feat: add multi-account support with account switcher and data isolation

app/src/main/java/com/swoosh/microblog/MainActivity.kt

@@ -5,7 +5,7 @@ import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
 import androidx.navigation.compose.rememberNavController
-import com.swoosh.microblog.data.CredentialsManager
+import com.swoosh.microblog.data.AccountManager
 import com.swoosh.microblog.ui.navigation.Routes
 import com.swoosh.microblog.ui.navigation.SwooshNavGraph
 import com.swoosh.microblog.ui.theme.SwooshTheme
@@ -15,8 +15,8 @@ class MainActivity : ComponentActivity() {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
 
-        val credentials = CredentialsManager(this)
-        val startDestination = if (credentials.isConfigured) Routes.FEED else Routes.SETUP
+        val accountManager = AccountManager(this)
+        val startDestination = if (accountManager.isConfigured) Routes.FEED else Routes.SETUP
 
         setContent {
             SwooshTheme {

app/src/main/java/com/swoosh/microblog/data/AccountManager.kt

@@ -0,0 +1,214 @@
+package com.swoosh.microblog.data
+
+import android.content.Context
+import android.content.SharedPreferences
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKey
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+import com.swoosh.microblog.data.model.GhostAccount
+import java.util.UUID
+
+class AccountManager private constructor(
+    private val prefs: SharedPreferences,
+    private val shouldMigrate: Boolean = true
+) {
+
+    private val gson = Gson()
+
+    companion object {
+        const val KEY_ACCOUNTS = "ghost_accounts"
+        const val KEY_ACTIVE_ACCOUNT_ID = "active_account_id"
+        const val MAX_ACCOUNTS = 5
+
+        // Legacy keys for migration
+        private const val LEGACY_KEY_GHOST_URL = "ghost_url"
+        private const val LEGACY_KEY_ADMIN_API_KEY = "admin_api_key"
+        private const val KEY_MIGRATION_DONE = "multi_account_migration_done"
+
+        private fun createEncryptedPrefs(context: Context): SharedPreferences {
+            val masterKey = MasterKey.Builder(context)
+                .setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
+                .build()
+
+            return EncryptedSharedPreferences.create(
+                context,
+                "swoosh_secure_prefs",
+                masterKey,
+                EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+                EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+            )
+        }
+    }
+
+    constructor(context: Context) : this(createEncryptedPrefs(context), shouldMigrate = true)
+
+    /** Constructor for testing with plain SharedPreferences */
+    constructor(prefs: SharedPreferences) : this(prefs, shouldMigrate = true)
+
+    init {
+        if (shouldMigrate) {
+            migrateIfNeeded()
+        }
+    }
+
+    private fun migrateIfNeeded() {
+        if (prefs.getBoolean(KEY_MIGRATION_DONE, false)) return
+
+        val legacyUrl = prefs.getString(LEGACY_KEY_GHOST_URL, null)
+        val legacyKey = prefs.getString(LEGACY_KEY_ADMIN_API_KEY, null)
+
+        if (!legacyUrl.isNullOrBlank() && !legacyKey.isNullOrBlank()) {
+            val account = GhostAccount(
+                id = UUID.randomUUID().toString(),
+                name = extractBlogName(legacyUrl),
+                blogUrl = legacyUrl,
+                apiKey = legacyKey,
+                isActive = true,
+                colorIndex = 0
+            )
+            val accounts = listOf(account)
+            saveAccountsList(accounts)
+            prefs.edit().putString(KEY_ACTIVE_ACCOUNT_ID, account.id).apply()
+
+            // Remove legacy keys
+            prefs.edit()
+                .remove(LEGACY_KEY_GHOST_URL)
+                .remove(LEGACY_KEY_ADMIN_API_KEY)
+                .apply()
+        }
+
+        prefs.edit().putBoolean(KEY_MIGRATION_DONE, true).apply()
+    }
+
+    fun getAccounts(): List<GhostAccount> {
+        val json = prefs.getString(KEY_ACCOUNTS, null) ?: return emptyList()
+        val type = object : TypeToken<List<GhostAccount>>() {}.type
+        return try {
+            val accounts: List<GhostAccount> = gson.fromJson(json, type)
+            val activeId = prefs.getString(KEY_ACTIVE_ACCOUNT_ID, null)
+            accounts.map { it.copy(isActive = it.id == activeId) }
+        } catch (e: Exception) {
+            emptyList()
+        }
+    }
+
+    fun getActiveAccount(): GhostAccount? {
+        val activeId = prefs.getString(KEY_ACTIVE_ACCOUNT_ID, null) ?: return null
+        return getAccounts().find { it.id == activeId }
+    }
+
+    fun addAccount(name: String, blogUrl: String, apiKey: String): Result<GhostAccount> {
+        val accounts = getAccounts()
+        if (accounts.size >= MAX_ACCOUNTS) {
+            return Result.failure(IllegalStateException("Maximum of $MAX_ACCOUNTS accounts reached"))
+        }
+
+        val colorIndex = nextAvailableColorIndex(accounts)
+        val account = GhostAccount(
+            id = UUID.randomUUID().toString(),
+            name = name.ifBlank { extractBlogName(blogUrl) },
+            blogUrl = blogUrl,
+            apiKey = apiKey,
+            isActive = true,
+            colorIndex = colorIndex
+        )
+
+        val updatedAccounts = accounts + account
+        saveAccountsList(updatedAccounts)
+        setActiveAccount(account.id)
+
+        return Result.success(account)
+    }
+
+    fun removeAccount(id: String): Boolean {
+        val accounts = getAccounts().toMutableList()
+        val removed = accounts.removeAll { it.id == id }
+        if (!removed) return false
+
+        saveAccountsList(accounts)
+
+        // If the removed account was active, switch to first available
+        val activeId = prefs.getString(KEY_ACTIVE_ACCOUNT_ID, null)
+        if (activeId == id) {
+            val nextAccount = accounts.firstOrNull()
+            if (nextAccount != null) {
+                setActiveAccount(nextAccount.id)
+            } else {
+                prefs.edit().remove(KEY_ACTIVE_ACCOUNT_ID).apply()
+            }
+        }
+
+        return true
+    }
+
+    fun setActiveAccount(id: String): Boolean {
+        val accounts = getAccounts()
+        if (accounts.none { it.id == id }) return false
+        prefs.edit().putString(KEY_ACTIVE_ACCOUNT_ID, id).apply()
+        return true
+    }
+
+    fun updateAccount(id: String, name: String? = null, blogUrl: String? = null, apiKey: String? = null): Boolean {
+        val accounts = getAccounts().toMutableList()
+        val index = accounts.indexOfFirst { it.id == id }
+        if (index == -1) return false
+
+        val current = accounts[index]
+        accounts[index] = current.copy(
+            name = name ?: current.name,
+            blogUrl = blogUrl ?: current.blogUrl,
+            apiKey = apiKey ?: current.apiKey
+        )
+
+        saveAccountsList(accounts)
+        return true
+    }
+
+    val isConfigured: Boolean
+        get() = getActiveAccount() != null
+
+    val hasAnyAccount: Boolean
+        get() = getAccounts().isNotEmpty()
+
+    fun clearAll() {
+        prefs.edit()
+            .remove(KEY_ACCOUNTS)
+            .remove(KEY_ACTIVE_ACCOUNT_ID)
+            .remove(KEY_MIGRATION_DONE)
+            .apply()
+    }
+
+    private fun saveAccountsList(accounts: List<GhostAccount>) {
+        // Strip isActive before saving since it's derived from KEY_ACTIVE_ACCOUNT_ID
+        val toSave = accounts.map { it.copy(isActive = false) }
+        val json = gson.toJson(toSave)
+        prefs.edit().putString(KEY_ACCOUNTS, json).apply()
+    }
+
+    private fun nextAvailableColorIndex(accounts: List<GhostAccount>): Int {
+        val usedIndices = accounts.map { it.colorIndex }.toSet()
+        for (i in 0 until GhostAccount.ACCOUNT_COLORS.size) {
+            if (i !in usedIndices) return i
+        }
+        return accounts.size % GhostAccount.ACCOUNT_COLORS.size
+    }
+
+    internal fun extractBlogName(url: String): String {
+        return try {
+            val cleaned = url.trim()
+                .removePrefix("https://")
+                .removePrefix("http://")
+                .removeSuffix("/")
+            val host = cleaned.split("/").first()
+            // Remove common suffixes
+            host.removeSuffix(".ghost.io")
+                .removeSuffix(".com")
+                .removeSuffix(".org")
+                .removeSuffix(".net")
+                .replaceFirstChar { it.uppercase() }
+        } catch (e: Exception) {
+            "My Blog"
+        }
+    }
+}

app/src/main/java/com/swoosh/microblog/data/CredentialsManager.kt

@@ -1,41 +1,34 @@
 package com.swoosh.microblog.data
 
 import android.content.Context
-import android.content.SharedPreferences
-import androidx.security.crypto.EncryptedSharedPreferences
-import androidx.security.crypto.MasterKey
 
