PFD/cockpit polish + KAP140 autopilot + UI refinements

- PFD: full-screen 2D attitude, G1000 yellow+magenta chevron symbology, rAF
  60fps horizon smoothing, translucent tapes, slimmer softkey bar, header fixes
- Collapsible macOS-dark sidebar (Inter), VFR six-pack + engine cluster + tach
- KAP140 autopilot on the analog page; GMC-710 AFCS tab
- FMS rebuilt as an X-Plane-style CDU; PWA; settings panel (knob mode)

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

desktop/src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "X-Plane Cockpit",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "identifier": "ch.kgva.xplanecockpit",
   "build": {
     "frontendDist": "../ui"