let $rct = {
    mdl: 'Aufträge',
    or: 'offene Aufträge',
    orr: 'offene Aufträge (4 W)',
    rn: 'Auftragsnummer',
    iov: { all: 'Auftragsübersicht (alle)', '': 'Auftragsübersicht' },
    wk: 'Woche',
    nd: 'Keine Daten gefunden.',
    h: 'Uhr',
    rq1: 'Auftragsdaten werden von MFR abgerufen.\nDer Vorgang kann bis zu 90Sek dauern.',
    rq2: 'Auftragsdaten werden geladen',
    rq1f: 'Die Auftragsdaten von MFR konnten nicht oder nicht schnell genug abgerufen werde.\nMöchten Sie mit den bestehenden Daten trotzdem weitermachen?',
    note1: 'Im Bruttobetrag sind {0} Lohnkosten enthalten (netto {1}). Die darin enthaltene Umsatzsteuer beträgt {2}.',
    note2: 'Bitte beachten Sie, nach §14 Abs. 1 Umsatzsteuergesetz ist diese Rechnung ein Zahlungsbeleg oder eine andere beweiskräftige Unterlage für 2 Jahre nach Ablauf des Kalenderjahres der Ausstellung dieser Rechnung aufzubewahren, soweit nicht aufgrund anderer gesetzlicher Regelungen andere ggf.längere Aufbewahrungsfristen gelten.',
    note3: 'Privathaushalten erstattet das Finanzamt bis zu {0} des Arbeitslohns mit der nächsten Steuererklärung.',
    note4: 'Für bereits erbrachte Arbeiten, Dienstleistungen, Materiallieferungen und getätigte Bestellvorgänge zum oben genannten Bauvorhaben, die sich aus dem mit Ihnen geschlossenen Vertrag ergeben, stellen wir Ihnen vertragsgemäß unsere Akontozahlung in Rechnung. ' +
            'Eine Endabrechnung erhalten Sie als Schlussrechnung nach Abschluss des gesamten Bauvorhabens. Das Ausführungsdatum entnehmen Sie bitte dem Schlusstext dieser Rechnung. Wir danken Ihnen herzlich für das entgegengebrachte Vertrauen und bitten Sie um kurzfristigen Ausgleich der Akontorechnung.',
    note13b: 'Gem. §13b Umsatzsteuergesetz unterliegen Sie der Steuerschuldnerschaft des Leistungsempfängers zur Umsatzsteuer aus dieser Rechnung mit einem Steuersatz von 19%.',
    crI: 'Rechnung erstellen',
    crII: 'Abschlagsrechnung erstellen',
    dII: 'Für eine Abschlagsrechnung darf nur ein Auftrag gewählt werden.',
    dnS: 'Für eine Rechnung muss mindestens ein Auftrag gewählt werden.',
    inv: 'Rechnung',
    invs: 'Rechnungen',
    req: 'Auftrag',
    provP: 'Leistungszeitraum',
    provD: 'Leistungsdatum',
    cP: 'Position ändern',
    iRb: 'Zeile darunter einfügen',
    dR: 'Zeile löschen',
    sV: 'USt festlegen',
    cD: 'Löschen?',
    mR: 'Zeile verschieben',
    ctxM: 'Weitere Aktionen',
    noteToggle: 'Notiz ein-/ausblenden',
    sectionTitleEditTT: 'Auftragsbezeichnung ändern',
    svcPart: 'Service-Anteil',
    vat: 'Umsatzsteuer',
    combP: 'Positionen zusammenfassen',
    toSetP: 'Auf Setpreis umstellen (Positionen ohne Preis)',
    toSetPc: 'Der Set-Preis wird auf die Summe seiner Positionen gesetzt und die Positionen selbst verlieren ihren Preis. Das ist nicht rückgängig zu machen (der Betrag kann danach nur noch manuell geändert werden). Fortfahren?',
    toSetMc: 'Jeder Leistungsauftrag wird zu einer Set-Position mit der Summe als Preis zusammengefasst. Das ist nicht rückgängig zu machen (die Set-Preise können danach nur noch manuell geändert werden). Fortfahren?',
    iSum: 'Zwischensumme',
    dtRel: 'Freigegeben am: ',
    dtCr: 'Erstellt am: ',
    rqV: 'USt des Auftrags?',
    cthd: 'wirklich aus-/einblenden ?',

    cst: { style: 'currency', currency: 'EUR' },
    sts: {
        IsWorkDone: 'Arbeiten erledigt'
        , Closed: 'Auftrag geschlossen'
        , SubcontractorPendingConfirmation: 'Warten auf Bestätigung (Unterauftrag)'
        , Scheduled: 'Geplant'
        , OfferIsRejected: 'Angebot abgelehnt'
        , OfferIsSend: 'Offen (Angebot versandt)'
        , CollaborationWaitingConfirmation: 'Warten auf Bestätigung (Zusammenarbeit)'
        , Released: 'Freigegeben'
        , OfferIsConfirmed: 'Bestätigt'
        , InProgress: 'In Bearbeitung'
        , ReadyForScheduling: 'Zur Planung'
        , Created: 'Erstellt'
        , Rejected: 'Abgebrochen'
        , Invoiced: 'Rechnung gestellt'
        , '-': '-'
    }, invHR: ['Pos.', 'Menge', 'Artikelbezeichnung', 'VK', 'Summe']
    , frm: {
        invoicetitle: 'Titel'
        , invoiceaddress: 'Adresse'
        , loc: 'Leistungsort / Lieferadresse'
        , invoiceemail: 'Email'
        , invoiceemailcc: 'Zusatzempfänger (CC)'
        , provisionperiod: 'Leistungsdatum / -zeitraum'
    }
    /* Tooltip text for each header-field pencil — object+verb phrasing ("<was> <tun>"),
       distinct from frm[] above (used for dialog titles / field labels, which stay short nouns). */
    , frmTT: {
        invoicetitle: 'Rechnungstitel ändern'
        , invoiceaddress: 'Rechnungsempfänger-Adresse ändern'
        , loc: 'Leistungsort oder Lieferadresse ändern'
        , invoiceemail: 'Email-Adresse ändern und zusätzliche Email-Empfänger festlegen'
        , provisionperiod: 'Leistungsdatum oder -zeitraum ändern'
    }
}, $rcol = {
    req: new fields_definition('Auftrag', 'Aufträge', [
        {
            name: 'tags', label: '', type: 'string', dfnc: function (i, x) {
                if ((i || '') !== '') {
                    $(this).aC('tags');
                    i.split(',').forEach((j) => {
                        if (j !== '') {
                            $(this).append($$.sc('tag ' + j.replace(' ', '_').replace('\/', '_').toLowerCase(), j));
                        }
                    })
                }
            }
        },
        { name: 'DateOfCreation', label: 'Datum', type: 'date', title: function (x) { $(this).attr('title', $rct.dtCr + fdt(x.DateOfCreation).ne('-') + '  \n' + $rct.dtRel + fdt(x.DateReleased).ne('-')); } },
        { name: 'CustomerName', label: 'Kunde (Firma)', type: 'string' },
        { name: 'Name', label: 'Auftragsname', type: 'string' },
        { name: 'ExternalId', label: 'Auftragsnummer', type: 'string' },
        { name: 'ParentExtenalId', label: 'PAuftrag', type: 'string' },
        { name: 'InvoiceId', label: 'RNummer', type: 'string', dfnc: function (i, x) { $(this).rwText(i, ' ').find('span').each(function () { $(this).aC('cla').click({ id: $(this).text() }, $inv.jdbn); }) } },
        { name: 'State', label: 'Status', type: 'string' },
        { name: 'WorkDoneAt', label: 'Erledigt am', type: 'date' },
        { name: 'Description', label: 'Beschreibung', type: 'html' }
    ]),
    itm: new fields_definition('Auftragsposition', 'Auftragspositionen', [
        { name: 'NameOrNumber', label: 'Bezeichnung', type: 'string' },
        { name: 'Type', label: 'Typ', type: 'select', required: true, value: 'Text', url: [{ value: 'Text', label: 'Text' }, { value: 'Equipment', label: 'Ausrüstung' }, { value: 'Material', label: 'Material' }, { value: 'Service', label: 'Arbeitsleistung' }], change: function (x) { $req.quantChange.call(this, x); } },
        { name: 'quantityhours', label: 'Anzahl / Menge', type: 'number', precision: '0.01', value: 1, change: function (x) { $inv.quantChange.call(this, x); } },
        { name: 'UnitString', label: 'Einheit', type: 'select', url: ['LFDM', 'Stck', 'Std.', 'QM', 'AW', 'Pauschal'], change: function (x) { $inv.quantChange.call(this, x); } },
        { name: 'net', label: 'EinzelPreis netto', type: 'number', precision: '0.01', value: 0, change: function (x) { $inv.quantChange.call(this, x); }},
        { name: 'net_val', label: 'GesamtPreis netto', type: 'number', precision: '0.01', value: 0 },
        { name: 'vat_val', label: 'GesamtPreis USt', type: 'number', precision: '0.01', value: 0 },
        { name: 'svcnet_val', label: 'Arbeitslohn netto', type: 'number', precision: '0.01', value: 0 },
        { name: 'svcvat_val', label: 'Arbeitslohn USt', type: 'number', precision: '0.01', value: 0 },
        { name: 'net_pos', label: 'Netto', type: 'string' },
        { name: 'bo_pos', label: 'Brutto', type: 'string' },
        { name: 'vat', label: 'USt', type: 'string', value: '19,0%', change: function (x) { $inv.quantChange.call(this, x); } },
        { name: 'Note', label: 'Details', type: 'html', tinymce: true }
    ])
};
let $ict = {
    mdl: 'Rechnungen',
    iov: {
        all: 'Rechnungen (alle)', '': 'Rechnungen (nur fertige)', '#d': 'Rechnungen (nur Entwürfe)', '#u': 'Rechnungen (nur unbezahlt)', '#r': 'Rechnungen (nur angemahnt)', '#a': 'Rechnungen (nur Akonto)', '#c': 'Rechnungen (nur Storno)', '#ru': 'Rechnungen (nur angemahnt + unbez.)'
    },
    uba: ', gesamter Zeitraum)',
    req: 'Auftrag',
    inv: 'Rechnung',
    rem: 'Mahnung',
    in: 'Rechnungsnummer',
    cc: 'Kunde',
    wk: 'Woche',
    nd: 'Keine Daten gefunden.',
    dl: 'Herunterladen', 
    ed: 'Bearbeiten',
    ced: 'Bearbeitung fortsetzen',
    sItm: 'Einzelheiten anzeigen',
    sPay: 'Zahlungen anzeigen',
    cdI: 'Entwurf der Rechnung löschen?',
    rel: 'Neu Laden',
    relm: 'Bitte laden Sie Liste manuell neu, um die Änderungen zu sehen.',
    dsp: 'Rechnung anzeigen',
    storno: 'Storno-Rechnung erstellen',
    credit: 'Gutschrift erstellen',
    remd: 'Mahnung erstellen',
    remdt: 'Mahnung erstellen zur Rechnung {0}',
    remlst: 'Mahnungen anzeigen',
    remdsp: 'Mahnung anzeigen',
    remres: 'Mahnung erneut senden',
    remresc: 'Mahnung {0} wirklich erneut senden?',
    remresr: 'Mahnung {0} wurde erfolgreich versandt.',
    setpyd: 'Bezahlt markieren',
    cpyd: 'Rechnung wirklich als bezahlt markieren?',
    setupd: 'Bezahlt-Markierung aufheben',
    cupd: 'Bezahlt-Markierung wirklich aufheben?',
    ivE: 'Die Email-Adresse ist vermutlich nicht gültig.',
    ivEc: '\nMöchten Sie fortfahren?',
    pna: 'Diese Seite ist in der Vorschau nicht verfügbar',
    tpe: 'Die Anzahl von {0} Seiten wird aktuell nicht unterstützt',
    eis: 'Der Rechnungsentwurf konnte nicht gespeichert werden.',
    iss: 'Zwischenstand speichern.',
    p13b: 'USt -> §13b',
    setm: 'Set-Preisanzeige',
    setmo: {
        setprice: 'Set mit Preis – Positionen ohne Preis',
        setonly: 'Nur Set mit Preis – Positionen ausgeblendet'
    },
    /* user-defined set structure dialog (ADR 0016) */
    setst: 'Set-Struktur bearbeiten',
    setsHint: 'Reihenfolge: Zeile per Drag & Drop an den oberen/unteren Rand einer anderen Zeile ziehen (davor/danach) oder ▲▼ nutzen. Zuordnung: Zeile auf die Mitte eines Sets ziehen (hinein) bzw. auf die Auftragszeile oder "oberste Ebene" (aus dem Set lösen); ◀▶ ändert die Ebene. Sets lassen sich über das Dreieck zu-/aufklappen und auch zugeklappt verschieben – ihre Positionen wandern mit. Änderungen werden sofort übernommen.',
    setsUp: 'Nach oben (innerhalb der Ebene)',
    setsDown: 'Nach unten (innerhalb der Ebene)',
    setsCollapse: 'Set zuklappen',
    setsExpand: 'Set aufklappen',
    setsHR: ['', 'Pos.', 'Typ', 'Menge', 'Bezeichnung', 'Reihenfolge / Ebene'],
    setsRoot: 'Hierher ziehen = aus dem Set lösen (oberste Ebene)',
    setsOut: 'Eine Ebene höher (aus dem Set lösen)',
    setsIn: 'Eine Ebene tiefer (dem vorangehenden Set zuordnen)',
    setsNew: 'Neu:',
    setsInto: 'in',
    setsTop: 'oberste Ebene',
    setsTitle: 'Bezeichnung',
    setsAdd: 'Hinzufügen',
    setsNoTitle: '(ohne Bezeichnung)',
    settyp: { set: 'Set', text: 'Text', title: 'Text', material: 'Material', service: 'Arbeitsleistung', equipment: 'Ausrüstung', other: 'Position', osum: 'Zusammenfassung', intinvoiceallocation: 'Abschlag', intinvoiceallocationdiff: 'Abschlag (offen)' },
    ctp: 'Ansprechpartner festlegen',
    mfr: 'Von MFR neu abrufen',
    rq1: 'Auftragsdaten werden von MFR abgerufen.\nDer Vorgang kann bis zu 90Sek dauern.',
    rq2: 'Auftragsdaten werden geladen',
    iq1: 'Rechnungsdaten werden von MFR abgerufen.\nDer Vorgang kann bis zu 90Sek dauern.',
    iq2: 'Rechnungsdaten werden geladen',
    sis: 'Rechnung als versandt markieren',
    srs: 'Mahnung als versandt markieren',
    sisc: 'Rechnung wirklich als versandt markieren?',
    srsc: 'Mahnung wirklich als versandt markieren?',
    iSt: {dft: 'Entwurf', uns: 'nicht versandt', pyd: 'bezahlt', cc: 'storniert', op: 'offen', due: 'fällig', ovd: 'überfällig', rem: 'angemahnt' },
    rSt: ['', 'Überfällig', '2. Mahnung', '3. Stufe'],
    pSt: { 'a': 'Vollst.', 'p': 'Teilz.' },
    ivT: { i: 'AbschlagsR.', f: 'SchlussR', r: 'Rechnung', c: 'StornoR.' },
    rovlh: 'Übersicht der bisherigen Mahnungen',
    rovl: ['Betreff', 'Betrag', 'Betrag gezahlt', 'fertiggestellt am'],
    remHR: ['Rechnung', 'vom', 'Rechnungsbetrag', 'bereits bezahlt', 'noch offen'],
    // Reminder intro/closing notice texts are backend-authoritative (see FuchsPdf.BuildReminderNotes /
    // $inv.rd.notes) — no client-side copies here.
    translatePaymentTerm: (pt) => (pt || '').replace('wd', ' Werktagen').replace('d', ' Tagen').replace('wk', ' Wochen') || '10 Tagen'
    , payi: { account: 'Konto', name: 'Zahler', text: 'Verw.Zweck', InvoiceID: 'Rechnung', amount: 'Betrag', date: 'Datum', manual: 'Typ'}
}, $invcol = {
    datev: new fields_definition('Rechnung', 'Rechnungen', [
        { name: 'Umsatz (ohne Soll/Haben-Kz)', label: 'Umsatz (ohne Soll/Haben-Kz)', type: 'string' },
        /*{ name: 'EINZELPOS_brutto', label: 'EINZELPOS_brutto', type: 'string' },
        { name: 'EINZELPOS_netto', label: 'EINZELPOS_netto', type: 'string' },*/
        { name: 'vf', label: 'vf', type: 'string' },
        { name: 'Soll/Haben-Kennzeichen', label: 'Soll/Haben-Kennzeichen', type: 'string' },
        { name: 'Konto', label: 'Konto', type: 'string' },
        { name: 'Gegenkonto', label: 'Gegenkonto', type: 'string' },
        { name: 'BU-Schlüssel', label: 'BU-Schlüssel', type: 'string' },
        { name: 'Belegdatum', label: 'Belegdatum', type: 'string' },
        { name: 'Belegfeld 1', label: 'Belegfeld 1', type: 'string' },
        { name: 'Belegfeld 2', label: 'Belegfeld 2', type: 'string' },
        { name: 'Buchungstext', label: 'Buchungstext', type: 'string' }
    ])
    , inv: new fields_definition('Rechnung', 'Rechnungen', [
        { name: 'invstatus', label: 'Status', type: 'select', url: $ict.iSt },
        { name: 'balance', label: 'Umsatz', type: 'string', dtype: 'currency' },
        { name: 'CustomerName', label: 'Kunde', type: 'string' },
        { name: 'InvoiceId', label: 'RNummer', type: 'string' },
        { name: 'InvoiceType', label: 'Typ', type: 'select', url: $ict.ivT },
        //{ name: 'requestcount', label: 'Anz. Aufträge', type: 'string', dtype: 'num' },
        { name: 'request', label: 'Auftrag', type: 'string', dtype: 'num' },
        /*{ name: 'EINZELPOS_brutto', label: 'EINZELPOS_brutto', type: 'string', dtype: 'currency' },
        { name: 'EINZELPOS_netto', label: 'EINZELPOS_netto', type: 'string', dtype: 'currency' },*/
        { name: 'vat', label: 'MwSt', type: 'string', dtype: 'num' },
        { name: 'deb_cred', label: 'Soll/Haben', type: 'string' },
        { name: 'customer', label: 'Konto', type: 'string', dtype: 'num' },
        { name: 'contra_account', label: 'Gegenkonto', type: 'string', dtype: 'num' },
        { name: 'Belegdatum', label: 'Belegdatum', type: 'date' },
        { name: 'reminderstatus', label: 'MahnStatus', type: 'select', url: $ict.rSt },
        { name: 'reminder', label: '# Mahnungen', type: 'integer' },
        { name: 'Buchungstext', label: 'Buchungstext', type: 'string' },
        { name: 'Payment', label: 'Zahlung', type: 'string' }
        /*{ name: 'PaymentStatus', label: 'Zahlungsstatus', type: 'select', url: $ict.pSt}*/