+/**
+ * Legacy compatibility wrapper. Now delegates to AccountManager.
+ * Kept for backward compatibility during migration.
+ */
 class CredentialsManager(context: Context) {
 
-    private val masterKey = MasterKey.Builder(context)
-        .setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
-        .build()
-
-    private val prefs: SharedPreferences = EncryptedSharedPreferences.create(
-        context,
-        "swoosh_secure_prefs",
-        masterKey,
-        EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
-        EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
-    )
+    private val accountManager = AccountManager(context)
 
     var ghostUrl: String?
-        get() = prefs.getString(KEY_GHOST_URL, null)
-        set(value) = prefs.edit().putString(KEY_GHOST_URL, value).apply()
+        get() = accountManager.getActiveAccount()?.blogUrl
+        set(_) {
+            // No-op: use AccountManager directly for mutations
+        }
 
     var adminApiKey: String?
-        get() = prefs.getString(KEY_ADMIN_API_KEY, null)
-        set(value) = prefs.edit().putString(KEY_ADMIN_API_KEY, value).apply()
+        get() = accountManager.getActiveAccount()?.apiKey
+        set(_) {
+            // No-op: use AccountManager directly for mutations
+        }
 
     val isConfigured: Boolean
-        get() = !ghostUrl.isNullOrBlank() && !adminApiKey.isNullOrBlank()
+        get() = accountManager.isConfigured
 
     fun clear() {
-        prefs.edit().clear().apply()
+        val activeAccount = accountManager.getActiveAccount()
+        if (activeAccount != null) {
+            accountManager.removeAccount(activeAccount.id)
         }
-
-    companion object {
-        private const val KEY_GHOST_URL = "ghost_url"
-        private const val KEY_ADMIN_API_KEY = "admin_api_key"
     }
 }

app/src/main/java/com/swoosh/microblog/data/db/AppDatabase.kt

@@ -5,9 +5,11 @@ import androidx.room.Database
 import androidx.room.Room
 import androidx.room.RoomDatabase
 import androidx.room.TypeConverters
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
 import com.swoosh.microblog.data.model.LocalPost
 
-@Database(entities = [LocalPost::class], version = 1, exportSchema = false)
+@Database(entities = [LocalPost::class], version = 2, exportSchema = false)
 @TypeConverters(Converters::class)
 abstract class AppDatabase : RoomDatabase() {
 
@@ -17,13 +19,21 @@ abstract class AppDatabase : RoomDatabase() {
         @Volatile
         private var INSTANCE: AppDatabase? = null
 
+        val MIGRATION_1_2 = object : Migration(1, 2) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                db.execSQL("ALTER TABLE local_posts ADD COLUMN accountId TEXT NOT NULL DEFAULT ''")
+            }
+        }
+
         fun getInstance(context: Context): AppDatabase {
             return INSTANCE ?: synchronized(this) {
                 val instance = Room.databaseBuilder(
                     context.applicationContext,
                     AppDatabase::class.java,
                     "swoosh_database"
-                ).build()
+                )
+                    .addMigrations(MIGRATION_1_2)
+                    .build()
                 INSTANCE = instance
                 instance
             }

app/src/main/java/com/swoosh/microblog/data/db/LocalPostDao.kt

@@ -11,11 +11,20 @@ interface LocalPostDao {
     @Query("SELECT * FROM local_posts ORDER BY updatedAt DESC")
     fun getAllPosts(): Flow<List<LocalPost>>
 
+    @Query("SELECT * FROM local_posts WHERE accountId = :accountId ORDER BY updatedAt DESC")
+    fun getPostsByAccount(accountId: String): Flow<List<LocalPost>>
+
     @Query("SELECT * FROM local_posts WHERE queueStatus IN (:statuses) ORDER BY createdAt ASC")
     suspend fun getQueuedPosts(
         statuses: List<QueueStatus> = listOf(QueueStatus.QUEUED_PUBLISH, QueueStatus.QUEUED_SCHEDULED)
     ): List<LocalPost>
 
+    @Query("SELECT * FROM local_posts WHERE accountId = :accountId AND queueStatus IN (:statuses) ORDER BY createdAt ASC")
+    suspend fun getQueuedPostsByAccount(
+        accountId: String,
+        statuses: List<QueueStatus> = listOf(QueueStatus.QUEUED_PUBLISH, QueueStatus.QUEUED_SCHEDULED)
+    ): List<LocalPost>
+
     @Query("SELECT * FROM local_posts WHERE localId = :localId")
     suspend fun getPostById(localId: Long): LocalPost?
 

app/src/main/java/com/swoosh/microblog/data/model/GhostAccount.kt

@@ -0,0 +1,24 @@
+package com.swoosh.microblog.data.model
+
+data class GhostAccount(
+    val id: String,
+    val name: String,
+    val blogUrl: String,
+    val apiKey: String,
+    val isActive: Boolean = false,
+    val colorIndex: Int = 0
+) {
+    companion object {
+        val ACCOUNT_COLORS = listOf(
+            0xFF6750A4, // Purple
+            0xFF00796B, // Teal
+            0xFFD32F2F, // Red
+            0xFF1976D2, // Blue
+            0xFFF57C00, // Orange
+        )
+
+        fun colorForIndex(index: Int): Long {
+            return ACCOUNT_COLORS[index % ACCOUNT_COLORS.size]
+        }
+    }
+}

app/src/main/java/com/swoosh/microblog/data/model/GhostModels.kt

@@ -56,6 +56,7 @@ data class LocalPost(
     @PrimaryKey(autoGenerate = true)
     val localId: Long = 0,
     val ghostId: String? = null,
+    val accountId: String = "",
     val title: String = "",
     val content: String = "",
     val htmlContent: String? = null,

app/src/main/java/com/swoosh/microblog/data/repository/PostRepository.kt

@@ -2,7 +2,7 @@ package com.swoosh.microblog.data.repository
 
 import android.content.Context
 import android.net.Uri
-import com.swoosh.microblog.data.CredentialsManager
+import com.swoosh.microblog.data.AccountManager
 import com.swoosh.microblog.data.api.ApiClient
 import com.swoosh.microblog.data.api.GhostApiService
 import com.swoosh.microblog.data.db.AppDatabase
@@ -20,12 +20,17 @@ import java.io.FileOutputStream
 
 class PostRepository(private val context: Context) {
 
-    private val credentials = CredentialsManager(context)
+    private val accountManager = AccountManager(context)
     private val dao: LocalPostDao = AppDatabase.getInstance(context).localPostDao()
 
+    fun getActiveAccountId(): String {
+        return accountManager.getActiveAccount()?.id ?: ""
+    }
+
     private fun getApi(): GhostApiService {
-        val url = credentials.ghostUrl ?: throw IllegalStateException("Ghost URL not configured")
-        return ApiClient.getService(url) { credentials.adminApiKey }
+        val account = accountManager.getActiveAccount()
+            ?: throw IllegalStateException("No active account configured")
+        return ApiClient.getService(account.blogUrl) { account.apiKey }
     }
 
     // --- Remote operations ---
@@ -122,11 +127,25 @@ class PostRepository(private val context: Context) {
 
     // --- Local operations ---
 
-    fun getLocalPosts(): Flow<List<LocalPost>> = dao.getAllPosts()
+    fun getLocalPosts(): Flow<List<LocalPost>> {
+        val accountId = getActiveAccountId()
+        return if (accountId.isNotEmpty()) {
+            dao.getPostsByAccount(accountId)
+        } else {
+            dao.getAllPosts()
+        }
+    }
 
     suspend fun getQueuedPosts(): List<LocalPost> = dao.getQueuedPosts()
 
-    suspend fun saveLocalPost(post: LocalPost): Long = dao.insertPost(post)
+    suspend fun saveLocalPost(post: LocalPost): Long {
+        val postWithAccount = if (post.accountId.isEmpty()) {
+            post.copy(accountId = getActiveAccountId())
+        } else {
+            post
+        }
+        return dao.insertPost(postWithAccount)
+    }
 
     suspend fun updateLocalPost(post: LocalPost) = dao.updatePost(post)
 

app/src/main/java/com/swoosh/microblog/ui/feed/FeedScreen.kt

@@ -1,13 +1,19 @@
 package com.swoosh.microblog.ui.feed
 
+import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material.ExperimentalMaterialApi
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Check
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material.icons.filled.Edit
+import androidx.compose.material.icons.filled.KeyboardArrowDown
 import androidx.compose.material.icons.filled.Refresh
 import androidx.compose.material.icons.filled.Settings
 import androidx.compose.material.icons.filled.WifiOff
@@ -19,6 +25,7 @@ import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
@@ -27,6 +34,7 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
 import com.swoosh.microblog.data.model.FeedPost
+import com.swoosh.microblog.data.model.GhostAccount
 import com.swoosh.microblog.data.model.QueueStatus
 
