renderer: restore the \u escapes in the display-status strings

The previous commit wrote these seven lines with literal em-dashes, ellipses
and curly apostrophes where the app's source has — / … / ’
escapes. JavaScript reads both identically, so nothing behaved differently —
but a reference fork that differs from its upstream by thirty bytes reports
phantom drift every time the two are compared, which is the one job this
snapshot has.

band-lineup-display/renderer.js

@@ -1571,11 +1571,11 @@ function renderDisplay() {
   }
 
   if (!state?.enabled) {
-    setDisplayStatus('Off — screens around the building can’t see this yet.');
+    setDisplayStatus('Off \\u2014 screens around the building can\\u2019t see this yet.');
   } else if (state.lastError) {
     setDisplayStatus(state.lastError, true);
   } else if (!state.listening) {
-    setDisplayStatus('Starting…');
+    setDisplayStatus('Starting\\u2026');
   } else if (state.mdnsConflict) {
     setDisplayStatus(
       `Another computer is already publishing that name (${state.mdnsConflict}). Use one of the numeric addresses below.`,
@@ -1587,19 +1587,19 @@ function renderDisplay() {
     // when two machines are open is just wrong.
     const screens = state.devices || state.viewers;
     const extra = state.viewers > screens ? ` (${state.viewers} connections)` : '';
-    setDisplayStatus(`On — ${screens} screen${screens === 1 ? '' : 's'} watching${extra}.`);
+    setDisplayStatus(`On \\u2014 ${screens} screen${screens === 1 ? '' : 's'} watching${extra}.`);
   } else if (state.everHadViewer) {
-    setDisplayStatus('On — no screens open right now.');
+    setDisplayStatus('On \\u2014 no screens open right now.');
   } else if (displayOnSince && Date.now() - displayOnSince > DISPLAY_FIREWALL_GRACE_MS) {
     // On Windows the firewall prompt fires when the server starts listening, not when a
     // studio first connects — so localhost looks fine here while every other screen times
     // out. A viewer count stuck at zero is the only hint we get; say it plainly.
     setDisplayStatus(
-      `On, but no screen has connected yet. If a studio can’t load the page, Windows Firewall on this computer is probably blocking Band Lineup — it needs to allow TCP port ${state.port} for Private networks.`,
+      `On, but no screen has connected yet. If a studio can\\u2019t load the page, Windows Firewall on this computer is probably blocking Band Lineup \\u2014 it needs to allow TCP port ${state.port} for Private networks.`,
       true,
     );
   } else {
-    setDisplayStatus('On — open one of these on any screen in the building.');
+    setDisplayStatus('On \\u2014 open one of these on any screen in the building.');
   }
 
   renderDisplayUrls();
@@ -1626,7 +1626,7 @@ function scheduleDisplayRefresh() {
 async function toggleDisplayHosting() {
   const next = !displayState?.enabled;
   btnDisplayToggle.disabled = true;
-  setDisplayStatus(next ? 'Starting…' : 'Stopping…');
+  setDisplayStatus(next ? 'Starting\\u2026' : 'Stopping\\u2026');
   try {
     displayState = await window.lineup.display.setEnabled(next);
     displayOnSince = next ? Date.now() : 0;