feat: implement "seen" status indicator for repositories

- Add `isSeen` property to `DiscoveryRepositoryUi` to track if a repository has been viewed.
- Update `HomeViewModel` and `SearchViewModel` to observe seen repository IDs and reactively update the UI state.
- Initialize the `isSeen` status when mapping repository data in both home and search flows.
- Implement `SeenBadge` component in `RepositoryCard` to display a "Viewed" label with a visibility icon.
- Add "Viewed" localized string resource.
- Refactor `RepositoryCard` to display multiple badges (Installation status and Seen status) using a `Row` layout.

Author: rainxchzed

core/presentation/src/commonMain/composeResources/values/strings.xml

@@ -592,4 +592,5 @@
     <string name="clear_seen_history">Clear Seen History</string>
     <string name="clear_seen_history_description">Reset all seen repositories so they appear again in feeds</string>
     <string name="seen_history_cleared">Seen history cleared</string>
+    <string name="seen_badge">Viewed</string>
 </resources>

core/presentation/src/commonMain/kotlin/zed/rainxch/core/presentation/components/RepositoryCard.kt

@@ -23,6 +23,7 @@ import androidx.compose.material.icons.filled.OpenInBrowser
 import androidx.compose.material.icons.filled.Share
 import androidx.compose.material.icons.filled.Star
 import androidx.compose.material.icons.filled.Update
+import androidx.compose.material.icons.outlined.Visibility
 import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
@@ -54,6 +55,7 @@ import zed.rainxch.githubstore.core.presentation.res.forked_repository
 import zed.rainxch.githubstore.core.presentation.res.home_view_details
 import zed.rainxch.githubstore.core.presentation.res.installed
 import zed.rainxch.githubstore.core.presentation.res.open_in_browser
+import zed.rainxch.githubstore.core.presentation.res.seen_badge
 import zed.rainxch.githubstore.core.presentation.res.share_repository
 import zed.rainxch.githubstore.core.presentation.res.update_available
 
@@ -221,12 +223,23 @@ fun RepositoryCard(
                     }
                 }
 
-                if (discoveryRepositoryUi.isInstalled) {
+                if (discoveryRepositoryUi.isInstalled || discoveryRepositoryUi.isSeen) {
                     Spacer(Modifier.height(12.dp))
 
-                    InstallStatusBadge(
-                        isUpdateAvailable = discoveryRepositoryUi.isUpdateAvailable,
-                    )
+                    Row(
+                        horizontalArrangement = Arrangement.spacedBy(8.dp),
+                        verticalAlignment = Alignment.CenterVertically,
+                    ) {
+                        if (discoveryRepositoryUi.isInstalled) {
+                            InstallStatusBadge(
+                                isUpdateAvailable = discoveryRepositoryUi.isUpdateAvailable,
+                            )
+                        }
+
+                        if (discoveryRepositoryUi.isSeen) {
+                            SeenBadge()
+                        }
+                    }
                 }
 
                 if (discoveryRepositoryUi.repository.availablePlatforms.isNotEmpty()) {
@@ -434,6 +447,34 @@ fun InstallStatusBadge(
     }
 }
 
+@Composable
+fun SeenBadge(modifier: Modifier = Modifier) {
+    Surface(
+        modifier = modifier,
+        shape = RoundedCornerShape(12.dp),
+        color = MaterialTheme.colorScheme.surfaceContainerHighest,
+    ) {
+        Row(
+            modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.spacedBy(4.dp),
+        ) {
+            Icon(
+                imageVector = Icons.Outlined.Visibility,
+                contentDescription = null,
+                modifier = Modifier.size(14.dp),
+                tint = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            Text(
+                text = stringResource(Res.string.seen_badge),
+                style = MaterialTheme.typography.labelSmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                fontWeight = FontWeight.SemiBold,
+            )
+        }
+    }
+}
+
 @Preview
 @Composable
 fun RepositoryCardPreview() {

core/presentation/src/commonMain/kotlin/zed/rainxch/core/presentation/model/DiscoveryRepositoryUi.kt

@@ -5,5 +5,6 @@ data class DiscoveryRepositoryUi(
     val isUpdateAvailable: Boolean,
     val isFavourite: Boolean,
     val isStarred: Boolean,
+    val isSeen: Boolean = false,
     val repository: GithubRepoSummaryUi,
 )

feature/home/presentation/src/commonMain/kotlin/zed/rainxch/home/presentation/HomeViewModel.kt

@@ -202,6 +202,8 @@ class HomeViewModel(
                                 .first()
                                 .associateBy { it.repoId }
 
+                        val seenIds = _state.value.seenRepoIds
+
                         val newReposWithStatus =
                             paginatedRepos.repos.map { repo ->
                                 val app = installedAppsMap[repo.id]
@@ -212,6 +214,7 @@ class HomeViewModel(
                                     isInstalled = app != null,
                                     isFavourite = favourite != null,
                                     isStarred = starred != null,
+                                    isSeen = repo.id in seenIds,
                                     isUpdateAvailable = app?.isUpdateAvailable ?: false,
                                     repository = repo.toUi(),
                                 )
@@ -372,7 +375,16 @@ class HomeViewModel(
     private fun observeSeenRepos() {
         viewModelScope.launch {
             seenReposRepository.getAllSeenRepoIds().collect { ids ->
-                _state.update { it.copy(seenRepoIds = ids) }
+                _state.update { current ->
+                    current.copy(
+                        seenRepoIds = ids,
+                        repos =
+                            current.repos
+                                .map { repo ->
+                                    repo.copy(isSeen = repo.repository.id in ids)
+                                }.toImmutableList(),
+                    )
+                }
             }
         }
     }

feature/search/presentation/src/commonMain/kotlin/zed/rainxch/search/presentation/SearchViewModel.kt

@@ -103,7 +103,16 @@ class SearchViewModel(
     private fun observeSeenRepos() {
         viewModelScope.launch {
             seenReposRepository.getAllSeenRepoIds().collect { ids ->
-                _state.update { it.copy(seenRepoIds = ids) }
+                _state.update { current ->
+                    current.copy(
+                        seenRepoIds = ids,
+                        repositories =
+                            current.repositories
+                                .map { repo ->
+                                    repo.copy(isSeen = repo.repository.id in ids)
+                                }.toImmutableList(),
+                    )
+                }
             }
         }
     }
@@ -297,6 +306,8 @@ class SearchViewModel(
                         ).collect { paginatedRepos ->
                             currentPage = paginatedRepos.nextPageIndex
 
+                            val seenIds = _state.value.seenRepoIds
+
                             val newReposWithStatus =
                                 paginatedRepos.repos.map { repo ->
                                     val app = installedMap[repo.id]
@@ -307,6 +318,7 @@ class SearchViewModel(
                                         isInstalled = app != null,
                                         isFavourite = favourite != null,
                                         isStarred = starred != null,
+                                        isSeen = repo.id in seenIds,
                                         isUpdateAvailable = app?.isUpdateAvailable ?: false,
                                         repository = repo.toUi(),
                                     )