.OS === 'ios' ? 'padding' : 'height'}
+            style={styles.assignModalContainer}
+          >
+            <View style={styles.assignModalContent}>
+              <View style={styles.assignModalHeader}>
+                <View style={styles.assignIconGlow}>
+                  <Ionicons name="person-add" size={32} color={colors.vault.primary} />
+                </View>
+                <Text style={styles.assignTitle}>Designate Heir</Text>
+                <Text style={styles.assignSubtitle}>
+                  Enter the email address of the person who should inherit this treasure.
+                </Text>
+              </View>
+
+              <View style={styles.assignInputContainer}>
+                <Text style={styles.inputLabel}>HEIR EMAIL ADDRESS</Text>
+                <TextInput
+                  style={styles.assignInput}
+                  value={heirEmail}
+                  onChangeText={setHeirEmail}
+                  placeholder="name@example.com"
+                  placeholderTextColor={colors.vault.textSecondary}
+                  keyboardType="email-address"
+                  autoCapitalize="none"
+                  autoCorrect={false}
+                />
+              </View>
+
+              <View style={styles.assignButtons}>
+                <TouchableOpacity
+                  style={styles.assignCancelButton}
+                  onPress={() => {
+                    setShowAssignModal(false);
+                    setHeirEmail('');
+                  }}
+                  disabled={isAssigning}
+                >
+                  <Text style={styles.assignCancelText}>Cancel</Text>
+                </TouchableOpacity>
+                <TouchableOpacity
+                  style={styles.assignConfirmButton}
+                  onPress={handleAssignHeir}
+                  disabled={isAssigning || !heirEmail.trim()}
+                >
+                  <LinearGradient
+                    colors={[colors.vault.primary, colors.vault.secondary]}
+                    style={styles.assignConfirmGradient}
+                  >
+                    {isAssigning ? (
+                      <Text style={styles.assignConfirmText}>Assigning...</Text>
+                    ) : (
+                      <Text style={styles.assignConfirmText}>Confirm Heir</Text>
+                    )}
+                  </LinearGradient>
+                </TouchableOpacity>
+              </View>
+            </View>
+          </KeyboardAvoidingView>
+        </View>
+      </Modal>
+
+      {/* Assign Heir Error Modal */}
+      <Modal
+        visible={showAssignErrorModal}
+        animationType="fade"
+        transparent
+        onRequestClose={() => setShowAssignErrorModal(false)}
+      >
+        <View style={styles.modalOverlay}>
+          <TouchableOpacity
+            style={styles.modalOverlayDismiss}
+            activeOpacity={1}
+            onPress={() => setShowAssignErrorModal(false)}
+          />
+          <View style={styles.errorModalContent}>
+            <View style={styles.errorIconContainer}>
+              <MaterialCommunityIcons name="alert-circle-outline" size={32} color={colors.vault.warning} />
+            </View>
+            <Text style={styles.errorTitle}>Assignment Failed</Text>
+            <Text style={styles.errorMessage}>{assignErrorMessage}</Text>
+            <TouchableOpacity
+              style={styles.errorCloseButton}
+              onPress={() => setShowAssignErrorModal(false)}
+            >
+              <Text style={styles.errorCloseButtonText}>Dismiss</Text>
+            </TouchableOpacity>
+          </View>
+        </View>
+      </Modal>
    </View>
  );

@@ -1766,6 +2025,73 @@ const styles = StyleSheet.create({
    backgroundColor: 'rgba(26, 58, 74, 0.8)',
    justifyContent: 'flex-end',
  },
+  modalOverlayDismiss: {
+    ...StyleSheet.absoluteFillObject,
+  },
+  deleteConfirmContent: {
+    backgroundColor: colors.vault.cardBackground,
+    marginHorizontal: spacing.lg,
+    borderRadius: borderRadius.xl,
+    padding: spacing.xl,
+    borderWidth: 1,
+    borderColor: colors.vault.cardBorder,
+    alignItems: 'center',
+    marginBottom: spacing.xxl + spacing.lg,
+  },
+  deleteIconContainer: {
+    width: 64,
+    height: 64,
+    borderRadius: 32,
+    backgroundColor: `${colors.vault.warning}20`,
+    alignItems: 'center',
+    justifyContent: 'center',
+    marginBottom: spacing.lg,
+  },
+  deleteTitle: {
+    fontSize: typography.fontSize.lg,
+    color: colors.vault.text,
+    fontWeight: '700',
+    marginBottom: spacing.sm,
+    fontFamily: typography.fontFamily.serif,
+  },
+  deleteMessage: {
+    fontSize: typography.fontSize.sm,
+    color: colors.vault.textSecondary,
+    textAlign: 'center',
+    lineHeight: typography.fontSize.sm * 1.5,
+    marginBottom: spacing.xl,
+  },
+  deleteButtons: {
+    flexDirection: 'row',
+    gap: spacing.md,
