Fix form keyboard issues and sticky footers in agent screens

src/services/security/biometrics.ts

@@ -0,0 +1,23 @@
+import ReactNativeBiometrics from 'react-native-biometrics';
+
+import { appConfig } from '../../config/appConfig';
+
+const biometricsClient = new ReactNativeBiometrics();
+
+export const biometrics = {
+  async isAvailable() {
+    const { available } = await biometricsClient.isSensorAvailable();
+
+    return available;
+  },
+
+  async prompt() {
+    try {
+      return await biometricsClient.simplePrompt({
+        promptMessage: appConfig.security.biometricPromptTitle,
+      });
+    } catch {
+      return { success: false };
+    }
+  },
+};

src/services/security/sessionManager.ts

@@ -0,0 +1,17 @@
+import { appConfig } from '../../config/appConfig';
+
+let lastActivityAt = Date.now();
+
+export const sessionManager = {
+  touch() {
+    lastActivityAt = Date.now();
+  },
+
+  getIdleDurationMs() {
+    return Date.now() - lastActivityAt;
+  },
+
+  hasExpired() {
+    return this.getIdleDurationMs() >= appConfig.security.sessionTimeoutMs;
+  },
+};