feat(appearance): colour log rows by QSL status, and fix UDP QSO numbering

New Settings → Appearance section: whole-row colouring in the log grid driven
by QSL / LoTW state, each rule with its own colour from a palette or a free
picker. What Logger32 does, with one difference that matters — the colour is
applied as a 24% tint, not a fill. Logger32's grid is white; this one is dark,
and a saturated user-picked colour behind white text is unreadable at exactly
the moment the operator is scanning for what still needs sending.

Rules are ORDERED and the first match wins, because a contact is usually
several of these at once: one confirmed on LoTW and by card is confirmed, not
"sent, awaiting reply". The order lives in the data so the panel can show the
rules in the order they actually apply, numbered.

The colour is interpolated into a CSS color-mix(), so anything that is not
plainly #rrggbb is refused on the way in and falls back to the default.

Also fixes the QSO number column, which was empty for contacts logged from
WSJT-X: that path inserts through the repo directly and never reached AddQSO.
Rather than chase each of the remaining bulk-insert paths — the POTA hunter
import and the LoTW/QRZ "add what I was missing" passes, which insert OLD
dates and so shift every number after them — the index now checks its length
against a COUNT and rebuilds when they disagree. One indexed count beats
remembering to invalidate in a place that does not exist yet.

frontend/src/lib/i18n.tsx

@@ -114,7 +114,7 @@ const en: Dict = {
   'nav.user': 'User Configuration', 'nav.software': 'Software Configuration', 'nav.hardware': 'Hardware Configuration', 'nav.lists': 'Lists',
   'sec.station': 'Station Information', 'sec.profiles': 'Profiles', 'sec.operating': 'Operating conditions',
   'sec.confirmations': 'Confirmations', 'sec.external': 'External services',
-  'sec.general': 'General', 'sec.email': 'E-mail (SMTP)', 'sec.lookup': 'Callsign Lookup',
+  'sec.general': 'General', 'sec.appearance': 'Appearance', 'appr.enable': 'Colour whole rows by QSL status', 'appr.enableHint': '(in the log grid, like Logger32)', 'appr.orderHint': 'A contact is often several of these at once — the first rule that matches decides the colour.', 'appr.confirmedLotw': 'Confirmed on LoTW', 'appr.confirmedPaper': 'Confirmed by card or eQSL', 'appr.sentWaiting': 'Sent, no answer yet', 'appr.toSend': 'Card requested, not sent', 'appr.custom': 'Pick any colour', 'sec.email': 'E-mail (SMTP)', 'sec.lookup': 'Callsign Lookup',
   'sec.bands': 'Bands', 'sec.modes': 'Modes & default RST', 'sec.cluster': 'DX Cluster',
   'sec.udp': 'UDP integrations', 'sec.database': 'Database', 'sec.autostart': 'Autostart', 'sec.backup': 'Database backup', 'sec.uscounties': 'US Counties',
   'sec.webpublish': 'Web publishing', 'wpub.hint': 'Publishes your log as a file for a website: a standalone HTML page or a CSV, written locally and optionally uploaded by FTP. It is refreshed when you log a QSO and, if you set an interval, on a timer.', 'wpub.enable': 'Publish the log to a file', 'wpub.fileSection': 'The file', 'wpub.format': 'Format', 'wpub.formatHtml': 'HTML page', 'wpub.formatCsv': 'CSV', 'wpub.folder': 'Output folder', 'wpub.browse': 'Browse…', 'wpub.fileName': 'File name', 'wpub.title': 'Page title', 'wpub.titlePh': 'blank = your callsign', 'wpub.count': 'Last N QSOs', 'wpub.every': 'Refresh every', 'wpub.everyHint': 'minutes — 0 = only when a QSO is logged', 'wpub.columns': 