+    width: '100%',
+  },
+  deleteCancelButton: {
+    flex: 1,
+    paddingVertical: spacing.md,
+    borderRadius: borderRadius.lg,
+    backgroundColor: 'rgba(255, 255, 255, 0.08)',
+    alignItems: 'center',
+    borderWidth: 1,
+    borderColor: 'rgba(255, 255, 255, 0.1)',
+  },
+  deleteCancelText: {
+    color: colors.vault.textSecondary,
+    fontSize: typography.fontSize.base,
+    fontWeight: '600',
+  },
+  deleteConfirmButton: {
+    flex: 2,
+    paddingVertical: spacing.md,
+    borderRadius: borderRadius.lg,
+    backgroundColor: colors.vault.warning,
+    alignItems: 'center',
+  },
+  deleteConfirmText: {
+    color: colors.vault.text,
+    fontSize: typography.fontSize.base,
+    fontWeight: '700',
+  },
  modalContent: {
    backgroundColor: colors.nautical.cream,
    borderTopLeftRadius: borderRadius.xxl,
@@ -2570,8 +2896,204 @@ const styles = StyleSheet.create({
    borderColor: colors.sentinel.cardBorder,
  },
  mnemonicSecondaryText: {
-    color: colors.sentinel.text,
    fontWeight: '700',
    letterSpacing: typography.letterSpacing.wide,
  },
+  deleteActionRow: {
+    backgroundColor: 'rgba(229, 115, 115, 0.08)',
+    borderColor: 'rgba(229, 115, 115, 0.2)',
+    marginTop: spacing.sm,
+  },
+  deleteActionText: {
+    color: colors.vault.warning,
+  },
+  confirmModalOverlay: {
+    flex: 1,
+    backgroundColor: 'rgba(11, 20, 24, 0.85)',
+    justifyContent: 'center',
+    alignItems: 'center',
+    padding: spacing.xl,
+  },
+  confirmModalContent: {
+    width: '100%',
+    backgroundColor: colors.vault.cardBackground,
+    borderRadius: borderRadius.xl,
+    padding: spacing.lg,
+    borderWidth: 1,
+    borderColor: colors.vault.cardBorder,
+    gap: spacing.md,
+  },
+  confirmModalTitle: {
+    fontSize: typography.fontSize.lg,
+    color: colors.vault.text,
+    fontWeight: '700',
+    textAlign: 'center',
+  },
+  confirmModalText: {
+    fontSize: typography.fontSize.base,
+    color: colors.vault.textSecondary,
+    textAlign: 'center',
+    lineHeight: 22,
+  },
+  confirmModalButtons: {
+    flexDirection: 'row',
+    gap: spacing.md,
+    marginTop: spacing.sm,
+  },
+  confirmModalButton: {
+    flex: 1,
+    paddingVertical: spacing.md,
+    borderRadius: borderRadius.lg,
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  confirmCancelButton: {
+    backgroundColor: 'rgba(255, 255, 255, 0.05)',
+    borderWidth: 1,
+    borderColor: 'rgba(255, 255, 255, 0.1)',
+  },
+  confirmDeleteButton: {
+    backgroundColor: colors.vault.warning,
+  },
+  confirmCancelText: {
+    color: colors.vault.textSecondary,
+  },
+  assignActionRow: {
+    // Optional specific styling
+  },
+  assignModalContainer: {
+    backgroundColor: colors.vault.cardBackground,
+    marginHorizontal: spacing.lg,
+    borderRadius: borderRadius.xl,
+    borderWidth: 1,
+    borderColor: colors.vault.cardBorder,
+    overflow: 'hidden',
+    marginBottom: spacing.xxl,
+  },
+  assignModalContent: {
+    padding: spacing.xl,
+  },
+  assignModalHeader: {
+    alignItems: 'center',
+    marginBottom: spacing.xl,
+  },
+  assignIconGlow: {
+    width: 64,
+    height: 64,
+    borderRadius: 32,
+    backgroundColor: `${colors.vault.primary}15`,
+    alignItems: 'center',
+    justifyContent: 'center',
+    marginBottom: spacing.md,
+  },
+  assignTitle: {
+    fontSize: typography.fontSize.lg,
+    color: colors.vault.text,
+    fontWeight: '700',
+    marginBottom: spacing.xs,
+    fontFamily: typography.fontFamily.serif,
+  },
+  assignSubtitle: {
+    fontSize: typography.fontSize.sm,
+    color: colors.vault.textSecondary,
+    textAlign: 'center',
+    lineHeight: typography.fontSize.sm * 1.5,
+  },
+  assignInputContainer: {
+    marginBottom: spacing.xl,
+  },
+  inputLabel: {
+    fontSize: typography.fontSize.xs,
+    color: colors.vault.textSecondary,
+    fontWeight: '700',
+    letterSpacing: 1,
+    marginBottom: spacing.sm,
+  },
+  assignInput: {
+    backgroundColor: 'rgba(255, 255, 255, 0.05)',
+    borderRadius: borderRadius.lg,
+    padding: spacing.md,
+    fontSize: typography.fontSize.base,
+    color: colors.vault.text,
+    borderWidth: 1,
+    borderColor: 'rgba(255, 255, 255, 0.1)',
+  },
+  assignButtons: {
+    flexDirection: 'row',
+    gap: spacing.md,
+  },
+  assignCancelButton: {
+    flex: 1,
+    paddingVertical: spacing.md,
+    borderRadius: borderRadius.lg,
+    backgroundColor: 'rgba(255, 255, 255, 0.08)',
+    alignItems: 'center',
+    borderWidth: 1,
+    borderColor: 'rgba(255, 255, 255, 0.1)',
+  },
+  assignCancelText: {
+    color: colors.vault.textSecondary,
+    fontSize: typography.fontSize.base,
+    fontWeight: '600',
+  },
+  assignConfirmButton: {
+    flex: 2,
+    borderRadius: borderRadius.lg,
+    overflow: 'hidden',
+  },
+  assignConfirmGradient: {
+    paddingVertical: spacing.md,
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  assignConfirmText: {