 @OptIn(ExperimentalMaterial3Api::class, ExperimentalMaterialApi::class)
@@ -35,11 +43,18 @@ fun FeedScreen(
     onSettingsClick: () -> Unit,
     onPostClick: (FeedPost) -> Unit,
     onCompose: () -> Unit,
+    onAddAccount: () -> Unit = {},
     viewModel: FeedViewModel = viewModel()
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
+    val accounts by viewModel.accounts.collectAsStateWithLifecycle()
+    val activeAccount by viewModel.activeAccount.collectAsStateWithLifecycle()
     val listState = rememberLazyListState()
 
+    var showAccountSwitcher by remember { mutableStateOf(false) }
+    var showDeleteConfirmation by remember { mutableStateOf<GhostAccount?>(null) }
+    var showRenameDialog by remember { mutableStateOf<GhostAccount?>(null) }
+
     // Pull-to-refresh
     val pullRefreshState = rememberPullRefreshState(
         refreshing = state.isRefreshing,
@@ -63,7 +78,51 @@ fun FeedScreen(
     Scaffold(
         topBar = {
             TopAppBar(
-                title = { Text("Swoosh") },
+                title = {
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
+                        modifier = Modifier.clickable { showAccountSwitcher = true }
+                    ) {
+                        // Account color indicator
+                        if (activeAccount != null) {
+                            AccountAvatar(
+                                account = activeAccount!!,
+                                size = 28
+                            )
+                            Spacer(modifier = Modifier.width(8.dp))
+                        }
+
+                        Column {
+                            Text(
+                                text = activeAccount?.name ?: "Swoosh",
+                                style = MaterialTheme.typography.titleMedium,
+                                maxLines = 1,
+                                overflow = TextOverflow.Ellipsis
+                            )
+                            if (activeAccount != null) {
+                                Text(
+                                    text = activeAccount!!.blogUrl
+                                        .removePrefix("https://")
+                                        .removePrefix("http://")
+                                        .removeSuffix("/"),
+                                    style = MaterialTheme.typography.labelSmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    maxLines = 1,
+                                    overflow = TextOverflow.Ellipsis
+                                )
+                            }
+                        }
+
+                        if (accounts.size > 1 || accounts.isNotEmpty()) {
+                            Icon(
+                                Icons.Default.KeyboardArrowDown,
+                                contentDescription = "Switch account",
+                                modifier = Modifier.size(20.dp),
+                                tint = MaterialTheme.colorScheme.onSurfaceVariant
+                            )
+                        }
+                    }
+                },
                 actions = {
                     IconButton(onClick = { viewModel.refresh() }) {
                         Icon(Icons.Default.Refresh, contentDescription = "Refresh")
@@ -86,6 +145,23 @@ fun FeedScreen(
                 .padding(padding)
                 .pullRefresh(pullRefreshState)
         ) {
+            // Loading overlay during account switch
+            if (state.isSwitchingAccount) {
+                Box(
+                    modifier = Modifier.fillMaxSize(),
+                    contentAlignment = Alignment.Center
+                ) {
+                    Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                        CircularProgressIndicator()
+                        Spacer(modifier = Modifier.height(16.dp))
+                        Text(
+                            text = "Switching account...",
+                            style = MaterialTheme.typography.bodyMedium,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                    }
+                }
+            } else {
                 if (state.posts.isEmpty() && !state.isRefreshing) {
                     if (state.isConnectionError && state.error != null) {
                         // Connection error empty state
@@ -166,6 +242,7 @@ fun FeedScreen(
                         }
                     }
                 }
+            }
 
             PullRefreshIndicator(
                 refreshing = state.isRefreshing,
@@ -189,6 +266,255 @@ fun FeedScreen(
             }
         }
     }
+
+    // Account switcher bottom sheet
+    if (showAccountSwitcher) {
+        AccountSwitcherBottomSheet(
+            accounts = accounts,
+            activeAccountId = activeAccount?.id,
+            onAccountSelected = { accountId ->
+                showAccountSwitcher = false
+                viewModel.switchAccount(accountId)
+            },
+            onAddAccount = {
+                showAccountSwitcher = false
+                onAddAccount()
+            },
+            onDeleteAccount = { account ->
+                showDeleteConfirmation = account
+            },
+            onRenameAccount = { account ->
+                showRenameDialog = account
+            },
+            onDismiss = { showAccountSwitcher = false }
+        )
+    }
+
+    // Delete confirmation dialog
+    showDeleteConfirmation?.let { account ->
+        AlertDialog(
+            onDismissRequest = { showDeleteConfirmation = null },
+            title = { Text("Remove Account") },
+            text = { Text("Remove \"${account.name}\"? Local drafts for this account will be kept.") },
+            confirmButton = {
+                TextButton(
+                    onClick = {
+                        viewModel.removeAccount(account.id)
+                        showDeleteConfirmation = null
+                        if (accounts.size <= 1) {
+                            showAccountSwitcher = false
+                        }
+                    },
+                    colors = ButtonDefaults.textButtonColors(
+                        contentColor = MaterialTheme.colorScheme.error
+                    )
+                ) { Text("Remove") }
+            },
+            dismissButton = {
+                TextButton(onClick = { showDeleteConfirmation = null }) { Text("Cancel") }
+            }
+        )
+    }
+
+    // Rename dialog
+    showRenameDialog?.let { account ->
+        var newName by remember { mutableStateOf(account.name) }
+        AlertDialog(
+            onDismissRequest = { showRenameDialog = null },
+            title = { Text("Rename Account") },
+            text = {
+                OutlinedTextField(
+                    value = newName,
+                    onValueChange = { newName = it },
+                    label = { Text("Account Name") },
+                    singleLine = true,
+                    modifier = Modifier.fillMaxWidth()
+                )
+            },
+            confirmButton = {
+                TextButton(
+                    onClick = {
+                        if (newName.isNotBlank()) {
+                            viewModel.renameAccount(account.id, newName)
+                            showRenameDialog = null
+                        }
+                    }
+                ) { Text("Save") }
+            },
+            dismissButton = {
+                TextButton(onClick = { showRenameDialog = null }) { Text("Cancel") }
+            }
+        )
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun AccountSwitcherBottomSheet(
+    accounts: List<GhostAccount>,
+    activeAccountId: String?,
+    onAccountSelected: (String) -> Unit,
+    onAddAccount: () -> Unit,
+    onDeleteAccount: (GhostAccount) -> Unit,
+    onRenameAccount: (GhostAccount) -> Unit,
+    onDismiss: () -> Unit
+) {
+    val sheetState = rememberModalBottomSheetState()
+
+    ModalBottomSheet(
+        onDismissRequest = onDismiss,
+        sheetState = sheetState
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(bottom = 32.dp)
+        ) {
+            Text(
+                text = "Accounts",
+                style = MaterialTheme.typography.titleMedium,
+                modifier = Modifier.padding(horizontal = 24.dp, vertical = 8.dp)
+            )
+
+            accounts.forEach { account ->
+                AccountListItem(
+                    account = account,
+                    isActive = account.id == activeAccountId,
+                    onClick = { onAccountSelected(account.id) },
+                    onDelete = { onDeleteAccount(account) },
+                    onRename = { onRenameAccount(account) }
+                )
+            }
+
+            if (accounts.size < 5) {
+                HorizontalDivider(modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp))
+
+                ListItem(
+                    headlineContent = { Text("Add account") },
+                    leadingContent = {
+                        Icon(
+                            Icons.Default.Add,
+                            contentDescription = "Add account",
+                            tint = MaterialTheme.colorScheme.primary
+                        )
+                    },
+                    modifier = Modifier.clickable(onClick = onAddAccount)
+                )
+            }
+        }
+    }
+}
+
+@Composable
+fun AccountListItem(
+    account: GhostAccount,
+    isActive: Boolean,
+    onClick: () -> Unit,
+    onDelete: () -> Unit,
+    onRename: () -> Unit
+) {
+    var showMenu by remember { mutableStateOf(false) }
+
+    ListItem(
+        headlineContent = {
+            Text(
+                account.name,
+                style = MaterialTheme.typography.bodyLarge,
+                color = if (isActive) MaterialTheme.colorScheme.primary
+                        else MaterialTheme.colorScheme.onSurface
+            )
+        },
+        supportingContent = {
+            Text(
+                account.blogUrl
+                    .removePrefix("https://")
+                    .removePrefix("http://")
+                    .removeSuffix("/"),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+        },
+        leadingContent = {
+            AccountAvatar(account = account, size = 36)
+        },
+        trailingContent = {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                if (isActive) {
+                    Icon(
+                        Icons.Default.Check,
+                        contentDescription = "Active",
+                        tint = MaterialTheme.colorScheme.primary,
+                        modifier = Modifier.size(20.dp)
+                    )
+                    Spacer(modifier = Modifier.width(4.dp))
+                }
+                Box {
+                    IconButton(onClick = { showMenu = true }) {
+                        Icon(
+                            Icons.Default.Edit,
+                            contentDescription = "More options",
+                            modifier = Modifier.size(18.dp)
+                        )
+                    }
+                    DropdownMenu(
+                        expanded = showMenu,
+                        onDismissRequest = { showMenu = false }
+                    ) {
+                        DropdownMenuItem(
+                            text = { Text("Rename") },
+                            onClick = {
+                                showMenu = false
+                                onRename()
+                            },
+                            leadingIcon = {
+                                Icon(Icons.Default.Edit, contentDescription = null, modifier = Modifier.size(18.dp))
+                            }
+                        )
+                        DropdownMenuItem(
+                            text = { Text("Remove", color = MaterialTheme.colorScheme.error) },
+                            onClick = {
+                                showMenu = false
+                                onDelete()
+                            },
+                            leadingIcon = {
+                                Icon(
+                                    Icons.Default.Delete,
+                                    contentDescription = null,
+                                    modifier = Modifier.size(18.dp),
+                                    tint = MaterialTheme.colorScheme.error
+                                )
+                            }
+                        )
+                    }
+                }
+            }
+        },
+        modifier = Modifier.clickable(onClick = onClick)
+    )
+}
+
+@Composable
+fun AccountAvatar(
+    account: GhostAccount,
+    size: Int = 36
+) {
+    val color = Color(GhostAccount.colorForIndex(account.colorIndex))
+    val initial = account.name.firstOrNull()?.uppercase() ?: "?"
+
+    Box(
+        modifier = Modifier
+            .size(size.dp)
+            .clip(CircleShape)
+            .background(color),
+        contentAlignment = Alignment.Center
+    ) {
+        Text(
+            text = initial,
+            color = Color.White,
+            style = if (size <= 28) MaterialTheme.typography.labelSmall
+                    else MaterialTheme.typography.labelLarge
+        )
+    }
 }
 
