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.go

@@ -38,6 +38,7 @@ import (
 	"hamlog/internal/cwdecode"
 	"hamlog/internal/db"
 	"hamlog/internal/dxcc"
+	"hamlog/internal/dxped"
 	"hamlog/internal/email"
 	"hamlog/internal/extsvc"
 	"hamlog/internal/geo"
@@ -805,6 +806,9 @@ type App struct {
 	solar        *solar.Manager     // live space-weather (SFI/SSN/A/K) for the header + QSO stamping
 	lotwUsers    *lotwusers.Manager // LoTW user-activity list (badge next to the callsign)
 	scp          *scp.Manager       // Super Check Partial / N+1 callsign master list
+	// dxped reads the ADXO announcements and the DX-World feed for the
+	// DXpeditions tab. Built lazily: nothing fetches until the tab is opened.
+	dxped *dxped.Manager
 
 	// NET Control: persistent net definitions/rosters (global JSON) + the live
 	// session (in-memory only — active stations currently in QSO).