+    color: colors.vault.text,
+    fontSize: typography.fontSize.base,
+    fontWeight: '700',
+  },
+  errorModalContent: {
+    backgroundColor: colors.vault.cardBackground,
+    marginHorizontal: spacing.lg,
+    borderRadius: borderRadius.xl,
+    padding: spacing.xl,
+    borderWidth: 1,
+    borderColor: colors.vault.cardBorder,
+    alignItems: 'center',
+    marginBottom: spacing.xxl,
+  },
+  errorIconContainer: {
+    width: 64,
+    height: 64,
+    borderRadius: 32,
+    backgroundColor: `${colors.vault.warning}15`,
+    alignItems: 'center',
+    justifyContent: 'center',
+    marginBottom: spacing.lg,
+  },
+  errorTitle: {
+    fontSize: typography.fontSize.lg,
+    color: colors.vault.text,
+    fontWeight: '700',
+    marginBottom: spacing.sm,
+    fontFamily: typography.fontFamily.serif,
+  },
+  errorMessage: {
+    fontSize: typography.fontSize.sm,
+    color: colors.vault.textSecondary,
+    textAlign: 'center',
+    lineHeight: typography.fontSize.sm * 1.5,
+    marginBottom: spacing.xl,
+  },
+  errorCloseButton: {
+    width: '100%',
+    paddingVertical: spacing.md,
+    borderRadius: borderRadius.lg,
+    backgroundColor: colors.vault.warning,
+    alignItems: 'center',
+  },
+  errorCloseButtonText: {
+    color: colors.vault.text,
+    fontSize: typography.fontSize.base,
+    fontWeight: '700',
+  },
 });
--- a/src/services/ai.service.ts
+++ b/src/services/ai.service.ts
@@ -12,6 +12,8 @@ import {
  getApiHeaders,
  logApiDebug,
 } from '../config';
+import { AIRole } from '../types';
+import { trimInternalMessages } from '../utils/token_utils';

 // =============================================================================
 // Type Definitions
@@ -219,10 +221,13 @@ export const aiService = {
        const errorText = await response.text();
        logApiDebug('AI Image Error Response', errorText);

-        let errorDetail = 'AI image request failed';
+        let errorDetail: string = 'AI image request failed';
        try {
          const errorData = JSON.parse(errorText);
-          errorDetail = errorData.detail || errorDetail;
+          const d = errorData.detail;
+          if (typeof d === 'string') errorDetail = d;
+          else if (Array.isArray(d) && d[0]?.msg) errorDetail = d.map((e: { msg?: string }) => e.msg).join('; ');
+          else if (d && typeof d === 'object') errorDetail = JSON.stringify(d);
        } catch {
          errorDetail = errorText || errorDetail;
        }
@@ -241,4 +246,86 @@ export const aiService = {
      throw error;
    }
  },
+
+  /**
+   * Summarize a chat conversation
+   * @param messages - Array of chat messages
+   * @param token - JWT token for authentication
+   * @returns AI summary text
+   */
+  async summarizeChat(messages: AIMessage[], token?: string): Promise<string> {
+    if (NO_BACKEND_MODE) {
+      logApiDebug('AI Summary', 'Using mock mode');
+      return new Promise((resolve) => {
+        setTimeout(() => {
+          resolve('This is a mock summary of your conversation. You discussed various topics including AI integration and UI design. The main conclusion was to proceed with the proposed implementation plan.');
+        }, AI_CONFIG.MOCK_RESPONSE_DELAY);
+      });
+    }
+
+    // Enforce token limit (10,000 tokens)
+    const trimmedMessages = trimInternalMessages(messages);
+
+    const historicalMessages = trimmedMessages.map(msg => ({
+      role: msg.role,
+      content: msg.content,
+    }));
+
+    const summaryPrompt: AIMessage = {
+      role: 'user',
+      content: 'Please provide a concise summary of the conversation above in English. Focus on the main topics discussed and any key conclusions or actions mentioned.',
+    };
+
+    const response = await this.chat([...historicalMessages, summaryPrompt], token);
+    return response.choices[0]?.message?.content || 'No summary generated';
+  },
+
+  /**
+   * Fetch available AI roles from backend
+   * @param token - Optional JWT token for authentication
+   * @returns Array of AI roles
+   */
+  async getAIRoles(token?: string): Promise<AIRole[]> {
+    if (NO_BACKEND_MODE) {
+      logApiDebug('AI Roles', 'Using mock roles');
+      return [...AI_CONFIG.ROLES];
+    }
+
+    if (!token) {
+      console.warn('[AI Service] getAIRoles called without token, falling back to static roles');
+      return [...AI_CONFIG.ROLES];
+    }
+
+    const url = buildApiUrl(API_ENDPOINTS.AI.GET_ROLES);
+    const headers = getApiHeaders(token);
+
+    logApiDebug('AI Roles Request', {
+      url,
+      hasToken: !!token,
+      headers: {
+        ...headers,
+        Authorization: headers.Authorization ? `${headers.Authorization.substring(0, 15)}...` : 'MISSING'
+      }
+    });
+
+    try {
+      const response = await fetch(url, {
+        method: 'GET',
+        headers,
+      });
+
+      if (!response.ok) {