 @Composable

app/src/main/java/com/swoosh/microblog/ui/feed/FeedViewModel.kt

@@ -3,8 +3,11 @@ package com.swoosh.microblog.ui.feed
 import android.app.Application
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.viewModelScope
+import com.swoosh.microblog.data.AccountManager
+import com.swoosh.microblog.data.api.ApiClient
 import com.swoosh.microblog.data.model.*
 import com.swoosh.microblog.data.repository.PostRepository
+import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.launch
 import java.net.ConnectException
@@ -18,22 +21,37 @@ import javax.net.ssl.SSLException
 
 class FeedViewModel(application: Application) : AndroidViewModel(application) {
 
-    private val repository = PostRepository(application)
+    private val accountManager = AccountManager(application)
+    private var repository = PostRepository(application)
 
     private val _uiState = MutableStateFlow(FeedUiState())
     val uiState: StateFlow<FeedUiState> = _uiState.asStateFlow()
 
+    private val _accounts = MutableStateFlow<List<GhostAccount>>(emptyList())
+    val accounts: StateFlow<List<GhostAccount>> = _accounts.asStateFlow()
+
+    private val _activeAccount = MutableStateFlow<GhostAccount?>(null)
+    val activeAccount: StateFlow<GhostAccount?> = _activeAccount.asStateFlow()
+
     private var currentPage = 1
     private var hasMorePages = true
     private var remotePosts = listOf<FeedPost>()
+    private var localPostsJob: Job? = null
 
     init {
+        refreshAccountsList()
         observeLocalPosts()
         refresh()
     }
 
+    fun refreshAccountsList() {
+        _accounts.value = accountManager.getAccounts()
+        _activeAccount.value = accountManager.getActiveAccount()
+    }
+
     private fun observeLocalPosts() {
-        viewModelScope.launch {
+        localPostsJob?.cancel()
+        localPostsJob = viewModelScope.launch {
             repository.getLocalPosts().collect { localPosts ->
                 val queuedPosts = localPosts
                     .filter { it.queueStatus != QueueStatus.NONE }
@@ -43,6 +61,64 @@ class FeedViewModel(application: Application) : AndroidViewModel(application) {
         }
     }
 
+    fun switchAccount(accountId: String) {
+        if (accountId == _activeAccount.value?.id) return
+
+        viewModelScope.launch {
+            _uiState.update { it.copy(isSwitchingAccount = true) }
+
+            accountManager.setActiveAccount(accountId)
+            ApiClient.reset()
+
+            // Re-create repository to pick up new account
+            repository = PostRepository(getApplication())
+
+            refreshAccountsList()
+
+            // Clear current state
+            remotePosts = emptyList()
+            currentPage = 1
+            hasMorePages = true
+            _uiState.update {
+                it.copy(
+                    posts = emptyList(),
+                    error = null,
+                    isConnectionError = false,
+                    isSwitchingAccount = false
+                )
+            }
+
+            // Re-observe local posts for new account
+            observeLocalPosts()
+
+            // Refresh from new account's API
+            refresh()
+        }
+    }
+
+    fun removeAccount(accountId: String) {
+        val wasActive = _activeAccount.value?.id == accountId
+        accountManager.removeAccount(accountId)
+        refreshAccountsList()
+
+        if (wasActive) {
+            val nextAccount = accountManager.getActiveAccount()
+            if (nextAccount != null) {
+                switchAccount(nextAccount.id)
+            } else {
+                // No accounts left
+                _uiState.update {
+                    it.copy(posts = emptyList(), error = null, isConnectionError = false)
+                }
+            }
+        }
+    }
+
+    fun renameAccount(accountId: String, newName: String) {
+        accountManager.updateAccount(accountId, name = newName)
+        refreshAccountsList()
+    }
+
     fun refresh() {
         viewModelScope.launch {
             _uiState.update { it.copy(isRefreshing = true, error = null, isConnectionError = false) }
@@ -179,6 +255,7 @@ data class FeedUiState(
     val posts: List<FeedPost> = emptyList(),
     val isRefreshing: Boolean = false,
     val isLoadingMore: Boolean = false,
+    val isSwitchingAccount: Boolean = false,
     val error: String? = null,
     val isConnectionError: Boolean = false
 )

app/src/main/java/com/swoosh/microblog/ui/navigation/NavGraph.kt

@@ -20,6 +20,7 @@ object Routes {
     const val COMPOSER = "composer"
     const val DETAIL = "detail"
     const val SETTINGS = "settings"
+    const val ADD_ACCOUNT = "add_account"
 }
 
 @Composable
@@ -55,6 +56,9 @@ fun SwooshNavGraph(
                 onCompose = {
                     editPost = null
                     navController.navigate(Routes.COMPOSER)
+                },
+                onAddAccount = {
+                    navController.navigate(Routes.ADD_ACCOUNT)
                 }
             )
         }
@@ -91,7 +95,11 @@ fun SwooshNavGraph(
 
         composable(Routes.SETTINGS) {
             SettingsScreen(
-                onBack = { navController.popBackStack() },
+                onBack = {
+                    feedViewModel.refreshAccountsList()
+                    feedViewModel.refresh()
+                    navController.popBackStack()
+                },
                 onLogout = {
                     navController.navigate(Routes.SETUP) {
                         popUpTo(0) { inclusive = true }
@@ -99,5 +107,18 @@ fun SwooshNavGraph(
                 }
             )
         }
+
+        composable(Routes.ADD_ACCOUNT) {
+            SetupScreen(
+                onSetupComplete = {
+                    feedViewModel.refreshAccountsList()
+                    feedViewModel.refresh()
+                    navController.popBackStack()
+                },
+                onBack = {
+                    navController.popBackStack()
+                }
+            )
+        }
     }
 }

app/src/main/java/com/swoosh/microblog/ui/settings/SettingsScreen.kt

@@ -1,18 +1,16 @@
 package com.swoosh.microblog.ui.settings
 
 import androidx.compose.foundation.layout.*
-import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.text.input.KeyboardType
-import androidx.compose.ui.text.input.PasswordVisualTransformation
 import androidx.compose.ui.unit.dp
-import com.swoosh.microblog.data.CredentialsManager
+import com.swoosh.microblog.data.AccountManager
 import com.swoosh.microblog.data.api.ApiClient
+import com.swoosh.microblog.ui.feed.AccountAvatar
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -21,10 +19,8 @@ fun SettingsScreen(
     onLogout: () -> Unit
 ) {
     val context = LocalContext.current
-    val credentials = remember { CredentialsManager(context) }
-    var url by remember { mutableStateOf(credentials.ghostUrl ?: "") }
-    var apiKey by remember { mutableStateOf(credentials.adminApiKey ?: "") }
-    var saved by remember { mutableStateOf(false) }
+    val accountManager = remember { AccountManager(context) }
+    val activeAccount = remember { accountManager.getActiveAccount() }
 
