G1000: deepen VNAV/PFD — V-DEV & VS-TGT chevrons, GPS phase, designated toggle

- PFD VNAV: magenta flight-plan target altitude on the alt scale (S.110), V DEV
  deviation scale + chevron (left, shown in VNAV when not on an ILS), VS TGT
  chevron on the VSI (S.113)
- GPS phase annunciation is now dynamic: APR (approach leg) / TERM (<30 nm to
  destination) / ENR, instead of a fixed label
- flight-plan ALT can be toggled designated(blue) <-> reference(white) by clicking
  the cell (S.106); only designated altitudes drive the VNAV profile
- setPlan now preserves the dsgn/appr waypoint flags across the shared plan
- AFCS vertical mode labelled VPTH (manual) instead of VNV

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

server/bridge.js

@@ -279,7 +279,7 @@ function startDemo() {
     apMode: 2, hdgStatus: 2, gpssStatus: 1, altStatus: 2,
     lat: 47.45, lon: -122.31, track: 90, groundspeed: 64, gpsDistNm: 18.4, gpsBearing: 92,
     // radios (XP freq units: nav/com in 10 kHz, e.g. 11030 = 110.30)
-    nav1: 11030, nav1Sb: 11150, nav2: 11380, nav2Sb: 10890,
+    nav1: 11380, nav1Sb: 11150, nav2: 11030, nav2Sb: 10890,
     com1: 12190, com1Sb: 13000, com2: 12475, com2Sb: 12180,
     // HSI / data fields
     obsCrs: 175, hsiDef: -0.6, hsiToFrom: 1, navBearing: 168, gsDef: 0.7,