    ])
    , rem: new fields_definition('Zahlungserinnerung', 'Zahlungserinnerung', [
        { name: 'amount', label: 'Rechnungsbetrag', type: 'number', precision: '0.01', value: 1 },
        { name: 'amount_payed', label: 'bereits bezahlt', type: 'number', precision: '0.01', value: 1 }
    ])
    , rem2: new fields_definition('Zahlungserinnerung', 'Zahlungserinnerung', [
        { name: 'DocumentName', label: 'Name', type: 'string' },
        { name: 'subject', label: 'Betreff', type: 'string' },
        { name: 'DateSent', label: 'Versanddatum', type: 'date' },
        { name: 'status', label: 'Status', type: 'string' },
        //{ name: 'IsDraft', label: 'Entwurf', type: 'boolean' },
        { name: 'amount_open', label: 'offener Betrag', type: 'number', precision: '0.01' },
        { name: 'InvoiceId', label: 'RNummer', type: 'string' },
        //{ name: 'InvoiceDocumentName', label: 'RechnungName', type: 'string' }
    ])
    , rid: new fields_definition('Zahlungserinnerung', 'Zahlungserinnerung', [
        { name: 'type', label: 'Typ', type: 'select', url: [['f', 'einfache Zahlungserinnerung'],[ 'm', 'Mahnung'],[ 'l', 'letzte Mahnung']], required: true},
        { name: 'level', label: 'Stufe', type: 'select', url: [['1', 'Stufe 1'], ['2', 'Stufe 2'], ['3', 'Stufe 3'], ['4', 'Stufe 4'], ['5', 'Stufe 5'], ['6', 'Stufe 6']], required: true }
    ])
    , ctp: new fields_definition('Ansprechpartner', 'Ansprechpartner', [
        { name: 'name', label: 'Name', type: 'string' },
        { name: 'email', label: 'Email', type: 'string' }
    ])
};

let gi = (n, c) => $$.sc('glyphicon glyphicon-' + n).aC(c);
let $inv = {}, $req = {
    init2: function (type, options) {
        type = type || 'inv';
        options = options || {};
        $ocms.getScript([
            //{ script: 'web/jstree.min.js', css: 'web/jstree.min.css', condition: typeof $.fn.jstree !== 'function' }
            //, { script: 'web/jquery.qtip.min.js', css: 'web/jquery.qtip.min.css', condition: typeof $.fn.qtip !== 'function' }
            //, { script: 'web/typeahead.min.js', css: '', condition: typeof $.fn.typeahead !== 'function' }
            //, { script: 'web/fullcalendar.min.js', module: 'FullCalendar', css: 'web/fullcalendar.min.css', condition: typeof FullCalendar !== 'object' }
        ], function () {
            //FullCalendar = $vm.FullCalendar;
            $req.init3(type, options);
        });
    }, init3: async function (type, options) {
        let cf = $fis.cf(true), lf = $fis.lf(true);
        $('#topbar').ocmsmenu([]); //{ lbl: 'home', fnc: $inv.init3 }
        $('#activemodule').text($rct.mdl);
        await $fis.prepAuth('fds_req,fds_inv,fds_reminder');
        let pa = [(async () => {
            if ($fis.isAuth('fds_req', 1) === true) {
                $req.prepLst('');
                lf.aC('fix');  //initially should be shown - for convenience
            }
        })(), new Promise((resolve, reject) => {
            lf.find('div.oreq2').aC('selected');
            $req.renderreq(fdt(new Date(), 'yy-MM-dd'), 'r');
            resolve();
        })];
        await Promise.all(pa);
    }, prepLst: function (includes) {
        let td = new Date();
        let lf = $fis.lf(true).ldng(1), sd = new Date('2021-01-01');
        let frm = $fis.frm_list();
        frm.IN(function () { });
        let opn = $$.dc('mth oreq', lf).text($rct.or).click(function (ev) {
            let mth = $(this);
            ev.stopPropagation();
            mth.siblings().rC('selected');
            if (mth.is('.selected') === true) {
                mth.tC('selected');
                $req.renderreq(fdt(new Date(), 'yy-MM-dd'), 'o');
            }
            mth.aC('selected');
        });
        let opnr = $$.dc('mth oreq2', lf).text($rct.orr).click(function (ev) {
            let mth = $(this);
            ev.stopPropagation();
            mth.siblings().rC('selected');
            if (mth.is('.selected') === true) {
                mth.tC('selected');
                $req.renderreq(fdt(new Date(), 'yy-MM-dd'), 'r');
            }
            mth.aC('selected');
        });
        let osb = $$.i({ placeholder: $rct.rn }).appendTo($$.dc('mth oreqn', lf)).enterKey(function (ev) {
            let mth = $(this), v = mth.val() ||'';
            ev.stopPropagation();
            mth.parent().siblings().rC('selected');
            if (v.length > 3) {
                mth.parent().aC('selected');
                $req.renderreq('n:' + v, 's');
                mth.val('');
            }
        });
        lf.append('<hr />');
        let mthl = $$.dc('mthl', lf), thisyear = td.getFullYear(), thismonth = td.getMonth() + 1;
        for (let tyr = sd.getFullYear(); tyr <= thisyear; tyr++) {
            let yr = $$.dc('yr').prependTo(mthl).text($rct.iov[includes] + ' - ' + tyr.toString()).toggleClass('selected', tyr === thisyear);
            yr.click({
                yr: tyr
            }, function (ev) {
                ev.stopPropagation();
                yr.siblings().rC('selected');
                yr.aC('selected');
            });
            let mfrm = $$.dc('mfrm', yr);
            for (let tmt = 0; tmt < (tyr !== thisyear ? 12 : thismonth); tmt++) {
                sd = new Date(tyr, tmt, 1);
                let mth = $$.dc('mth').prependTo(mfrm).text($rct.iov[includes] + ' - ' + fdt(sd, 'MMM yyyy'));
                mth.click({
                    yr: tyr, mt: tmt
                }, function (ev) {
                    ev.stopPropagation();
                    mth.siblings().rC('selected');
                    if (mth.is('.selected') === true) {
                        mth.tC('selected');

                        let tgt = fdt(new Date(ev.data.yr, ev.data.mt, 1), 'yy-MM-dd');
                        $req.renderreq(tgt, 'm');
                    }
                    mth.aC('selected');
                });

                let fwf = getMonday(sd), rd = fwf, lwf = new Date(sd);
                lwf.setMonth(lwf.getMonth() + 1);
                lwf.setDate(0);
                lwf = getMonday(lwf);
                let wfrm = $$.dc('wfrm', mth);
                while (rd <= lwf) {
                    let wk = $$.dc('wk', wfrm).text(($rct.wk || 'W') + ' ' + fdt(rd, 'dd.MM.yy'));
                    wk.click({
                        rd: new Date(rd)
                    }, function (ev) {
                        ev.stopPropagation();
                        let tgt = fdt(ev.data.rd, 'yy-MM-dd');
                        $req.renderreq(tgt, 'w');
                        mth.siblings().rC('selected').find('.wk').rC('selected');
                        mth.aC('selected').find('.wk').rC('selected');
                        wk.aC('selected');
                    });
                    let wkdl = $$.dc('wkdl', wk).append($$.sc('ico glyphicon glyphicon-compressed'));
                    if ($fis.isAuth('fds_inv', 2) === true) {
                        wkdl.click({
                            rd: new Date(rd)
                        }, function (ev) {
                            ev.stopPropagation();
                            let tgt = fdt(ev.data.rd, 'yy-MM-dd');
                            $req.downloadzip.call(tgt, 'w');
                        });
                    }
                    rd.setDate(rd.getDate() + 7);
                }
            }
        }
        lf.ldng(0);
    }, renderreq: function (tgt, mode) {
        let invlst = $fis.frm_list().ldng(1), invfrm = $$.dc('invfrm', invlst).aC('md' + mode);
        let lf = $fis.lf();
        $ocms.postXT({
            url: $ocms.url('req/reql'), data: { mode: mode, tgt: tgt }, success: (response) => {
                lf.rC('fix').aC('hd');
                $$.dc('ovhd', invfrm).append($$.s(response.admin.title)).appendIf($$.sc('note', response.admin.note), ne(response.admin.note, '') !== '');
                let ts = $$.tblset({}, invfrm), fd = $rcol.req;
                let thr = $$.tr(ts.hd), haux = $$.th(thr);
                $.each(fd.fields || [], (ci, cx) => {
                    $$.th(thr).text(cx.label);
                    if (cx.name === 'vat') {
                        $$.th(thr);
                    }
                });
                let ctr = 0, cst = false;
                $.each(response.requests || [], (ri, rw) => {
                    if (ctr > 0 && ctr !== rw.ParentServiceRequestId) {
                        cst = !cst;
                    }
                    let tr = $$.tr(ts.bdy).tC('alt', cst);
                    ctr = rw.ParentServiceRequestId;
                    tr.click(function () {
                        lf.rC('fix').aC('hd');
                        tr.tC('selected').siblings().rC('selected').find('td.av').rC('av');
                        tr.find('td.av').rC('av');
                    });
                    tr.tC('child', rw.isChild);
                    let raux = $$.td(tr, { class: 'raux' });
                    if (bool(rw.open, false) === true) {
                        $$.dc('ihd ilbtn', raux).append(gi('eye-close', 'ico')).click({ id: rw.Id }, $req.tHd);
                    }
                    $$.dc('iitm ilbtn', raux).append(gi('list', 'ico')).click({ id: rw.Id }, $req.showitm);
                    if ($fis.isAuth('fds_inv', 2) === true) {
                        $$.dc('invc ilbtn', raux).append(gi('edit', 'ico')).click({ id: rw.Id }, $inv.cInv);
                    }
                    $.each(fd.fields || [], (ci, cx) => {
                        let td = $$.td(tr).aC(cx.dtype), val = rw[cx.name];
                        if (typeof cx.dfnc === 'function') {
                            cx.dfnc.call(td, val, rw);
                        } else {
                            switch (cx.type || '') {
                                case 'date':
                                    td.text(fdt(rw[cx.name], 'dd.MM.yy'));
                                    break;
                                case 'datetime':
                                    td.text(fdt(rw[cx.name]));
                                    break;
                                case 'html':
                                    td.append($$.dc('ctw').html(val));
                                    td.append($$.dc('ttip').html(val));
                                    break;
                                default:
                                    td.text(rw[cx.name]);
                            }
                        }
                        switch (cx.name || '') {
                            case 'State':
                                td.text($rct.sts[val || '-']);
                                break;
                            case 'Name':
                                td.aC(cx.name.toLowerCase());
                                break;
                            case 'vat':
                                $$.sel().appendTo($$.td(tr, { class: 'vsel' })).click(function (ev) { ev.stopPropagation(); }).append([$$.opt('19,0 %', '19,0 %'), $$.opt('16,0 %', '16,0 %'), $$.opt('0,0 %', '0,0 %')]).val(rw[cx.name]).change().change({ frm: invfrm, tgt: tgt, mode: mode, id: rw.Id, td: td }, $req.setvat);
                                td.tC('hl', rw[cx.name].substr(0, 2) !== '19').click(function (ev) {
                                    ev.stopPropagation();
                                    $(this).tC('av');
                                });
                                break;
                            case 'balance':
                                td.aC('sh_' + (rw.SollHaben || '').toLowerCase());
                                break;
                            case 'InvoiceId':
                                td.aC('keep');
                                break;
                        }
                        switch (typeof cx.title) {
                            case 'function':
                                cx.title.call(td, rw);
                                break;
                            case 'string':
                                td.attr('title', cs.title);
                        }
                    });
                });
            }, complete: () => { invlst.ldng(0); }
        });
    }, tHd: function (ev) {
        let tr = $(this).closest('tr');
        ev.stopPropagation();
        if (tr.is('.selected') === false) {
            return;
        } else if (confirm($rct.cthd)){
            $ocms.postXT({
                url: $ocms.url('req/rthd'), data: { id: ev.data.id }, success: (response) => {
                    if (response.id === ev.data.id && bool(response.visible, true) === false) {
                        if (tr.is('.tbhd') === false) {
                            setTimeout(() => { tr.filter('.tbhd').remove(); }, 15000);  // by the filter, it can be prevented by removing the class
                        }
                        tr.aC('tbhd');
                    } else if (response.id === ev.data.id) {
                        tr.rC('tbhd');
                    }
                }
            });
        }
    }, showitm: function (ev) {
        let tr = $(this).closest('tr');
        ev.stopPropagation();
        if (tr.is('.selected') === false) {
            return;
        }
        let fr = $$.dc('rfrm').ldng(1);
        $ocms.postXT({
            url: $ocms.url('req/pget'), data: { id: ev.data.id }, success: (response) => {
                $ocms.postXT({
                    url: $ocms.url('req/get'), data: { id: ev.data.id, mode: 'ful' }, success: (response) => {
                        let rqa = {};
                        if ((response.requests || []).length < 1) {
                            fr.text($rct.nd);
                        } else {
                            let rq = $$.dc('srq', fr);
                            let rif = $$.tblset({ class: 'if' }, rq);
                            $.each(response.requests || [], function (ri, rx) {
                                if (ri > 0) {
                                    $$.tr(rif.bdy).aC('sep').append($$.td({ colspan: 6 }));
                                }
                                let rtr = $$.tr(rif.bdy).aC('title'), cl = $rcol.itm.lbl();
                                let worknotes = $inv.worknotes(rx);
                                $$.td(rtr, { colspan: 6 }).append([$$.s($rcol.req.label_sng), $$.sc('eid', rx.ExternalId), $$.sc('nme', fdt(rx.WorkDoneAt,'dd.MM.yy') + ': ' + worknotes.ne(rx.Name))]);
                                let sdh = $$.tr(rif.bdy).aC('shd').append([$$.td(), $$.td(cl.NameOrNumber), $$.td(cl.Type), $$.td(cl.net_pos), $$.td(cl.bo_pos), $$.td(cl.vat)]);  /*  header row for items */
                                $.each(rx.items || [], (ii, ix) => {
                                    let sid = ix.ServiceRequestId;
                                    let itr = $$.tr(rif.bdy, { id: 'itm' + ix.Id }).aC(ix.Type);
                                    $$.td(itr).aC('ico');
                                    $$.td(itr).text(ix.NameOrNumber);
                                    $$.td(itr).text(ix.Type);
                                    $$.td(itr).aC('currency').text(ix.net_pos);
                                    $$.td(itr).aC('currency').text(ix.bo_pos);
                                    $$.td(itr).aC('num').text(ix.vat);
                                });
                            });
                        }
                    }, error: () => {
                        fr.text($t.t12);
                    }, complete: () => {
                        fr.ldng(0);
                    }
                });
            }, error: () => {
                fr.text($t.t12);
                fr.ldng(0);
            }
        });
        $ocms.dlg(fr, { width: 1000 });
    }
}
let $$req = { init2: $req.init2, auth: {} };
export default $$req;