'Columns', 'wpub.columnsCount': '{n} of {total} chosen', 'wpub.columnsPick': 'Choose columns…', 'wpub.columnsSearch': 'Search a field…', 'wpub.removeColumn': 'Click to remove', 'wpub.columnsHint': 'Click to add or remove. The order shown here is the order in the file.', 'wpub.ftpEnable': 'Upload by FTP', 'wpub.ftpHost': 'Server / port', 'wpub.ftpUser': 'User', 'wpub.ftpPassword': 'Password', 'wpub.ftpFolder': 'Remote folder', 'wpub.ftpFileName': 'Remote file name', 'wpub.ftpTls': 'Use TLS (FTPS)', 'wpub.publishNow': 'Publish now', 'wpub.testFtp': 'Test connection', 'wpub.lastRun': 'Last run:', 'sec.adifmon': 'ADIF monitor',
@@ -541,7 +541,7 @@ const fr: Dict = {
   'nav.user': 'Configuration utilisateur', 'nav.software': 'Configuration logicielle', 'nav.hardware': 'Configuration matérielle', 'nav.lists': 'Listes',
   'sec.station': 'Informations station', 'sec.profiles': 'Profils', 'sec.operating': "Conditions d'opération",
   'sec.confirmations': 'Confirmations', 'sec.external': 'Services externes',
-  'sec.general': 'Général', 'sec.email': 'E-mail (SMTP)', 'sec.lookup': "Recherche d'indicatif",
+  'sec.general': 'Général', 'sec.appearance': 'Apparence', 'appr.enable': 'Colorer les lignes entières selon le statut QSL', 'appr.enableHint': '(dans le tableau du log, comme Logger32)', 'appr.orderHint': "Un contact est souvent plusieurs de ces états à la fois — la première règle qui correspond décide de la couleur.", 'appr.confirmedLotw': 'Confirmé sur LoTW', 'appr.confirmedPaper': 'Confirmé par carte ou eQSL', 'appr.sentWaiting': 'Envoyé, sans réponse', 'appr.toSend': 'Carte demandée, non envoyée', 'appr.custom': 'Choisir une couleur', 'sec.email': 'E-mail (SMTP)', 'sec.lookup': "Recherche d'indicatif",
   'sec.bands': 'Bandes', 'sec.modes': 'Modes & RST par défaut', 'sec.cluster': 'DX Cluster',
   'sec.udp': 'Intégrations UDP', 'sec.database': 'Base de données', 'sec.autostart': 'Démarrage auto', 'sec.backup': 'Sauvegarde base', 'sec.uscounties': 'Comtés US',
   'sec.webpublish': 'Publication web', 'wpub.hint': "Publie ton journal dans un fichier destiné à un site web : une page HTML autonome ou un CSV, écrit en local et envoyé par FTP si tu le souhaites. Il est rafraîchi à chaque QSO enregistré et, si tu règles un intervalle, périodiquement.", 'wpub.enable': 'Publier le journal dans un fichier', 'wpub.fileSection': 'Le fichier', 'wpub.format': 'Format', 'wpub.formatHtml': 'Page HTML', 'wpub.formatCsv': 'CSV', 'wpub.folder': 'Dossier de sortie', 'wpub.browse': 'Parcourir…', 'wpub.fileName': 'Nom du fichier', 'wpub.title': 'Titre de la page', 'wpub.titlePh': 'vide = ton indicatif', 'wpub.count': 'N derniers QSO', 'wpub.every': 'Rafraîchir toutes les', 'wpub.everyHint': 'minutes — 0 = seulement à chaque QSO', 'wpub.columns': 'Colonnes', 'wpub.columnsCount': '{n} sur {total} choisis', 'wpub.columnsPick': 'Choisir les colonnes…', 'wpub.columnsSearch': 'Chercher un champ…', 'wpub.removeColumn': 'Cliquer pour retirer', 'wpub.columnsHint': 'Clique pour ajouter ou retirer. L ordre affiché ici est celui du fichier.', 'wpub.ftpEnable': 'Envoyer par FTP', 'wpub.ftpHost': 'Serveur / port', 'wpub.ftpUser': 'Utilisateur', 'wpub.ftpPassword': 'Mot de passe', 'wpub.ftpFolder': 'Dossier distant', 'wpub.ftpFileName': 'Nom du fichier distant', 'wpub.ftpTls': 'Utiliser TLS (FTPS)', 'wpub.publishNow': 'Publier maintenant', 'wpub.testFtp': 'Tester la connexion', 'wpub.lastRun': 'Dernière exécution :', 'sec.adifmon': 'Moniteur ADIF',