+        console.error(`[AI Service] Failed to fetch AI roles: ${response.status}. Falling back to static roles.`);
+        return [...AI_CONFIG.ROLES];
+      }
+
+      const data = await response.json();
+      logApiDebug('AI Roles Success', { count: data.length });
+      return data;
+    } catch (error) {
+      console.error('[AI Service] Fetch AI roles error:', error);
+      // Fallback to config roles if API fails for better UX
+      return [...AI_CONFIG.ROLES];
+    }
+  },
 };
--- a/src/services/assets.service.ts
+++ b/src/services/assets.service.ts
@@ -23,6 +23,7 @@ export interface Asset {
  author_id: number;
  private_key_shard: string;
  content_outer_encrypted: string;
+  heir_email?: string;
 }

 export interface AssetCreate {
@@ -45,7 +46,7 @@ export interface AssetClaimResponse {

 export interface AssetAssign {
  asset_id: number;
-  heir_name: string;
+  heir_email: string;
 }

 // =============================================================================
@@ -59,6 +60,7 @@ const MOCK_ASSETS: Asset[] = [
    author_id: MOCK_CONFIG.USER.id,
    private_key_shard: 'mock_shard_1',
    content_outer_encrypted: 'mock_encrypted_content_1',
+    heir_email: 'heir@example.com',
  },
  {
    id: 2,
@@ -217,7 +219,7 @@ export const assetsService = {
      logApiDebug('Assign Asset', 'Using mock mode');
      return new Promise((resolve) => {
        setTimeout(() => {
-          resolve({ message: `Asset assigned to ${assignment.heir_name}` });
+          resolve({ message: `Asset assigned to ${assignment.heir_email}` });
        }, MOCK_CONFIG.RESPONSE_DELAY);
      });
    }
@@ -245,4 +247,44 @@ export const assetsService = {
      throw error;
    }
  },
+
+  /**
+   * Delete an asset
+   * @param assetId - ID of the asset to delete
+   * @param token - JWT token for authentication
+   * @returns Success message
+   */
+  async deleteAsset(assetId: number, token: string): Promise<{ message: string }> {
+    if (NO_BACKEND_MODE) {
+      logApiDebug('Delete Asset', `Using mock mode for ID: ${assetId}`);
+      return new Promise((resolve) => {
+        setTimeout(() => {
+          resolve({ message: 'Asset deleted successfully' });
+        }, MOCK_CONFIG.RESPONSE_DELAY);
+      });
+    }
+
+    const url = buildApiUrl(API_ENDPOINTS.ASSETS.DELETE);
+    logApiDebug('Delete Asset URL', url);
+
+    try {
+      const response = await fetch(url, {
+        method: 'POST',
+        headers: getApiHeaders(token),
+        body: JSON.stringify({ asset_id: assetId }),
+      });
+
+      logApiDebug('Delete Asset Response Status', response.status);
+
+      if (!response.ok) {
+        const errorData = await response.json().catch(() => ({}));
+        throw new Error(errorData.detail || 'Failed to delete asset');
+      }
+
+      return await response.json();
+    } catch (error) {
+      console.error('Delete asset error:', error);
+      throw error;
+    }
+  },
 };
--- a/src/services/langgraph.service.ts
+++ b/src/services/langgraph.service.ts
@@ -0,0 +1,96 @@
+/**
+ * LangGraph Service
+ * 
+ * Implements AI chat logic using LangGraph.js for state management
+ * and context handling.
+ */
+
+import { StateGraph, START, END, Annotation } from "@langchain/langgraph";
+import { BaseMessage, HumanMessage, AIMessage, SystemMessage } from "@langchain/core/messages";
+import { aiService } from "./ai.service";
+import { trimLangChainMessages } from "../utils/token_utils";
+
+// =============================================================================
+// Settings
+// =============================================================================
+
+/**
+ * Define the State using Annotation (Standard for latest LangGraph.js)
+ */
+const GraphAnnotation = Annotation.Root({
+    messages: Annotation<BaseMessage[]>({
+        reducer: (x, y) => x.concat(y),
+        default: () => [],
+    }),
+});
+
+// =============================================================================
+// Graph Definition
+// =============================================================================
+
+/**
+ * The main node that calls our existing AI API
+ */
+async function callModel(state: typeof GraphAnnotation.State, config: any) {
+    const { messages } = state;
+    const { token } = config.configurable || {};
+
+    // 1. Trim messages to stay under token limit
+    const trimmedMessages = trimLangChainMessages(messages);
+
+    // 2. Convert LangChain messages to our internal AIMessage format for the API
+    const apiMessages = trimmedMessages.map(m => {
+        let role: 'system' | 'user' | 'assistant' = 'user';
+        const type = (m as any)._getType?.() || (m instanceof SystemMessage ? 'system' : m instanceof HumanMessage ? 'human' : m instanceof AIMessage ? 'ai' : 'user');
+
+        if (type === 'system') role = 'system';
+        else if (type === 'human') role = 'user';
+        else if (type === 'ai') role = 'assistant';
+
+        return {
+            role,