$inv.cInv = function (ev) {
    let tr = $(this).closest('tr');
    ev.stopPropagation();
    if (tr.is('.selected') === false) {
        return;
    } else if ($fis.isAuth('fds_inv', 2) === false) {
        return;
    }
    $inv.cInv2({ id: ev.data.id });
};
$inv.rMn = (o) => {
    let m = [{ lbl: $ict.req, itm: [] }];
    if (bool(o, false) === true && $fis.isAuth('fds_inv', 2) === true) {
        Array.prototype.push.apply(m[0].itm, [
            { lbl: $rct.crI, fnc: $inv.ccInv, data: { typ: 'r' } }
            , { lbl: $rct.crII, fnc: $inv.ccInv, data: { typ: 'i' } }
        ]);
    }
    m.push({ lbl: $ict.rel, fnc: $inv.rReload });
    return $('#topbar').ocmsmenu(m);
};
$inv.iMnr = (ix) => {
    let f = booln(ix.isFinal, true), id = ix.Id, fds = booln(ix.fds, false);
    let m = [
        { glyph: 'glyphicon-menu-left', fnc: () => { $fis.frm_edit().remove(); } },
        { lbl: $ict.inv, itm: [] }, { lbl: $ict.rem, itm: [] }
    ];
    if (f === false && $fis.isAuth('fds_inv', 2) === true) {
        m[1].itm.push({ lbl: $ict.ced, fnc: $inv.clCntInv });
    } else if ($fis.isAuth('fds_inv', 1) === true) {
        m[1].itm.push({ lbl: $ict.dsp, fnc: () => $inv.disp(id, 'inv') })
    }
    if (fds === true && f === true && $fis.isAuth('fds_inv', 2) === true) {
        m[1].itm.push({ lbl: $ict.storno, fnc: () => $inv.storno(id, fds) });
        m[1].itm.push({ lbl: $ict.credit, fnc: () => $inv.credit(id, fds) });
    }
    if (f === true && $fis.isAuth('fds_reminder', 2) === true) {
        m[2].itm.push({ lbl: $ict.remd, fnc: () => $inv.ccRem(id, ix.InvoiceId) });
        m[2].itm.push({ lbl: $ict.remlst, fnc: () => $inv.dspRem(id) });
    }
    if (f === true && $fis.isAuth('fds_reminder', 2) === true && booln(ix.IsSent, false) === false) {
        m[2].itm.push({ lbl: $ict.srs, fnc: () => $inv.srs(id) });
    }
    m.push({ lbl: $ict.rel, fnc: $inv.rReload });
    return $('#topbar').ocmsmenu(m);
};
$inv.iMn = (ix) => {
    let f = booln(ix.isFinal, true), id = ix.Id, fds = booln(ix.fds, false);
    let m = [{ glyph: 'glyphicon-menu-left', fnc: () => { $fis.frm_edit().remove(); } },
        { lbl: $ict.inv, itm: [] }, { lbl: $ict.rem, itm: [] }
    ];
    if (f === false && $fis.isAuth('fds_inv', 2) === true) {
        m[1].itm.push({ lbl: $ict.ced, fnc: () => { $inv.cntInv({ id: id }); } });
    } else if ( $fis.isAuth('fds_inv', 1) === true) {
        m[1].itm.push({ lbl: $ict.dsp, fnc: () => $inv.disp(id, 'inv') })
    }
    if ($fis.isAuth('fds_inv', 2) === true) {
        m[1].itm.push({ lbl: $ict.storno, fnc: () => $inv.storno(id, fds) })
        m[1].itm.push({ lbl: $ict.credit, fnc: () => $inv.credit(id, fds) });
    }
    if (f === true && booln(ix.IsPayed, false) === false) {
        if ($fis.isAuth('fds_reminder', 2) === true) {
            m[2].itm.push({ lbl: $ict.remd, fnc: () => $inv.ccRem(id, ix.InvoiceId) });
        }
        if ($fis.isAuth('fds_inv', 2) === true) {
            m[1].itm.push({ lbl: $ict.setpyd, fnc: () => $inv.setPyd(id) });
        }
    } else if (f === true && booln(ix.IsPayed, false) === true && (ix.PaymentStatus || '') === 'm') {
        if ($fis.isAuth('fds_inv', 2) === true) {
            m[1].itm.push({ lbl: $ict.setupd, fnc: () => $inv.setUpd(id) });
        }
    }
    if ($fis.isAuth('fds_reminder', 2) === true) {
        m[2].itm.push({ lbl: $ict.remlst, fnc: () => $inv.dspRem(id) });
    }
    if (f === true && $fis.isAuth('fds_inv', 2) === true && booln(ix.IsSent, false) === false) {
        m[1].itm.push({ lbl: $ict.sis, fnc: () => $inv.sis(id) });
    }
    if (fds === false) {
        m[1].itm.push({ lbl: $ict.mfr, fnc: () => $inv.mfrrel(id) });
    }
    return $('#topbar').ocmsmenu(m);
}
/* Menu option CSV builder: 'setm' (Set-Preisanzeige) is only offered while the invoice has not
   yet been explicitly switched to a set-display mode (admin.setmode empty/undefined) — once set,
   changing it again is not supported (the user edits the line items directly instead); it
   reappears only if 'Änderungen verwerfen' reverts to a DB state that was never switched. */
$inv.emOpt = (admin) => 'iss,p13b,ctp,setst' + (((admin || {}).setmode || '') === '' ? ',setm' : '');
$inv.eM = (r, re, opt) => {
    let m = [];
    if (booln(r, false) === true || booln(re, false) === true) {
        m.push({ glyph: 'glyphicon-menu-left', fnc: () => { $fis.lf(true); $fis.frm_edit().remove(); } });
    }
    if ((opt || '').split(',').includes('iss') === true) {
        m.push({ lbl: $ict.iss, fnc: $inv.ssave });
    }
    if ((opt || '').split(',').includes('ctp') === true) {
        m.push({ lbl: $ict.ctp, fnc: $inv.sctp });
    }
    if ((opt || '').split(',').includes('p13b') === true) {
        m.push({ lbl: $ict.p13b, fnc: $inv.sp13b });
    }
    if ((opt || '').split(',').includes('setm') === true) {
        m.push({ lbl: $ict.setm, fnc: $inv.ssetmode });
    }
    if ((opt || '').split(',').includes('setst') === true) {   /* user-defined set structure dialog (ADR 0016) */
        m.push({ lbl: $ict.setst, fnc: () => $inv.sets.open() });
    }
    if ((opt || '').split(',').includes('iss') === true) {  /* backend-authoritative draft (ADR 0006) */
        m.push({ lbl: 'Änderungshistorie', fnc: () => $inv.d.history() });
        m.push({ lbl: 'Änderungen verwerfen', fnc: () => $inv.d.discard() });
    }
    if (booln(r, false) === true) {
        m.push({ lbl: $ict.rel, fnc: $inv.rReload });
    }
    return $('#topbar').ocmsmenu(m);  /* empty Array => empty menu */
};
/* ── Backend-authoritative draft editing controller (ADR 0006/0007) ───────────
   The server holds the truth for an invoice draft in an in-memory session; this
   object seeds it, sends single edits as deltas, and renders the totals footer +
   validation from the authoritative server state. It is invoice-only: reminders
   never obtain a token (invSumUpdate, the seed trigger, is only bound for invoices),
   so they keep the legacy stateless flow untouched. */
$inv.d = {
    tbl: () => $('div.invoice_layout table.invi'),
    layout: () => $('div.invoice_layout'),
    token: function () { return $inv.d.tbl().data('dtoken') || ''; },
    /* Hash each assembled block so only genuinely-changed blocks are sent as deltas. */
    hashes: function () {
        let bai = $inv.d.tbl().data('bai') || [], h = {};
        $.each(bai, (i, b) => { h[(b.Id || '').toString()] = JSON.stringify(b); });
        return h;
    },
    /* Seed the authoritative server session from the assembled editor payload. Called
       once from invSumUpdate on open; thereafter the backend is the source of truth.
       The in-flight ajax promise is stashed on 'dseedpromise' so a delta sent (e.g. via
       a context-menu action) before seeding has actually completed can wait for the token
       instead of silently no-op'ing (see $inv.d.sync). */
    seed: function (payload) {
        let l = $inv.d.layout(); l.aC('freeze');
        let p = $ocms.postXT({
            url: $ocms.url('inv/dopen'), data: { payload: JSON.stringify(payload) }, success: (r) => {
                $inv.d.tbl().data('dtoken', r.token).data('dver', r.version).data('dhashes', $inv.d.hashes()).data('dorder', $inv.d.order());
                $fis.draft.bind(r.token, {
                    onReady: () => $inv.d.refresh(),
                    onExpiring: (s) => $inv.d.warnExpiry(s),
                    onClosed: (reason) => $inv.d.closed(reason)
                });
                $inv.d.refresh();
            }, error: () => { l.rC('freeze'); }, complete: () => { $inv.d.tbl().removeData('dseeding').removeData('dseedpromise'); }
        });
        $inv.d.tbl().data('dseedpromise', p);
        return p;
    },
    /* Re-fetch the authoritative state and render the totals footer + validation from it. */
    refresh: function (cb) {
        let t = $inv.d.token(); if (t === '') { return; }
        $ocms.postXT({
            url: $ocms.url('inv/dstate'), data: { token: t }, success: (state) => {
                $inv.d.applyState(state); if (typeof cb === 'function') { cb(state); }
            }, error: (xhr) => { if (xhr && xhr.status === 410) { $inv.d.closed('expired'); } },
            complete: () => { $inv.d.layout().rC('freeze'); }
        });
    },
    applyState: function (state) {
        let tbl = $inv.d.tbl(); if (tbl.length < 1) { return; }
        /* Concurrent refreshes (one per flushed block plus one for a follow-up delta such as
           item.setprice, and SignalR draftReady on top) can have their dstate responses arrive
           out of order. Applying a response older than the version already rendered would
           silently roll back a just-applied server-side mutation (e.g. a set-price conversion
           reverting to its pre-conversion 0/individually-priced state) — so stale responses are
           dropped here instead of rendered. */
        let curVer = tbl.data('dver');
        if (typeof curVer === 'number' && typeof state.version === 'number' && state.version < curVer) {
            return;
        }
        tbl.data('dver', state.version).data('serverSums', state.sums).data('dstate', state);
        $inv.d.footer(tbl, state.sums || {}, state.admin || {});
        $inv.d.notes(state.notes || []);
        $inv.d.validation(state.validation || []);
        $inv.d.applyItems(tbl, state.req || []);
        $inv.d.applySetDisplay(tbl, state.setDisplay || {});
        if ($inv.sets && $inv.sets.isOpen()) { $inv.sets.render(state); }   /* the set-structure dialog is a view of the same state (ADR 0016) */
        /* Keep the menu's "Set-Preisanzeige" entry in sync with the authoritative admin.setmode:
           hides it right after a mode switch, and restores it if a discard reverted the draft to
           a DB state that was never switched (ADR 0006 backend-authoritative refresh). */
        $inv.eM(false, true, $inv.emOpt(state.admin || {}));
    },
    /* Renders the backend-authoritative notice paragraphs (ADR: notice texts are
       backend-authoritative) exactly as FuchsPdf.BuildInvoiceNotes emits them for the PDF,
       so the online editor always shows precisely what will be printed. */
    notes: function (notes) {
        let frm = $inv.d.layout(); if (frm.length < 1) { return; }
        let box = frm.children('.dnotes');
        if (box.length < 1) { box = $$.dc('dnotes'); frm.append(box); }
        box.empty();
        (notes || []).forEach((n) => $$.dc('dnote').aC(n.style || 'InvoiceNotes').text(n.text));
    },
    /* Push the server's authoritative position numbers back onto the rendered rows so the online
       editor and the PDF preview always agree (the server numbers priced lines continuously; the
       browser must not keep its own numbering). Only the position cell is touched — no re-render. */
    /* Reconciles each block's rendered rows against the authoritative server line list
       (`req[].itm`, the co shape). The server may not only change a line's values but also
       ADD lines (the block set row inserted by "Set mit Preis"/block.setprice) and REMOVE lines
       ("Nur Set mit Preis"/block.setonly), and reorder them — the browser never computes any of
       that (ADR 0006/0008/0009), it just mirrors the server. For each server line: patch/insert
       the matching row, preserving null price fields verbatim (ADR 0009: null = empty cell, kept
       distinct from 0). Rows the server no longer lists are removed; order follows the server.
       Position numbers, net/VAT and the set-row emphasis all come from rrw off the mirrored data. */
    applyItems: function (tbl, req) {
        let val = (x) => (x === undefined ? null : x);   // JSON null stays null; absent -> null
        (req || []).forEach((b) => {
            if (!b) { return; }
            let bid = (b.Id || '').toString(); if (bid === '') { return; }
            let bdy = tbl.children('tbody').filter((i, e) => (($(e).data() || {}).Id || '').toString() === bid).first();
            if (bdy.length < 1) { return; }
            let itms = b.itm || [], serverIds = {};
            let title = bdy.find('tr.title').first();
            let prev = title.length ? title : null;
            itms.forEach((co) => {
                let id = (co.id || '').toString(); if (id === '') { return; }
                serverIds[id] = true;
                let rw = bdy.find('#itm' + id).first(), isNew = rw.length < 1;
                if (isNew) { rw = $$.tr(bdy, { id: 'itm' + id, class: 'itm' }); }
                let dta = rw.data() || {};
                let changed = isNew || (dta.Type || '') !== (co.typ || '')
                    || dta.net !== val(co.v) || dta.net_val !== val(co.vt) || dta.vat_val !== val(co.vv)
                    || dta.svcnet_val !== val(co.vs) || dta.svcvat_val !== val(co.vsv)
                    || (dta.position || '') !== (co.p != null ? co.p : '')
                    || (dta.lvl || 0) !== (co.lvl || 0) || (dta.SetItmId || null) !== (co.SetItmId != null ? co.SetItmId : null);
                $.extend(dta, {
                    Id: id, Type: co.typ,
                    net: val(co.v), net_val: val(co.vt), vat_val: val(co.vv),
                    svcnet_val: val(co.vs), svcvat_val: val(co.vsv),
                    vat: co.vat, position: (co.p != null ? co.p : ''),
                    SetItmId: (co.SetItmId != null ? co.SetItmId : null),
                    lvl: (co.lvl || 0)                                       /* nesting depth (ADR 0016) — rendered as an indent */
                });
                if (isNew) { $.extend(dta, { htmltext: co.t, quantity: co.q }); }   // text only for server-created rows (e.g. the set row)
                rw.data(dta);
                if (prev) { if (rw.prev()[0] !== prev[0]) { rw.insertAfter(prev); } }  // keep server order, but don't churn already-ordered rows
                else if (bdy.children().first()[0] !== rw[0]) { bdy.prepend(rw); }
                prev = rw;
                if (changed) { $inv.rrw.call(rw); }
            });
            bdy.find('tr.itm').each((i, tr) => {
                let id = (($(tr).data() || {}).Id || '').toString();
                if (id !== '' && !serverIds[id]) { $(tr).remove(); }                 // dropped server-side (block.setonly)
            });
        });
    },
    /* Applies the backend-authoritative set-pricing display flags (see BuildSetDisplay /
       InvoiceSetPricing) onto the rendered rows: blanks the price/total cells for lines the
       server says should show no price (set members in SetPrice/SetOnly mode), and emphasises
       the set header line — so the online editor always shows exactly what the PDF will print,
       without duplicating the pricing rules client-side. Rows not present in the map (no set in
       that block, or standalone items) are left untouched. */
    applySetDisplay: function (tbl, setDisplay) {
        tbl.find('tr.itm').each((i, tr) => {
            let rw = $(tr), dta = rw.data() || {}, id = (dta.Id || '').toString();
            if (id === '' || !Object.prototype.hasOwnProperty.call(setDisplay, id)) { return; }
            let flags = setDisplay[id] || {};
            rw.tC('sethdr', bool(flags.h, false));
            if (bool(flags.p, true) === false) {
                rw.find('td.currency').text('');
            }
        });
    },
    /* Send one change to the server; the draftReady signal and this success both refresh.
       Returns the underlying ajax promise so callers that must not race a follow-up delta
       against this one (e.g. $inv.toSetPrice after a flush) can chain on it.
       If the initial seeding (inv/dopen) is still in flight (no token yet, but a
       'dseedpromise' is pending), the delta previously vanished silently — the user saw no
       network activity at all when clicking a context-menu action right after opening the
       editor. Now the delta waits for the seed to finish and retries against the freshly
       issued token instead of being dropped. */
    sync: function (delta) {
        let t = $inv.d.token();
        if (t === '') {
            let seeding = $inv.d.tbl().data('dseedpromise');
            if (seeding) { return $.when(seeding).then(() => $inv.d.sync(delta)); }
            return $.when();
        }
        $inv.d.layout().aC('freeze');
        return $ocms.postXT({
            url: $ocms.url('inv/dpatch'), data: { token: t, delta: JSON.stringify(delta) },
            success: () => { $inv.d.refresh(); },
            error: (xhr) => { $inv.d.layout().rC('freeze'); if (xhr && xhr.status === 410) { $inv.d.closed('expired'); } }
        });
    },
    /* The current section id sequence (used to detect a reorder that changes no block content). */
    order: function () { return (($inv.d.tbl().data('bai')) || []).map((b) => (b.Id || '').toString()); },
    /* Diff the freshly-rebuilt blocks against the last-synced state and send only the
       changed/removed blocks as granular block.replace / block.remove deltas. A pure section
       reorder (same blocks, new sequence) changes no block hash, so it is sent separately as a
       block.order delta; the server reorders the cache, renumbers positions and pushes them back.
       No early return on an empty token here: sync() itself waits for an in-flight seed
       (dseedpromise) instead of silently dropping the delta, so edits made in the brief window
       before seeding completes are not lost. */
    syncChanged: function (tbl) {
        let bai = tbl.data('bai') || [], prev = tbl.data('dhashes') || {}, next = {}, changed = [], removed = [], pending = [];
        $.each(bai, (i, b) => { let id = (b.Id || '').toString(), h = JSON.stringify(b); next[id] = h; if (prev[id] !== h) { changed.push(b); } });
        $.each(prev, (id) => { if (next[id] === undefined) { removed.push(id); } });
        let order = $inv.d.order(), prevOrder = tbl.data('dorder') || [];
        tbl.data('dhashes', next).data('dorder', order);
        changed.forEach((b) => pending.push($inv.d.sync({ Target: 'block.replace', Ref: (b.Id || '').toString(), Value: b })));
        removed.forEach((id) => pending.push($inv.d.sync({ Target: 'block.remove', Ref: id })));
        let sameSet = prevOrder.length === order.length && prevOrder.slice().sort().join(',') === order.slice().sort().join(',');
        if (sameSet && prevOrder.join(',') !== order.join(',')) { pending.push($inv.d.sync({ Target: 'block.order', Value: order })); }
        /* $.when(...pending) so a caller (e.g. toSetPrice) can wait until every flushed block
           has actually reached the server before sending a further delta that depends on it —
           otherwise a delayed block.replace carrying pre-conversion values can land after and
           silently overwrite a just-applied server-side mutation (e.g. item.setprice). */
        return $.when.apply($, pending).promise();
    },
    /* Map an inline recipient field to its delta target and send it. No token-guard here for the
       same reason as syncChanged: sync() waits for an in-flight seed instead of dropping the edit. */
    syncField: function (nme, val) {
        let map = { invoicetitle: 'title', invoiceaddress: 'address', invoiceemail: 'email', invoiceemailcc: 'emailcc', loc: 'provisionlocation', provisionlocation: 'provisionlocation', provisionperiod: 'provisionperiod' };
        let target = map[nme]; if (!target) { return; }
        $inv.d.sync({ Target: target, Value: val });
    },
    /* Render the totals footer from the server sums (port of invSumUpdate's footer half). */
    footer: function (tbl, sums, admin) {
        let ft = tbl.children('tfoot').empty(); tbl.nextAll('.fnote').remove();
        let p13b = bool(admin.p13b, false);
        let rwcy = (lbl, val, cls) => $$.tdc('currency', $$.tr(ft, { class: cls || 'tsum' }).append([$$.tdc('aux'), $$.td({ colspan: 4 }).text(lbl)]), fnum(val, $rct.cst));
        let fn = (t) => $$.dc('fnote').insertAfter(tbl).rwText(t);
        rwcy('Netto', sums.total_net || 0);
        if (p13b === false) { $.each(sums.vat || {}, (rate, amt) => rwcy($rct.vat + ' ' + rate + '%', amt, 'tvat')); }
        rwcy('Summe', sums.total_gross || 0);
        let itype = (admin.type || '');
        if (itype === 'i') { fn($rct.note2); fn($rct.note4); }
        else if (itype === 'c') { fn($rct.note2); }
        else {
            fn(string($rct.note3, [fnum(((sums.service_net || 0) + (sums.service_vat || 0)) * (admin.tax_servicerefund || 0), $rct.cst)])).aC('ntax');
            fn($rct.note2);
            fn(string($rct.note1, [fnum((sums.service_net || 0) + (sums.service_vat || 0), $rct.cst), fnum(sums.service_net || 0, $rct.cst), fnum(sums.service_vat || 0, $rct.cst)]));
        }
        if (p13b === true) { fn($rct.note13b); }
    },
    validation: function (msgs) {
        let frm = $('div.invoice_layout'); if (frm.length < 1) { return; }
        let box = frm.children('.dvalidation');
        if (box.length < 1) { box = $$.dc('dvalidation'); frm.prepend(box); }
        box.empty().tC('hidden', (msgs || []).length < 1);
        $.each(msgs || [], (i, m) => $$.dc('dvmsg', box).aC(m.severity).text(m.message));
    },
    /* PDF preview straight from the cache; confirm = flush + finalise, cancel = discard. */
    preview: function () {
        let t = $inv.d.token(); if (t === '') { return; }
        let l = $inv.d.layout();
        let email = ($inv.d.tbl().data('new') || {}).invoiceemail || '';
        if ($fis.ValidateEmail(email) === false) { if (bool(confirm($ict.ivE + $ict.ivEc), false) === false) { return; } }
        l.aC('freeze');
        $ocms.postXT({
            url: $ocms.url('inv/dpreview'), data: { token: t }, success: (response) => {
                l.rC('freeze');
                let c = $$.dc('imagecollection pdfpreview'), vhr = Math.round(vh() * 0.88), total = response.total;
                if (total > 10) { $$.dc('note warn', c).text($ict.tpe); }
                $.each(response.img || [], (ii, img) => { $$.dc('pdfp', c).append($$.img(img).css('max-height', (vhr - rpx(6)).toString() + 'px')); });
                for (let ic = (response.img || []).length + 1; ic <= total; ic++) { $$.dc('pdfp ph', c).append($$.dc('note', $ict.pna)); }
                $ocms.dlg(c, {
                    size: [vhr, Math.round(vw() * 0.88)], zindex: 50, form: false, button: $rct.crI,
                    confirm: function (e) {
                        let ct = $(this); l.aC('freeze');
                        $ocms.postXT({
                            url: $ocms.url('inv/dsave'), data: { token: t }, success: (sv) => {
                                $ocms.postXT({
                                    url: $ocms.url('req/sconf'), data: { id: sv.invid }, success: (cresp) => {
                                        ct.trigger('modal_close');
                                        if (cresp.hasFile === true) { window.open($ocms.url('req/idoc') + '?id=' + sv.invid, '_blank'); }
                                        $inv.d.close();
                                        $ocms.init('req'); $inv.rReload();
                                    }, error: () => { alert($t.f1); ct.trigger('modal_close'); }, complete: () => { l.rC('freeze'); }
                                });
                            }, error: () => { l.rC('freeze'); alert($ict.eis); }
                        });
                    },
                    cancel: function (e) { if (confirm($ict.cdI)) { $inv.d.close(); $inv.rReload(); } }
                });
            }, error: () => { l.rC('freeze'); alert($ict.eis); }
        });
    },
    /* Zwischenspeichern: flush the cache to the DB (no re-upload); stay in the editor. */
    save: function () {
        let t = $inv.d.token(); if (t === '') { return; }
        let l = $inv.d.layout(); l.aC('freeze');
        $ocms.postXT({
            url: $ocms.url('inv/dsave'), data: { token: t }, success: (r) => { $inv.d.tbl().data('invid', r.invid); },
            error: () => { alert($ict.eis); }, complete: () => { l.rC('freeze'); }
        });
    },
    history: function () {
        let t = $inv.d.token(); if (t === '') { return; }
        $ocms.postXT({
            url: $ocms.url('inv/dhistory'), data: { token: t }, success: (r) => {
                let c = $$.dc('dhist');
                if ((r.history || []).length < 1) { $$.dc('note', c).text('Noch keine Änderungen erfasst.'); }
                else {
                    let ts = $$.tblset({ class: 'invtbl fullwidth' }, c);
                    $$.tr(ts.hd).append([$$.th().text('Zeit'), $$.th().text('Feld'), $$.th().text('Alt'), $$.th().text('Neu')]);
                    $.each(r.history, (i, h) => $$.tr(ts.bdy).append([$$.tdc('keep', fdt(h.timestamp)), $$.td().text(h.target), $$.td().text(h.oldValue), $$.td().text(h.newValue)]));
                }
                $ocms.dlg(c, { width: 800, form: false });
            }
        });
    },
    discard: function () {
        let invid = $inv.d.tbl().data('invid') || '';
        if (invid === '') { alert('Es wurde noch kein Zwischenstand gespeichert, der wiederhergestellt werden könnte.'); return; }
        if (confirm('Alle Änderungen verwerfen und den zuletzt gespeicherten Stand neu laden?') === false) { return; }
        $inv.d.close();
        $inv.cntInv({ id: invid });
    },
    warnExpiry: function (secondsLeft) {
        let mins = Math.max(1, Math.round((secondsLeft || 0) / 60));
        $fis.notifications.push({ severity: 'info', title: 'Entwurf läuft ab', message: 'Der Rechnungsentwurf läuft in etwa ' + mins + ' Minute(n) ab. Bitte zwischenspeichern, sonst gehen die Änderungen verloren.' });
    },
    closed: function (reason) {
        let t = $inv.d.token();
        $inv.d.tbl().removeData('dtoken');
        if (t !== '') { $fis.draft.release(t); }
        $fis.frm_edit().remove(); $fis.lf(true);
        $fis.notifications.push({ severity: 'error', title: 'Entwurf geschlossen', message: reason === 'expired' ? 'Der Rechnungsentwurf ist wegen Inaktivität abgelaufen. Nicht gespeicherte Änderungen sind verloren.' : 'Der Rechnungsentwurf wurde geschlossen.' });
        try { $inv.rReload(); } catch (e) { }
    },
    close: function () {
        let t = $inv.d.token();
        if (t !== '') { $ocms.postXT({ url: $ocms.url('inv/dclose'), data: { token: t } }); $fis.draft.release(t); }
        $inv.d.tbl().removeData('dtoken');
    }
};
/* ── Backend-authoritative reminder draft editing (ADR 0006/0007) ─────────────
   The reminder mirror of $inv.d: the server holds the truth for a reminder draft in
   an in-memory session; this object seeds it (rem/dopen), sends single edits as deltas
   (rem/dpatch), and renders the open-amount footer + validation from the authoritative
   server state (rem/dstate). Preview renders straight from the cache (rem/dpreview);
   confirm flushes (rem/dsave) then finalises + emails (rem/conf). It coexists with $inv.d
   on the same DOM: each keys off its own token (rdtoken vs dtoken), so the shared inline
   editor safely no-ops for the mode that is not active. */
$inv.rd = {
    tbl: () => $('div.invoice_layout table.invi'),
    layout: () => $('div.invoice_layout'),
    token: function () { return $inv.rd.tbl().data('rdtoken') || ''; },
    /* Seed the authoritative server session from the assembled reminder editor payload. */
    seed: function (payload) {
        let l = $inv.rd.layout(); l.aC('freeze');
        $ocms.postXT({
            url: $ocms.url('rem/dopen'), data: { payload: JSON.stringify(payload) }, success: (r) => {
                $inv.rd.tbl().data('rdtoken', r.token).data('rdver', r.version);
                $fis.draft.bind(r.token, {
                    onReady: () => $inv.rd.refresh(),
                    onExpiring: (s) => $inv.rd.warnExpiry(s),
                    onClosed: (reason) => $inv.rd.closed(reason)
                });
                $inv.rd.refresh();
            }, error: () => { l.rC('freeze'); }
        });
    },
    /* Re-fetch the authoritative state and render the open-amount footer + validation from it. */
    refresh: function (cb) {
        let t = $inv.rd.token(); if (t === '') { return; }
        $ocms.postXT({
            url: $ocms.url('rem/dstate'), data: { token: t }, success: (state) => {
                $inv.rd.applyState(state); if (typeof cb === 'function') { cb(state); }
            }, error: (xhr) => { if (xhr && xhr.status === 410) { $inv.rd.closed('expired'); } },
            complete: () => { $inv.rd.layout().rC('freeze'); }
        });
    },
    applyState: function (state) {
        let tbl = $inv.rd.tbl(); if (tbl.length < 1) { return; }
        /* See $inv.d.applyState — drop stale/out-of-order dstate responses so an older refresh
           can never roll back a newer one's totals/validation. */
        let curVer = tbl.data('rdver');
        if (typeof curVer === 'number' && typeof state.version === 'number' && state.version < curVer) {
            return;
        }
        tbl.data('rdver', state.version).data('serverSums', state.sums).data('remid', state.remid || '');
        $inv.rd.footer(tbl, state.sums || {});
        $inv.rd.notes(state.notes || {});
        $inv.rd.validation(state.validation || []);
    },
    /* Renders the backend-authoritative intro/closing notice paragraphs (ADR: notice texts
       are backend-authoritative) exactly as FuchsPdf.BuildReminderNotes emits them for the
       PDF, so the online editor always shows precisely what will be printed. */
    notes: function (notes) {
        let frm = $inv.rd.layout(); if (frm.length < 1) { return; }
        let rq = frm.find('.srq'); if (rq.length < 1) { return; }
        rq.children('.dnote').remove();
        let intro = (notes || {}).intro || [], first = rq.children().first();
        intro.slice().reverse().forEach((t) => {
            let p = $$[0]('p').aC('dnote intro').rwText(t);
            if (first.length) { p.insertBefore(first); } else { p.appendTo(rq); }
        });
        ((notes || {}).closing || []).forEach((t) => $$[0]('p').aC('dnote closing').rwText(t).appendTo(rq));
    },
    /* Send one change to the server; the draftReady signal and this success both refresh. */
    sync: function (delta) {
        let t = $inv.rd.token(); if (t === '') { return; }
        $inv.rd.layout().aC('freeze');
        $ocms.postXT({
            url: $ocms.url('rem/dpatch'), data: { token: t, delta: JSON.stringify(delta) },
            success: () => { $inv.rd.refresh(); },
            error: (xhr) => { $inv.rd.layout().rC('freeze'); if (xhr && xhr.status === 410) { $inv.rd.closed('expired'); } }
        });
    },
    /* Map an inline recipient field to its delta target and send it. */
    syncField: function (nme, val) {
        if ($inv.rd.token() === '') { return; }
        let map = { subject: 'subject', invoiceaddress: 'address', invoiceemail: 'email', text: 'text' };
        let target = map[nme]; if (!target) { return; }
        $inv.rd.sync({ Target: target, Value: val });
    },
    /* Amount / amount-paid come from the item-row dialog; send both as their own deltas. */
    syncAmount: function (amount, amount_payed) {
        if ($inv.rd.token() === '') { return; }
        $inv.rd.sync({ Target: 'amount', Value: (amount != null ? amount : 0).toString() });
        $inv.rd.sync({ Target: 'amount_payed', Value: (amount_payed != null ? amount_payed : 0).toString() });
    },
    /* Render the open-amount footer from the server sums. Detail rows ($inv.rRemRw) have
       6 columns (aux, invoiceid, date, amount, amount_payed, open); span the label over the
       4 columns between aux and the open-amount column so the total lands in the same last
       column as the per-invoice open amounts. */
    footer: function (tbl, sums) {
        let ft = tbl.children('tfoot').empty();
        let tr = $$.tr(ft, { class: 'tsum' }).append([$$.tdc('aux'), $$.td({ colspan: 4 }).text('Offener Betrag')]);
        $$.tdc('currency', tr, fnum(sums.amount_open || 0, $rct.cst));
    },
    validation: function (msgs) {
        let frm = $inv.rd.layout(); if (frm.length < 1) { return; }
        let box = frm.children('.dvalidation');
        if (box.length < 1) { box = $$.dc('dvalidation'); frm.prepend(box); }
        box.empty().tC('hidden', (msgs || []).length < 1);
        $.each(msgs || [], (i, m) => $$.dc('dvmsg', box).aC(m.severity).text(m.message));
    },
    /* PDF preview straight from the cache; confirm = flush + finalise + email, cancel = discard. */
    preview: function () {
        let t = $inv.rd.token(); if (t === '') { return; }
        let l = $inv.rd.layout();
        let email = (($inv.rd.tbl().data('new') || {}).invoiceemail) || '';
        if ($fis.ValidateEmail(email) === false) { if (bool(confirm($ict.ivE + $ict.ivEc), false) === false) { return; } }
        l.aC('freeze');
        $ocms.postXT({
            url: $ocms.url('rem/dpreview'), data: { token: t }, success: (response) => {
                l.rC('freeze');
                let c = $$.dc('imagecollection pdfpreview'), vhr = Math.round(vh() * 0.88);
                $.each(response.img || [], (ii, img) => { $$.dc('pdfp', c).append($$.img(img).css('max-height', (vhr - rpx(6)).toString() + 'px')); });
                $ocms.dlg(c, {
                    size: [vhr, Math.round(vw() * 0.88)], zindex: 50, form: false, button: $ict.remd,
                    confirm: function (e) {
                        let ct = $(this); l.aC('freeze');
                        $ocms.postXT({
                            url: $ocms.url('rem/dsave'), data: { token: t }, success: (sv) => {
                                $ocms.postXT({
                                    url: $ocms.url('rem/conf'), data: { id: sv.remid }, success: () => {
                                        ct.trigger('modal_close');
                                        window.open($ocms.url('rem/idoc') + '?id=' + sv.remid, '_blank');
                                        $inv.rd.close();
                                        $ocms.init('req'); $inv.rReload();
                                    }, error: () => { alert($t.f1); ct.trigger('modal_close'); }, complete: () => { l.rC('freeze'); }
                                });
                            }, error: () => { l.rC('freeze'); alert($t.f1); }
                        });
                    },
                    cancel: function (e) { if (confirm($ict.cdI)) { $inv.rd.close(); $inv.rReload(); } }
                });
            }, error: () => { l.rC('freeze'); alert($t.f1); }
        });
    },
    /* Zwischenspeichern: flush the cache to the DB (no re-upload); stay in the editor. */
    save: function () {
        let t = $inv.rd.token(); if (t === '') { return; }
        let l = $inv.rd.layout(); l.aC('freeze');
        $ocms.postXT({
            url: $ocms.url('rem/dsave'), data: { token: t }, success: (r) => { $inv.rd.tbl().data('remid', r.remid); },
            error: () => { alert($t.f1); }, complete: () => { l.rC('freeze'); }
        });
    },
    history: function () {
        let t = $inv.rd.token(); if (t === '') { return; }
        $ocms.postXT({
            url: $ocms.url('rem/dhistory'), data: { token: t }, success: (r) => {
                let c = $$.dc('dhist');
                if ((r.history || []).length < 1) { $$.dc('note', c).text('Noch keine Änderungen erfasst.'); }
                else {
                    let ts = $$.tblset({ class: 'invtbl fullwidth' }, c);
                    $$.tr(ts.hd).append([$$.th().text('Zeit'), $$.th().text('Feld'), $$.th().text('Alt'), $$.th().text('Neu')]);
                    $.each(r.history, (i, h) => $$.tr(ts.bdy).append([$$.tdc('keep', fdt(h.timestamp)), $$.td().text(h.target), $$.td().text(h.oldValue), $$.td().text(h.newValue)]));
                }
                $ocms.dlg(c, { width: 800, form: false });
            }
        });
    },
    warnExpiry: function (secondsLeft) {
        let mins = Math.max(1, Math.round((secondsLeft || 0) / 60));
        $fis.notifications.push({ severity: 'info', title: 'Entwurf läuft ab', message: 'Der Mahnentwurf läuft in etwa ' + mins + ' Minute(n) ab. Bitte zwischenspeichern, sonst gehen die Änderungen verloren.' });
    },
    closed: function (reason) {
        let t = $inv.rd.token();
        $inv.rd.tbl().removeData('rdtoken');
        if (t !== '') { $fis.draft.release(t); }
        $fis.frm_edit().remove(); $fis.lf(true);
        $fis.notifications.push({ severity: 'error', title: 'Entwurf geschlossen', message: reason === 'expired' ? 'Der Mahnentwurf ist wegen Inaktivität abgelaufen. Nicht gespeicherte Änderungen sind verloren.' : 'Der Mahnentwurf wurde geschlossen.' });
        try { $inv.rReload(); } catch (e) { }
    },
    close: function () {
        let t = $inv.rd.token();
        if (t !== '') { $ocms.postXT({ url: $ocms.url('rem/dclose'), data: { token: t } }); $fis.draft.release(t); }
        $inv.rd.tbl().removeData('rdtoken');
    }
};
$inv.cInv2 = function (data) {
    let fr = $$.dc('rfrm').ldng(1);
    let o = $ocms.dlg(fr, { width: 1000 });
    if (o) { o.ft.rwText($rct.rq1); }
    let mainfnc = () => {
        $ocms.postXT({
            url: $ocms.url('req/get'), timeout: 60, data: { id: data.id, mode: 'r' }, success: (response) => {
                //console.debug(response);
                response.admin = response.admin || {};
                let lf = $fis.lf(true).aC('fix').rC('hd');
                $fis.frm_edit().IN();
                $inv.eM(true, true);
                if ((response.requests || []).length < 1) {
                    lf.aC('fix').text($rct.nd);
                } else {

