Email confirmation, change email/password, show/hide passwords

- Sign-up emails a confirmation link (24h); unconfirmed accounts see a
  banner on the web with "send it again", and status in Settings.
- Change email (needs the password): the new address gets a confirmation
  link and only replaces the old one once clicked; the old address gets a
  heads-up with a reset-password link. Pending changes can be cancelled.
- Change password (needs the current one): signs out other sessions.
- Password fields have Show/Hide on web and mobile.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MzFywujuH9TiuXbr9vjoX8

apps/mobile/src/app/(tabs)/settings.tsx

@@ -418,7 +418,22 @@ function JellyfinConnection({
 }
 
 function Account() {
-  const { me, signOut } = useSession();
+  const { me, setMe, signOut } = useSession();
+  const resend = async () => {
+    try {
+      await api.resendVerification();
+      Alert.alert('Sent', `We sent a new link to ${me?.email}.`);
+    } catch (err) {
+      showError(err);
+    }
+  };
+  const cancelChange = async () => {
+    try {
+      setMe(await api.cancelEmailChange());
+    } catch (err) {
+      showError(err);
+    }
+  };
   const confirmDelete = () =>
     Alert.alert('Delete your account?', 'This permanently removes your profile, follows and connected services.', [
       { text: 'Cancel', style: 'cancel' },
@@ -439,8 +454,22 @@ function Account() {
     <Card>
       <Heading>Account</Heading>
       <Body muted style={styles.small}>
-        Signed in as @{me?.username} · {me?.plan === 'free' ? 'Free plan' : 'Plus'}
+        Signed in as @{me?.username}
       </Body>
+      <Body style={styles.small}>
+        {me?.email} · {me?.emailVerified ? 'confirmed' : 'not confirmed'}
+      </Body>
+      {me?.pendingEmail ? (
+        <Body muted style={styles.small}>
+          Changing to {me.pendingEmail}: open the link we sent there.
+        </Body>
+      ) : null}
+      <Row>
+        {me && !me.emailVerified && !me.pendingEmail && <Button small variant="primary" title="Resend confirmation" onPress={resend} />}
+        {me?.pendingEmail && <Button small title="Cancel email change" onPress={cancelChange} />}
+        <Button small title="Change email" onPress={() => router.push('/change-email')} />
+        <Button small title="Change password" onPress={() => router.push('/change-password')} />
+      </Row>
       <Button small title="Blocked accounts" onPress={() => router.push('/blocked')} style={{ alignSelf: 'flex-start' }} />
       <Row>
         <Button small title="Log out" onPress={signOut} />

apps/mobile/src/app/_layout.tsx

@@ -96,6 +96,8 @@ function AppNavigator() {
           <Stack.Screen name="u/[username]/following" options={{ title: 'Following' }} />
           <Stack.Screen name="report/[username]" options={{ title: 'Report', presentation: 'modal' }} />
           <Stack.Screen name="blocked" options={{ title: 'Blocked accounts' }} />
+          <Stack.Screen name="change-password" options={{ title: 'Change password', presentation: 'modal' }} />
+          <Stack.Screen name="change-email" options={{ title: 'Change email', presentation: 'modal' }} />
           <Stack.Screen name="scan" options={{ title: 'Scan a code', presentation: 'modal' }} />
         </Stack.Protected>
         <Stack.Protected guard={!signedIn}>

apps/mobile/src/app/change-email.tsx

@@ -0,0 +1,46 @@
+import { router } from 'expo-router';
+import { useState } from 'react';
+import { Alert, KeyboardAvoidingView, Platform } from 'react-native';
+import { Screen } from '@/components/Screen';
+import { Body, Button, Field } from '@/components/ui';
+import { api } from '@/lib/api';
+import { showError } from '@/lib/errors';
+import { useSession } from '@/lib/session';
+
+export default function ChangeEmailScreen() {
+  const { setMe } = useSession();
+  const [email, setEmail] = useState('');
+  const [password, setPassword] = useState('');
+  const [busy, setBusy] = useState(false);
+
+  const submit = async () => {
+    setBusy(true);
+    try {
+      setMe(await api.changeEmail({ email: email.trim(), password }));
+      Alert.alert('Check your email', `Open the link we sent to ${email.trim()} to finish the change.`);
+      router.back();
+    } catch (err) {
+      showError(err, "Couldn't change your email");
+    }
+    setBusy(false);
+  };
+
+  return (
+    <KeyboardAvoidingView style={{ flex: 1 }} behavior={Platform.OS === 'ios' ? 'padding' : undefined}>
+      <Screen>
+        <Field
+          label="New email"
+          value={email}
+          onChangeText={setEmail}
+          autoCapitalize="none"
+          autoComplete="email"
+          keyboardType="email-address"
+          textContentType="emailAddress"
+        />
+        <Field label="Your password" value={password} onChangeText={setPassword} secureTextEntry autoComplete="current-password" textContentType="password" />
+        <Body muted>Your email changes once you open the confirmation link we send to the new address.</Body>
+        <Button variant="primary" title="Send confirmation link" loading={busy} disabled={!email.trim() || !password} onPress={submit} />
+      </Screen>
+    </KeyboardAvoidingView>
+  );
+}

apps/mobile/src/app/change-password.tsx

@@ -0,0 +1,36 @@
+import { router } from 'expo-router';
+import { useState } from 'react';
+import { Alert, KeyboardAvoidingView, Platform } from 'react-native';
+import { Screen } from '@/components/Screen';
+import { Body, Button, Field } from '@/components/ui';
+import { api } from '@/lib/api';
+import { showError } from '@/lib/errors';
+
+export default function ChangePasswordScreen() {
+  const [current, setCurrent] = useState('');
+  const [next, setNext] = useState('');
+  const [busy, setBusy] = useState(false);
+
+  const submit = async () => {
+    setBusy(true);
+    try {
+      await api.changePassword({ currentPassword: current, newPassword: next });
+      Alert.alert('Password changed', 'Your other devices were signed out.');
+      router.back();
+    } catch (err) {
+      showError(err, "Couldn't change your password");
+    }
+    setBusy(false);
+  };
+
+  return (
+    <KeyboardAvoidingView style={{ flex: 1 }} behavior={Platform.OS === 'ios' ? 'padding' : undefined}>
+      <Screen>
+        <Field label="Current password" value={current} onChangeText={setCurrent} secureTextEntry autoComplete="current-password" textContentType="password" />
+        <Field label="New password" value={next} onChangeText={setNext} secureTextEntry autoComplete="new-password" textContentType="newPassword" />
+        <Body muted>At least 8 characters. This signs you out on your other devices.</Body>
+        <Button variant="primary" title="Change password" loading={busy} disabled={!current || next.length < 8} onPress={submit} />
+      </Screen>
+    </KeyboardAvoidingView>
+  );
+}