+            content: m.content.toString()
+        };
+    });
+
+    // 3. Call the proxy service
+    const response = await aiService.chat(apiMessages, token);
+    const content = response.choices[0]?.message?.content || "No response generated";
+
+    // 4. Return the new message to satisfy the Graph (it will be appended due to reducer)
+    return {
+        messages: [new AIMessage(content)]
+    };
+}
+
+// =============================================================================
+// Service Export
+// =============================================================================
+
+export const langGraphService = {
+    /**
+     * Run the chat graph with history
+     */
+    async execute(
+        currentMessages: BaseMessage[],
+        userToken: string,
+    ): Promise<string> {
+        // Define the graph
+        const workflow = new StateGraph(GraphAnnotation)
+            .addNode("agent", callModel)
+            .addEdge(START, "agent")
+            .addEdge("agent", END);
+
+        const app = workflow.compile();
+
+        // Execute the graph
+        const result = await app.invoke(
+            { messages: currentMessages },
+            { configurable: { token: userToken } }
+        );
+
+        // Return the content of the last message (the AI response)
+        const lastMsg = result.messages[result.messages.length - 1];
+        return lastMsg.content.toString();
+    }
+};
--- a/src/services/storage.service.ts
+++ b/src/services/storage.service.ts
@@ -14,6 +14,7 @@ import AsyncStorage from '@react-native-async-storage/async-storage';
 const STORAGE_KEYS = {
    CHAT_HISTORY: '@sentinel:chat_history',
    CURRENT_MESSAGES: '@sentinel:current_messages',
+    ASSET_BACKUP: '@sentinel:asset_backup',
 } as const;

 // =============================================================================
@@ -115,6 +116,32 @@ export const storageService = {
        } catch (e) {
            console.error('Error clearing storage data:', e);
        }
+    },
+
+    /**
+     * Save the plaintext backup of an asset locally
+     */
+    async saveAssetBackup(assetId: number, content: string, userId: string | number): Promise<void> {
+        try {
+            const key = `${this.getUserKey(STORAGE_KEYS.ASSET_BACKUP, userId)}:${assetId}`;
+            await AsyncStorage.setItem(key, content);
+            console.log(`[Storage] Saved asset backup for user ${userId}, asset ${assetId}`);
+        } catch (e) {
+            console.error(`Error saving asset backup for asset ${assetId}:`, e);
+        }
+    },
+
+    /**
+     * Retrieve the plaintext backup of an asset locally
+     */
+    async getAssetBackup(assetId: number, userId: string | number): Promise<string | null> {
+        try {
+            const key = `${this.getUserKey(STORAGE_KEYS.ASSET_BACKUP, userId)}:${assetId}`;
+            return await AsyncStorage.getItem(key);
+        } catch (e) {
+            console.error(`Error getting asset backup for asset ${assetId}:`, e);
+            return null;
+        }
    }
 };

--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -28,6 +28,8 @@ export interface VaultAsset {
  createdAt: Date;
  updatedAt: Date;
  isEncrypted: boolean;
+  heirEmail?: string;
+  rawData?: any; // For debug logging
 }

 // Sentinel Types
@@ -102,3 +104,13 @@ export interface LoginResponse {
  token_type: string;
  user: User;
 }
+
+// AI Types
+export interface AIRole {
+  id: string;
+  name: string;
+  description: string;
+  systemPrompt: string;
+  icon: string;
+  iconFamily: string;
+}
--- a/src/utils/async_hooks_mock.ts
+++ b/src/utils/async_hooks_mock.ts
@@ -0,0 +1,22 @@
+/**
+ * Mock for Node.js async_hooks
+ * Used to fix LangGraph.js compatibility with React Native
+ */
+
+export class AsyncLocalStorage {
+    disable() { }
+    getStore() {
+        return undefined;
+    }
+    run(store: any, callback: (...args: any[]) => any, ...args: any[]) {
+        return callback(...args);
+    }
+    exit(callback: (...args: any[]) => any, ...args: any[]) {
+        return callback(...args);
+    }
+    enterWith(store: any) { }
+}
+
+export default {
+    AsyncLocalStorage,
+};
--- a/src/utils/crypto_core.ts
+++ b/src/utils/crypto_core.ts
@@ -0,0 +1,202 @@
+import * as bip39 from 'bip39';
+import * as crypto from 'crypto';
+
+// 定义分片类型：[x坐标, y坐标]
+export type Share = [bigint, bigint];
+
+// 定义生成密钥的返回接口
+export interface VaultKeys {
+    mnemonic: string;
+    entropyHex: string;
+}
+
+export class SentinelKeyEngine {
+    // 使用第 13 个梅森素数 (2^521 - 1)
+    // readonly 确保不会被修改
+    private readonly PRIME: bigint = 2n ** 521n - 1n;
+
+    /**
+     * 1. 生成原始 12 助记词 (Master Key)
+     */
+    public generateVaultKeys(): VaultKeys {
+        // 生成 128 位强度的助记词 (12 个单词)
+        const mnemonic = bip39.generateMnemonic(128);
+
+        // 将助记词转为 16 进制熵 (Hex String)
+        const entropyHex = bip39.mnemonicToEntropy(mnemonic);