     Scaffold(
         topBar = {
@@ -44,68 +40,93 @@ fun SettingsScreen(
                 .padding(padding)
                 .padding(24.dp)
         ) {
-            Text("Ghost Instance", style = MaterialTheme.typography.titleMedium)
-            Spacer(modifier = Modifier.height(16.dp))
-
-            OutlinedTextField(
-                value = url,
-                onValueChange = { url = it; saved = false },
-                label = { Text("Ghost URL") },
-                singleLine = true,
-                keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Uri),
-                modifier = Modifier.fillMaxWidth()
-            )
-
+            // Active account info
+            Text("Current Account", style = MaterialTheme.typography.titleMedium)
             Spacer(modifier = Modifier.height(12.dp))
 
-            OutlinedTextField(
-                value = apiKey,
-                onValueChange = { apiKey = it; saved = false },
-                label = { Text("Admin API Key") },
-                singleLine = true,
-                visualTransformation = PasswordVisualTransformation(),
-                modifier = Modifier.fillMaxWidth()
-            )
-
-            Spacer(modifier = Modifier.height(16.dp))
-
-            Button(
-                onClick = {
-                    credentials.ghostUrl = url
-                    credentials.adminApiKey = apiKey
-                    ApiClient.reset()
-                    saved = true
-                },
+            if (activeAccount != null) {
+                Card(
                     modifier = Modifier.fillMaxWidth()
                 ) {
-                Text("Save Changes")
-            }
-
-            if (saved) {
-                Spacer(modifier = Modifier.height(8.dp))
+                    Row(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(16.dp),
+                        horizontalArrangement = Arrangement.spacedBy(12.dp)
+                    ) {
+                        AccountAvatar(account = activeAccount, size = 40)
+                        Column {
                             Text(
-                    "Settings saved",
-                    color = MaterialTheme.colorScheme.primary,
-                    style = MaterialTheme.typography.bodySmall
+                                text = activeAccount.name,
+                                style = MaterialTheme.typography.bodyLarge
+                            )
+                            Text(
+                                text = activeAccount.blogUrl
+                                    .removePrefix("https://")
+                                    .removePrefix("http://")
+                                    .removeSuffix("/"),
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant
                             )
                         }
+                    }
+                }
+            }
 
-            Spacer(modifier = Modifier.height(32.dp))
-            Divider()
+            Spacer(modifier = Modifier.height(24.dp))
+
+            // Account count info
+            val accountCount = accountManager.getAccounts().size
+            Text(
+                text = "$accountCount of ${AccountManager.MAX_ACCOUNTS} accounts",
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+
+            Spacer(modifier = Modifier.height(24.dp))
+            HorizontalDivider()
             Spacer(modifier = Modifier.height(16.dp))
 
+            // Disconnect current account
             OutlinedButton(
                 onClick = {
-                    credentials.clear()
+                    activeAccount?.let { account ->
+                        accountManager.removeAccount(account.id)
                         ApiClient.reset()
+                        val remaining = accountManager.getAccounts()
+                        if (remaining.isEmpty()) {
                             onLogout()
+                        } else {
+                            // There are still accounts, go back to feed with the next one
+                            onBack()
+                        }
+                    }
                 },
                 modifier = Modifier.fillMaxWidth(),
                 colors = ButtonDefaults.outlinedButtonColors(
                     contentColor = MaterialTheme.colorScheme.error
                 )
             ) {
-                Text("Disconnect & Reset")
+                Text("Disconnect Current Account")
+            }
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            // Disconnect all
+            if (accountManager.getAccounts().size > 1) {
+                TextButton(
+                    onClick = {
+                        accountManager.clearAll()
+                        ApiClient.reset()
+                        onLogout()
+                    },
+                    modifier = Modifier.fillMaxWidth(),
+                    colors = ButtonDefaults.textButtonColors(
+                        contentColor = MaterialTheme.colorScheme.error
+                    )
+                ) {
+                    Text("Disconnect All Accounts")
+                }
             }
         }
     }

app/src/main/java/com/swoosh/microblog/ui/setup/SetupScreen.kt

@@ -14,6 +14,7 @@ import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.outlined.Info
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
@@ -38,6 +39,7 @@ import androidx.lifecycle.viewmodel.compose.viewModel
 @Composable
 fun SetupScreen(
     onSetupComplete: () -> Unit,
+    onBack: (() -> Unit)? = null,
     viewModel: SetupViewModel = viewModel()
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
@@ -72,7 +74,20 @@ fun SetupScreen(
         "$withScheme/ghost/#/settings/integrations"
     }
 
-    Scaffold { padding ->
+    Scaffold(
+        topBar = {
+            if (state.isAddingAccount && onBack != null) {
+                TopAppBar(
+                    title = { Text("Add Account") },
+                    navigationIcon = {
+                        IconButton(onClick = onBack) {
+                            Icon(Icons.AutoMirrored.Filled.ArrowBack, "Back")
+                        }
+                    }
+                )
+            }
+        }
+    ) { padding ->
         Box(
             modifier = Modifier
                 .fillMaxSize()
@@ -100,7 +115,7 @@ fun SetupScreen(
                 ) {
                     Column(horizontalAlignment = Alignment.CenterHorizontally) {
                         Text(
-                            text = "Swoosh",
+                            text = if (state.isAddingAccount) "Add Account" else "Swoosh",
                             style = MaterialTheme.typography.headlineLarge,
                             color = MaterialTheme.colorScheme.primary
                         )
@@ -108,7 +123,8 @@ fun SetupScreen(
                         Spacer(modifier = Modifier.height(8.dp))
 
                         Text(
-                            text = "Connect to your Ghost instance",
+                            text = if (state.isAddingAccount) "Connect another Ghost instance"
+                                   else "Connect to your Ghost instance",
                             style = MaterialTheme.typography.bodyLarge,
                             color = MaterialTheme.colorScheme.onSurfaceVariant
                         )
@@ -123,6 +139,18 @@ fun SetupScreen(
                         .padding(bottom = 32.dp),
                     horizontalAlignment = Alignment.CenterHorizontally
                 ) {
+                // Account name field
+                OutlinedTextField(
+                    value = state.accountName,
+                    onValueChange = viewModel::updateAccountName,
+                    label = { Text("Account Name (optional)") },
+                    placeholder = { Text("e.g., Personal Blog") },
+                    singleLine = true,
+                    modifier = Modifier.fillMaxWidth()
+                )
+
+                Spacer(modifier = Modifier.height(12.dp))
+
                 OutlinedTextField(
                     value = state.url,
                     onValueChange = viewModel::updateUrl,
@@ -219,7 +247,7 @@ fun SetupScreen(
                         Spacer(modifier = Modifier.width(8.dp))
                         Text("Testing connection...")
                     } else {
-                        Text("Connect")
+                        Text(if (state.isAddingAccount) "Add Account" else "Connect")
                     }
                 }
             }
@@ -288,7 +316,7 @@ private fun PulsingCirclesBackground(
         val w = size.width
         val h = size.height
 
-        // Circle 1 — primary, upper-left
+        // Circle 1 -- primary, upper-left
         val radius1 = w * 0.50f * scale1
         drawCircle(
             brush = Brush.radialGradient(
@@ -300,7 +328,7 @@ private fun PulsingCirclesBackground(
             center = Offset(w * 0.3f, h * 0.35f)
         )
 
-        // Circle 2 — tertiary, right
+        // Circle 2 -- tertiary, right
         val radius2 = w * 0.55f * scale2
         drawCircle(
             brush = Brush.radialGradient(
@@ -312,7 +340,7 @@ private fun PulsingCirclesBackground(
             center = Offset(w * 0.75f, h * 0.45f)
         )
 
-        // Circle 3 — secondary, bottom-center
+        // Circle 3 -- secondary, bottom-center
         val radius3 = w * 0.45f * scale3
         drawCircle(
             brush = Brush.radialGradient(

app/src/main/java/com/swoosh/microblog/ui/setup/SetupViewModel.kt

@@ -3,7 +3,7 @@ package com.swoosh.microblog.ui.setup
 import android.app.Application
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.viewModelScope
-import com.swoosh.microblog.data.CredentialsManager
+import com.swoosh.microblog.data.AccountManager
 import com.swoosh.microblog.data.api.ApiClient
 import com.swoosh.microblog.data.api.GhostJwtGenerator
 import com.swoosh.microblog.data.repository.PostRepository
@@ -15,11 +15,10 @@ import kotlinx.coroutines.launch
 
 class SetupViewModel(application: Application) : AndroidViewModel(application) {
 
-    private val credentials = CredentialsManager(application)
+    private val accountManager = AccountManager(application)
 
     private val _uiState = MutableStateFlow(SetupUiState(
-        url = credentials.ghostUrl ?: "",
-        apiKey = credentials.adminApiKey ?: ""
+        isAddingAccount = accountManager.hasAnyAccount
     ))
     val uiState: StateFlow<SetupUiState> = _uiState.asStateFlow()
 