                    $$.dc('lh', lf, $rct.mdl);
                    let iv = $$.d(), rq = $$.ul({ class: 'rql' }).data({ search: data.id, parent: response.admin.parent }).appendTo(lf), rqa = {}, cl = $rcol.req.lbl();
                    $.each(response.requests || [], function (ri, rx) {
                        let rli = $$.li({ class: 'cli rli' }).data($.extend({}, rx)).appendTo(rq);
                        let lihd = $$.dc('lihd', rli).addClass(rx.state);
                        if (booln(rx.open, false) === true) {
                            lihd.append($$.sc('cbox').click(() => {
                                rli.tC('checked');
                                iv.find('li').rC('checked');
                                if (rli.is('.checked') === true) {
                                    $inv.rMn(rx.open);
                                } else {
                                    $inv.eM(true);
                                }
                            }));
                        }
                        lihd.append([$$.sc('eid', rx.ExternalId), $$.sc('nme', rx.Name)]);
                        $$.dc('lidt', rli).append([$$.dc('rqs').append([$$.s(cl.State + ': '), $$.s($rct.sts[rx.State || '-'])]), $$.dc('ivn').append([$$.s(cl.InvoiceId + ': '), $$.s(rx.InvoiceId || '- -')]), $$.dc('wda').append([$$.s(cl.WorkDoneAt + ': '), $$.s(fdt(rx.WorkDoneAt, 'dd.MM.yyyy'))])]);
                        rqa[rx.Id] = rli;
                    });
                    if ((response.inv || []).length > 0) {
                        $$.dc('lh', lf, $rct.invs);
                        iv = $$.ul({ class: 'ivl' }).appendTo(lf);  /*  first assignment to iv is fake, just to prevent issues */
                        $.each(response.inv || [], (ii, ix) => {
                            let ili = $$.li({ class: 'cli ili' }).data($.extend({}, ix)).appendTo(iv);
                            let lihd = $$.dc('lihd', ili).addClass(ix.invstatus);
                            if (booln(ix.isFinal, true) === false) {
                                lihd.append($$.sc('cbox').click(() => {
                                    if ((ix.Id || '') !== '') {
                                        ili.tC('checked').siblings().rC('checked'); rq.find('li').rC('checked');
                                        if (ili.is('.checked') === true) {
                                            $inv.iMnr(ix);
                                        } else {
                                            $inv.eM(true);  /* empty menu */
                                        }
                                    }
                                }));
                            } else if (['', 'dft'].indexOf(ix.invstatus) < 0) {
                                lihd.append($$.sc('dli').click(function () { $inv.disp(ix.Id, 'inv'); }));
                            }
                            lihd.append($$.sc('nme', ix.DocumentName || ix.Id));
                            $$.dc('lidt', ili).append([$$.dc('wda').append([$$.s(fdt(ix.DateCreated, 'dd.MM.yyyy'))]), $$.d().text($ict.iSt[ix.invstatus] || ix.invstatus)]);
                        });
                    }

                }
            }, complete: () => {
                if (o) { o.c.trigger('modal_close'); }
            }
        });
    };
    $ocms.postXT({
        url: $ocms.url('req/pget'), timeout: 90, data: { id: data.id }, success: (r1) => {
            if (o) { o.ft.rwText($rct.rq2); }
            mainfnc();
        }, error: () => {
            if (confirm($rct.rq1f)) {
                if (o) { o.ft.rwText($rct.rq2); }
                mainfnc();
            } else {
                if (o) { o.c.trigger('modal_close'); }
            }
        }
    });
};
$inv.ccInv = function (ev) {  //normale rechnung
    let data = ev.data || {}, typ = data.typ || 'r';
    let lf = $fis.lf(), rql = lf.children('ul.rql'), parent = rql.data('parent');
    let selli = [];
    rql.find('li.rli.checked').each(function () {
        selli.push($(this).data('Id'));
    });
    if (selli.length < 1) {  // abort if none selected
        alert($rct.dnS);
        return;
    }else if (typ === 'i' && selli.length > 1) {  // abort if intermediate invoice and several selected
        alert($rct.dII);
        return;
    }
    let edf = $fis.frm_edit(), frm = $$.dc('invoice_layout', edf).append($$.dc('btn sprev').click($inv.sprev));
    let ww = $fis.cf().width() > (frm.width() + lf.width() + 20);
    lf.tC('fix', ww).tC('hd', !ww);
    $inv.eM(false, true);
    let fr = $$.dc('rfrm').ldng(1);
    let o = $ocms.dlg(fr, { width: 1000 });
    o.ft.rwText($rct.rq2);
    $ocms.postXT({
        url: $ocms.url('req/iget'), timeout: 60, data: { id: parent, mode: 'ful', typ: typ, sel: selli.join(',') }, success: (response) => {
            //console.debug(response);

            let rq = $$.dc('srq', frm);
            let rif = $$.tblset({ class: 'invi' }, rq);
            rif.bdy.remove();
            rif.ft = $$[0]('tfoot');
            response.admin = response.admin || {};
            response.admin.p13b = bool(response.admin.p13b || '', (((response.inv || {}).InvoiceOptions || '').split(',').includes('§13b') === true));
            rif.tbl.data($.extend({ new: {}, sms: {}, itm: {} }, { admin: response.admin, companies: response.companies, locations: response.locations }));
            let thr = $$.tr(rif.hd).aC('shd').append([$$.th().aC('aux')]);  /*  header row for items */
            $rct.invHR.forEach(h => $$.th(thr, h));
            rif.tbl.on('fds.inv', $inv.invSumUpdate);
            $.each(response.requests || [], function (ri, rx) {
                let srqid = rx.Id || 0;
                if (srqid !== 0) {
                    let worknotes = $inv.worknotes(rx);
                    rx.text = response.admin.type === 'i' ? ($rct.req + (jine([rx.ExternalId, rx.Name], ': ').eine(' ', ''))) : (jine([jine([fdt(rx.WorkDoneAt, 'dd.MM.yy'), rx.ExternalId], ' - ' + $rct.req + ' '), worknotes.ne(rx.Name)], ': \n'));
                    let bdy = $$.tbody(rif.tbl).data($.extend({}, rx));
                    $inv.rendersrq.call(bdy);
                }
            });

            /* add an empty */
            let atr = $$.tr($$.tbody(rif.tbl), { class: 'placeholder' }).data({ net_val: 0, vat_val: 0, svcnet_val: 0, svcvat_val: 0, net: 0 });
            $inv.rrw.call(atr);

            rif.ft.appendTo(rif.tbl);


            let admin = response.admin || {}, fm = (cls, txt, nme, hd, dta) => {
                let fr = $$.dc('inpfrm', frm).aC(cls).append(typeof hd === 'string' ? $$.dc('ahd', hd) : (hd > 0 ? $$.dc('ahd', $rct.frm[nme]) : null)), fc = $$.dc('content', fr).rwText(txt);
                $$.dc('axf', fr).append($$.dc('ibtn edit', { title: $rct.frmTT[nme] || $rct.frm[nme] }).data('dialog', $rct.frm[nme]).append(gi('pencil')).click($.extend({ t: fc, nme: nme, change: (nv) => { rif.tbl.data('new')[nme] = nv; } }, dta), $inv.eHtml));
                rif.tbl.data('new')[nme] = txt;
            };
            fm('tfrm', admin.invoicetitle, 'invoicetitle', 0, null);
            fm('adrfrm', admin.invoiceaddress, 'invoiceaddress', 0, null);
            fm('locfrm', '', 'loc', 1, { list: deepCopy(response.locations), lbl: 'ref', property: 'address' });
            $inv.emailFrm(frm, rif, admin.invoiceemail, admin.invoiceemailcc);
            $$.dc('sndfrm', frm).append($$.dc('content').text(admin.sender));

            let admtxt, admlbl;
            if (admin.provisionend) {
                admlbl = admin.provisionstart ? $rct.provP : $rct.provD;
                admtxt = admin.provisionstart ? (fdt(admin.provisionstart, 'dd.MM.yyyy') + ' - ' + fdt(admin.provisionend, 'dd.MM.yyyy')) : fdt(admin.provisionend, 'dd.MM.yyyy');
            }
            fm('admfrm', admtxt, 'provisionperiod', admlbl, 1, null);
            rif.tbl.data('new').CustomValues = admin.CustomValues || '';
            $$.dc('inpfrm ctpfrm', frm).text(jObj(admin.CustomValues, 'contactName'));
            //adm = $$.dc('admfrm', frm), admc = $$.dc('content', adm),

            rif.tbl.children('tbody').each($inv.bdysort);
            rif.tbl.trigger('fds.inv');  /* trigger calculations */

