Auto-install Lua, smooth all panels, airspace overlay + launcher region picker

FlyWithLua auto-install: bridge drops fms-sync/ui-sync/terrain-probe into
X-Plane's FlyWithLua Scripts dir on startup and self-updates (content-compare).
Graceful when no X-Plane / no FlyWithLua. /api/lua/install + status in health.
Desktop app bundles the scripts and passes LUA_SRC_DIR to the sidecar.

Smoothing: shared useEased/useEasedAngle hook (api/ease.js) with render-bail on
settle. VFR steam gauges now interpolate to 60fps instead of stepping at the
~10Hz value stream. MFD ownship no longer vibrates — position/heading eased in a
single rAF loop, follow-pan without animated-panTo pile-up (pauses on range zoom).

Airspace overlay: server/airspace.js loads per-region GeoJSON, classifies
(B/C/D/TMA/CTR/MOA/Restricted/Prohibited/Danger), bbox query, and downloads
regions on demand — FAA (US, key-free) and OpenAIP (Europe, user key). New
AIRSPACE softkey draws chart-coloured boundaries (B blue, C magenta, D dashed),
non-interactive so map-clicks still drop waypoints. Launcher gains a "Lufträume"
section to pick/download regions via the running bridge.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

desktop/ui/index.html

@@ -65,6 +65,16 @@
           <div class="diag-row"><span>Navdata</span><b id="dNav">—</b></div>
           <div class="diag-row"><span>Datarefs</span><b id="dRefs">—</b></div>
         </div>
+
+        <details class="asp-wrap">
+          <summary>Lufträume auf der Karte</summary>
+          <div class="asp-body">
+            <p class="asp-note">Wähle Regionen für die Luftraum-Anzeige (Class B/C/D, Restricted, MOA …). USA ist frei; Europa braucht einen kostenlosen <a href="#" id="aspKeyLink">OpenAIP-API-Key</a>.</p>
+            <input id="aspKey" type="password" placeholder="OpenAIP API-Key (für Europa)" spellcheck="false" />
+            <div id="aspRegions" class="asp-list"></div>
+            <div id="aspHint" class="hint"></div>
+          </div>
+        </details>
       </section>
 
       <details class="log-wrap">