fix(qsl): separate the QSL manager from the routing method (#16)

QSL_VIA is the manager. QSL_SENT_VIA and QSL_RCVD_VIA are the ADIF "QSL Via"
enumeration — B bureau, D direct, E electronic, M manager (import-only) —
and say how a card travelled. OpsLog had one column for all three:

  - the import folded QSL_SENT_VIA into QSL_VIA whenever QSL_VIA was empty,
    which is exactly a Log4OM export (it defaults QSL_SENT_VIA to E), so
    OE6CLD saw "E" everywhere OpsLog shows the manager;
  - QSL_RCVD_VIA was listed in adifPromoted with no column behind it, so it
    was not stored, not kept among the extras, and not exported — dropped
    outright on import;
  - neither was ever written on export, so an import followed by an export
    destroyed both;
  - and OpsLog polluted the field itself: the QSL Manager panel wrote
    "Bureau" / "Direct" / "Electronic", in full words, into QSL_VIA.

Two columns added (migration 0027), carried through the five places a
promoted ADIF field has to touch, with round-trip tests pinning the reported
case. The QSL panel now offers Bureau / Direct / Electronic for each
direction and stores the enumeration; the manager field is labelled as the
manager and holds only that. M is kept when a file gives it and never
written back out.

Existing logs hold a mixture of the two in one column. The repair is offered,
not performed: the count is shown once per log with a plain question, and a
"no" is remembered. It moves only where QSL_SENT_VIA is still empty, and only
values that normalise to the enumeration — a manager is a callsign and can
never be one of those six words, which a test pins against real manager calls.

frontend/wailsjs/go/models.ts

@@ -2859,6 +2859,32 @@ export namespace main {
 	        this.updated_at = source["updated_at"];
 	    }
 	}
+	export class QSLViaRepairResult {
+	    moved: number;
+	
+	    static createFrom(source: any = {}) {
+	        return new QSLViaRepairResult(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.moved = source["moved"];
+	    }
+	}
+	export class QSLViaRepairStatus {
+	    affected: number;
+	    asked: boolean;
+	
+	    static createFrom(source: any = {}) {
+	        return new QSLViaRepairStatus(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.affected = source["affected"];
+	        this.asked = source["asked"];
+	    }
+	}
 	export class QSOAwardRef {
 	    code: string;
 	    ref: string;
@@ -4330,6 +4356,8 @@ export namespace qso {
 	    qsl_sent_date?: string;
 	    qsl_rcvd_date?: string;
 	    qsl_via?: string;
+	    qsl_sent_via?: string;
+	    qsl_rcvd_via?: string;
 	    qsl_msg?: string;
 	    qslmsg_rcvd?: string;
 	    lotw_sent?: string;
@@ -4469,6 +4497,8 @@ export namespace qso {
 	        this.qsl_sent_date = source["qsl_sent_date"];
 	        this.qsl_rcvd_date = source["qsl_rcvd_date"];
 	        this.qsl_via = source["qsl_via"];
+	        this.qsl_sent_via = source["qsl_sent_via"];
+	        this.qsl_rcvd_via = source["qsl_rcvd_via"];
 	        this.qsl_msg = source["qsl_msg"];
 	        this.qslmsg_rcvd = source["qslmsg_rcvd"];
 	        this.lotw_sent = source["lotw_sent"];