            $inv.eM(false, true, $inv.emOpt(admin));
        }, complete: () => {
            o.c.trigger('modal_close');
        }
    });
};
$inv.ccStInv = function (ev) {  // Stornorechnung
    let data = ev.data || {};
    let lf = $fis.lf(), oldinv = data.id;
    
    let frm = $$.dc('invoice_layout', $fis.frm_edit()).append($$.dc('btn sprev').click($inv.sprev));
    let ww = $fis.cf().width() > (frm.width() + lf.width() + 20);
    lf.tC('fix', ww).tC('hd', !ww);
    $inv.eM(false, true);
    let fr = $$.dc('rfrm').ldng(1);
    let o = $ocms.dlg(fr, { width: 1000 });
    o.ft.rwText($ict.iq1);
    $ocms.postXT({
        url: $ocms.url('inv/pget'), timeout: 90, data: { id: data.id }, success: (response) => {
            if (o) { o.ft.rwText($ict.iq2); }
            $ocms.postXT({
                url: $ocms.url('inv/icget'), timeout: 60, data: { id: oldinv }, success: (response) => {
                    //console.debug(response);

                    let rq = $$.dc('srq', frm);
                    let rif = $$.tblset({ class: 'invi' }, rq);
                    rif.bdy.remove();
                    rif.ft = $$[0]('tfoot');
                    response.admin = response.admin || {};
                    response.admin.p13b = bool(response.admin.p13b || '', (((response.inv || {}).InvoiceOptions || '').split(',').includes('§13b') === true));
                    rif.tbl.data($.extend({ new: {}, sms: {}, itm: {} }, { admin: response.admin, companies: response.companies, locations: response.locations }));
                    let thr = $$.tr(rif.hd).aC('shd').append([$$.th().aC('aux')]);  /*  header row for items */
                    $rct.invHR.forEach(h => $$.th(thr, h));
                    rif.tbl.on('fds.inv', $inv.invSumUpdate);
                    $.each(response.requests || [], function (ri, rx) {
                        let srqid = rx.Id || 0;
                        if (srqid !== 0) {
                            let worknotes = $inv.worknotes(rx);
                            rx.text = response.admin.type === 'i' ? ($rct.req + (jine([rx.ExternalId, rx.Name], ': ').eine(' ', ''))) : (jine([fdt(rx.WorkDoneAt, 'dd.MM.yy') + worknotes.ne(rx.Name)], ': '));
                            let bdy = $$.tbody(rif.tbl).data($.extend({}, rx));
                            $inv.rendersrq.call(bdy);
                        }
                    });

                    /* add an empty */
                    let atr = $$.tr($$.tbody(rif.tbl), { class: 'placeholder' }).data({ net_val: 0, vat_val: 0, svcnet_val: 0, svcvat_val: 0, net: 0 });
                    $inv.rrw.call(atr);

                    rif.ft.appendTo(rif.tbl);


                    let admin = response.admin || {}, fm = (cls, txt, nme, hd, dta) => {
                        let fr = $$.dc('inpfrm', frm).aC(cls).append(typeof hd === 'string' ? $$.dc('ahd', hd) : (hd > 0 ? $$.dc('ahd', $rct.frm[nme]) : null)), fc = $$.dc('content', fr).rwText(txt);
                        $$.dc('axf', fr).append($$.dc('ibtn edit', { title: $rct.frmTT[nme] || $rct.frm[nme] }).data('dialog', $rct.frm[nme]).append(gi('pencil')).click($.extend({ t: fc, nme: nme, change: (nv) => { rif.tbl.data('new')[nme] = nv; } }, dta), $inv.eHtml));
                        rif.tbl.data('new')[nme] = txt;
                    };
                    fm('tfrm', admin.invoicetitle, 'invoicetitle', 0, null);
                    fm('adrfrm', admin.invoiceaddress, 'invoiceaddress', 0, null);
                    fm('locfrm', admin.provisionlocation, 'loc', 1, { list: deepCopy(response.locations), lbl: 'ref', property: 'address' });
                    $inv.emailFrm(frm, rif, admin.invoiceemail, admin.invoiceemailcc);
                    $$.dc('sndfrm', frm).append($$.dc('content').text(admin.sender));

                    let admtxt, admlbl;
                    if (admin.provisionend) {
                        admlbl = admin.provisionstart ? $rct.provP : $rct.provD;
                        admtxt = admin.provisionstart ? (fdt(admin.provisionstart, 'dd.MM.yyyy') + ' - ' + fdt(admin.provisionend, 'dd.MM.yyyy')) : fdt(admin.provisionend, 'dd.MM.yyyy');
                    }
                    fm('admfrm', admtxt, 'provisionperiod', admlbl, 1, null);
                    rif.tbl.data('new').CustomValues = admin.CustomValues || '';
                    $$.dc('inpfrm ctpfrm', frm).text(jObj(admin.CustomValues, 'contactName'));
                    //adm = $$.dc('admfrm', frm), admc = $$.dc('content', adm),

                    rif.tbl.children('tbody').each($inv.bdysort);
                    rif.tbl.trigger('fds.inv');  /* trigger calculations */

                }, complete: () => {
                    o.c.trigger('modal_close');
                }
            });

        }, error: () => {
            if (o) { o.c.trigger('modal_close'); }
        }
    });
};
$inv.clCntInv = function (ev) {  //  click-handler for invoice continuation
    let lf = $fis.lf(false), selli = [];
    lf.find('li.ili.checked').each(function () {
        selli.push($(this).data('Id'));
    });
    if (selli.length === 1) {
        //$('#contentframe').empty();
        $inv.cntInv({ id: selli[0] });
    }
};
$inv.cntInv = function (data) {  //invoice continuation
    data = data || {};
    let lf = $fis.lf(false).rC('fix').aC('hd'), frm = $$.dc('invoice_layout', $fis.frm_edit()).append($$.dc('btn sprev').click($inv.sedit));
    $inv.eM(false, true);
    let fr = $$.dc('rfrm').ldng(1);
    let o = $ocms.dlg(fr, { width: 1000 });
    o.ft.rwText($rct.rq2);
    $ocms.postXT({
        url: $ocms.url('inv/get'), timeout: 60, data: { id: data.id }, success: (response) => {
            //console.debug(response);
            response.admin = response.admin || {};
            let inv = response.inv || {};
            let rq = $$.dc('srq', frm);
            let rif = $$.tblset({ class: 'invi' }, rq);
            rif.bdy.remove();
            rif.ft = $$[0]('tfoot');
            rif.tbl.data($.extend({ invid: inv.Id, new: {}, sms: { }, itm: {}, bai: [] }, response));
            let thr = $$.tr(rif.hd).aC('shd').append([$$.th().aC('aux')]);  /*  header row for items */
            $rct.invHR.forEach(h => $$.th(thr, h));
            rif.tbl.on('fds.inv', $inv.invSumUpdate);
            $.each(response.req || [], function (ri, rx) {
                let bdy = $$.tbody(rif.tbl).data($.extend({}, rx));
                $inv.rendersrq.call(bdy);
            });

            /* add an empty */
            let atr = $$.tr($$.tbody(rif.tbl), { class: 'placeholder' }).data({ net_val: 0, vat_val: 0, svcnet_val: 0, svcvat_val: 0, net: 0 });
            $inv.rrw.call(atr);

            rif.ft.appendTo(rif.tbl);


            let fm = (cls, txt, nme, hd, dta) => {
                let fr = $$.dc('inpfrm', frm).aC(cls).append(typeof hd === 'string' ? $$.dc('ahd', hd) : (hd > 0 ? $$.dc('ahd', $rct.frm[nme]) : null)), fc = $$.dc('content', fr).rwText(txt);
                $$.dc('axf', fr).append($$.dc('ibtn edit', { title: $rct.frmTT[nme] || $rct.frm[nme] }).data('dialog', $rct.frm[nme]).append(gi('pencil')).click($.extend({ t: fc, nme: nme, change: (nv) => { rif.tbl.data('new')[nme] = nv; } }, dta), $inv.eHtml));
                rif.tbl.data('new')[nme] = txt;
            };
            fm('tfrm', inv.InvoiceTitle, 'invoicetitle', 0, null);
            fm('adrfrm', inv.SendToAddress, 'invoiceaddress', 0, null);
            fm('locfrm', inv.ProvisionLocation, 'loc', 1, null);
            $inv.emailFrm(frm, rif, inv.SendToEmail, inv.SendToEmailCc);
            $$.dc('sndfrm', frm).append($$.dc('content').text(response.admin.sender));

            fm('admfrm', inv.ProvisionPeriod, 'provisionperiod', ((inv.ProvisionPeriod || '').includes('-') === true ? $rct.provP : $rct.provD), 1, null);
            rif.tbl.data('new').CustomValues = inv.CustomValues || '';
            $$.dc('inpfrm ctpfrm', frm).text(jObj(inv.CustomValues, 'contactName'));
            //adm = $$.dc('admfrm', frm), admc = $$.dc('content', adm),

            rif.tbl.children('tbody').each($inv.bdysort);
            rif.tbl.trigger('fds.inv');  /* trigger calculations */
            $inv.eM(false, true, $inv.emOpt(response.admin));
        }, complete: () => {
            o.c.trigger('modal_close');
        }
    });
};
$inv.cSt = function (data) {
    data = data || {};
    let lf = $fis.lf(), frm = $$.dc('invoice_layout', $fis.frm_edit()).append($$.dc('btn sprev').click($inv.sedit));
    let ww = $fis.cf().width() > (frm.width() + lf.width() + 20);
    lf.tC('fix', ww).tC('hd', !ww);
    $inv.eM(false, true);
    let fr = $$.dc('rfrm').ldng(1);
    let o = $ocms.dlg(fr, { width: 1000 });
    o.ft.rwText($ict.iq1);
    $ocms.postXT({
        url: $ocms.url('inv/pget'), data: { id: data.id }, success: (response) => {
            if (o) { o.ft.rwText($ict.iq2); }
            $ocms.postXT({
                url: $ocms.url('inv/storno'), data: { id: data.id, mode: data.mode }, success: (response) => {
                    //console.debug(response);
                    response.admin = response.admin || {};
                    response.admin.p13b = bool(response.admin.p13b || '', (((response.inv || {}).InvoiceOptions || '').split(',').includes('§13b') === true));
                    let inv = response.inv || {};
                    let rq = $$.dc('srq', frm);
                    let rif = $$.tblset({ class: 'invi' }, rq);
                    rif.bdy.remove();
                    rif.ft = $$[0]('tfoot');
                    rif.tbl.data($.extend({ invid: inv.Id, new: {}, sms: {}, itm: {}, bai: [] }, response));
                    let thr = $$.tr(rif.hd).aC('shd').append([$$.th().aC('aux')]);  /*  header row for items */
                    $rct.invHR.forEach(h => $$.th(thr, h));
                    rif.tbl.on('fds.inv', $inv.invSumUpdate);
                    $.each(response.req || [], function (ri, rx) {
                        let bdy = $$.tbody(rif.tbl).data($.extend({}, rx));
                        $inv.rendersrq.call(bdy);
                    });

                    /* add an empty */
                    let atr = $$.tr($$.tbody(rif.tbl), { class: 'placeholder' }).data({ net_val: 0, vat_val: 0, svcnet_val: 0, svcvat_val: 0, net: 0 });
                    $inv.rrw.call(atr);

                    rif.ft.appendTo(rif.tbl);


                    let fm = (cls, txt, nme, hd, dta) => {
                        let fr = $$.dc('inpfrm', frm).aC(cls).append(typeof hd === 'string' ? $$.dc('ahd', hd) : (hd > 0 ? $$.dc('ahd', $rct.frm[nme]) : null)), fc = $$.dc('content', fr).rwText(txt);
                        $$.dc('axf', fr).append($$.dc('ibtn edit', { title: $rct.frmTT[nme] || $rct.frm[nme] }).data('dialog', $rct.frm[nme]).append(gi('pencil')).click($.extend({ t: fc, nme: nme, change: (nv) => { rif.tbl.data('new')[nme] = nv; } }, dta), $inv.eHtml));
                        rif.tbl.data('new')[nme] = txt;
                    };
                    fm('tfrm', inv.InvoiceTitle, 'invoicetitle', 0, null);
                    fm('adrfrm', inv.SendToAddress, 'invoiceaddress', 0, null);
                    fm('locfrm', inv.ProvisionLocation, 'loc', 1, null);
                    $inv.emailFrm(frm, rif, inv.SendToEmail, inv.SendToEmailCc);
                    $$.dc('sndfrm', frm).append($$.dc('content').text(response.admin.sender));

                    fm('admfrm', inv.ProvisionPeriod, 'provisionperiod', ((inv.ProvisionPeriod || '').includes('-') === true ? $rct.provP : $rct.provD), 1, null);
                    rif.tbl.data('new').CustomValues = inv.CustomValues || '';
                    $$.dc('inpfrm ctpfrm', frm).text(jObj(inv.CustomValues,'contactName'));
                    //adm = $$.dc('admfrm', frm), admc = $$.dc('content', adm),

                    rif.tbl.children('tbody').each($inv.bdysort);
                    rif.tbl.trigger('fds.inv');  /* trigger calculations */

                }, complete: () => {
                    o.c.trigger('modal_close');
                }
            });

        }, error: () => {
            if (o) { o.c.trigger('modal_close'); }
        }
    });
};
/* Country choices for the structured recipient-address dialog (ISO 3166-1 alpha-2, BT-55). */
$inv.adrCountries = [['DE', 'Deutschland'], ['AT', 'Österreich'], ['CH', 'Schweiz'], ['FR', 'Frankreich'],
    ['NL', 'Niederlande'], ['BE', 'Belgien'], ['LU', 'Luxemburg'], ['IT', 'Italien'], ['ES', 'Spanien'],
    ['PL', 'Polen'], ['DK', 'Dänemark'], ['CZ', 'Tschechien'], ['GB', 'Großbritannien'], ['US', 'USA']];

/* Compose the free-text postal block (for the inline display) from the structured address —
   mirrors the backend InvoiceRecipientAddress.Compose (the VAT id is never part of the block). */
$inv.composeAddress = function (a) {
    a = a || {}; let lines = [];
    let push = (v) => { v = ('' + (v || '')).trim(); if (v !== '') lines.push(v); };
    push(a.name);
    if (('' + (a.contact || '')).trim() !== '') push('z.Hd. ' + ('' + a.contact).trim());
    push(a.line2 || a.addressLine2);
    push(a.street);
    push((('' + (a.postalCode || '')) + ' ' + ('' + (a.city || ''))).trim());
    let cc = ('' + (a.countryCode || '')).toUpperCase();
    if (cc !== '' && cc !== 'DE') push(cc);
    return lines.join('\n');
};

/* The structured recipient address currently in effect: the backend keeps it in
   CustomValues.sendToAddress (survives a draft refresh); new invoices seed it from
   fds__prepInvoice's invoiceaddressData; otherwise start empty. */
$inv.adrCurrent = function (tbl) {
    let cv = jObj((tbl.data('new') || {}).CustomValues, 'sendToAddress');
    if (typeof cv === 'string' && cv.trim().charAt(0) === '{') { try { cv = JSON.parse(cv); } catch (e) { cv = null; } }
    if (cv && typeof cv === 'object') return cv;
    let ad = (tbl.data('admin') || {}).invoiceaddressData;
    if (typeof ad === 'string' && ad.trim().charAt(0) === '{') { try { return JSON.parse(ad); } catch (e) { } }
    else if (ad && typeof ad === 'object') { return ad; }
    return {};
};

/* Structured recipient-address dialog (EN 16931 / DATEV). Posts the address delta as a JSON
   object; the backend stores it, composes SendToAddress and keeps the PDF unchanged (ADR 0012).
   B2C stays effortless: the USt-IdNr. is optional (empty = private person). */
$inv.eAddress = function (ev) {
    let tbl = $inv.d.tbl(), cur = $inv.adrCurrent(tbl);
    let flds = [
        { name: 'name', label: 'Name / Firma', type: 'text', value: cur.name || '', required: true },
        { name: 'contact', label: 'z.Hd. (optional)', type: 'text', value: cur.contact || '' },
        { name: 'street', label: 'Straße + Nr.', type: 'text', value: cur.street || '' },
        { name: 'line2', label: 'Adresszusatz (optional)', type: 'text', value: cur.line2 || cur.addressLine2 || '' },
        { name: 'postalCode', label: 'PLZ', type: 'text', value: cur.postalCode || '' },
        { name: 'city', label: 'Ort', type: 'text', value: cur.city || '' },
        { name: 'countryCode', label: 'Land', type: 'select', url: $inv.adrCountries, value: (cur.countryCode || 'DE') },
        { name: 'vatId', label: 'USt-IdNr. (nur bei Firmen)', type: 'text', value: cur.vatId || '' },
        { name: 'leitwegId', label: 'Leitweg-ID (nur Behörden / B2G)', type: 'text', value: cur.leitwegId || '' }
    ];
    let hint = $$.dc('adr-conformity').append([
        $$.dc('hd').text('Hinweis zur DATEV-/eRechnungs-Konformität'),
        $$.dc('tx').text('Pflicht: Name, Straße, PLZ, Ort und Land. Die USt-IdNr. nur bei Firmen angeben — '
            + 'für eine Rechnung an eine Privatperson einfach leer lassen. Eine Leitweg-ID nur bei '
            + 'Behörden (B2G) — dann wird die Rechnung automatisch als XRechnung erzeugt.')
    ]);
    $ocms.dlgform(flds, {
        title: 'Rechnungsempfänger',
        addcontent: hint,
        success: function (res) {
            let a = {
                name: res.name || '', contact: res.contact || '', line2: res.line2 || '',
                street: res.street || '', postalCode: res.postalCode || '', city: res.city || '',
                countryCode: (res.countryCode || 'DE'), vatId: ('' + (res.vatId || '')).trim(),
                leitwegId: ('' + (res.leitwegId || '')).trim()
            };
            let txt = $inv.composeAddress(a);
            if (ev.data && ev.data.t) { ev.data.t.rwText(txt); }
            if (typeof (ev.data || {}).change === 'function') { ev.data.change(txt); }
            /* Structured delta — the invoice draft backend accepts a JSON object for 'address'. */
            $inv.d.sync({ Target: 'address', Value: a });
        }
    });
};

/* Leistungsdatum / -zeitraum: structured German-date entry only (no free text). A single date =
   Leistungsdatum (BT-72); a from+to date = Leistungszeitraum (BG-14). The composed value is a
   German dd.MM.yyyy string ("18.06.2026" or "01.06.2026 - 30.06.2026") that the PDF shows and the
   backend maps to the eRechnung service date/period. */
$inv.provToIso = function (dmy) {
    let m = ('' + (dmy || '')).match(/(\d{1,2})\.(\d{1,2})\.(\d{4})/);
    return m ? (m[3] + '-' + ('0' + m[2]).slice(-2) + '-' + ('0' + m[1]).slice(-2)) : '';
};
$inv.eProvisionPeriod = function (ev) {
    let cur = ('' + (ev.data && ev.data.t ? ev.data.t.text() : '')).trim();
    let dates = cur.match(/\d{1,2}\.\d{1,2}\.\d{4}/g) || [];
    let flds = [
        { name: 'von', label: 'Leistungsdatum', type: 'date', value: $inv.provToIso(dates[0] || '') },
        { name: 'bis', label: 'Leistungszeitraum – bis (optional)', type: 'date', value: $inv.provToIso(dates[1] || '') }
    ];
    let hint = $$.dc('adr-conformity').append([
        $$.dc('hd').text('Leistungsdatum / -zeitraum'),
        $$.dc('tx').text('Für ein einzelnes Datum nur „Leistungsdatum" ausfüllen; für einen Zeitraum '
            + 'zusätzlich das Bis-Datum. Nur strukturierte Datumsauswahl — für die E-Rechnung empfohlen.')
    ]);
    $ocms.dlgform(flds, {
        title: 'Leistungsdatum / -zeitraum',
        addcontent: hint,
        success: function (res) {
            let v = ('' + (res.von || '')).trim(), b = ('' + (res.bis || '')).trim();
            let txt = v === '' ? '' : ((b === '' || b === v) ? v : (v + ' - ' + b));
            if (ev.data && ev.data.t) { ev.data.t.rwText(txt); }
            if (typeof (ev.data || {}).change === 'function') { ev.data.change(txt); }
            $inv.d.sync({ Target: 'provisionperiod', Value: txt });
        }
    });
};

