fix: offline operators removed from live_status + award-column visibility

Live status: when an operator goes offline (no QSO in the window) OpsLog now
DELETEs its live_status row instead of just flipping online=0, so a status page
that lists present/recent rows shows them as gone without having to read the
online column — the whole point of the feature. The row reappears on the next
QSO.

Recent QSOs columns: toggling an award column (e.g. DDFM) rebuilt columnDefs and
made AG Grid re-apply every colDef hide default, so hidden non-award columns
(QTH/Grid) came back and restoringRef stayed stuck true (saving off). The
restore-saved-state effect now also runs on awardShown changes, so the other
columns keep the user's visibility.

frontend/src/components/RecentQSOsGrid.tsx

@@ -377,11 +377,13 @@ export function RecentQSOsGrid({ rows, selectAllSignal, storageKey, onRowDoubleC
     if (state) saveState(colStateKey, stripAwardCols(state));
   }, []);
 
-  // The award columns load asynchronously; when they arrive (or change) the
+  // columnDefs is rebuilt whenever the award columns load OR the user toggles an
-  // columnDefs memo is rebuilt and AG Grid re-applies each colDef's `hide`
+  // award column (both change the memo → restoringRef flips true at line 316). Each
-  // default — wiping the user's saved visibility (award columns reappear,
+  // rebuild makes AG Grid re-apply every colDef's `hide` default, wiping the user's
-  // manually-shown ones like LoTW sent vanish). Re-apply the saved state after
+  // saved visibility of the NON-award columns (QTH/Grid reappear, a manually-shown
-  // every rebuild so the user's choices win. No-op before the grid is ready.
+  // LoTW-sent vanishes). Re-apply the saved (award-stripped) state after EVERY such
+  // rebuild — hence awardShown in the deps, not just awardCols; without it, toggling
+  // an award reset the other columns AND left restoringRef stuck true (saving off).
   useEffect(() => {
     const api = gridRef.current?.api;
     const local = loadLocal(colStateKey);
@@ -389,7 +391,7 @@ export function RecentQSOsGrid({ rows, selectAllSignal, storageKey, onRowDoubleC
     // Re-enable saving once AG Grid has settled the column events from the rebuild.
     const t = window.setTimeout(() => { restoringRef.current = false; }, 0);
     return () => window.clearTimeout(t);
-  }, [awardCols]);
+  }, [awardCols, awardShown]);
 
   function handleRowDoubleClicked(e: RowDoubleClickedEvent<QSOForm>) {
     if (e.data && onRowDoubleClicked) onRowDoubleClicked(e.data);

livestatus.go

@@ -202,33 +202,37 @@ func (a *App) publishLiveStatus() {
 	}
 	a.liveActMu.Unlock()
 	lastQSO := a.liveLastQSOTime() // authoritative (in-memory OR shared DB)
-	// Online = a new contact was logged within the window. An operator who leaves
+	// On air = a new contact was logged within the window. An operator who leaves
-	// the log open but stops working shows offline after `liveOnlineWindow`; the
+	// the log open but stops working goes offline after `liveOnlineWindow`; the next
-	// next QSO flips them back on. never-logged (zero time) → offline.
+	// QSO puts them back on. never-logged (zero time) → offline.
-	online := 0
+	online := !lastQSO.IsZero() && time.Since(lastQSO) < liveOnlineWindow
-	var lastQSOArg any
-	if !lastQSO.IsZero() {
-		lastQSOArg = lastQSO.UTC()
-		if time.Since(lastQSO) < liveOnlineWindow {
-			online = 1
-		}
-	}
 	if err := a.ensureLiveStatusTable(); err != nil {
 		applog.Printf("livestatus: CREATE TABLE failed: %v", err)
 		return
 	}
+	// Offline → REMOVE the row entirely, not just flip a flag: a status page that
+	// lists the present rows (the common case, keyed on updated_at) then shows the
+	// operator as gone without having to read the online column. The row reappears
+	// on the next QSO. This is the whole point — no one shows on air when they're not.
+	if !online {
+		if _, err := a.logDb.ExecContext(a.ctx, "DELETE FROM live_status WHERE operator=?", op); err != nil {
+			applog.Printf("livestatus: offline DELETE failed: %v", err)
+		}
+		return
+	}
+	lastQSOArg := lastQSO.UTC()
 	_, err := a.logDb.ExecContext(a.ctx,
 		"INSERT INTO live_status (operator, station, freq_hz, band, mode, online, version, last_qso_at, updated_at) "+
 			"VALUES (?, ?, ?, ?, ?, ?, ?, ?, UTC_TIMESTAMP()) "+
 			"ON DUPLICATE KEY UPDATE station=VALUES(station), freq_hz=VALUES(freq_hz), "+
 			"band=VALUES(band), mode=VALUES(mode), online=VALUES(online), version=VALUES(version), "+
 			"last_qso_at=VALUES(last_qso_at), updated_at=UTC_TIMESTAMP()",
-		op, station, freqHz, band, mode, online, appVersion, lastQSOArg)
+		op, station, freqHz, band, mode, 1, appVersion, lastQSOArg)
 	if err != nil {
 		applog.Printf("livestatus: INSERT failed: %v", err)
 		return
 	}
-	applog.Printf("livestatus: published op=%s station=%s %dHz %s %s online=%d", op, station, freqHz, band, mode, online)
+	applog.Printf("livestatus: published op=%s station=%s %dHz %s %s ON AIR", op, station, freqHz, band, mode)
 }
 
 // LiveStation is one operator's live status for the multi-op "who's on air" widget.