feat: Ultrabeam over USB, Paper QSL from the awards grid, per-role schemas

Ultrabeam on a serial port never worked, and three faults were stacked so
each hid the next:

  - Stop() did not wait for the poll loop, so a stopped client kept the COM
    port. Every later client then failed with "Serial port busy" — the
    program holding it being OpsLog itself.
  - startUltrabeam tore the old client down CONCURRENTLY with starting the
    new one, and "Test connection" built a second client on a port already
    ours. Harmless over TCP, fatal on a port with one owner.
  - A silent serial port returns (0, nil) and bufio retries that a hundred
    times: a 4 s timeout became ~7 minutes of a frozen poll loop logging
    nothing.

The controller then answered at once. Confirmed on hardware: the USB cable
presents TWO COM ports, only the second reaches the controller, and only at
19200 baud — so the speed is pinned in code (an FTDI cable opens at any
speed, and a wrong one is indistinguishable from a dead controller) and the
port field says which one to pick. The first exchange after each connect is
hex-dumped, which separates silence from a wrong baud from a misread frame.

Databases now carry only the tables their role needs. Every target used to
get the whole migration set, so a shared MySQL logbook grew settings and
station_profiles tables nothing ever wrote to — an operator inspecting the
server could not tell which copy was authoritative. Statements are filtered
by role, unknown tables are kept in both (fail-safe), and existing databases
are cleaned once, dropping only EMPTY tables. Settings → Database gains a
Compact button, since SQLite frees pages inside the file and never shrinks it.

Also:
  - Awards: the callsigns behind a cell open the QSL Manager on Paper QSL,
    searched, ready for the card dates.
  - The record button no longer goes missing after an update: whether manual
    recording is possible is a per-profile question that was asked once, at
    startup, before the profile was known.
  - Alert rules and filter presets confirm that they were saved.
  - Spot clicks on the radio panadapter carry the POTA park into F3.
  - The build gate is re-checked wherever the active callsign can change; it
    ran at startup alone, and a fresh install has no callsign then.

frontend/src/App.tsx

@@ -891,6 +891,13 @@ export default function App() {
     QSOAudioPlayOnAir().catch((e: any) => setError(String(e?.message ?? e)));
   };
   const refreshManualRecReady = () => { QSOAudioManualReady().then(setManualRecReady).catch(() => {}); };
+  // Asked at mount, and asked AGAIN once the backend is really up (see the
+  // initial grid load) and on every profile change. The audio devices are a
+  // per-profile setting, so this question cannot be answered before the active
+  // profile is known — and a "no" then was final, which is why the record button
+  // went missing for a whole session after an update, when startup does more
+  // work and the first ask loses the race. Opening and closing the audio panel
+  // was the only way back.
   useEffect(() => { refreshManualRecReady(); }, []);
   const startManualRecording = () => {
     QSOAudioManualStart().then((active) => {
@@ -1104,6 +1111,17 @@ export default function App() {
   };
   // QSL Manager is a closable tab opened on demand from Tools → QSL Manager.
   const [qslTabOpen, setQslTabOpen] = useState(false);
+  // A callsign sent to the QSL Manager's Paper QSL view from elsewhere (the
+  // awards grid). The counter makes two clicks on the same callsign two
+  // requests — the panel is force-mounted and would otherwise see no change.
+  const [qslPaperReq, setQslPaperReq] = useState<{ call: string; n: number } | undefined>(undefined);
+  function openPaperQSLFor(call: string) {
+    const c = call.trim().toUpperCase();
+    if (!c) return;
+    setQslTabOpen(true);
+    setActiveTab('qsl');
+    setQslPaperReq((r) => ({ call: c, n: (r?.n ?? 0) + 1 }));
+  }
   const [qslDesignerOpen, setQslDesignerOpen] = useState(false);
   const [eqslQsoId, setEqslQsoId] = useState<number | null>(null); // QSO being sent as eQSL
   function closeQslTab() {
@@ -3087,6 +3105,7 @@ export default function App() {
         // Same race, same fix: the toolbar options were read once at mount,
         // possibly before the profile was active, and a "no" then was final.
         refreshChaseNew();
+        refreshManualRecReady();
       } else if (!ok && alive && tries++ < 360) {
         // Quick retries at first (normal startup connects in ~2 s); then keep
         // trying for several minutes, because the very first migration against a
@@ -3641,6 +3660,8 @@ export default function App() {
       setGridPrefsProfile(id ?? null);
       setActiveProfileId(typeof id === 'number' ? id : null);
       loadStation(); loadLists(); loadCATCfg(); reloadWk(); loadMainPanes(); loadProfileList();
+      // The sound devices are per profile: one may record and the next not.
+      refreshManualRecReady();
       // The chat is per shared logbook — clear the previous profile's messages
       // and reload for the new logbook (or hide if it isn't a MySQL log).
       setChatMsgs([]); chatSeen.current.clear(); setChatOnline([]); setChatUnread(0);
@@ -7688,6 +7709,7 @@ export default function App() {
               <TabsContent value="qsl" forceMount className="mt-0 flex flex-col min-h-0 flex-1 data-[state=inactive]:hidden">
                 <QSLManagerPanel
                   onEditQSO={openEdit}
+                  paperRequest={qslPaperReq}
                   // The same row actions the Recent QSOs grid offers. Only the
                   // selection-based exports: exporting "the filter" would mean
                   // the Recent-QSOs filter, not the rows shown here.
@@ -7793,7 +7815,8 @@ export default function App() {
             </TabsContent>
 
             <TabsContent value="awards" className="flex-1 min-h-0 p-0">
-              <AwardsPanel onEditQSO={openEdit} onAwardsChanged={() => setAwardsVersion((v) => v + 1)} />
+              <AwardsPanel onEditQSO={openEdit} onAwardsChanged={() => setAwardsVersion((v) => v + 1)}
+                onPaperQSL={openPaperQSLFor} />
             </TabsContent>
 
             {statsTabOpen && (