/* Main recipient + CC ("Zusatzempfänger") edited together in one dialog — there is no separate
   pencil on the CC row, only on the email row (see $inv.emailFrm), which passes both content
   spans through ev.data.t / ev.data.ccT. */
$inv.eEmail = function (ev) {
    let flds = [
        { name: 'email', label: $rct.frm.invoiceemail, type: 'text', value: (ev.data.t || $$.s()).text() },
        { name: 'emailcc', label: $rct.frm.invoiceemailcc, type: 'text', value: (ev.data.ccT || $$.s()).text() }
    ];
    $ocms.dlgform(flds, {
        title: $rct.frm.invoiceemail,
        success: function (res) {
            let email = ('' + (res.email || '')).trim(), cc = ('' + (res.emailcc || '')).trim();
            if (ev.data && ev.data.t) { ev.data.t.text(email); }
            if (ev.data && ev.data.ccT) { ev.data.ccT.text(cc); }
            if (typeof (ev.data || {}).change === 'function') { ev.data.change(email); }
            if (typeof (ev.data || {}).changeCc === 'function') { ev.data.changeCc(cc); }
            /* backend-authoritative: mirror both fields to the server session (see $inv.eHtml's
               generic path, which this mirrors for a single field). */
            $inv.d.syncField('invoiceemail', email);
            $inv.rd.syncField('invoiceemail', email);
            $inv.d.syncField('invoiceemailcc', cc);
            $inv.rd.syncField('invoiceemailcc', cc);
        }
    });
};
/* Builds the email + CC ("Zusatzempfänger") header rows together: only the email row gets a
   pencil, opening the combined $inv.eEmail dialog for both fields (see there). */
$inv.emailFrm = function (frm, rif, email, emailcc) {
    let ccfr = $$.dc('inpfrm emailccfrm', frm), ccfc = $$.dc('content', ccfr).rwText(emailcc);
    let efr = $$.dc('inpfrm emailfrm', frm), efc = $$.dc('content', efr).rwText(email);
    $$.dc('axf', efr).append($$.dc('ibtn edit', { title: $rct.frmTT.invoiceemail }).append(gi('pencil')).click({
        t: efc, ccT: ccfc, nme: 'invoiceemail',
        change: (nv) => { rif.tbl.data('new').invoiceemail = nv; },
        changeCc: (nv) => { rif.tbl.data('new').invoiceemailcc = nv; }
    }, $inv.eHtml));
    rif.tbl.data('new').invoiceemail = email;
    rif.tbl.data('new').invoiceemailcc = emailcc;
};

$inv.eHtml = function (ev) {
    /* The recipient address and the service date/period are edited through structured dialogs
       whenever an invoice draft is active; reminders (no invoice draft token) keep the plain
       free-text editor. */
    if (ev.data && !(ev.data instanceof jQuery) && $inv.d && typeof $inv.d.token === 'function' && $inv.d.token() !== '') {
        if (ev.data.nme === 'invoiceaddress') { return $inv.eAddress.call(this, ev); }
        if (ev.data.nme === 'provisionperiod') { return $inv.eProvisionPeriod.call(this, ev); }
    }
    /* The CC/Zusatzempfänger recipient is edited together with the main email, in one dialog —
       there is no separate pencil on the CC row (see $inv.emailFrm). */
    if (ev.data && !(ev.data instanceof jQuery) && ev.data.nme === 'invoiceemail' && ev.data.ccT) { return $inv.eEmail.call(this, ev); }
    let t = $(this), frmct = ev.data instanceof jQuery ? ev.data : ev.data.t;
    /* Single-line fields must stay plain text — the TinyMCE/html editor wraps the value in <p>
       tags, which used to get posted and persisted verbatim (e.g. <p>18.06.2026</p> in the
       Leistungsdatum). The backend sanitises HTML too (single source of truth, ADR 0006), but
       keeping these plain here avoids the UI briefly holding the wrapped value. Multi-line fields
       (invoiceaddress, loc) stay HTML-capable and are normalised to newlines server-side. */
    let isPlainText = ['invoiceemail', 'invoiceemailcc', 'provisionperiod', 'invoicetitle'].includes(ev.data.nme);
    let flds = isPlainText
        ? [{ name: 'txt', label: 'Text', type: 'text', value: frmct.text() }]
        : [{ name: 'txt', label: 'Text', type: 'html', value: frmct.html(), tinymce: true, attr: { style: 'height: 300px' } }];
    let change = ev.data.change || null;
    let sets = {
        title: t.data('dialog') || '',
        success: function (response) {
            if (isPlainText) {
                frmct.text(response.txt || '');
            } else {
                frmct.html(response.txt);
            }
            if (typeof change === 'function') {
                change(response.txt);
            }
            /* backend-authoritative: mirror the inline recipient-field edit to the server session.
               Invoice and reminder editors share this DOM; each syncField no-ops unless its own
               draft token is present, so only the active mode's session receives the delta. */
            $inv.d.syncField(ev.data.nme, isPlainText ? (response.txt || '') : response.txt);
            $inv.rd.syncField(ev.data.nme, isPlainText ? (response.txt || '') : response.txt);
        },
        tinymce: { valid_elements: 'br', hidemenu: true, hidetoolbar: true }
    }
    if (Array.isArray(ev.data.list)) {
        let optf = $$.dc('lstfrm');
        $.each(ev.data.list, (ii, lx) => {
            let li = $$.dc('li', optf).append((ev.data.lbl || '') !== '' ? $$.dc('lbl').rwText(lx[ev.data.lbl]) : null);
            $$.dc('adr', li).rwText(lx[ev.data.property]).data('val', lx[ev.data.property]).click(function () {
                let t = $(this), tgt = t.closest('.modal-body').find(':input[name="txt"]');
                if (tgt.is('.tinymce')) {
                    tinymce.get(tgt.attr('id')).setContent($$.s().rwText(t.data('val')).html());
                } else if (tgt.prop('tagName') === 'TEXTAREA') {
                    tgt.val(t.data('val')).change();
                } else {
                    tgt.rwText(t.data('val'));
                }
            });
        });
        sets.addcontent = optf;
    }
    $ocms.dlgform(flds, sets);
};
/* No client-side arithmetic (ADR 0006/0008): only the chosen VAT rate is stored on each row;
   the server (InvoiceDraftCalculator.RecomputeLineValues) recomputes vat_val/svcvat_val from it. */
$inv.setVat = function (ev) {
    let t = $(this), thisrow = ev.data;
    let vat = prompt($rct.rqV);
    if (vat) {
        vat = parseFloat(vat.replace('%', ''));
        if (vat > 1) {
            vat = vat * 0.01;
        }
        if (isNaN(vat) === false) {
            thisrow.siblings('.itm').each(function () {
                let rwi = $(this), dta = rwi.data();
                dta.vat = fnum(vat, { style: 'percent' }).replace(' ', '');
            });
            $inv.t_fds_inv();
        }
    }
};
$inv.inRow = function (ev) {
    let t = $(this), thisrow = ev.data, dta = {}, flds = $rcol.itm.clone(['SortOrder', 'NameOrNumber', 'Type', 'quantityhours', 'UnitString', 'net', 'svcnet_val', 'svcvat_val', 'net_val', 'vat_val', 'vat', 'Note']);  /* fields without values */
    let nid = 'N' + (((1 + Math.random()) * 0x10000) || 0).toString(16).substr(6), newrow = $$.tr({ id: 'itm_' + nid.toString(), class: 'itm' });
    $ocms.dlgform(flds, {
        title: t.data('dialog') || '',
        success: function (response) {
            newrow.data($.extend({ Id: nid }, dta, response));
            $inv.rrw.call(newrow);
            newrow.insertAfter(thisrow);
            $inv.t_fds_inv();
        }, typedvalues: true
    });
};
$inv.eRow = function (ev) {
    let t = $(this), row = ev.data, dta = row.data() || {}, fnme = ['SortOrder', 'NameOrNumber', 'Type', 'quantityhours', 'UnitString', 'net', 'svcnet_val', 'svcvat_val', 'net_val', 'vat_val', 'vat', 'Note'];
    if (!dta.id && (dta.Type || '') === '') {
        fnme.unshift('Type');
    }
    let flds = $rcol.itm.clone(fnme).applyValues(dta);
    flds.set('Type', 'hidden', 'type');
    $inv.eRw.call(t, row, dta, flds);
};
$inv.eRw = function(row, dta, flds) {
    let t = $(this);
    $ocms.dlgform(flds, {
        title: t.data('dialog') || '',
        success: function (res) {
            let d = {}
            if ((dta.Id || '') === '') {
                d.Id = 'N' + (((1 + Math.random()) * 0x10000) || 0).toString(16).substr(6);
                row.attr('id', 'itm_' + d.Id.toString());
            }
            d.quantity = ((res.quantityhours ||'').toString() + ' ' + (res.UnitString || '').toString()).trimEnd();
            row.data($.extend({}, dta, res, d));
            console.debug('eRw success %o', row.data());
            $inv.rrw.call(row);
            $inv.t_fds_inv();
        }, typedvalues: true
    });
};
/* Reorder items via drag. The DOM swap happens inside the Sortable during the drag; we commit
   the new order once, reliably, on drop (onend) — that recomputes positions/totals and pushes the
   changed block(s) to the backend session (t_fds_inv -> syncChanged). Committing on drop (rather
   than on every mid-drag hover-swap) avoids rebuilding the row that is currently being dragged. */
$inv.bdysort = (i, e) => { $(e).Sortable({ dragItem: false, dragHandleClass: 'ico', parentident: 'tr', onend: () => { $inv.t_fds_inv(); } }) }
/* Single "Kontext-Button" per row/field, opening a dropdown of the row's edit actions
   (reuses $ocms.menu, the same mechanism that already drives the toolbar menus — see
   $inv.eM/$inv.iMn). Calling .ocmsmenu() directly on a <nav> we built ourselves (rather than
   letting $ocms.menu create one inside a bar) keeps our own sizing class instead of being
   replaced. Every entry carries both its label and a matching `title` tooltip. */
$inv.rowCtxMenu = function (items) {
    let nav = $$[0]('nav').aC('rowctx');
    nav.ocmsmenu([{ glyph: 'glyphicon-option-vertical', aclass: 'ctxbtn', attr: { title: $rct.ctxM }, itm: items }]);
    /* $ocms.menu puts `attr` (incl. our title tooltip) on the <li>, not the <a> a viewer actually
       hovers — mirror it onto the <a> too so the native tooltip is guaranteed to fire regardless
       of how the browser resolves title on a non-interactive ancestor. */
    nav.find('li[title]').each(function () { let li = $(this); li.children('a').attr('title', li.attr('title')); });
    return nav;
};
$inv.rrw = function () {
    let rw = $(this), dta = rw.data(), co = {}, ph = rw.is('.placeholder'), hn = rw.is('.hidenote');
    let oHtml = (e) => $$.d().append(e).html();
    let mi = [
        { lbl: $rct.iRb, attr: { title: $rct.iRb }, data: rw, fnc: $inv.inRow }
    ];
    if (ph === false) {
        mi.unshift({ lbl: $rct.cP, attr: { title: $rct.cP }, data: rw, fnc: $inv.eRow });
        mi.push({ lbl: $rct.dR, attr: { title: $rct.dR }, fnc: function (e) { if (confirm($rct.cD)) { rw.remove(); $inv.t_fds_inv(); } } });
        /* "Auf Setpreis umstellen": offered on a Set header item that does not yet carry a
           price. fds__prepInvoice's [SetItmId] now anchors on the still-unconverted (price 0)
           header, so the header row's own SetItmId self-references its own id rather than being
           null — the real signal for showing this button is still the header's own price/net_val
           being 0 (once converted it carries a nonzero price and the button disappears).
           Irreversible: the actual sum/clear mutation happens server-side (backend-authoritative,
           see InvoiceDraftEditService.ApplyItemSetPrice) via the "item.setprice" patch target. */
        if ((dta.Type || '').toLowerCase() === 'set' && (dta.net_val || 0) === 0) {
            mi.push({ lbl: $rct.toSetP, attr: { title: $rct.toSetP }, data: rw, fnc: $inv.toSetPrice });
        }
    }
    let axf = $$.dc('axf').append($inv.rowCtxMenu(mi));
    if (ph === true) {
        co = { id: '', typ: 'placeholder' };
    } else if (rw.is('.itm.osum') === true) {
        co = { invrqid: dta.InvRqId, id: 'osum' + rw.index(), typ: 'osum', p: '', q: null, t: oHtml(dta.tbl.tbl), tt: null, v: null, vt: dta.net_val, vs: dta.svcnet_val, vat: dta.vat, vv: dta.vat_val, vsv: dta.svcvat_val, det: false };
    } else {
        co = { invrqid: dta.InvRqId, id: dta.Id || '', typ: dta.Type || 'other', p: '', q: null, t: '', tt: null, v: null, vt: dta.net_val, vs: dta.svcnet_val, vat: dta.vat, vv: dta.vat_val, vsv: dta.svcvat_val, det: (dta.Note || '') !== '' && hn === false, SetItmId: dta.SetItmId || null, lvl: (dta.lvl || 0) };
        $$.dc('ibtn ico move', axf, { title: $rct.mR }); /* should be the last added */