+
+        return { mnemonic, entropyHex };
+    }
+
+    public mnemonicToEntropy(mnemonic: string): string {
+        return bip39.mnemonicToEntropy(mnemonic);
+    }
+
+    /**
+     * 2. SSS (3,2) 门限分片逻辑
+     * @param entropyHex - 16进制字符串 (32字符)
+     */
+    public splitToShares(entropyHex: string): Share[] {
+        // 将 Hex 熵转换为 BigInt
+        const secretInt = BigInt('0x' + entropyHex);
+
+        // 生成随机系数 a，范围 [0, PRIME-1]
+        const a = this.secureRandomBigInt(this.PRIME);
+
+        // 定义函数 f(x) = (S + a * x) % PRIME
+        const f = (x: number): bigint => {
+            const xBi = BigInt(x);
+            return (secretInt + a * xBi) % this.PRIME;
+        };
+
+        // 生成 3 个分片: x=1, x=2, x=3
+        const share1: Share = [1n, f(1)]; // 手机分片
+        const share2: Share = [2n, f(2)]; // 云端分片
+        const share3: Share = [3n, f(3)]; // 传承卡分片
+
+        return [share1, share2, share3];
+    }
+
+    /**
+     * 3. 恢复逻辑：拉格朗日插值还原
+     * @param shareA - 第一个分片
+     * @param shareB - 第二个分片
+     */
+    public recoverFromShares(shareA: Share, shareB: Share): string {
+        const [x1, y1] = shareA;
+        const [x2, y2] = shareB;
+
+        // 计算分子: (x2 * y1 - x1 * y2) % PRIME
+        // TS/JS 的 % 运算符对负数返回负数，需修正为正余数
+        let numerator = (x2 * y1 - x1 * y2) % this.PRIME;
+        if (numerator < 0n) numerator += this.PRIME;
+
+        // 计算分母: (x2 - x1)
+        let denominator = (x2 - x1) % this.PRIME;
+        if (denominator < 0n) denominator += this.PRIME;
+
+        // 计算分母的模逆: denominator^-1 mod PRIME
+        // 费马小定理: a^(p-2) = a^-1 (mod p)
+        const invDenominator = this.modPow(denominator, this.PRIME - 2n, this.PRIME);
+
+        // 还原常数项 S
+        const secretInt = (numerator * invDenominator) % this.PRIME;
+
+        // 转回 Hex 字符串
+        let recoveredEntropyHex = secretInt.toString(16);
+
+        // 补齐前导零 (Pad Start)
+        // 128 bit 熵 = 16 字节 = 32 个 Hex 字符
+        // 如果你的熵是 256 bit，这里需要改为 64
+        recoveredEntropyHex = recoveredEntropyHex.padStart(32, '0');
+
+        return bip39.entropyToMnemonic(recoveredEntropyHex);
+    }
+
+    // --- Private Helper Methods ---
+
+    /**
+     * 生成小于 limit 的安全随机 BigInt
+     */
+    private secureRandomBigInt(limit: bigint): bigint {
+        // 计算需要的字节数
+        const bitLength = limit.toString(2).length;
+        const byteLength = Math.ceil(bitLength / 8);
+
+        let randomBi: bigint;
+        do {
+            const buf = crypto.randomBytes(byteLength);
+            randomBi = BigInt('0x' + buf.toString('hex'));
+            // 拒绝采样：确保结果小于 limit
+        } while (randomBi >= limit);
+
+        return randomBi;
+    }
+
+    /**
+     * 模幂运算: (base^exp) % modulus
+     * 用于计算模逆
+     */
+    private modPow(base: bigint, exp: bigint, modulus: bigint): bigint {
+        let result = 1n;
+        base = base % modulus;
+        while (exp > 0n) {
+            if (exp % 2n === 1n) result = (result * base) % modulus;
+            exp = exp >> 1n; // 相当于除以 2
+            base = (base * base) % modulus;
+        }
+        return result;
+    }
+}
+
+export class SentinelVault {
+    private salt: Buffer;
+
+    constructor(salt?: string | Buffer) {
+        // 默认盐值与 Python 版本保持一致
+        this.salt = salt ? Buffer.from(salt) : Buffer.from('Sentinel_Salt_2026');
+    }
+
+    /**
+     * 使用 PBKDF2 将助记词转换为 AES-256 密钥 (32 bytes)
+     */
+    public async deriveKey(mnemonicPhrase: string): Promise<Buffer> {
+        // 1. BIP-39 助记词转种子 (遵循 BIP-39 标准)
+        // Python 的 to_seed 默认返回 64 字节种子
+        const seed = await bip39.mnemonicToSeed(mnemonicPhrase);
+
+        // 2. PBKDF2 派生密钥
+        // 注意：PyCryptodome 的 PBKDF2 默认使用 HMAC-SHA1 (如未指定)
+        // 为了确保与 Python 逻辑严格一致，这里使用 'sha1'
+        return new Promise((resolve, reject) => {
+            crypto.pbkdf2(seed, this.salt, 100000, 32, 'sha1', (err, derivedKey) => {
+                if (err) reject(err);
+                resolve(derivedKey);
+            });
+        });
+    }
+
+    /**
+     * 使用 AES-256-GCM 模式进行加密
+     */
+    public encryptData(key: Buffer, plaintext: string): Buffer {
+        // GCM 模式推荐 nonce 长度，Python 默认通常为 16 字节
+        const iv = crypto.randomBytes(16);
+        const cipher = crypto.createCipheriv('aes-256-gcm', key, iv);
+
+        const ciphertext = Buffer.concat([
+            cipher.update(plaintext, 'utf8'),
+            cipher.final()
+        ]);
+
+        // 获取 GCM 认证标签 (16 bytes)
+        const tag = cipher.getAuthTag();
+
+        // 拼接结果：Nonce + Tag + Ciphertext
+        return Buffer.concat([iv, tag, ciphertext]);
+    }
+
+    /**
+     * AES-256-GCM 解密
+     */
+    public decryptData(key: Buffer, encryptedBlob: Buffer): string {
+        try {
+            // 切片提取组件
+            const iv = encryptedBlob.subarray(0, 16);
+            const tag = encryptedBlob.subarray(16, 32);
+            const ciphertext = encryptedBlob.subarray(32);
