feat(dxped): the announced DX, judged against your own log

A DXpeditions tab holding the two feeds the DX world announces itself
on: NG3K's ADXO (structured — dates, entity, calls, bands, modes, QSL
route) and DX-World's headlines. What a logger can say that a news
reader cannot is whether the operation is worth chasing, so every
announcement is put through the SAME verdict the cluster paints on a
spot — one badge, strongest wins, dimmed when the need is only a missing
QSL — with an 'only what I need' filter. One click watches every
callsign of an operation; the news headlines are mined for callsigns so
they can be watched the same way.

Parsers ported from DXHunter's and pinned with table tests against real
feed text: the 'as PJ2/W2APF' mining, the DXCC-prefix-first
normalisation without which no spot ever matches, both ADXO date forms,
and the '160-6m' span whose unit is written once (DXHunter read that as
6m alone and lost the low end).

Watchlist membership now announces itself app-wide, on the same card as
a new version: the bindings emit watchlist:changed, so a call added from
the cluster or this tab is confirmed where the operator is actually
looking — the panel's own inline message never was.

app_dxped.go

@@ -0,0 +1,146 @@
+package main
+
+import (
+	"strings"
+
+	"hamlog/internal/applog"
+	"hamlog/internal/dxped"
+)
+
+// ── DXpeditions (ADXO announcements + DX-World news) ────────────────────
+//
+// What a logger can say that a news reader cannot: whether the announced
+// operation is worth chasing. Every activation is judged against THIS log —
+// the same verdict the cluster paints on a spot — so the list reads as "what I
+// still need", not "what is on the air".
+
+// DXpedition is one announced operation plus what it is worth here.
+type DXpedition struct {
+	dxped.Activation
+	// Status is the strongest verdict across the announced callsigns, bands and
+	// modes: "new" (entity never worked) beats "new-band-mode", which beats
+	// "new-band", "new-mode", "new-slot", and finally "worked". Empty when the
+	// callsign resolves to no entity — a prefix ADXO knows and cty.dat does not.
+	Status string `json:"status_chase"`
+	// Unconfirmed marks a need that is only a missing QSL, so the badge can be
+	// drawn dimmed exactly as it is in the cluster and the decode list.
+	Unconfirmed bool `json:"unconfirmed"`
+}
+
+// chaseRank orders the verdicts from "most worth chasing" down. The DXpedition
+// list shows ONE badge, so the ranking is the whole decision.
+var chaseRank = map[string]int{
+	"new":           6,
+	"new-band-mode": 5,
+	"new-band":      4,
+	"new-mode":      3,
+	"new-slot":      2,
+	"worked":        1,
+}
+
+// GetDXpeditions returns the announced operations, freshest feed permitting,
+// each carrying its chase verdict.
+func (a *App) GetDXpeditions() ([]DXpedition, error) {
+	if a.dxped == nil {
+		a.dxped = dxped.New()
+	}
+	acts, err := a.dxped.Activations(a.ctx)
+	if err != nil {
+		applog.Printf("dxped: adxo fetch: %v", err)
+		if len(acts) == 0 {
+			return nil, err
+		}
+		// Stale data with a logged error beats an empty tab.
+	}
+	out := make([]DXpedition, 0, len(acts))
+	for _, act := range acts {
+		out = append(out, DXpedition{Activation: act, Status: "", Unconfirmed: false})
+	}
+	a.judgeDXpeditions(out)
+	return out, nil
+}
+
+// judgeDXpeditions fills in the chase verdict, in place.
+//
+// One ClusterSpotStatuses call for the whole list rather than one per row: the
+// worked-index it builds is the expensive part (a full pass over the log), and
+// asking it forty times to answer forty rows was the difference between a tab
+// that opens and a tab that stalls a remote MySQL for a second.
+func (a *App) judgeDXpeditions(list []DXpedition) {
+	if a.qso == nil || len(list) == 0 {
+		return
+	}
+	type slot struct{ row int }
+	var queries []SpotQuery
+	var owners []slot
+	for i, d := range list {
+		calls := d.Calls
+		if len(calls) == 0 {
+			if c := strings.ToUpper(strings.TrimSpace(d.Callsign)); c != "" {
+				calls = []string{c}
+			}
+		}
+		for _, call := range calls {
+			// No announced band/mode: ask the entity-level question alone.
+			if len(d.Bands) == 0 && len(d.Modes) == 0 {
+				queries = append(queries, SpotQuery{Call: call})
+				owners = append(owners, slot{i})
+				continue
+			}
+			bands := d.Bands
+			if len(bands) == 0 {
+				bands = []string{""}
+			}
+			modes := d.Modes
+			if len(modes) == 0 {
+				modes = []string{""}
+			}
+			for _, b := range bands {
+				for _, m := range modes {
+					queries = append(queries, SpotQuery{Call: call, Band: b, Mode: m})
+					owners = append(owners, slot{i})
+				}
+			}
+		}
+	}
+	if len(queries) == 0 {
+		return
+	}
+	res := a.ClusterSpotStatuses(queries)
+	for i, r := range res {
+		if i >= len(owners) {
+			break
+		}
+		row := owners[i].row
+		if chaseRank[r.Status] > chaseRank[list[row].Status] {
+			list[row].Status = r.Status
+			list[row].Unconfirmed = r.UnconfStatus
+		}
+	}
+}
+
+// GetDXWorldNews returns the DX-World headlines, with the callsigns mined out
+// of each one so the reader can act on them.
+func (a *App) GetDXWorldNews() ([]dxped.News, error) {
+	if a.dxped == nil {
+		a.dxped = dxped.New()
+	}
+	news, err := a.dxped.News(a.ctx)
+	if err != nil {
+		applog.Printf("dxped: dx-world fetch: %v", err)
+		if len(news) == 0 {
+			return nil, err
+		}
+	}
+	return news, nil
+}
+
+// RefreshDXpeditions drops both caches so the next read goes to the network.
+// Wired to the tab's refresh button: an operator who has just read of a landing
+// on a cluster should not wait out the cache to see it here.
+func (a *App) RefreshDXpeditions() {
+	if a.dxped == nil {
+		a.dxped = dxped.New()
+	}
+	a.dxped.Invalidate()
+}