feat: Migrate networking to Ktor and enhance multiplatform support (#4890)

Signed-off-by: James Rich <2199651+jamesarich@users.noreply.github.com>

docs/roadmap.md

@@ -1,6 +1,6 @@
 # Roadmap
 
-> Last updated: 2026-03-17
+> Last updated: 2026-03-23
 
 Forward-looking priorities for the Meshtastic KMP multi-target effort. For current state, see [`kmp-status.md`](./kmp-status.md). For the full gap analysis, see [`decisions/architecture-review-2026-03.md`](./decisions/architecture-review-2026-03.md).
 
@@ -42,7 +42,7 @@ These items address structural gaps identified in the March 2026 architecture re
     -   Test navigation flows end-to-end
 2.  **Tier 2: Polish (High Priority)**
     -   Additional desktop-specific settings polish
-    -   ✅ **MenuBar integration** and Keyboard shortcuts
+    -   ✅ **Keyboard shortcuts** via `onPreviewKeyEvent` (MenuBar removed)
     -   Window management
     -   State persistence
 3.  **Tier 3: Advanced (Nice-to-have)**
@@ -74,7 +74,7 @@ These items address structural gaps identified in the March 2026 architecture re
 | Charts | ✅ Vico KMP charts wired in commonMain (Device, Environment, Signal, Power, Pax) |
 | Debug Panel | ✅ Real screen (mesh log viewer via shared `DebugViewModel`) |
 | Notifications | ✅ Desktop native notifications with system tray icon support |
-| MenuBar | ✅ Done — Native application menu bar with File/View menus |
+| MenuBar | ✅ Removed — replaced with `onPreviewKeyEvent` keyboard shortcuts (⌘Q, ⌘,, ⌘⇧T, ⌘1-4, ⌘/) |
 | About | ✅ Shared `commonMain` screen (AboutLibraries KMP `produceLibraries` + per-platform JSON) |
 | Packaging | ✅ Done — Native distribution pipeline in CI (DMG, MSI, DEB) |