Show QR codes for invite and public share links.

Generate scannable QR codes in settings next to collaboration links so crew can open invites on mobile without copying long URLs.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/src/components/LinkQrCode.tsx

@@ -0,0 +1,54 @@
+import { useEffect, useState } from 'react'
+import { useTranslation } from 'react-i18next'
+import QRCode from 'qrcode'
+
+interface LinkQrCodeProps {
+  value: string
+  size?: number
+}
+
+export default function LinkQrCode({ value, size = 200 }: LinkQrCodeProps) {
+  const { t } = useTranslation()
+  const [dataUrl, setDataUrl] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (!value.trim()) {
+      setDataUrl(null)
+      return
+    }
+
+    let cancelled = false
+    void QRCode.toDataURL(value, {
+      width: size,
+      margin: 2,
+      errorCorrectionLevel: 'M',
+      color: { dark: '#0f172a', light: '#ffffff' }
+    })
+      .then((url) => {
+        if (!cancelled) setDataUrl(url)
+      })
+      .catch((err) => {
+        console.error('QR code generation failed:', err)
+        if (!cancelled) setDataUrl(null)
+      })
+
+    return () => {
+      cancelled = true
+    }
+  }, [value, size])
+
+  if (!value.trim() || !dataUrl) return null
+
+  return (
+    <div className="link-qr-block">
+      <p className="link-qr-label">{t('settings.link_qr_hint')}</p>
+      <img
+        src={dataUrl}
+        width={size}
+        height={size}
+        className="link-qr-image"
+        alt={t('settings.link_qr_alt')}
+      />
+    </div>
+  )
+}

client/src/components/LiveLogView.tsx

@@ -21,7 +21,6 @@ import {
   Zap
 } from 'lucide-react'
 import { db } from '../services/db.js'
-import { getActiveMasterKey } from '../services/auth.js'
 import { getLogbookKey } from '../services/logbookKeys.js'
 import { decryptJson } from '../services/crypto.js'
 import { PlausibleEvents, trackPlausibleEvent } from '../services/analytics.js'
@@ -66,8 +65,6 @@ import CourseDialInput from './CourseDialInput.tsx'
 import LiveCameraCapture from './LiveCameraCapture.tsx'
 import { saveEntryPhoto, deleteEntryPhoto } from '../services/photoAttachments.js'
 import { blobToCompressedJpegDataUrl } from '../utils/imageCompress.js'
-import i18n from '../i18n/index.js'
-
 interface LiveLogViewProps {
   logbookId: string
   onOpenEditor: (entryId: string) => void

client/src/components/SettingsForm.tsx

@@ -3,6 +3,7 @@ import { useTranslation } from 'react-i18next'
 import { Settings as SettingsIcon, Check, Users, Trash2, Copy, Link as LinkIcon } from 'lucide-react'
 import { ensureLogbookKey } from '../services/logbookKeys.js'
 import LogbookBackupPanel from './LogbookBackupPanel.tsx'
+import LinkQrCode from './LinkQrCode.tsx'
 import { useDialog } from './ModalDialog.tsx'
 import { PlausibleEvents, trackPlausibleEvent } from '../services/analytics.js'
 import { apiFetch } from '../services/api.js'
@@ -314,23 +315,27 @@ export default function SettingsForm({ logbookId, onLogbookRestored }: SettingsF
           </div>
 
           {shareEnabled && shareLink && (
-            <div className="input-group mb-4 copy-link-row">
-              <input
-                type="text"
-                readOnly
-                value={shareLink}
-                className="input-text font-mono text-xs"
-                style={{ flex: 1, padding: '10px' }}
-                onClick={(e) => (e.target as HTMLInputElement).select()}
-              />
-              <button
-                type="button"
-                className="btn secondary"
-                onClick={handleCopyShareLink}
-                style={{ width: 'auto', padding: '10px' }}
-              >
-                {shareCopied ? <Check size={16} /> : <Copy size={16} />}
-              </button>
+            <div className="link-with-qr mb-4">
+              <div className="input-group copy-link-row">
+                <input
+                  type="text"
+                  readOnly
+                  value={shareLink}
+                  className="input-text font-mono text-xs"
+                  style={{ flex: 1, padding: '10px' }}
+                  onClick={(e) => (e.target as HTMLInputElement).select()}
+                />
+                <button
+                  type="button"
+                  className="btn secondary"
+                  onClick={handleCopyShareLink}
+                  style={{ width: 'auto', padding: '10px' }}
+                  title={t('settings.share_copy_btn')}
+                >
+                  {shareCopied ? <Check size={16} /> : <Copy size={16} />}
+                </button>
+              </div>
+              <LinkQrCode value={shareLink} />
             </div>
           )}
         </div>
@@ -367,23 +372,27 @@ export default function SettingsForm({ logbookId, onLogbookRestored }: SettingsF
           </div>
 
           {inviteLink && (
-            <div className="input-group mb-6 copy-link-row">
-              <input
-                type="text"
-                readOnly
-                value={inviteLink}
-                className="input-text font-mono text-xs"
-                style={{ flex: 1, padding: '10px' }}
-                onClick={(e) => (e.target as HTMLInputElement).select()}
-              />
-              <button
-                type="button"
-                className="btn secondary"
-                onClick={handleCopyInvite}
-                style={{ width: 'auto', padding: '10px' }}
-              >
-                {inviteCopied ? <Check size={16} /> : <Copy size={16} />}
-              </button>
+            <div className="link-with-qr mb-6">
+              <div className="input-group copy-link-row">
+                <input
+                  type="text"
+                  readOnly
+                  value={inviteLink}
+                  className="input-text font-mono text-xs"
+                  style={{ flex: 1, padding: '10px' }}
+                  onClick={(e) => (e.target as HTMLInputElement).select()}
+                />
+                <button
+                  type="button"
+                  className="btn secondary"
+                  onClick={handleCopyInvite}
+                  style={{ width: 'auto', padding: '10px' }}
+                  title={t('settings.share_copy_btn')}
+                >
+                  {inviteCopied ? <Check size={16} /> : <Copy size={16} />}
+                </button>
+              </div>
+              <LinkQrCode value={inviteLink} />
             </div>
           )}