fix: prevent UI freeze after saving signed log entries

Cache plaintext list metadata on entry save so the journal list avoids
full decrypt per row, and batch sync pull writes with main-thread yields.

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

client/src/components/LogEntriesList.tsx

@@ -15,6 +15,12 @@ import LiveLogView from './LiveLogView.tsx'
 import EntrySkipperSignBadge from './EntrySkipperSignBadge.tsx'
 import { useDialog } from './ModalDialog.tsx'
 import { getSkipperSignStatus, type SkipperSignStatus } from '../utils/signatures.js'
+import {
+  buildEntryListCache,
+  entryListItemFromLocal,
+  putEntryRecord
+} from '../utils/entryListCache.js'
+import { forEachInBatches } from '../utils/yieldToMain.js'
 import { FileText, Plus, Trash2, ChevronRight, Calendar, Download, Share2, Radio, List } from 'lucide-react'
 import {
   carryOverFromPreviousDay,
@@ -116,24 +122,34 @@ export default function LogEntriesList({
       if (!masterKey) throw new Error('Encryption key not found. Please log in.')
 
       const local = await db.entries.where({ logbookId }).toArray()
-      
+
       const list: DecryptedEntryItem[] = []
-      
+      const needsDecrypt: typeof local = []
+
       for (const entry of local) {
-        const decrypted = await decryptJson(entry.encryptedData, entry.iv, entry.tag, masterKey)
-        if (decrypted) {
-          list.push({
-            id: entry.payloadId,
-            date: decrypted.date || '',
-            dayOfTravel: decrypted.dayOfTravel || '',
-            departure: decrypted.departure || '',
-            destination: decrypted.destination || '',
-            updatedAt: entry.updatedAt,
-            skipperSignStatus: await getSkipperSignStatus(decrypted as Record<string, unknown>)
-          })
+        const cached = entryListItemFromLocal(entry)
+        if (cached) {
+          list.push(cached)
+        } else {
+          needsDecrypt.push(entry)
         }
       }
 
+      await forEachInBatches(needsDecrypt, 8, async (entry) => {
+        const decrypted = await decryptJson(entry.encryptedData, entry.iv, entry.tag, masterKey)
+        if (!decrypted) return
+
+        const listCache = await buildEntryListCache(decrypted as Record<string, unknown>)
+        list.push({
+          id: entry.payloadId,
+          ...listCache,
+          updatedAt: entry.updatedAt
+        })
+        void db.entries.update(entry.payloadId, { listCache }).catch((err) => {
+          console.warn('Failed to persist entry list cache:', err)
+        })
+      })
+
       // Sort chronological descending (by date, or dayOfTravel numerical)
       list.sort((a, b) => {
         const dateCompare = new Date(b.date).getTime() - new Date(a.date).getTime()
@@ -309,14 +325,17 @@ export default function LogEntriesList({
       const encrypted = await encryptJson(initialPayload, masterKey)
 
       // Save locally
-      await db.entries.put({
-        payloadId: localId,
-        logbookId,
-        encryptedData: encrypted.ciphertext,
-        iv: encrypted.iv,
-        tag: encrypted.tag,
-        updatedAt: nowStr
-      })
+      await putEntryRecord(
+        {
+          payloadId: localId,
+          logbookId,
+          encryptedData: encrypted.ciphertext,
+          iv: encrypted.iv,
+          tag: encrypted.tag,
+          updatedAt: nowStr
+        },
+        initialPayload
+      )
 
       // Queue for background sync
       await db.syncQueue.put({

client/src/components/LogEntryEditor.tsx

@@ -33,6 +33,7 @@ import CourseDialInput from './CourseDialInput.tsx'
 import { parseOwmCurrentWeather } from '../utils/openWeatherMap.js'
 import { hashEntryForSigning } from '../utils/entryCanonicalHash.js'
 import { signLogEntry } from '../services/entrySigning.js'
+import { putEntryRecord } from '../utils/entryListCache.js'
 import { getLogbookAccess } from '../services/logbookAccess.js'
 import { PlausibleEvents, trackPlausibleEvent } from '../services/analytics.js'
 import { fetchOpenWeatherCurrent, WeatherApiError } from '../services/weather.js'
@@ -454,14 +455,17 @@ export default function LogEntryEditor({
     const encrypted = await encryptJson(entryData, masterKey)
     const now = new Date().toISOString()
 
-    await db.entries.put({
-      payloadId: entryId,
-      logbookId,
-      encryptedData: encrypted.ciphertext,
-      iv: encrypted.iv,
-      tag: encrypted.tag,
-      updatedAt: now
-    })
+    await putEntryRecord(
+      {
+        payloadId: entryId,
+        logbookId,
+        encryptedData: encrypted.ciphertext,
+        iv: encrypted.iv,
+        tag: encrypted.tag,
+        updatedAt: now
+      },
+      entryData
+    )
 
     await db.syncQueue.put({
       action: 'update',