Fix WebSocket events being silently dropped on buffer overflow (#313)

* Fix WebSocket events being silently dropped on buffer overflow

Increases the MutableSharedFlow `extraBufferCapacity` from 64 to 256
and changes the `onBufferOverflow` policy to `BufferOverflow.DROP_OLDEST`
in `HermesWsClient.kt`. This fixes an issue where the slow collection
(e.g., due to DB writes) caused the buffer to fill up and silently drop
incoming real-time WebSocket events.

By setting `DROP_OLDEST`, `tryEmit()` remains functional without
suspending, allowing real-time events to be retained and prioritized.

Fixes #275

* Fix ktlint formatting issues in HermesWsClient.kt

The formatting changes adhere to ktlint rules required by the CI pipeline:
- Removed a trailing comma in MutableSharedFlow initialization to avoid multiline expression wrapping errors.
- Sorted imports to be in lexicographical order.

These formatting changes fix the failing CI check.

Fixes #275

* Fix WebSocket events being silently dropped on buffer overflow

Increases the MutableSharedFlow `extraBufferCapacity` from 64 to 256
and changes the `onBufferOverflow` policy to `BufferOverflow.DROP_OLDEST`
in `HermesWsClient.kt`. This fixes an issue where the slow collection
(e.g., due to DB writes) caused the buffer to fill up and silently drop
incoming real-time WebSocket events.

By setting `DROP_OLDEST`, `tryEmit()` remains functional without
suspending, allowing real-time events to be retained and prioritized.

Fixes #275

* Fix WebSocket events being silently dropped on buffer overflow

Increases the MutableSharedFlow extraBufferCapacity from 64 to 256
and changes the onBufferOverflow policy to BufferOverflow.DROP_OLDEST
in HermesWsClient.kt. This fixes an issue where the slow collection
(e.g., due to DB writes) caused the buffer to fill up and silently drop
incoming real-time WebSocket events.

By setting DROP_OLDEST, tryEmit() remains functional without
suspending, allowing real-time events to be retained and prioritized.

Fixes #275

* Fix WebSocket events being silently dropped on buffer overflow

Increases the MutableSharedFlow extraBufferCapacity from 64 to 256
and changes the onBufferOverflow policy to BufferOverflow.DROP_OLDEST
in HermesWsClient.kt. This fixes an issue where the slow collection
(e.g., due to DB writes) caused the buffer to fill up and silently drop
incoming real-time WebSocket events.

By setting DROP_OLDEST, tryEmit() remains functional without
suspending, allowing real-time events to be retained and prioritized.

Fixes #275

* Fix WebSocket events being silently dropped on buffer overflow

Increases the MutableSharedFlow extraBufferCapacity from 64 to 256
and changes the onBufferOverflow policy to BufferOverflow.DROP_OLDEST
in HermesWsClient.kt. This fixes an issue where the slow collection
(e.g., due to DB writes) caused the buffer to fill up and silently drop
incoming real-time WebSocket events.

By setting DROP_OLDEST, tryEmit() remains functional without
suspending, allowing real-time events to be retained and prioritized.

Fixes #275

---------

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/main/java/com/m57/hermescontrol/ui/kanban/KanbanScreen.kt

@@ -85,17 +85,16 @@ fun KanbanScreen(
         onOpenDrawer = onOpenDrawer,
         isRefreshing = state.isLoading,
         onRefresh = { viewModel.loadBoards() },
-    ) { paddingValues ->
+    ) {
         when {
             state.isLoading && state.boards.isEmpty() -> {
-                LoadingState(modifier = Modifier.padding(paddingValues))
+                LoadingState()
             }
 
             state.errorMessage != null -> {
                 ErrorState(
                     message = state.errorMessage ?: "",
                     onRetry = { viewModel.loadBoards() },
-                    modifier = Modifier.padding(paddingValues),
                 )
             }
 
@@ -107,11 +106,10 @@ fun KanbanScreen(
                         Text(
                             text = state.errorMessage ?: "",
                             color = MaterialTheme.colorScheme.error,
-                            modifier = Modifier.padding(paddingValues),
                         )
                     } else {
                         Column(
-                            modifier = Modifier.fillMaxSize().padding(paddingValues),
+                            modifier = Modifier.fillMaxSize(),
                         ) {
                             SearchBar(
                                 query = query,
@@ -149,7 +147,7 @@ fun KanbanScreen(
                                     contentPadding = PaddingValues(16.dp),
                                     horizontalArrangement = Arrangement.spacedBy(16.dp),
                                 ) {
-                                    items(state.columns) { column ->
+                                    items(state.columns, key = { it.name }) { column ->
                                         val colName = column.name
                                         val colTasks =
                                             filteredTasks.filter {
@@ -178,7 +176,7 @@ fun KanbanScreen(
                                                 modifier = Modifier.weight(1f),
                                                 verticalArrangement = Arrangement.spacedBy(8.dp),
                                             ) {
-                                                items(colTasks) { task ->
+                                                items(colTasks, key = { it.id }) { task ->
                                                     TaskCard(
                                                         task = task,
                                                         onMoveLeft =