@@ -31,6 +30,10 @@ class SetupViewModel(application: Application) : AndroidViewModel(application) {
         _uiState.update { it.copy(apiKey = key) }
     }
 
+    fun updateAccountName(name: String) {
+        _uiState.update { it.copy(accountName = name) }
+    }
+
     fun save() {
         val state = _uiState.value
         if (state.url.isBlank() || state.apiKey.isBlank()) {
@@ -48,22 +51,39 @@ class SetupViewModel(application: Application) : AndroidViewModel(application) {
         viewModelScope.launch {
             _uiState.update { it.copy(isTesting = true, error = null) }
 
-            // Test connection
             try {
+                // Validate the API key can generate a JWT
                 GhostJwtGenerator.generateToken(state.apiKey)
-                credentials.ghostUrl = state.url
-                credentials.adminApiKey = state.apiKey
+
+                // Add account
+                val result = accountManager.addAccount(
+                    name = state.accountName,
+                    blogUrl = state.url,
+                    apiKey = state.apiKey
+                )
+
+                result.fold(
+                    onSuccess = { account ->
+                        // Reset ApiClient to pick up new account
                         ApiClient.reset()
 
+                        // Test connection
                         val repo = PostRepository(getApplication())
                         repo.fetchPosts(page = 1, limit = 1).fold(
                             onSuccess = {
                                 _uiState.update { it.copy(isTesting = false, isSuccess = true) }
                             },
                             onFailure = { e ->
+                                // Remove the account since connection failed
+                                accountManager.removeAccount(account.id)
                                 _uiState.update { it.copy(isTesting = false, error = "Connection failed: ${e.message}") }
                             }
                         )
+                    },
+                    onFailure = { e ->
+                        _uiState.update { it.copy(isTesting = false, error = e.message) }
+                    }
+                )
             } catch (e: Exception) {
                 _uiState.update { it.copy(isTesting = false, error = "Invalid API key: ${e.message}") }
             }
@@ -74,7 +94,9 @@ class SetupViewModel(application: Application) : AndroidViewModel(application) {
 data class SetupUiState(
     val url: String = "",
     val apiKey: String = "",
+    val accountName: String = "",
     val isTesting: Boolean = false,
     val isSuccess: Boolean = false,
+    val isAddingAccount: Boolean = false,
     val error: String? = null
 )

