edit added

backend/internal/db/journal.go

@@ -45,6 +45,33 @@ func (s *JournalStore) InsertImage(ctx context.Context, img domain.JournalImage)
 	return img, err
 }
 
+// GetEntry returns a single entry by ID, verifying ownership.
+func (s *JournalStore) GetEntry(ctx context.Context, entryID, userID string) (domain.JournalEntry, error) {
+	var e domain.JournalEntry
+	err := s.pool.QueryRow(ctx,
+		`SELECT entry_id, user_id, entry_date::text, entry_time::text, title, description, lat, lon, visibility, hashtags, created_at
+		 FROM journal_entries WHERE entry_id = $1 AND user_id = $2`,
+		entryID, userID,
+	).Scan(&e.EntryID, &e.UserID, &e.EntryDate, &e.EntryTime,
+		&e.Title, &e.Description, &e.Lat, &e.Lon, &e.Visibility, &e.Hashtags, &e.CreatedAt)
+	return e, err
+}
+
+// UpdateEntry updates mutable fields of an existing entry.
+func (s *JournalStore) UpdateEntry(ctx context.Context, e domain.JournalEntry) error {
+	if e.Hashtags == nil {
+		e.Hashtags = []string{}
+	}
+	_, err := s.pool.Exec(ctx,
+		`UPDATE journal_entries
+		 SET entry_time = $1, title = $2, description = $3, lat = $4, lon = $5, visibility = $6, hashtags = $7
+		 WHERE entry_id = $8 AND user_id = $9`,
+		e.EntryTime, e.Title, e.Description, e.Lat, e.Lon, e.Visibility, e.Hashtags,
+		e.EntryID, e.UserID,
+	)
+	return err
+}
+
 // ListByDate returns all journal entries for a given date (YYYY-MM-DD), including their images.
 func (s *JournalStore) ListByDate(ctx context.Context, userID, date string) ([]domain.JournalEntry, error) {
 	rows, err := s.pool.Query(ctx,