        /* dta.position is '' (not unset) for a Text/Title row once invSumUpdate has numbered the
           invoice (ADR 0017) — an intentional "no number", not a missing value, so it must NOT
           fall through to SortOrder (which is -1 for such rows and would leak "-1" into Pos.).
           Only an as-yet-uncomputed row (freshly inserted, before the next invSumUpdate pass)
           has position === undefined and should still fall back to SortOrder as a placeholder. */
        co.p = dta.position != null ? dta.position : (dta.SortOrder || '');
        if (co.id === '') {
            co.t = '';
        } else if (['Text', 'Title'].includes(co.typ) && (dta.net_val || 0) === 0) {
            co.t = dta.htmltext || (((dta.NameOrNumber || '').substr(0, 1) !== '#' ? oHtml($$[0]('p').text(dta.NameOrNumber)) : '') + (dta.Note || ''));
        } else {
            co.tt = co.det ? '' : $$.s(dta.Note || '').text();
            co.q = dta.quantity || ((dta.quantityhours || 0) !== 0 ? (fnum(dta.quantityhours) + ' ' + (dta.UnitString || '')) : '');   /* guard: no quantityhours -> blank, not fnum(undefined)="NaN" (e.g. the block set row) */
            co.t = dta.htmltext ||(co.det ? (oHtml($$.s(dta.NameOrNumber || '')) + oHtml($$.dc('desc').html(dta.Note))) : oHtml($$.s(dta.NameOrNumber || '')));
            co.v = dta.net
            co.vt = dta.net_val
        }
    }
    if ((dta.Note || '') !== '') {
        $$.dc('ibtn add', axf, { title: $rct.noteToggle }).append(gi('object-align-left')).click(function (e) {
            $inv.rrw.call(rw.tC('hidenote'));
        });
    }
    let tda = [
        $$.tdc('aux').append(axf),
        $$.tdc('keep').text(co.p)
    ];
    if (co.id === '') {
        tda.push($$.td(rw, { colspan: 4 }).append(co.t));
    } else {
        Array.prototype.push.apply(tda, co.q ? [$$.tdc('keep').text(co.q)] : []);
        /* ADR 0009: a null/undefined price renders an EMPTY cell (block-mode "Set mit Preis"
           members, and the set row's own unit-price), distinct from a real 0,00 €. */
        let cur = (x) => (x == null ? '' : fnum(x, $rct.cst));
        Array.prototype.push.apply(tda, [
            $$.tdc('txt', { colspan: !co.q ? 2 : 1, title: co.tt }).append(co.t),
            $$.tdc('currency').text(cur(co.v)),
            $$.tdc('currency inetval').text(cur(co.vt)).attr('title', $rct.svcPart + ': ' + cur(co.vs))
        ]);
    }
    rw.empty().attr('class', ph ? 'placeholder' : 'itm').aC(co.Typ)
        .tC('sethdr', (co.typ || '').toString().toLowerCase() === 'set')   /* emphasise set rows (fn1 header + block set row) */
        .aC((co.lvl || 0) > 0 ? 'lvl' + Math.min(co.lvl, 6) : '')          /* indent nested set members (ADR 0016) */
        .tC('hidenote', hn).append(tda);
    dta.co = co;
};
/* "Auf Setpreis umstellen" (see $inv.rrw): backend-authoritative (ADR 0006) — the browser only
   posts the target set-header item id; the server (InvoiceDraftEditService.ApplyItemSetPrice)
   sums the member rows (same block, [SetItmId] equal to this row's id), writes that sum onto
   the set header and clears each member's price, then the normal draftReady refresh re-renders
   both the header and its members from the authoritative session state. This mirrors the PDF's
   read of the same cached session, so the online editor and PDF can never drift apart. */
$inv.toSetPrice = function (ev) {
    let rw = ev.data, dta = rw.data(), id = (dta.Id || '').toString();
    if (id === '') { return; }
    if (confirm($rct.toSetPc) === false) { return; }
    /* Wait for the flush of any pending local edits to actually reach the server before sending
       the conversion delta — sending both in parallel let a delayed block.replace (still carrying
       the pre-conversion, zero member/header values) land after item.setprice and silently
       overwrite the just-converted totals back to 0. */
    $.when($inv.t_fds_inv()).done(() => { $inv.d.sync({ Target: 'item.setprice', Ref: id }); });
};
/* No client-side totals/footer/tax computation (ADR 0006/0008): this only re-assembles each
   block's row contract array (needed to post the "req" shape to the server) and, on the very
   first pass, seeds the authoritative backend session. Footer, VAT breakdown, service-refund
   note figures and the per-block sum cell are never computed here — they are rendered exclusively
   from the server's `dstate` response by $inv.d.footer / $inv.d.applyState once the draft has a
   token. Before a token exists the footer/notes/isum cells are simply left empty; there is no
   local approximation to display. */
$inv.invSumUpdate = function () {
    let tbl = $(this);
    let ba = [];
    let bds = tbl.children('tbody');
    /* Hierarchical position numbering (ADR 0017), spanning the whole invoice: a running counter
       per nesting depth, ported from InvoiceLineNumbering.Compute. A set header gets a number at
       its own level ("3"); its members get subsidiary numbers one level deeper ("3.1", "3.2"). A
       row's numbering never depends on the MFR SortOrder value — including for a Text/Title
       header row synced with SortOrder -1, which used to leak "-1" straight into the Pos. column
       here because it never went through this loop at all. */
    let posCounters = [];
    let nextPositionLabel = (numbered, lvl) => {
        if (!numbered) { return ''; }
        let l = Math.max(lvl || 0, 0);
        while (posCounters.length <= l) { posCounters.push(0); }
        posCounters.length = l + 1;
        posCounters[l]++;
        return posCounters.join('.');
    };
    bds.each((bi, bdy) => {
        let b = $(bdy), rx = b.data() || {}, i = [], citems = [], itm = b.find('tr.itm');
        b.tC('empty', itm.length < 1);
        itm.each((ti, tx) => {
            let rrx = $(tx).data() || {};
            i.push(rrx.co);
            /* backend item contract (title/desc/qty/price_net/total_net + set flags), see InvoiceSetPricing.
               Set grouping: fds__prepInvoice computes [SetItmId] per item, anchored on the still-unconverted
               (price 0) Set header that owns it — this is the authoritative membership signal (not row order),
               so items not tagged with a SetItmId by the server are never swept into a preceding set. The
               header row's own SetItmId self-references its own id, but it is never its own member (excluded
               by the id !== '' && !== citem.id check below). */
            let citem = $inv.itemToContract(rrx);
            let sid = (rrx.SetItmId || '').toString();
            /* a nested set (ADR 0016) is itself a member of its parent set, so the type is not excluded here */
            if (sid !== '' && sid !== citem.id) { citem.setId = sid; }
            citems.push(citem);
            let numbered = ['text', 'title'].includes((rrx.Type || 'other').toLowerCase()) === false;
            rrx.position = nextPositionLabel(numbered, (rrx.co || {}).lvl || 0);
            $inv.rrw.call(tx);
        });
        ba.push({ Id: rx.Id, nme: rx.Name, text: rx.text, itm: i, items: citems });
    });
    let nonempty = tbl.find('tbody:not(.empty)').length;
    bds.find('tr.isum').tC('hidden', nonempty < 2);
    tbl.data('bai', ba);
    /* Backend-authoritative seeding (ADR 0006): on the first calculation of an invoice
       draft (invSumUpdate is only bound for invoices, never reminders), hand the assembled
       model to the server session and switch to server-driven totals from then on. */
    if ((tbl.data('dtoken') || '') === '' && bool(tbl.data('dseeding'), false) === false && ((tbl.data('admin') || {}).type != null)) {
        tbl.data('dseeding', true);
        $inv.d.seed($.extend($inv.invcPayload(tbl.data()), { invid: tbl.data('invid') || '' }));
    }
};
$inv.worknotes = function (rx) {
    let wn = '';
    rx.steps.forEach((s, si) => {
        let flds;
        try {
            flds = JSON.parse(s.Data || {}).fields || [];
        } catch (e) {
            console.debug(e);
            flds = [];
        }
        if (Array.isArray(flds || '') !== true) {
            if (typeof flds === 'object' && Array.isArray(flds.field || '') === true) {
                flds = flds.field;
            } else {
                flds = [];
            }
        }
        flds.forEach((v, si) => {
            if (v.name === 'Ausgeführte Arbeiten') {
                wn = v.result || '';
            }
        });
    });
    return wn;
};
$inv.rendersrq = function () {
    let bdy = $(this).empty(), onesum = bdy.is('.onesum');
    let rx = bdy.data();
    //if (ri > 0) {
    //    $$.tr(bdy).aC('sep nosort').append($$.td({ colspan: 6 }));
    //}
    let rtr = $$.tr(bdy, { id: 'srq' + rx.Id }).aC('title nosort'), cl = $rcol.itm.lbl();
    let aux = $$.dc('axf').appendTo($$.tdc('aux', rtr));
    $$.dc('ibtn osum', aux, { title: $rct.combP }).append(gi('euro')).click(function (e) {
        bdy.tC('onesum');
        $inv.rendersrq.call(bdy);
        $inv.t_fds_inv();
    });
    $$.dc('ibtn setvat', aux, { title: $rct.sV }).append(gi('gbp')).click(rtr, $inv.setVat);
    $$.dc('ibtn insb', aux, { title: $rct.iRb }).append(gi('indent-left')).click(rtr, $inv.inRow);
    let stxt = $$.sc('text', rx.text);
    let nme = $$.td(rtr, { colspan: onesum ? 4 : 5 }).append(stxt), oidta, numkeys = ['net_val', 'vat_val', 'svcnet_val', 'svcvat_val', 'net'];
    $$.dc('ibtn edit', aux, { title: $rct.sectionTitleEditTT }).data('dialog', $rcol.req.lbl().Name).append(gi('pencil')).click({ t: stxt, change: (nv) => { rx.text = nv; $inv.t_fds_inv(); } }, $inv.eHtml)
    if (onesum) {
        $$.tdc('currency isumval', rtr);
        oidta = { Id: rx.Id.toString() + '_osum', net_val: 0, vat_val: 0, svcnet_val: 0, svcvat_val: 0, net: 0 };
        oidta.tbl = $$.tblset({ class: 'stbl' });
    }
    $.each(rx.items || [], (ii, ix) => {
        let itr, idta = { Id: ix.Id, net_val: ix.net_val || 0, vat_val: ix.vat_val || 0, svcnet_val: 0, svcvat_val: 0, net: ix.net || 0, Note: ix.Note || '' };
        switch (ix.Type.toLowerCase()) {
            case 'service':
                idta.svcnet_val = ix.net_val || 0;
                idta.svcvat_val = ix.vat_val || 0;
        }
        if (onesum) {
            itr = $$.tr(oidta.tbl.bdy, { id: 'itm' + ix.Id, class: 'sitm' }).aC(ix.Type);
            if (ix.Type === 'Text' || ix.Type === 'Title') {
                $$.td(itr, { colspan: 2 }).html(ix.htmltext || ix.Note);
            } else {
                $$.tdc('keep', itr).text(ix.quantity || ((ix.quantityhours || 0) > 0 ? fnum(ix.quantityhours) + (ix.UnitString || '').eine(' ','') : ''));
                if (ix.htmltext) {
                    $$.tdc('txt', itr).html(ix.htmltext);
                } else {
                    $$.tdc('txt', itr).text(ix.NameOrNumber).attr('title', ix.Note);
                }
            }
            $.each(numkeys, (k, ky) => { oidta[ky] += idta[ky]; });
            itr.data(idta);
        } else {
            $.extend(idta, ix);
            itr = $$.tr(bdy, { id: 'itm' + ix.Id, class: 'itm' });
            itr.data(idta);
            $inv.rrw.call(itr);
        }
    });
    if (onesum) {
        let oi = $$.tr(bdy, { id: 'itmsq' + rx.Id, class: 'itm osum' }).data(oidta);
        $inv.rrw.call(oi);
    } else {
        let istr = $$.tr(bdy).aC('isum nosort');
        $$.tdc('aux', istr);
        $$.td(istr, { colspan: 4 }).text($rct.iSum);
        $$.tdc('currency isumval', istr);
    }
};
$inv.t_fds_inv = () => {
    let tbl = $('div.invoice_layout table.invi');
    tbl.trigger('fds.inv');
    /* After any local item mutation, push the changed block(s) to the authoritative
       server session as granular deltas (invoice drafts only — reminders have no token,
       nor a 'dseedpromise', so they correctly fall through to the no-op). While the initial
       seed (inv/dopen) is still in flight there is no token yet either, but a 'dseedpromise'
       is pending — wait for it instead of skipping the flush, otherwise an edit made in that
       brief window is silently never sent. Returns the flush promise so callers that must
       sequence a follow-up server delta after this flush (e.g. $inv.toSetPrice) can wait for
       it instead of racing it. */
    if ((tbl.data('dtoken') || '') !== '') { return $inv.d.syncChanged(tbl); }
    let seeding = tbl.data('dseedpromise');
    return seeding ? $.when(seeding).then(() => $inv.d.syncChanged(tbl)) : $.when();
};
$inv.sedit = () => {
    $inv.sprev(true);
};
$inv.jdisp = function (ev) {
    ev.stopPropagation();
    if (ev.data.id) {
                $inv.disp(ev.data.id, (ev.data.typ ||''));
    }
}
$inv.disp = (id, typ) => {
    let u = '';
    switch (typ) {
        case 'inv':
            u = 'inv/rdoc';
            break;
        case 'rem':
            u = 'rem/rdoc';
            break;
    }
    if (u !== '') {
        $ocms.postXT({
            url: $ocms.url(u), data: { id: id || '', typ: 'img' }, success: (response) => {
                let c = $$.dc('imagecollection pdfpreview'), vhr = Math.round(vh() * 0.88), invid = response.id;
                $.each(response.img || [], function (ii, img) {
                    $$.dc('pdfp', c).append($$.img(img).css('max-height', (vhr - rpx(6)).toString() + 'px'));
                });
                $ocms.dlg(c, {
                    size: [vhr, Math.round(vw() * 0.88)], zindex_min: 50, form: false, exclusive:false
                });
            }
        });
    }
};
$inv.jdbn = function (ev) {
    $ocms.postXT({
        url: $ocms.url('inv/rdocn'), data: { name: ev.data.id || '', typ: 'img' }, success: (response) => {
            let c = $$.dc('imagecollection pdfpreview'), vhr = Math.round(vh() * 0.88), invid = response.id;
            $.each(response.img || [], function (ii, img) {
                $$.dc('pdfp', c).append($$.img(img).css('max-height', (vhr - rpx(6)).toString() + 'px'));
            });
            $ocms.dlg(c, {
                size: [vhr, Math.round(vw() * 0.88)], zindex: 50, form: false
            });
        }
    });
};
$inv.sp13b = () => {
    var l = $('div.invoice_layout'), tbl = l.find('table.invi'), d = tbl.data();
    d.admin.p13b = true;
    if ((d.inv.InvoiceOptions || '').split(',').includes('§13b') === false) {
        d.inv.InvoiceOptions += ',§13b';
    } else {
    }
    tbl.trigger('fds.inv');
    $inv.d.sync({ Target: 'p13b', Value: d.admin.p13b });
};
/* Maps an item row's data to the backend item contract consumed by InvoiceSetPricing
   / FuchsPdf.ApplyInvoice: { id, type, title (plain), desc (html), qty, price_net,
   total_net, vat }. Set membership (type:'set' header + setId on members) is added by
   the caller. The invoice total comes from the registration balance, so per-item
   totals here are purely presentational. */
$inv.itemToContract = function (rrx) {
    rrx = rrx || {};
    let oHtml = (e) => $$.d().append(e).html();
    let type = (rrx.Type || '').toString().toLowerCase();
    /* ADR 0009: preserve null prices verbatim (null = empty cell, kept distinct from a real 0) so
       block-mode nulled members and the set row round-trip unchanged when the block is re-posted. */
    let nz = (x) => (x == null ? null : x);
    let ci = { id: (rrx.Id || '').toString(), type: type, title: '', desc: '', qty: '', price_net: '', total_net: nz(rrx.net_val), vat: rrx.vat || '' };
    if (rrx.co && rrx.co.typ === 'osum') {
        /* combined single-sum line — the on-screen "title" is an HTML sub-table; render it as desc */
        ci.desc = rrx.co.t || '';
        ci.total_net = (rrx.net_val || 0);
    } else if (['text', 'title'].includes(type) && (rrx.net_val || 0) === 0) {
        /* heading / free-text line, no price */
        ci.desc = rrx.htmltext || ((((rrx.NameOrNumber || '').substr(0, 1) !== '#') ? oHtml($$[0]('p').text(rrx.NameOrNumber || '')) : '') + (rrx.Note || ''));
        ci.total_net = '';
    } else {
        /* normal priced item (incl. set headers, which carry their own set price or 0).
           Mirrors the "itm"/co.t fallback above: when the row only carries pre-built
           htmltext (no separate NameOrNumber/Note), use it as desc so the PDF isn't left
           without a description for these rows. */
        if (rrx.htmltext) {
            ci.desc = rrx.htmltext;
        } else {
            ci.title = rrx.NameOrNumber || '';
            ci.desc = rrx.Note || '';
        }
        ci.qty = rrx.quantity || ((rrx.quantityhours || 0) !== 0 ? (fnum(rrx.quantityhours) + (rrx.UnitString ? ' ' + rrx.UnitString : '')) : '');
        ci.price_net = nz(rrx.net);
        ci.total_net = nz(rrx.net_val);
    }
    return ci;
};
/* 2-way set-pricing display switch (SetPrice / SetOnly). Mirrors §13b: writes the choice onto
   admin.setmode, which BuildInvoiceParams turns into the "setmode:<mode>" InvoiceOptions token
   the PDF reads. ItemPrices ("Positionen mit Preis – Set als Überschrift") was removed: it was
   always just the implicit pre-conversion default and is not a state the user can switch back to
   once a set has been converted via the "Auf Setpreis umstellen" item switch (see $inv.toSetPrice /
   InvoiceDraftEditService.ApplyItemSetPrice) — that conversion is one-way. */
$inv.ssetmode = () => {
    let l = $('div.invoice_layout'), tbl = l.find('table.invi'), d = tbl.data();
    d.admin = d.admin || {};
    let cur = (d.admin.setmode || 'setprice'), o;
    let btn = (mode) => $$.dc('btn', $ict.setmo[mode]).tC('selected', cur === mode).click(() => { o.c.trigger('modal_close'); $inv.setSetmode(mode); });
    let fr = $$.dc('choicefrm').append([btn('setprice'), btn('setonly')]);
    o = $ocms.dlg(fr, { width: 800 });
};
/* "Set mit Preis" / "Nur Set mit Preis" (ADR 0009): NOT a display toggle — an irreversible,
   backend-authoritative mutation grouped by service-request block. The server inserts a dedicated
   set row per block (block sum) and either nulls each member's price (setprice) or removes the
   members (setonly); the normal draftReady refresh re-renders both via $inv.d.applyItems. The
   browser only posts the chosen mode. Flush pending local edits first so a delayed block.replace
   can't land after the conversion and overwrite it (same race guard as $inv.toSetPrice). */
$inv.setSetmode = (mode) => {
    if (confirm($rct.toSetMc || $rct.toSetPc) === false) { return; }
    let target = (mode === 'setonly') ? 'block.setonly' : 'block.setprice';
    $.when($inv.t_fds_inv()).done(() => { $inv.d.sync({ Target: target }); });
};
$inv.sctp = () => {
    let flds = $invcol.ctp;
    $ocms.dlgform(flds, {
        title: $ict.ctp,
        success: function (response) {

            var l = $('div.invoice_layout'), tbl = l.find('table.invi'), d = tbl.data();
            let cvo = {};
            if (typeof d.new !== 'undefined' && (d.new.CustomValues || '').substr(0, 1) === '{') {
                cvo = JSON.parse(d.inv.CustomValues);
            }
            cvo.contactName = response.name;
            cvo.contactEmail = response.email;
            d.new.CustomValues = JSON.stringify(cvo);  //Assign it to new Values so that this is submitted also
            l.find('.ctpfrm').text(ne(response.name, response.email));
            $inv.d.sync({ Target: 'contact', Value: { name: response.name, email: response.email } });

        }, typedvalues: true
    });
};
/* Normalises the editor's working model into the exact field names the C# backend
   (FdsInvoiceData.BuildInvoiceParams) reads, then returns the `invc` payload. No totals/VAT
   are computed here (ADR 0006/0008: the online editor performs no arithmetic at all) — the
   backend session computes total_net/total_gross/vat itself (InvoiceDraftCalculator) once
   opened from this payload, and BuildFdsData/BuildInvoiceParams reads them from there:
   - new.invoicetitle -> new.title, new.loc -> new.provisionlocation, admin.paymentterms ->
     new.paymentterm, admin.CustomerId -> admin.customerid.
   Originals are kept alongside; the source objects are not mutated. */
$inv.invcPayload = function (d) {
    d = d || {};
    let nw = $.extend({}, d.new), adm = $.extend({}, d.admin);
    nw.title = (nw.invoicetitle != null ? nw.invoicetitle : (nw.title || ''));
    nw.provisionlocation = (nw.loc != null ? nw.loc : (nw.provisionlocation || ''));
    nw.paymentterm = (adm.paymentterms != null ? adm.paymentterms : (nw.paymentterm || ''));
    adm.customerid = (adm.customerid != null ? adm.customerid : adm.CustomerId);
    return { admin: adm, req: d.bai, new: nw };
};
/* Zwischenspeichern and preview now run against the backend-authoritative session
   (ADR 0006): no full-invoice re-upload — the cached draft is flushed / rendered by
   token. See $inv.d.save / $inv.d.preview. The finalise + email path (req/sconf) is
   unchanged and is invoked from the preview modal's confirm handler. */
$inv.ssave = () => { $inv.d.save(); };
$inv.sprev = (change) => { $inv.d.preview(); };
$inv.rReload = () => {
    try {
        let s = $('#listframe ul.rql:first').data();
        $inv.cInv2({ id: s.search });
    } catch (e) { }
};
/* No client-side arithmetic (ADR 0006/0008): quantity/price/VAT edits are posted as raw values
   and the server (InvoiceDraftCalculator.RecomputeLineValues) computes net_val/vat_val/
   svcnet_val/svcvat_val. The fields are left as entered here; the authoritative values are
   pushed back onto the row by $inv.d.applyItems once the change reaches the backend. */
$inv.quantChange = function (i) { };
$inv.storno = function (id, fds) {
    let o, fr = $$.dc('choicefrm').append([
        $$.dc('btn', 'Storno ohne Details').click({ id: id, mode: 'simple' }, (ev) => { o.c.trigger('modal_close'); $inv.cSt(ev.data); })
        , $$.dc('btn', 'Storno mit neuer Rechnung').click({ id: id }, (ev) => { o.c.trigger('modal_close'); $inv.ccStInv(ev); })
        , $$.dc('btn', 'Storno mit best. Rechnung').tC('inactive', bool(fds, false) === false).click({ id: id, mode: 'copy' }, (ev) => { if (bool(fds, false) === true) { o.c.trigger('modal_close'); $inv.cSt(ev.data); }})
    ]);
    o = $ocms.dlg(fr, { width: 1000 });
};
$inv.credit = function (id, fds) {
    let o, fr = $$.dc('choicefrm').append([
        $$.dc('btn', 'Gutschrift').click({ id: id, mode: 'credit' }, (ev) => { o.c.trigger('modal_close'); $inv.cSt(ev.data); })
    ]);
    o = $ocms.dlg(fr, { width: 1000 });
};
$inv.setPyd = function (id) { // set invoice payed
    if (confirm($ict.cpyd)) {
        $ocms.postXT({
            url: $ocms.url('inv/setpyd'), timeout: 60, data: { id: id }, success: (response) => {
                alert($ict.relm);
            }, error: () => {
                alert($t.f1);
            }
        });
    }
};
$inv.setUpd = function (id) { // set invoice payed
    if (confirm($ict.cupd)) {
        $ocms.postXT({
            url: $ocms.url('inv/setupd'), timeout: 60, data: { id: id }, success: (response) => {
                alert($ict.relm);
            }, error: () => {
                alert($t.f1);
            }
        });
    }
};
$inv.resendRem = function (ev) {
    ev.stopPropagation();
    if (ev.data.id && confirm(string($ict.remresc, [ev.data.name]))) {
        $ocms.postXT({
            url: $ocms.url('rem/resend'), timeout: 60, data: { id: ev.data.id }, success: (response) => {
                alert(string($ict.remresr, [ev.data.name]));
            }, error: () => {
                alert($t.f1);
            }
        });
    }
};
$inv.dspRem = function (id) {  //reminder creation
    let fr = $$.dc('rfrm').ldng(1);
    let o = $ocms.dlg(fr, { width: 1000 });
    o.ft.rwText($rct.rq2);
    $ocms.postXT({
        url: $ocms.url('inv/getrem'), timeout: 60, data: { id: id, drafts: false }, success: (response) => {
            o.ft.empty();
            let ts = $$.tblset({ class: 'invtbl'}, fr.empty()), fd = $invcol.rem2;
            let thr = $$.tr(ts.hd), haux = $$.th(thr);
            $.each(fd.fields || [], (ci, cx) => {
                $$.th(thr).text(cx.label);
            });
            let cst = false;
            $.each(response, (ri, rw) => {
                cst = !cst;
                let tr = $$.tr(ts.bdy).tC('alt', cst), raux = $$.td(tr);
                tr.click(function () {
                    tr.tC('selected').siblings().rC('selected');
                });
                if (bool(rw.hasFile, false)=== true) {
                    $$.dc('idl ilbtn', raux, { title: $ict.dl + '\n' + rw.DocumentName }).append(gi('save-file', 'ico')).click({ id: rw.Id }, $inv.downloadrem);
                    $$.dc('idl ilbtn', raux, { title: $ict.remdsp + '\n' + rw.DocumentName }).append(gi('eye-open', 'ico')).click({ id: rw.Id, typ: 'rem' }, $inv.jdisp);
                    $$.dc('idl ilbtn', raux, { title: $ict.remres + '\n' + rw.DocumentName }).append(gi('refresh', 'ico')).click({ id: rw.Id, typ: 'rem', name: rw.DocumentName }, $inv.resendRem);
                }
                $.each(fd.fields || [], (ci, cx) => {
                    let td = $$.td(tr).aC(cx.dtype), val = rw[cx.name];
                    if (typeof cx.dfnc === 'function') {
                        cx.dfnc.call(td, val, rw);
                    } else {
                        switch (cx.type || '') {
                            case 'date':
                                td.text(fdt(rw[cx.name], 'dd.MM.yy'));
                                break;
                            case 'datetime':
                                td.text(fdt(rw[cx.name]));
                                break;
                            case 'html':
                                td.append($$.dc('ctw').html(val));
                                td.append($$.dc('ttip').html(val));
                                break;
                            default:
                                td.text(rw[cx.name]);
                        }
                    }
                    switch (cx.name || '') {
                        case 'InvoiceId':
                            td.aC('keep');
                            break;
                    }
                    switch (typeof cx.title) {
                        case 'function':
                            cx.title.call(td, rw);
                            break;
                        case 'string':
                            td.attr('title', cs.title);
                    }
                });
            });
        }, error: () => {
            fr.empty();
            o.ft.rwText($t.f1);
        }, complete: () => {
            fr.ldng(0);
        }
    });
};
$inv.ccRem = function (id, InvoiceId) {  //reminder creation
    let t = $(this);
    $ocms.postXT({
        url: $ocms.url('rem/lrem'), timeout: 60, data: { id: id }, success: (response) => {
            let flds = $invcol.rid.clone();  /* fields without values */
            flds.applyValues(response.ov);
            let ac = $$.dc('ac'), tbl = $$.tblset({class: 'fullgrid fullwidth'}, ac);
            if ((response.lst || []).length > 0) {
                $$.d({ 'style': 'margin: 1.5rem 0 1rem 0;font-size: 110%;text-decoration: underline;'}).prependTo(ac).text($ict.rovlh);
                let trh = $$.tr(tbl.hd);
                $ict.rovl.forEach((f, n) => $$.th(trh, f));
                $.each(response.lst, (ri, rw) => {
                    let tr = $$.tr(tbl.bdy);
                    tr.append([$$.tdc('keep', rw.subject), $$.tdc('currency', fnum(rw.amount, $rct.cst)), $$.tdc('currency', fnum(rw.amount_payed, $rct.cst)), $$.tdc('keep', fdt(rw.DateFinalized, 'dd.MM.yy'))]);
                });
            } else {
                $$.td($$.tr(tbl.bdy), $ict.nd);
            }
            $ocms.dlgform(flds, {
                addcontent: ac,
                title: string($ict.remdt, [InvoiceId || '?']),
                success: function (sets) {
                    $inv.ccRem_s2(id, sets);
                }, typedvalues: true
            });
        }
    });
};
$inv.rRemRw = function (dta) {
    let tr = $(this), rem = dta.rm || {};
    tr.empty().data({ invoiceid: rem.invoiceid, invoicedate: rem.invoicedate, amount: rem.amount, amount_payed: rem.amount_payed });
    let mi = [{ lbl: $rct.cP, attr: { title: $rct.cP }, data: tr, fnc: $inv.eRowR }];
    let axf = $$.dc('axf').append($inv.rowCtxMenu(mi));
    tr.append([$$.tdc('aux').append(axf), $$.tdc('keep', rem.invoiceid), $$.tdc('keep', fdt(rem.invoicedate, 'dd.MM.yy')), $$.tdc('currency', fnum(rem.amount, $rct.cst)), $$.tdc('currency', fnum(rem.amount_payed, $rct.cst)), $$.tdc('currency', fnum(rem.amount - rem.amount_payed, $rct.cst))]);
};
$inv.eRowR = function (ev) {
    let t = $(this), row = ev.data, dta = row.data() || {};
    let flds = $invcol.rem.clone().applyValues(dta);
    $ocms.dlgform(flds, {
        title: t.data('dialog') || '',
        success: function (res) {
            let tbl = t.closest('table'), tdta = tbl.data();
            $.extend(tdta.rm, res);
            tbl.data(tdta);
            $inv.rRemRw.call(row, tdta);
            /* backend-authoritative: mirror the edited amount / amount-paid to the server session */
            $inv.rd.syncAmount(tdta.rm.amount, tdta.rm.amount_payed);
        }, typedvalues: true
    });
};
$inv.ccRem_s2 = function (id, sets) {  //reminder creation
    let lf = $fis.lf(false).rC('fix').aC('hd'), frm = $$.dc('invoice_layout', $fis.frm_edit()).append($$.dc('btn sprev').click($inv.rprev));
    $inv.eM(false, true);
    let fr = $$.dc('rfrm').ldng(1);
    //let o = $ocms.dlg(fr, { width: 1000 });
    //o.ft.rwText($rct.rq2);
    $ocms.postXT({
        url: $ocms.url('rem/get'), timeout: 60, data: $.extend({ id: id }, sets), success: (response) => {
            //console.debug(response);
            let rem = response.rm || {};
            let rq = $$.dc('srq', frm);
            /* Intro/closing notice paragraphs are backend-authoritative (see $inv.rd.notes,
               populated from FuchsPdf.BuildReminderNotes via rem/dstate after seeding below) —
               they are appended/prepended into this same .srq container once the draft session
               is open, so no client-side wording is constructed here. */
            let rif = $$.tblset({ class: 'invi' }, rq);
            rif.ft = $$[0]('tfoot');
            rif.tbl.data($.extend({ invid: rem.invid, new: {} }, response));
            let thr = $$.tr(rif.hd).aC('shd').append([$$.th().aC('aux')]);  /*  header row for items */
            $ict.remHR.forEach(h => $$.th(thr, h));
            $inv.rRemRw.call($$.tr(rif.bdy), rif.tbl.data());
            rif.ft.appendTo(rif.tbl);