app/src/test/java/com/swoosh/microblog/data/AccountManagerTest.kt

@@ -0,0 +1,450 @@
+package com.swoosh.microblog.data
+
+import android.content.Context
+import android.content.SharedPreferences
+import com.swoosh.microblog.data.model.GhostAccount
+import org.junit.Assert.*
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.RuntimeEnvironment
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [28], application = android.app.Application::class)
+class AccountManagerTest {
+
+    private lateinit var prefs: SharedPreferences
+    private lateinit var accountManager: AccountManager
+
+    @Before
+    fun setUp() {
+        val context = RuntimeEnvironment.getApplication()
+        prefs = context.getSharedPreferences("test_prefs", Context.MODE_PRIVATE)
+        prefs.edit().clear().apply()
+        accountManager = AccountManager(prefs)
+    }
+
+    // --- CRUD: Add Account ---
+
+    @Test
+    fun `addAccount creates account with correct fields`() {
+        val result = accountManager.addAccount("Personal Blog", "https://blog.example.com", "key_id:secret")
+        assertTrue(result.isSuccess)
+        val account = result.getOrNull()!!
+        assertEquals("Personal Blog", account.name)
+        assertEquals("https://blog.example.com", account.blogUrl)
+        assertEquals("key_id:secret", account.apiKey)
+        assertTrue(account.id.isNotBlank())
+    }
+
+    @Test
+    fun `addAccount sets new account as active`() {
+        accountManager.addAccount("Blog 1", "https://blog1.com", "key1:secret1")
+        val active = accountManager.getActiveAccount()
+        assertNotNull(active)
+        assertEquals("Blog 1", active!!.name)
+    }
+
+    @Test
+    fun `addAccount with empty name uses extracted blog name`() {
+        val result = accountManager.addAccount("", "https://myblog.ghost.io", "key:secret")
+        assertTrue(result.isSuccess)
+        assertEquals("Myblog", result.getOrNull()!!.name)
+    }
+
+    @Test
+    fun `addAccount assigns unique color indices`() {
+        accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+        accountManager.addAccount("Blog 3", "https://blog3.com", "key3:s3")
+
+        val accounts = accountManager.getAccounts()
+        val colors = accounts.map { it.colorIndex }.toSet()
+        assertEquals("Each account should have a unique color", 3, colors.size)
+    }
+
+    @Test
+    fun `addAccount generates unique ids`() {
+        accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+
+        val accounts = accountManager.getAccounts()
+        val ids = accounts.map { it.id }.toSet()
+        assertEquals(2, ids.size)
+    }
+
+    // --- CRUD: Get Accounts ---
+
+    @Test
+    fun `getAccounts returns empty list initially`() {
+        assertEquals(emptyList<GhostAccount>(), accountManager.getAccounts())
+    }
+
+    @Test
+    fun `getAccounts returns all added accounts`() {
+        accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+
+        val accounts = accountManager.getAccounts()
+        assertEquals(2, accounts.size)
+    }
+
+    @Test
+    fun `getAccounts marks active account correctly`() {
+        accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        val result2 = accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+
+        val accounts = accountManager.getAccounts()
+        val activeAccount = accounts.find { it.isActive }
+        assertNotNull(activeAccount)
+        assertEquals(result2.getOrNull()!!.id, activeAccount!!.id)
+    }
+
+    // --- CRUD: Get Active Account ---
+
+    @Test
+    fun `getActiveAccount returns null when no accounts`() {
+        assertNull(accountManager.getActiveAccount())
+    }
+
+    @Test
+    fun `getActiveAccount returns the set active account`() {
+        val result1 = accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+
+        accountManager.setActiveAccount(result1.getOrNull()!!.id)
+        val active = accountManager.getActiveAccount()
+        assertEquals("Blog 1", active!!.name)
+    }
+
+    // --- CRUD: Set Active Account ---
+
+    @Test
+    fun `setActiveAccount returns true for valid id`() {
+        val result = accountManager.addAccount("Blog", "https://blog.com", "key:s")
+        assertTrue(accountManager.setActiveAccount(result.getOrNull()!!.id))
+    }
+
+    @Test
+    fun `setActiveAccount returns false for invalid id`() {
+        assertFalse(accountManager.setActiveAccount("nonexistent-id"))
+    }
+
+    @Test
+    fun `setActiveAccount switches active account`() {
+        val result1 = accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+
+        accountManager.setActiveAccount(result1.getOrNull()!!.id)
+        val active = accountManager.getActiveAccount()
+        assertEquals(result1.getOrNull()!!.id, active!!.id)
+    }
+
+    // --- CRUD: Remove Account ---
+
+    @Test
+    fun `removeAccount removes the specified account`() {
+        val result = accountManager.addAccount("Blog", "https://blog.com", "key:s")
+        assertTrue(accountManager.removeAccount(result.getOrNull()!!.id))
+        assertEquals(0, accountManager.getAccounts().size)
+    }
+
+    @Test
+    fun `removeAccount returns false for nonexistent id`() {
+        assertFalse(accountManager.removeAccount("nonexistent"))
+    }
+
+    @Test
+    fun `removeAccount switches active to next account when removing active`() {
+        val result1 = accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        val result2 = accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+        // Blog 2 is now active (most recently added)
+
+        accountManager.removeAccount(result2.getOrNull()!!.id)
+        val active = accountManager.getActiveAccount()
+        assertNotNull(active)
+        assertEquals(result1.getOrNull()!!.id, active!!.id)
+    }
+
+    @Test
+    fun `removeAccount clears active when last account removed`() {
+        val result = accountManager.addAccount("Blog", "https://blog.com", "key:s")
+        accountManager.removeAccount(result.getOrNull()!!.id)
+        assertNull(accountManager.getActiveAccount())
+    }
+
+    @Test
+    fun `removeAccount does not change active when removing non-active`() {
+        val result1 = accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        val result2 = accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+        // Blog 2 is active
+
+        accountManager.removeAccount(result1.getOrNull()!!.id)
+        val active = accountManager.getActiveAccount()
+        assertEquals(result2.getOrNull()!!.id, active!!.id)
+    }
+
+    // --- CRUD: Update Account ---
+
+    @Test
+    fun `updateAccount updates name`() {
+        val result = accountManager.addAccount("Old Name", "https://blog.com", "key:s")
+        assertTrue(accountManager.updateAccount(result.getOrNull()!!.id, name = "New Name"))
+        val updated = accountManager.getAccounts().find { it.id == result.getOrNull()!!.id }
+        assertEquals("New Name", updated!!.name)
+    }
+
+    @Test
+    fun `updateAccount updates blogUrl`() {
+        val result = accountManager.addAccount("Blog", "https://old.com", "key:s")
+        assertTrue(accountManager.updateAccount(result.getOrNull()!!.id, blogUrl = "https://new.com"))
+        val updated = accountManager.getAccounts().find { it.id == result.getOrNull()!!.id }
+        assertEquals("https://new.com", updated!!.blogUrl)
+    }
+
+    @Test
+    fun `updateAccount updates apiKey`() {
+        val result = accountManager.addAccount("Blog", "https://blog.com", "old_key:secret")
+        assertTrue(accountManager.updateAccount(result.getOrNull()!!.id, apiKey = "new_key:secret"))
+        val updated = accountManager.getAccounts().find { it.id == result.getOrNull()!!.id }
+        assertEquals("new_key:secret", updated!!.apiKey)
+    }
+
+    @Test
+    fun `updateAccount returns false for nonexistent id`() {
+        assertFalse(accountManager.updateAccount("nonexistent", name = "Name"))
+    }
+
+    @Test
+    fun `updateAccount preserves unchanged fields`() {
+        val result = accountManager.addAccount("Blog", "https://blog.com", "key:s")
+        accountManager.updateAccount(result.getOrNull()!!.id, name = "New Name")
+        val updated = accountManager.getAccounts().find { it.id == result.getOrNull()!!.id }
+        assertEquals("https://blog.com", updated!!.blogUrl)
+        assertEquals("key:s", updated.apiKey)
+    }
+
+    // --- Max Accounts Limit ---
+
+    @Test
+    fun `addAccount fails when max accounts reached`() {
+        for (i in 1..5) {
+            val r = accountManager.addAccount("Blog $i", "https://blog$i.com", "key$i:s$i")
+            assertTrue("Account $i should be added successfully", r.isSuccess)
+        }
+
+        val result = accountManager.addAccount("Blog 6", "https://blog6.com", "key6:s6")
+        assertTrue(result.isFailure)
+        assertTrue(result.exceptionOrNull()!!.message!!.contains("Maximum"))
+    }
+
+    @Test
+    fun `max accounts is 5`() {
+        assertEquals(5, AccountManager.MAX_ACCOUNTS)
+    }
+
+    @Test
+    fun `can add account after removing one at max`() {
+        val accountIds = mutableListOf<String>()
+        for (i in 1..5) {
+            val r = accountManager.addAccount("Blog $i", "https://blog$i.com", "key$i:s$i")
+            accountIds.add(r.getOrNull()!!.id)
+        }
+
+        accountManager.removeAccount(accountIds[0])
+        val result = accountManager.addAccount("Blog 6", "https://blog6.com", "key6:s6")
+        assertTrue(result.isSuccess)
+    }
+
+    // --- Migration ---
+
+    @Test
+    fun `migration from single account creates account entry`() {
+        // Simulate legacy state: write directly to prefs
+        prefs.edit()
+            .putString("ghost_url", "https://legacy.ghost.io")
+            .putString("admin_api_key", "legacy_key:legacy_secret")
+            .remove("multi_account_migration_done")
+            .apply()
+
+        // Create a new AccountManager to trigger migration
+        val freshManager = AccountManager(prefs)
+        val accounts = freshManager.getAccounts()
+
+        assertEquals(1, accounts.size)
+        val account = accounts[0]
+        assertEquals("https://legacy.ghost.io", account.blogUrl)
+        assertEquals("legacy_key:legacy_secret", account.apiKey)
+        assertTrue(account.isActive)
+    }
+
+    @Test
+    fun `migration removes legacy keys`() {
+        prefs.edit()
+            .putString("ghost_url", "https://legacy.ghost.io")
+            .putString("admin_api_key", "legacy_key:legacy_secret")
+            .remove("multi_account_migration_done")
+            .apply()
+
+        AccountManager(prefs)
+        // Legacy keys should be removed
+        assertNull(prefs.getString("ghost_url", null))
+        assertNull(prefs.getString("admin_api_key", null))
+    }
+
+    @Test
+    fun `migration only runs once`() {
+        prefs.edit()
+            .putString("ghost_url", "https://legacy.ghost.io")
+            .putString("admin_api_key", "legacy_key:legacy_secret")
+            .remove("multi_account_migration_done")
+            .apply()
+
+        val manager1 = AccountManager(prefs)
+        assertEquals(1, manager1.getAccounts().size)
+
+        // Second instantiation should not duplicate
+        val manager2 = AccountManager(prefs)
+        assertEquals(1, manager2.getAccounts().size)
+    }
+
+    @Test
+    fun `migration does nothing when no legacy credentials`() {
+        prefs.edit()
+            .remove("ghost_url")
+            .remove("admin_api_key")
+            .remove("multi_account_migration_done")
+            .apply()
+
+        val freshManager = AccountManager(prefs)
+        assertEquals(0, freshManager.getAccounts().size)
+    }
+
+    @Test
+    fun `migration extracts blog name from legacy url`() {
+        prefs.edit()
+            .putString("ghost_url", "https://myblog.ghost.io")
+            .putString("admin_api_key", "key:secret")
+            .remove("multi_account_migration_done")
+            .apply()
+
+        val freshManager = AccountManager(prefs)
+        val account = freshManager.getAccounts().first()
+        assertEquals("Myblog", account.name)
+    }
+
+    // --- isConfigured ---
+
+    @Test
+    fun `isConfigured returns false when no accounts`() {
+        assertFalse(accountManager.isConfigured)
+    }
+
+    @Test
+    fun `isConfigured returns true when active account exists`() {
+        accountManager.addAccount("Blog", "https://blog.com", "key:s")
+        assertTrue(accountManager.isConfigured)
+    }
+
+    // --- hasAnyAccount ---
+
+    @Test
+    fun `hasAnyAccount returns false when no accounts`() {
+        assertFalse(accountManager.hasAnyAccount)
+    }
+
+    @Test
+    fun `hasAnyAccount returns true when accounts exist`() {
+        accountManager.addAccount("Blog", "https://blog.com", "key:s")
+        assertTrue(accountManager.hasAnyAccount)
+    }
+
+    // --- clearAll ---
+
+    @Test
+    fun `clearAll removes all accounts`() {
+        accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+
+        accountManager.clearAll()
+
+        assertEquals(0, accountManager.getAccounts().size)
+        assertNull(accountManager.getActiveAccount())
+        assertFalse(accountManager.isConfigured)
+    }
+
+    // --- extractBlogName ---
+
+    @Test
+    fun `extractBlogName removes ghost io suffix`() {
+        assertEquals("Myblog", accountManager.extractBlogName("https://myblog.ghost.io"))
+    }
+
+    @Test
+    fun `extractBlogName removes com suffix`() {
+        assertEquals("Myblog", accountManager.extractBlogName("https://myblog.com"))
+    }
+
+    @Test
+    fun `extractBlogName handles URL without scheme`() {
+        assertEquals("Myblog", accountManager.extractBlogName("myblog.ghost.io"))
+    }
+
+    @Test
+    fun `extractBlogName capitalizes first letter`() {
+        assertEquals("Myblog", accountManager.extractBlogName("myblog.ghost.io"))
+    }
+
+    @Test
+    fun `extractBlogName handles trailing slash`() {
+        assertEquals("Myblog", accountManager.extractBlogName("https://myblog.ghost.io/"))
+    }
+
+    @Test
+    fun `extractBlogName handles URL with path`() {
+        assertEquals("Myblog", accountManager.extractBlogName("https://myblog.ghost.io/blog"))
+    }
+
+    // --- Account switching ---
+
+    @Test
+    fun `switching active account changes getActiveAccount result`() {
+        val r1 = accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        val r2 = accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+
+        // Blog 2 is now active
+        assertEquals("Blog 2", accountManager.getActiveAccount()!!.name)
+
+        // Switch to Blog 1
+        accountManager.setActiveAccount(r1.getOrNull()!!.id)
+        assertEquals("Blog 1", accountManager.getActiveAccount()!!.name)
+
+        // Switch back to Blog 2
+        accountManager.setActiveAccount(r2.getOrNull()!!.id)
+        assertEquals("Blog 2", accountManager.getActiveAccount()!!.name)
+    }
+
+    @Test
+    fun `only one account is marked active at a time`() {
+        accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+        accountManager.addAccount("Blog 3", "https://blog3.com", "key3:s3")
+
+        val accounts = accountManager.getAccounts()
+        val activeCount = accounts.count { it.isActive }
+        assertEquals(1, activeCount)
+    }
+
+    @Test
+    fun `persisted data survives new AccountManager instance`() {
+        accountManager.addAccount("Blog 1", "https://blog1.com", "key1:s1")
+        accountManager.addAccount("Blog 2", "https://blog2.com", "key2:s2")
+
+        // Create a new instance sharing the same prefs
+        val newManager = AccountManager(prefs)
+        assertEquals(2, newManager.getAccounts().size)
+        assertEquals("Blog 2", newManager.getActiveAccount()!!.name)
+    }
+}