+
+            const decipher = crypto.createDecipheriv('aes-256-gcm', key, iv);
+            decipher.setAuthTag(tag);
+
+            const decrypted = Buffer.concat([
+                decipher.update(ciphertext),
+                decipher.final()
+            ]);
+
+            return decrypted.toString('utf8');
+        } catch (error) {
+            return "【解密失败】：密钥错误或数据被篡改";
+        }
+    }
+}
--- a/src/utils/crypto_polyfill.ts
+++ b/src/utils/crypto_polyfill.ts
@@ -0,0 +1,135 @@
+import * as ExpoCrypto from 'expo-crypto';
+import { Buffer } from 'buffer';
+import { pbkdf2 as noblePbkdf2 } from '@noble/hashes/pbkdf2';
+import { sha1 } from '@noble/hashes/sha1';
+import { sha256 } from '@noble/hashes/sha256';
+import { sha512 } from '@noble/hashes/sha512';
+import { gcm } from '@noble/ciphers/aes';
+
+/**
+ * Node.js Crypto Polyfill for React Native
+ */
+
+export function randomBytes(size: number): Buffer {
+    const bytes = new Uint8Array(size);
+    ExpoCrypto.getRandomValues(bytes);
+    return Buffer.from(bytes);
+}
+
+const hashMap: Record<string, any> = {
+    sha1,
+    sha256,
+    sha512,
+};
+
+export function pbkdf2(
+    password: string | Buffer,
+    salt: string | Buffer,
+    iterations: number,
+    keylen: number,
+    digest: string,
+    callback: (err: Error | null, derivedKey: Buffer) => void
+): void {
+    try {
+        const passwordBytes = typeof password === 'string' ? Buffer.from(password) : password;
+        const saltBytes = typeof salt === 'string' ? Buffer.from(salt) : salt;
+        const hasher = hashMap[digest.toLowerCase()];
+
+        if (!hasher) {
+            throw new Error(`Unsupported digest: ${digest}`);
+        }
+
+        const result = noblePbkdf2(hasher, passwordBytes, saltBytes, {
+            c: iterations,
+            dkLen: keylen,
+        });
+
+        callback(null, Buffer.from(result));
+    } catch (err) {
+        callback(err as Error, Buffer.alloc(0));
+    }
+}
+
+// AES-GCM Implementation
+class Cipher {
+    private key: Uint8Array;
+    private iv: Uint8Array;
+    private authTag: Buffer | null = null;
+    private aesGcm: any;
+    private buffer: Buffer = Buffer.alloc(0);
+
+    constructor(key: Buffer, iv: Buffer) {
+        this.key = new Uint8Array(key);
+        this.iv = new Uint8Array(iv);
+        // @noble/ciphers/aes gcm takes (key, nonce)
+        this.aesGcm = gcm(this.key, this.iv);
+    }
+
+    update(data: string | Buffer, inputEncoding?: string): Buffer {
+        const input = typeof data === 'string' ? Buffer.from(data, inputEncoding as any) : data;
+        this.buffer = Buffer.concat([this.buffer, input]);
+        return Buffer.alloc(0);
+    }
+
+    final(): Buffer {
+        const result = this.aesGcm.encrypt(this.buffer);
+        // @noble/ciphers returns ciphertext + tag (16 bytes)
+        const tag = result.slice(-16);
+        const ciphertext = result.slice(0, -16);
+        this.authTag = Buffer.from(tag);
+        return Buffer.from(ciphertext);
+    }
+
+    getAuthTag(): Buffer {
+        if (!this.authTag) throw new Error('Ciphers: TAG not available before final()');
+        return this.authTag;
+    }
+}
+
+class Decipher {
+    private key: Uint8Array;
+    private iv: Uint8Array;
+    private tag: Uint8Array | null = null;
+    private aesGcm: any;
+    private buffer: Buffer = Buffer.alloc(0);
+
+    constructor(key: Buffer, iv: Buffer) {
+        this.key = new Uint8Array(key);
+        this.iv = new Uint8Array(iv);
+        this.aesGcm = gcm(this.key, this.iv);
+    }
+
+    setAuthTag(tag: Buffer): void {
+        this.tag = new Uint8Array(tag);
+    }
+
+    update(data: Buffer): Buffer {
+        this.buffer = Buffer.concat([this.buffer, data]);
+        return Buffer.alloc(0);
+    }
+
+    final(): Buffer {
+        if (!this.tag) throw new Error('Decipher: Auth tag not set');
+        // @noble/ciphers expects ciphertext then tag
+        const full = new Uint8Array(this.buffer.length + this.tag.length);
+        full.set(this.buffer);
+        full.set(this.tag, this.buffer.length);
+
+        const decrypted = this.aesGcm.decrypt(full);
+        return Buffer.from(decrypted);
+    }
+}
+
+export function createCipheriv(algorithm: string, key: Buffer, iv: Buffer): Cipher {
+    if (algorithm !== 'aes-256-gcm') {
+        throw new Error(`Polyfill only supports aes-256-gcm, got ${algorithm}`);
+    }
+    return new Cipher(key, iv);
+}
+
+export function createDecipheriv(algorithm: string, key: Buffer, iv: Buffer): Decipher {
+    if (algorithm !== 'aes-256-gcm') {
+        throw new Error(`Polyfill only supports aes-256-gcm, got ${algorithm}`);
+    }
+    return new Decipher(key, iv);
+}
--- a/src/utils/token_utils.ts
+++ b/src/utils/token_utils.ts
@@ -0,0 +1,76 @@
+/**
+ * Token Utilities
+ * 
+ * Shared logic for trimming messages to stay within token limits.