            /* Reminders have no CC/Zusatzempfänger field (see $inv.emailFrm, invoice-only), so the
               email pencil here keeps a plain tooltip instead of $rct.frmTT.invoiceemail. */
            let remTT = { invoiceemail: 'Email-Adresse ändern', subject: 'Betreff ändern' };
            let fm = (cls, txt, nme, hd, dta) => {
                let fr = $$.dc('inpfrm', frm).aC(cls).append(typeof hd === 'string' ? $$.dc('ahd', hd) : (hd > 0 ? $$.dc('ahd', $rct.frm[nme]) : null)), fc = $$.dc('content', fr).rwText(txt);
                $$.dc('axf', fr).append($$.dc('ibtn edit', { title: remTT[nme] || $rct.frmTT[nme] || $rct.frm[nme] }).data('dialog', $rct.frm[nme]).append(gi('pencil')).click($.extend({ t: fc, nme: nme, change: (nv) => { rif.tbl.data('new')[nme] = nv; } }, dta), $inv.eHtml));
                rif.tbl.data('new')[nme] = txt;
            };
            fm('tfrm', rem.subject, 'subject', 0, null);
            fm('adrfrm', rem.invoiceaddress, 'invoiceaddress', 0, null);
//            fm('locfrm', rem.ProvisionLocation, 'loc', 1, null);
            fm('emailfrm', rem.invoiceemail, 'invoiceemail', 0, null);
            $$.dc('sndfrm', frm).append($$.dc('content').text(rem.sender));

            //adm = $$.dc('admfrm', frm), admc = $$.dc('content', adm),

            rif.tbl.children('tbody').each($inv.bdysort);
            rif.tbl.trigger('fds.inv');  /* trigger calculations */

            /* Seed the authoritative server session (ADR 0006). Amounts join the recipient
               fields in the 'new' block; the reference invoice data goes into 'rem'. From here
               the backend owns the open-amount computation and validation; inline edits and the
               item-row dialog post single deltas (see $inv.rd). */
            let nw = rif.tbl.data('new');
            nw.amount = rem.amount; nw.amount_payed = rem.amount_payed;
            $inv.rd.seed({
                rem: { invid: rem.invid, type: rem.type, invoiceid: rem.invoiceid, invoicedate: rem.invoicedate },
                new: nw
            });
        }, complete: () => {
            //o.c.trigger('modal_close');
        }
    });
};
$inv.rprev = () => {
    /* Preview + finalise now run through the backend-authoritative session ($inv.rd):
       the PDF renders straight from the server cache (no rem/prep DB write), and confirm
       flushes (rem/dsave) then finalises + emails (rem/conf). */
    $inv.rd.preview();
};
$inv.sis = (id) => {
    if (confirm($ict.sisc)) {
        $ocms.postXT({
            url: $ocms.url('inv/sis'), data: { id: id || '' }, success: (response) => { }
        });
    }
};
$inv.srs = (id) => {
    if (confirm($ict.srsc)) {
        $ocms.postXT({
            url: $ocms.url('rem/srs'), data: { id: id || '' }, success: (response) => { }
        });
    }
};

$inv.mfrrel = (id) => {
    $('#contentframe').ldng();
    $ocms.postXT({
        url: $ocms.url('inv/mfrrel'), data: { id: id || '' }, success: (response) => { $inv.rerenderinv(); }, complete: () => {
            $('#contentframe').ldng(0);
        }
    });
};

/* ── User-defined set structure dialog (ADR 0016) ────────────────────────────
   Lets the user define which line belongs to which set (and how deep) instead of relying only
   on the implicit "everything after a Set header until the next Set" derivation that
   fds__prepInvoice delivers as the initial structure. The dialog is a pure view of the
   authoritative server state (state.req[].itm — the co shape with SetItmId + lvl): every action
   posts ONE delta (set.assign / set.level / set.create) via $inv.d.sync, the server rewrites the
   cached block (parent links, depth-first order, levels) and the normal draftReady/dstate
   refresh re-renders both the editor rows and this dialog (applyState -> $inv.sets.render).
   The browser never restructures anything itself (ADR 0006/0008). */
$inv.sets = {
    o: null,        /* open dialog handle ($ocms.dlg result) or null */
    c: null,        /* dialog content container */
    drag: null,     /* { id, bid } of the row currently being dragged */
    /* Reorder = set.move (▲▼ or drag before/after a row), membership = set.assign (drag into a set /
       root zone), depth = set.level (◀▶). Folding is purely a view state kept in $inv.sets.collapsed. */
    isOpen: () => !!$inv.sets.o,
    open: function () {
        let tbl = $inv.d.tbl();
        if (tbl.length < 1 || $inv.sets.isOpen()) { return; }
        if ($inv.d.token() === '' && !tbl.data('dstate')) { return; }   /* no draft session (e.g. reminder editor) — nothing to structure */
        let c = $$.dc('setstruct');
        $inv.sets.c = c;
        $inv.sets.o = $ocms.dlg(c, {
            title: $ict.setst, size: [-1, 960], exclusive: false,
            close: () => { $inv.sets.o = null; $inv.sets.c = null; $inv.sets.drag = null; }
        });
        let state = tbl.data('dstate');
        if (state) { $inv.sets.render(state); } else { $inv.d.refresh(); }
    },
    /* plain-text title of a co line (co.t is HTML for text lines / titles) */
    title: (co) => {
        let t = $$.d().html(co.t || '').text().replace(/\s+/g, ' ').trim();
        return t !== '' ? t : ($ict.setsNoTitle || '');
    },
    typLbl: (co) => {
        let k = (co.typ || '').toString().toLowerCase();
        return ($ict.settyp || {})[k] || co.typ || '';
    },
    isSet: (co) => (co.typ || '').toString().toLowerCase() === 'set',
    /* Normalised parent id of a line, mirroring InvoiceSetStructure.ParentOf: SetItmId when it
       names ANOTHER set line of the same block; '' for top level / self-reference / unknown. */
    parentOf: (co, byId) => {
        let p = (co.SetItmId == null ? '' : co.SetItmId).toString(), id = (co.id || '').toString();
        if (p === '' || p === id) { return ''; }
        let t = byId[p];
        return (t && $inv.sets.isSet(t)) ? p : '';
    },
    isDescendant: (candidateId, ancestorId, byId) => {
        let seen = {}, cur = byId[candidateId];
        while (cur) {
            let p = $inv.sets.parentOf(cur, byId);
            if (p === '' || seen[p]) { return false; }
            if (p === ancestorId) { return true; }
            seen[p] = true; cur = byId[p];
        }
        return false;
    },
    /* Whether a line may be dropped onto the given target set (same block, not itself, no cycle). */
    canDrop: (drag, targetId, bid, byId) =>
        !!drag && drag.bid === bid && drag.id !== targetId && !$inv.sets.isDescendant(targetId, drag.id, byId),
    sync: (delta) => {
        if ($inv.sets.c) { $inv.sets.c.aC('busy'); }
        return $inv.d.sync(delta);
    },
    render: function (state) {
        let c = $inv.sets.c; if (!c) { return; }
        let bdy = c.closest('.modal-body'), scroll = bdy.length ? bdy.scrollTop() : 0;
        c.empty().rC('busy');
        $$.dc('shint', c).text($ict.setsHint || '');
        (state.req || []).forEach((b) => {
            if (!b) { return; }
            let bid = (b.Id || '').toString(); if (bid === '') { return; }
            let itms = (b.itm || []).filter((co) => co && (co.id || '') !== ''), byId = {};
            itms.forEach((co) => { byId[(co.id || '').toString()] = co; });
            let blk = $$.dc('sblock', c).data({ bid: bid });
            $inv.sets.rootZone($$.dc('sbhd', blk).append($$.sc('nme', b.text || b.nme || bid)), bid, byId);
            let ts = $$.tblset({ class: 'stbl' }, blk);
            let thr = $$.tr(ts.hd);
            ($ict.setsHR || []).forEach((h) => $$.th(thr, h));
            itms.forEach((co) => $inv.sets.row(ts.bdy, co, bid, itms, byId));
            $inv.sets.rootZone($$.dc('sroot', blk).text($ict.setsRoot || ''), bid, byId);
            $inv.sets.createBar(blk, bid, itms, byId);
        });
        if (bdy.length) { bdy.scrollTop(scroll); }
    },
    /* Ancestor-collapsed test: a row is hidden while any set above it is folded. */
    collapsed: {},   /* set id -> true (survives re-renders; default: everything expanded) */
    hiddenByCollapse: function (co, byId) {
        let seen = {}, cur = co;
        while (cur) {
            let p = $inv.sets.parentOf(cur, byId);
            if (p === '' || seen[p]) { return false; }
            if ($inv.sets.collapsed[p]) { return true; }
            seen[p] = true; cur = byId[p];
        }
        return false;
    },
    /* Drop zone of a pointer position within a row: top edge = before, bottom edge = after,
       middle = into (sets only; for other rows the middle counts as "after"). */
    zone: function (ev, tr, isSet) {
        let oe = ev.originalEvent || ev, r = tr[0].getBoundingClientRect(), y = (oe.clientY || 0) - r.top, h = r.height || 1;
        if (y < h * 0.3) { return 'before'; }
        if (y > h * 0.7 || !isSet) { return 'after'; }
        return 'into';
    },
    clearDrop: () => { $('.setstruct .dropok, .setstruct .dropbefore, .setstruct .dropafter').rC('dropok dropbefore dropafter'); },
    /* One line of the structure table: drag handle, fold toggle, pos, type, qty, indented title,
       order buttons (▲▼ among siblings) and level buttons (◀▶). */
    row: function (tbody, co, bid, itms, byId) {
        let id = (co.id || '').toString(), lvl = parseInt(co.lvl || 0, 10) || 0, isSet = $inv.sets.isSet(co);
        let parent = $inv.sets.parentOf(co, byId), folded = isSet && !!$inv.sets.collapsed[id];
        let tr = $$.tr(tbody, { draggable: 'true' }).aC('srow lvl' + lvl).tC('isset', isSet).tC('folded', folded).data({ id: id, bid: bid });
        if ($inv.sets.hiddenByCollapse(co, byId)) { tr.aC('hid'); }
        $$.tdc('grip', tr).append(gi('move')).attr('title', $rct.mR);
        $$.tdc('pos', tr).text(co.p != null ? co.p : '');
        let typ = $$.tdc('typ', tr);
        if (isSet) {   /* fold toggle sits in the type column, in front of "Set" */
            typ.append($$.sc('fold').attr('title', folded ? $ict.setsExpand : $ict.setsCollapse).append(gi(folded ? 'triangle-right' : 'triangle-bottom')).click((ev) => {
                ev.stopPropagation();
                if (folded) { delete $inv.sets.collapsed[id]; } else { $inv.sets.collapsed[id] = true; }
                let state = $inv.d.tbl().data('dstate'); if (state) { $inv.sets.render(state); }
            }));
        }
        typ.append($$.s($inv.sets.typLbl(co)));
        $$.tdc('qty', tr).text(co.q || '');
        let ttl = $$.tdc('ttl', tr).append($$.sc('ind').css('width', (lvl * 1.4).toString() + 'rem')).append($$.s($inv.sets.title(co)));
        if (isSet) {
            let n = itms.filter((x) => $inv.sets.parentOf(x, byId) === id).length;
            ttl.append($$.sc('cnt', ' (' + n + ')'));
        }
        /* siblings (same parent, current order) drive the ▲▼ buttons; a preceding sibling set drives ▶ */
        let sibs = itms.filter((x) => $inv.sets.parentOf(x, byId) === parent), si = sibs.findIndex((x) => (x.id || '').toString() === id);
        let hasSibSet = sibs.slice(0, si).some((x) => $inv.sets.isSet(x));
        let act = $$.tdc('act', tr);
        let btn = (cls, glyph, title, enabled, delta) => $$.dc('ibtn ' + cls, act, { title: title }).append(gi(glyph)).tC('disabled', !enabled)
            .click(() => { if (enabled) { $inv.sets.sync(delta); } });
        btn('up', 'arrow-up', $ict.setsUp, si > 0, { Target: 'set.move', Ref: id, Value: -1 });
        btn('down', 'arrow-down', $ict.setsDown, si >= 0 && si < sibs.length - 1, { Target: 'set.move', Ref: id, Value: 1 });
        btn('out', 'chevron-left', $ict.setsOut, lvl > 0, { Target: 'set.level', Ref: id, Value: -1 });
        btn('in', 'chevron-right', $ict.setsIn, hasSibSet, { Target: 'set.level', Ref: id, Value: 1 });

        tr.on('dragstart', (ev) => {
            $inv.sets.drag = { id: id, bid: bid };
            tr.aC('dragging');
            try { ev.originalEvent.dataTransfer.setData('text/plain', id); ev.originalEvent.dataTransfer.effectAllowed = 'move'; } catch (e) { /* ignore */ }
        }).on('dragend', () => { tr.rC('dragging'); $inv.sets.drag = null; $inv.sets.clearDrop(); });
        /* Every row is a target: before / after (reorder, become the anchor's sibling — works on a
           folded set too, its subtree travels along) and, for sets, into (become its last member). */
        let ok = () => $inv.sets.canDrop($inv.sets.drag, id, bid, byId);
        tr.on('dragover', (ev) => {
            if (!ok()) { return; }
            ev.preventDefault();
            let z = $inv.sets.zone(ev, tr, isSet);
            tr.rC('dropok dropbefore dropafter').aC(z === 'into' ? 'dropok' : (z === 'before' ? 'dropbefore' : 'dropafter'));
        }).on('dragleave', () => { tr.rC('dropok dropbefore dropafter'); }).on('drop', (ev) => {
            ev.preventDefault(); $inv.sets.clearDrop();
            let d = $inv.sets.drag; $inv.sets.drag = null;
            if (!$inv.sets.canDrop(d, id, bid, byId)) { return; }
            let z = $inv.sets.zone(ev, tr, isSet);
            if (z === 'into') { $inv.sets.sync({ Target: 'set.assign', Ref: d.id, Value: { parent: id } }); }
            else { $inv.sets.sync({ Target: 'set.move', Ref: d.id, Value: { anchor: id, where: z } }); }
        });
        return tr;
    },
    /* Drop target for "pull out of its set" (top level of the block). */
    rootZone: function (el, bid, byId) {
        let ok = () => { let d = $inv.sets.drag; return !!d && d.bid === bid && !!byId[d.id] && $inv.sets.parentOf(byId[d.id], byId) !== ''; };
        el.on('dragover', (ev) => { if (ok()) { ev.preventDefault(); el.aC('dropok'); } })
          .on('dragleave', () => { el.rC('dropok'); })
          .on('drop', (ev) => {
              ev.preventDefault(); el.rC('dropok');
              let d = $inv.sets.drag; $inv.sets.drag = null;
              if (d && d.bid === bid && byId[d.id] && $inv.sets.parentOf(byId[d.id], byId) !== '') {
                  $inv.sets.sync({ Target: 'set.assign', Ref: d.id, Value: { parent: '' } });
              }
          });
        return el;
    },
    /* "New line" bar per block: type (Set/Text), target set (top level or any set), title. */
    createBar: function (blk, bid, itms, byId) {
        let bar = $$.dc('screate', blk);
        let typ = $('<select></select>').attr({ name: 'typ' }).append([$$.opt('set', $ict.settyp.set), $$.opt('text', $ict.settyp.text)]);
        let par = $('<select></select>').attr({ name: 'parent' }).append($$.opt('', $ict.setsTop));
        itms.forEach((co) => {
            if (!$inv.sets.isSet(co)) { return; }
            let lvl = parseInt(co.lvl || 0, 10) || 0;
            par.append($$.opt((co.id || '').toString(), ' '.repeat(lvl * 3) + $inv.sets.title(co)));
        });
        let ttl = $('<input type="text" />').attr({ name: 'title', placeholder: $ict.setsTitle, maxlength: 250 });
        let add = () => {
            let t = (ttl.val() || '').toString().trim();
            if (t === '') { ttl.focus(); return; }
            $inv.sets.sync({ Target: 'set.create', Ref: bid, Value: { typ: typ.val(), title: t, parent: par.val() || '' } });
            ttl.val('');
        };
        ttl.on('keydown', (ev) => { if (ev.key === 'Enter') { ev.preventDefault(); add(); } });
        bar.append([$$.sc('lbl', $ict.setsNew), typ, $$.sc('lbl', $ict.setsInto), par, ttl, $$.bbtn($ict.setsAdd, 'sadd').click(add)]);
        return bar;
    }
};