app/src/test/java/com/swoosh/microblog/data/db/LocalPostDaoTest.kt

@@ -0,0 +1,192 @@
+package com.swoosh.microblog.data.db
+
+import android.content.Context
+import androidx.room.Room
+import com.swoosh.microblog.data.model.LocalPost
+import com.swoosh.microblog.data.model.PostStatus
+import com.swoosh.microblog.data.model.QueueStatus
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.test.runTest
+import org.junit.After
+import org.junit.Assert.*
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.RuntimeEnvironment
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [28], application = android.app.Application::class)
+class LocalPostDaoTest {
+
+    private lateinit var database: AppDatabase
+    private lateinit var dao: LocalPostDao
+
+    @Before
+    fun setUp() {
+        val context: Context = RuntimeEnvironment.getApplication()
+        database = Room.inMemoryDatabaseBuilder(context, AppDatabase::class.java)
+            .allowMainThreadQueries()
+            .build()
+        dao = database.localPostDao()
+    }
+
+    @After
+    fun tearDown() {
+        database.close()
+    }
+
+    // --- Account-filtered queries ---
+
+    @Test
+    fun `getPostsByAccount returns only posts for specified account`() = runTest {
+        val post1 = LocalPost(
+            accountId = "account-1",
+            title = "Post for account 1",
+            content = "Content 1"
+        )
+        val post2 = LocalPost(
+            accountId = "account-2",
+            title = "Post for account 2",
+            content = "Content 2"
+        )
+        val post3 = LocalPost(
+            accountId = "account-1",
+            title = "Another post for account 1",
+            content = "Content 3"
+        )
+
+        dao.insertPost(post1)
+        dao.insertPost(post2)
+        dao.insertPost(post3)
+
+        val account1Posts = dao.getPostsByAccount("account-1").first()
+        assertEquals(2, account1Posts.size)
+        assertTrue(account1Posts.all { it.accountId == "account-1" })
+    }
+
+    @Test
+    fun `getPostsByAccount returns empty list for account with no posts`() = runTest {
+        val post = LocalPost(
+            accountId = "account-1",
+            title = "Post",
+            content = "Content"
+        )
+        dao.insertPost(post)
+
+        val posts = dao.getPostsByAccount("account-2").first()
+        assertEquals(0, posts.size)
+    }
+
+    @Test
+    fun `getAllPosts returns posts from all accounts`() = runTest {
+        dao.insertPost(LocalPost(accountId = "account-1", title = "P1", content = "C1"))
+        dao.insertPost(LocalPost(accountId = "account-2", title = "P2", content = "C2"))
+
+        val allPosts = dao.getAllPosts().first()
+        assertEquals(2, allPosts.size)
+    }
+
+    @Test
+    fun `getQueuedPostsByAccount returns only queued posts for account`() = runTest {
+        dao.insertPost(
+            LocalPost(
+                accountId = "account-1",
+                title = "Queued 1",
+                content = "C1",
+                queueStatus = QueueStatus.QUEUED_PUBLISH
+            )
+        )
+        dao.insertPost(
+            LocalPost(
+                accountId = "account-2",
+                title = "Queued 2",
+                content = "C2",
+                queueStatus = QueueStatus.QUEUED_PUBLISH
+            )
+        )
+        dao.insertPost(
+            LocalPost(
+                accountId = "account-1",
+                title = "Not queued",
+                content = "C3",
+                queueStatus = QueueStatus.NONE
+            )
+        )
+
+        val queued = dao.getQueuedPostsByAccount("account-1")
+        assertEquals(1, queued.size)
+        assertEquals("Queued 1", queued[0].title)
+    }
+
+    @Test
+    fun `getQueuedPosts returns queued posts from all accounts`() = runTest {
+        dao.insertPost(
+            LocalPost(
+                accountId = "account-1",
+                title = "Q1",
+                content = "C1",
+                queueStatus = QueueStatus.QUEUED_PUBLISH
+            )
+        )
+        dao.insertPost(
+            LocalPost(
+                accountId = "account-2",
+                title = "Q2",
+                content = "C2",
+                queueStatus = QueueStatus.QUEUED_SCHEDULED
+            )
+        )
+
+        val queued = dao.getQueuedPosts()
+        assertEquals(2, queued.size)
+    }
+
+    // --- accountId field on LocalPost ---
+
+    @Test
+    fun `LocalPost stores and retrieves accountId`() = runTest {
+        val id = dao.insertPost(
+            LocalPost(
+                accountId = "test-account-id",
+                title = "Test",
+                content = "Content"
+            )
+        )
+
+        val retrieved = dao.getPostById(id)
+        assertNotNull(retrieved)
+        assertEquals("test-account-id", retrieved!!.accountId)
+    }
+
+    @Test
+    fun `LocalPost has empty string as default accountId`() {
+        val post = LocalPost(title = "Test", content = "Content")
+        assertEquals("", post.accountId)
+    }
+
+    @Test
+    fun `getPostsByAccount orders by updatedAt descending`() = runTest {
+        dao.insertPost(
+            LocalPost(
+                accountId = "account-1",
+                title = "Older",
+                content = "C1",
+                updatedAt = 1000L
+            )
+        )
+        dao.insertPost(
+            LocalPost(
+                accountId = "account-1",
+                title = "Newer",
+                content = "C2",
+                updatedAt = 2000L
+            )
+        )
+
+        val posts = dao.getPostsByAccount("account-1").first()
+        assertEquals("Newer", posts[0].title)
+        assertEquals("Older", posts[1].title)
+    }
+}

app/src/test/java/com/swoosh/microblog/data/model/GhostAccountTest.kt

@@ -0,0 +1,74 @@
+package com.swoosh.microblog.data.model
+
+import org.junit.Assert.*
+import org.junit.Test
+
+class GhostAccountTest {
+
+    @Test
+    fun `GhostAccount has correct default values`() {
+        val account = GhostAccount(
+            id = "test-id",
+            name = "Test Blog",
+            blogUrl = "https://test.ghost.io",
+            apiKey = "key:secret"
+        )
+        assertFalse(account.isActive)
+        assertEquals(0, account.colorIndex)
+    }
+
+    @Test
+    fun `GhostAccount preserves all fields`() {
+        val account = GhostAccount(
+            id = "id-123",
+            name = "My Blog",
+            blogUrl = "https://myblog.com",
+            apiKey = "abc:def",
+            isActive = true,
+            colorIndex = 3
+        )
+        assertEquals("id-123", account.id)
+        assertEquals("My Blog", account.name)
+        assertEquals("https://myblog.com", account.blogUrl)
+        assertEquals("abc:def", account.apiKey)
+        assertTrue(account.isActive)
+        assertEquals(3, account.colorIndex)
+    }
+
+    @Test
+    fun `ACCOUNT_COLORS has 5 colors`() {
+        assertEquals(5, GhostAccount.ACCOUNT_COLORS.size)
+    }
+
+    @Test
+    fun `colorForIndex wraps around for large indices`() {
+        val color0 = GhostAccount.colorForIndex(0)
+        val color5 = GhostAccount.colorForIndex(5)
+        assertEquals(color0, color5)
+    }
+
+    @Test
+    fun `colorForIndex returns different colors for different indices`() {
+        val colors = (0 until 5).map { GhostAccount.colorForIndex(it) }.toSet()
+        assertEquals(5, colors.size)
+    }
+
+    @Test
+    fun `copy preserves fields correctly`() {
+        val original = GhostAccount(
+            id = "id",
+            name = "Name",
+            blogUrl = "https://blog.com",
+            apiKey = "key:secret",
+            isActive = true,
+            colorIndex = 2
+        )
+        val copy = original.copy(name = "New Name")
+        assertEquals("New Name", copy.name)
+        assertEquals("id", copy.id)
+        assertEquals("https://blog.com", copy.blogUrl)
+        assertEquals("key:secret", copy.apiKey)
+        assertTrue(copy.isActive)
+        assertEquals(2, copy.colorIndex)
+    }
+}