Manual audit B/C/D: VNAV control, Direct-To descent, NRST actions

D — NRST page: each nearest entry can now load its tower/CTAF into COM1 standby
(→COM) or a VOR into NAV1 standby (→NAV), and fly Direct-To it (D→). Nearest now
takes xp; com/nav standby datarefs made writable.

C — Direct-To with VNAV descent: the DTO dialog's ALT (MSL/AGL) and OFFSET fields
are now editable; entering an altitude makes the target a designated VNAV fix
(alt+dsgn) and arms VNAV, so the descent profile + PFD chevrons compute.

B — VNAV control: shared vnav config (enabled/fpa/offsetNm) threaded to PFD +
FplPage. The CURRENT VNV PROFILE panel gains ENBL/CNCL VNV, FPA ±, along-track
ATK ± and VNV-D→ keys; the profile + PFD chevrons honour the chosen FPA/offset
and hide when cancelled.

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

web/src/components/MFD.jsx

@@ -38,7 +38,7 @@ const fmtEte = (s) => {
 // down the left as real bar gauges, and the moving map (X-Plane nav data) with
 // G1000 chrome (compass rose, range, NORTH UP, mode) filling the rest.
 const MFD_PAGES = [{ id: 'map', name: 'MAP' }, { id: 'fpl', name: 'FPL' }, { id: 'nrst', name: 'NRST' }];
-export default function MFD({ values: V, flightPlan, fp, mapMode, page = 'map', onCycle, xp }) {
+export default function MFD({ values: V, flightPlan, fp, mapMode, page = 'map', onCycle, xp, vnav, onVnav }) {
   const [rangeNm, setRangeNm] = useState(8);
   const idx = Math.max(0, MFD_PAGES.findIndex((p) => p.id === page));
   return (
@@ -54,8 +54,8 @@ export default function MFD({ values: V, flightPlan, fp, mapMode, page = 'map',
               terrain={xp?.terrain} rose onView={({ rangeNm }) => setRangeNm(rangeNm)} />
             <MapChrome V={V} rangeNm={rangeNm} />
           </div>
-          {page === 'nrst' && <Nearest values={V} full />}
-          {page === 'fpl' && xp && <FplPage xp={xp} full />}
+          {page === 'nrst' && <Nearest xp={xp} full />}
+          {page === 'fpl' && xp && <FplPage xp={xp} full vnav={vnav} onVnav={onVnav} />}
           {/* page-group indicator (bottom-right), like the real G1000 — selected
               by the FMS knob; tappable as a touch fallback. */}
           <button className="mfd-pageind" onClick={() => onCycle && onCycle(1)} title="Seite (FMS-Knopf)">