feat: display no jobs message on worker home screen

This commit introduces a "No Jobs Message" component to be displayed on the worker home screen when no jobs
 are available.

- Added a new composable function `NoJobsMessage` to display an informative message when no jobs are found.
- Updated the `WorkerHomeScreenUiState` to include an error message field.
- Modified the worker home screen to display the `NoJobsMessage` component when the list of
 jobs is empty.

app/src/main/java/com/samuelokello/kazihub/presentation/common/components/NoJobsMessage.kt

@@ -0,0 +1,54 @@
+package com.samuelokello.kazihub.presentation.common.components
+
+import androidx.annotation.StringRes
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Info
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun NoJobsMessage(@StringRes message: Int) {
+    Column(
+        modifier =
+        Modifier
+            .padding(8.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+    ) {
+        Icon(
+            imageVector = Icons.Default.Info,
+            contentDescription = null,
+            modifier = Modifier.size(64.dp),
+            tint = Color.Gray,
+        )
+        Spacer(modifier = Modifier.height(16.dp))
+        Text(
+            text = "No jobs posted yet",
+            style = MaterialTheme.typography.bodyLarge,
+            color = Color.Gray,
+        )
+        Spacer(modifier = Modifier.height(8.dp))
+        Text(
+            text = stringResource(message),
+            style = MaterialTheme.typography.bodyLarge,
+            color = Color.Gray,
+            textAlign = TextAlign.Center,
+        )
+
+        Spacer(modifier = Modifier.height(32.dp))
+    }
+}

app/src/main/java/com/samuelokello/kazihub/presentation/worker/data/WorkerHomeScreenUiState.kt

@@ -8,10 +8,8 @@ data class WorkerHomeScreenUiState(
     val drawerState: DrawerValue = DrawerValue.Closed,
     val isSearchBarActive: Boolean = false,
     val selectedItemIndex: Int = 0,
-    val allJobs: List<Job?> = emptyList(),
-
-    // Recent Jobs
-    val recentJobs: List<Job> = emptyList(),
-    val nearByJobs: List<Job?> = emptyList()
-
+    val allData: List<data?> = emptyList(),
+    val error: String = "",
+    val recentJobs: List<data> = emptyList(),
+    val nearByJobs: List<data?> = emptyList(),
 )

app/src/main/java/com/samuelokello/kazihub/presentation/worker/state/WorkerHomeScreenUiEvent.kt

@@ -1,14 +1,10 @@
 package com.samuelokello.kazihub.presentation.worker.state
 
-import com.samuelokello.kazihub.domain.model.job.Job
+import com.samuelokello.kazihub.domain.model.job.data
 
 sealed interface WorkerHomeScreenUiEvent {
     data object OpenDrawer : WorkerHomeScreenUiEvent
-    data object OnSearchClick : WorkerHomeScreenUiEvent
     data object OnPullToRefresh : WorkerHomeScreenUiEvent
-    data class NavigateToJobDetails(val jobId: Int) : WorkerHomeScreenUiEvent
-    data class SearchQueryChanged(val query: String) : WorkerHomeScreenUiEvent
     data object OnViewAllClick : WorkerHomeScreenUiEvent
-    data object OnSHowAllClick : WorkerHomeScreenUiEvent
-    data class JobSelected(val job: Job) : WorkerHomeScreenUiEvent
+    data class JobSelected(val data: data) : WorkerHomeScreenUiEvent
 }