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Refactor nav3 architecture and enhance adaptive layouts (#4944)

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Signed-off-by: James Rich <2199651+jamesarich@users.noreply.github.com>
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James Rich 2026-03-27 09:43:44 -05:00 • committed by GitHub
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AGENTS.md
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@ -42,7 +42,7 @@ Meshtastic-Android is a Kotlin Multiplatform (KMP) application for off-grid, dec
| `core:network` | KMP networking layer using Ktor, MQTT abstractions, and shared transport (`StreamFrameCodec`, `TcpTransport`, `SerialTransport`, `BleRadioInterface`). |
| `core:di` | Common DI qualifiers and dispatchers. |
| `core:navigation` | Shared navigation keys/routes for Navigation 3, `DeepLinkRouter` for typed backstack synthesis, and `MeshtasticNavSavedStateConfig` for backstack persistence. |
| `core:ui` | Shared Compose UI components (`MeshtasticAppShell`, `MeshtasticNavigationSuite`, `AlertHost`, `SharedDialogs`, `PlaceholderScreen`, `MainAppBar`, dialogs, preferences) and platform abstractions. |
| `core:ui` | Shared Compose UI components (`MeshtasticAppShell`, `MeshtasticNavDisplay`, `MeshtasticNavigationSuite`, `AlertHost`, `SharedDialogs`, `PlaceholderScreen`, `MainAppBar`, dialogs, preferences) and platform abstractions. |
| `core:service` | KMP service layer; Android bindings stay in `androidMain`. |
| `core:api` | Public AIDL/API integration module for external clients. |
| `core:prefs` | KMP preferences layer built on DataStore abstractions. |
@ -64,7 +64,7 @@ Meshtastic-Android is a Kotlin Multiplatform (KMP) application for off-grid, dec
- **Alerts:** Use `AlertHost(alertManager)` from `core:ui/commonMain` in each platform host shell (`Main.kt`, `DesktopMainScreen.kt`). For global responses like traceroute and firmware validation, use the specialized common handlers: `TracerouteAlertHandler(uiViewModel)` and `FirmwareVersionCheck(uiViewModel)`. Do NOT duplicate inline alert-rendering logic or trigger alerts directly during composition. For shared QR/contact dialogs, use the `SharedDialogs(uiViewModel)` composable.
- **Placeholders:** For desktop/JVM features not yet implemented, use `PlaceholderScreen(name)` from `core:ui/commonMain`. Do NOT define inline placeholder composables in feature modules.
- **Theme Picker:** Use `ThemePickerDialog` and `ThemeOption` from `feature:settings/commonMain`. Do NOT duplicate the theme dialog or enum in platform-specific source sets.
- **Adaptive Layouts:** Use `currentWindowAdaptiveInfo(supportLargeAndXLargeWidth = true)` to support the 2026 Desktop Experience breakpoints. Prioritize **higher information density** and mouse-precision interactions for Desktop and External Display (Android 16 QPR3) targets. **Investigate 3-pane "Power User" scenes** (e.g., Node List + Detail + Map/Charts) using Navigation 3 Scenes and `ThreePaneScaffold` for widths ≥ 1200dp.
- **Adaptive Layouts:** Use `currentWindowAdaptiveInfo(supportLargeAndXLargeWidth = true)` to support the 2026 Desktop Experience breakpoints. Prioritize **higher information density** and mouse-precision interactions for Desktop and External Display (Android 16 QPR3) targets. **Investigate 3-pane "Power User" scenes** (e.g., Node List + Detail + Map/Charts) using Navigation 3 Scenes, `extraPane()`, and draggable dividers (`VerticalDragHandle` + `paneExpansionState`) for widths ≥ 1200dp.
- **Platform/Flavor UI:** Inject platform-specific behavior (e.g., map providers) via `CompositionLocal` from `app`.
### B. Logic & Data Layer
@ -81,7 +81,7 @@ Meshtastic-Android is a Kotlin Multiplatform (KMP) application for off-grid, dec
- **Feature navigation graphs:** Feature modules export Navigation 3 graph functions as extension functions on `EntryProviderScope<NavKey>` in `commonMain` (e.g., `fun EntryProviderScope<NavKey>.settingsGraph(backStack: NavBackStack<NavKey>)`). Host shells (`app`, `desktop`) assemble these into a single `entryProvider<NavKey>` block. Do NOT define navigation graphs in platform-specific source sets.
- **Concurrency:** Use Kotlin Coroutines and Flow.
- **Dependency Injection:** Use **Koin Annotations** with the K2 compiler plugin (`koin-plugin` in version catalog). The `koin-annotations` library version is unified with `koin-core` (both use `version.ref = "koin"`). The `KoinConventionPlugin` uses the typed `KoinGradleExtension` to configure the K2 plugin (e.g., `compileSafety.set(false)`). Keep root graph assembly in `app`.
- **ViewModels:** Follow the MVI/UDF pattern. Use the multiplatform `androidx.lifecycle.ViewModel` in `commonMain`.
- **ViewModels:** Follow the MVI/UDF pattern. Use the multiplatform `androidx.lifecycle.ViewModel` in `commonMain`. Both `app` and `desktop` pass `ViewModelStoreNavEntryDecorator` to `NavDisplay`, so ViewModels obtained via `koinViewModel()` inside `entry<T>` blocks are scoped to the entry's backstack lifetime and cleared on pop.
- **BLE:** All Bluetooth communication must route through `core:ble` using Kable.
- **Networking:** Pure **Ktor** — no OkHttp anywhere. Engines: `ktor-client-android` for Android, `ktor-client-java` for desktop/JVM. Use Ktor `Logging` plugin for HTTP debug logging (not OkHttp interceptors). `HttpClient` is provided via Koin in `app/di/NetworkModule` and `core:network/di/CoreNetworkAndroidModule`.
- **Image Loading (Coil):** Use `coil-network-ktor3` with `KtorNetworkFetcherFactory` on **all** platforms. `ImageLoader` is configured in host modules only (`app` via Koin `@Single`, `desktop` via `setSingletonImageLoaderFactory`). Feature modules depend only on `libs.coil` (coil-compose) for `AsyncImage` — never add `coil-network-*` or `coil-svg` to feature modules.