+ */
+
+import { BaseMessage, SystemMessage } from "@langchain/core/messages";
+import { AIMessage as ServiceAIMessage } from "../services/ai.service";
+
+export const TOKEN_LIMIT = 10000;
+const CHARS_PER_TOKEN = 3; // Conservative estimate: 1 token ≈ 3 chars
+export const MAX_CHARS = TOKEN_LIMIT * CHARS_PER_TOKEN;
+
+/**
+ * Trims LangChain messages to fit within token limit
+ */
+export function trimLangChainMessages(messages: BaseMessage[]): BaseMessage[] {
+    let totalLength = 0;
+    const trimmed: BaseMessage[] = [];
+
+    // Always keep the system message if it's at the start
+    let systemMsg: BaseMessage | null = null;
+    if (messages.length > 0 && (messages[0] instanceof SystemMessage || (messages[0] as any)._getType?.() === 'system')) {
+        systemMsg = messages[0];
+        totalLength += systemMsg.content.toString().length;
+    }
+
+    // Iterate backwards and add messages until we hit the char limit
+    for (let i = messages.length - 1; i >= (systemMsg ? 1 : 0); i--) {
+        const msg = messages[i];
+        const len = msg.content.toString().length;
+
+        if (totalLength + len > MAX_CHARS) break;
+
+        trimmed.unshift(msg);
+        totalLength += len;
+    }
+
+    if (systemMsg) {
+        trimmed.unshift(systemMsg);
+    }
+
+    return trimmed;
+}
+
+/**
+ * Trims internal AIMessage format messages to fit within token limit
+ */
+export function trimInternalMessages(messages: ServiceAIMessage[]): ServiceAIMessage[] {
+    let totalLength = 0;
+    const trimmed: ServiceAIMessage[] = [];
+
+    // Always keep the system message if it's at the start
+    let systemMsg: ServiceAIMessage | null = null;
+    if (messages.length > 0 && messages[0].role === 'system') {
+        systemMsg = messages[0];
+        totalLength += systemMsg.content.length;
+    }
+
+    // Iterate backwards and add messages until we hit the char limit
+    for (let i = messages.length - 1; i >= (systemMsg ? 1 : 0); i--) {
+        const msg = messages[i];
+        const len = msg.content.length;
+
+        if (totalLength + len > MAX_CHARS) break;
+
+        trimmed.unshift(msg);
+        totalLength += len;
+    }
+
+    if (systemMsg) {
+        trimmed.unshift(systemMsg);
+    }
+
+    return trimmed;
+}
--- a/src/utils/vaultAssets.ts
+++ b/src/utils/vaultAssets.ts
@@ -14,8 +14,13 @@ export interface ApiAsset {
  id: number;
  title: string;
  type?: string;
+  author_id?: number;
+  private_key_shard?: string;
+  content_outer_encrypted?: string;
  created_at?: string;
  updated_at?: string;
+  heir_id?: number;
+  heir_email?: string;
 }

 // -----------------------------------------------------------------------------
@@ -31,6 +36,8 @@ export const VAULT_ASSET_TYPES: VaultAssetType[] = [
  'custom',
 ];

+export const initialVaultAssets: VaultAsset[] = [];
+
 // -----------------------------------------------------------------------------
 // Mapping
 // -----------------------------------------------------------------------------
@@ -50,6 +57,8 @@ export function mapApiAssetToVaultAsset(api: ApiAsset): VaultAsset {
    createdAt: api.created_at ? new Date(api.created_at) : new Date(),
    updatedAt: api.updated_at ? new Date(api.updated_at) : new Date(),
    isEncrypted: true,
+    heirEmail: api.heir_email,
+    rawData: api,
  };
 }

@@ -60,41 +69,3 @@ export function mapApiAssetsToVaultAssets(apiList: ApiAsset[]): VaultAsset[] {
  return apiList.map(mapApiAssetToVaultAsset);
 }

-// -----------------------------------------------------------------------------
-// Mock / initial data (fallback when API is unavailable)
-// -----------------------------------------------------------------------------
-
-export const initialVaultAssets: VaultAsset[] = [
-  {
-    id: '1',
-    type: 'private_key',
-    label: 'ETH Main Wallet Key',
-    createdAt: new Date('2024-01-10'),
-    updatedAt: new Date('2024-01-10'),
-    isEncrypted: true,
-  },
-  {
-    id: '2',
-    type: 'game_account',
-    label: 'Steam Account Credentials',
-    createdAt: new Date('2024-01-08'),
-    updatedAt: new Date('2024-01-08'),
-    isEncrypted: true,
-  },
-  {
-    id: '3',
-    type: 'document',
-    label: 'Insurance Policy Scan',
-    createdAt: new Date('2024-01-05'),
-    updatedAt: new Date('2024-01-05'),
-    isEncrypted: true,
-  },
-  {
-    id: '4',
-    type: 'will',
-    label: 'Testament Draft v2',
-    createdAt: new Date('2024-01-02'),
-    updatedAt: new Date('2024-01-15'),
-    isEncrypted: true,
-  },
-];
Author	SHA1	Message	Date
Ada	1e6c06bfef	Merge branch 'main' into mobile-demo	2026-02-04 17:23:25 -08:00
Ada	8994a3e045	feat(flow): image attachment and 422 error message display - Attach image then send with optional text or image-only (default prompt) - Attached image preview above input with remove - AI image API error detail no longer shows [object Object]	2026-02-04 17:19:51 -08:00
Ada	d44ccc3ace	feat(flow): add interactive AI puppet to FlowScreen - Added puppet component modules: PuppetView, FlowPuppetSlot, and type definitions - The puppet supports actions such as idle/smile/jump/shake/think, with a default smile. - FlowScreen integrates puppet slots; it automatically uses the "think" function when sending messages and allows for interactive actions like Smile/Jump/Shake. - The code is independent of the existing chat logic and does not affect existing functionality.	2026-02-04 16:57:28 -08:00
Ada	e33ea62e35	fix(mobile): polyfill - polyfill crypto.getRandomValues (uuid/LangChain not supported）) - polyfill AbortSignal.prototype.throwIfAborted (throwIfAborted is not a function）")	2026-02-04 16:48:00 -08:00
Ada	96d95a50fc	fix: resolve ReadableStream in simulator so LangGraph runs on RN - Add src/polyfills.ts as the first executed module; inject ReadableStream/WritableStream/TransformStream via web-streams-polyfill and ponyfill fallback - Import polyfills at the top of App.tsx so globals are set before any LangChain/LangGraph code loads - Add assets/images/icon.png to fix Metro “Asset not found” for icon	2026-02-04 15:24:14 -08:00
lusixing	c1ce804d14	langgraph_used	2026-02-03 21:37:41 -08:00
lusixing	0aab9a838b	ai_role_update	2026-02-02 22:20:24 -08:00
lusixing	6822638d47	complete_heir_functions	2026-02-02 19:40:49 -08:00
lusixing	5c1172a912	added_reveal_secret_and_delete_treasure	2026-02-02 17:34:03 -08:00
lusixing	b5373c2d9a	update_260201-3	2026-02-01 21:13:15 -08:00
Ada	3ffcc60ee8	feat(vault): vault storage (user-isolated, multi-account)	2026-02-01 15:22:32 -08:00