feat: Inter Variable font, theme picker wired end-to-end, settings i18n

Inter Variable (v4.1, 859 KB): full type scale with 9 weight axes
(W100–W900), negative tracking at display sizes, positive at labels.

Theme picker: SettingsViewModel now uses KaizenThemeId from the design
system (AMBER/BLAU/MONO/AURORA). MainActivity wires selectedTheme +
appearanceMode to KaizenTheme composable — switching themes in Settings
instantly propagates to the entire app.

No server sync needed — web stores theme in localStorage, app stores
locally. Backend /api/v1/me has no uiTheme field in the DB.

Settings strings migrated to string resources (de + en).
SettingsViewModelTest updated for new enum values + System default.

CLAUDE.md

@@ -71,7 +71,7 @@ Full spec: `DESIGN.md`. Branch: `feature/design-system-v2`.
 2. **Squircle shapes** — iOS-style superellipse with G2 continuity (`ui/shape/Squircle.kt`). Token system `KaizenShapes.{xs,sm,md,lg,xl,pill,circle}`. Replaces all `RoundedCornerShape`.
 3. **GlassSurface** — frosted-glass composable (gradient tint + specular border + inner highlight + multi-layer shadow). Android has no backdrop-filter; glass effect works via semi-transparent tint over the blob layer. Opacity tiers per component in `GlassTiers`.
 4. **Multi-layer shadows** — `ShadowStack` with 2–4 overlapping layers (`KaizenShadows.level0..4`). Dark mode multiplies alphas ×1.8. Replaces all `Modifier.shadow()`.
-5. **4-theme system** — Amber/Blau/Mono/Aurora. Each theme = `KaizenAccentScheme` (primary + 4 blob colors). Neutrals are theme-independent. `LocalKaizenAccent` CompositionLocal. Server sync planned via `GET /api/v1/me` → `uiTheme`.
+5. **4-theme system** — Amber/Blau/Mono/Aurora. Each theme = `KaizenAccentScheme` (primary + 4 blob colors). Neutrals are theme-independent. `LocalKaizenAccent` CompositionLocal. Theme selection wired end-to-end: `SettingsViewModel.selectedTheme` → `MainActivity` → `KaizenTheme(themeId=...)`. No server sync (web stores in localStorage, app stores locally). Appearance (Light/Dark/System) also wired end-to-end.
 6. **Sensor-reactive motion** — `rememberTiltState()` provides smoothed tilt `Offset(-1..1)`. Uses `TYPE_GAME_ROTATION_VECTOR` (fused, no drift). Auto-disables on battery saver, reduced motion, background, extreme tilt.
 
 **Motion tokens** (`ui/motion/Motion.kt`): `EaseSpring` (overshoot), `EaseSmooth` (expo-out), `EaseEmphasized` (M3), `SpringSnappy/Default/Gentle`. All durations centralised in `Durations` object.
@@ -80,6 +80,10 @@ Full spec: `DESIGN.md`. Branch: `feature/design-system-v2`.
 
 **KaizenOrb** (`chat/Background.kt`) uses `rememberTiltState()` from `ui/sensor/` instead of inline sensor code. Breath animation uses `Durations.ORB_BREATH` / `ORB_BREATH_STREAMING` from `ui/motion/`.
 
+**Typography** — Inter Variable (`res/font/inter_variable.ttf`, 859 KB, SIL OFL). Full type scale from DESIGN.md §8: `displayLarge` (32sp/W600) through `labelSmall` (11sp/W500). All 9 weight axes registered (W100–W900). Negative tracking at display sizes, positive at label sizes. `@OptIn(ExperimentalTextApi::class)` for `FontVariation.Settings`.
+
+**Oklab** (`ui/theme/Oklab.kt`) — Double-precision matrix math for accurate sRGB↔Oklab round-trips. Used by theme picker's Oklab gradient swatches and `generateGradientStops()`. Forward LMS matrix corrected to Björn Ottosson reference.
+
 ### Internationalization (i18n)
 
 - **de** (default), **en** — same as web (`messages/de.json`, `messages/en.json`).

app/src/main/java/dev/kaizen/app/MainActivity.kt

@@ -7,6 +7,7 @@ import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.SystemBarStyle
 import androidx.activity.compose.setContent
+import androidx.compose.runtime.collectAsState
 import androidx.activity.enableEdgeToEdge
 import dev.kaizen.app.auth.LoginScreen
 import dev.kaizen.app.chat.ChatScreen
@@ -14,6 +15,7 @@ import dev.kaizen.app.chat.ChatViewModel
 import dev.kaizen.app.net.SecureStore
 import dev.kaizen.app.net.SessionViewModel
 import dev.kaizen.app.settings.SettingsViewModel
+import dev.kaizen.app.settings.AppAppearance
 import dev.kaizen.app.ui.theme.KaizenTheme
 
 class MainActivity : ComponentActivity() {
@@ -39,7 +41,14 @@ class MainActivity : ComponentActivity() {
             navigationBarStyle = SystemBarStyle.auto(Color.TRANSPARENT, Color.TRANSPARENT),
         )
         setContent {
-            KaizenTheme {
+            val themeId = settingsViewModel.selectedTheme.collectAsState()
+            val appearance = settingsViewModel.appearanceMode.collectAsState()
+            val darkOverride = when (appearance.value) {
+                AppAppearance.Light -> false
+                AppAppearance.Dark -> true
+                AppAppearance.System -> androidx.compose.foundation.isSystemInDarkTheme()
+            }
+            KaizenTheme(themeId = themeId.value, darkTheme = darkOverride) {
                 // Snapshot-state routing: logging in/out flips session.config and
                 // recomposes this branch — no NavHost needed for two top-level states.
                 if (sessionViewModel.isLoggedIn) {

app/src/main/java/dev/kaizen/app/settings/SettingsComponents.kt

@@ -57,6 +57,7 @@ import androidx.compose.ui.unit.sp
 import dev.kaizen.app.ui.theme.Amber
 import dev.kaizen.app.ui.theme.AmberDeep
 import dev.kaizen.app.ui.theme.Oklab
+import dev.kaizen.app.ui.theme.themes.KaizenThemeId
 
 /** Converts polar OKLCH coordinates (Lightness, Chroma, Hue in degrees) to a standard Color */
 private fun oklch(l: Float, c: Float, h: Float, alpha: Float = 1.0f): Color {
@@ -201,17 +202,17 @@ fun ThemeOptionPill(
     val (colorStart, colorEnd) = remember(themeId, isDark) {
         if (isDark) {
             when (themeId) {
-                KaizenThemeId.Amber -> oklch(0.76f, 0.14f, 83f) to oklch(0.55f, 0.16f, 83f)
-                KaizenThemeId.Blue -> oklch(0.68f, 0.18f, 257f) to oklch(0.45f, 0.18f, 257f)
-                KaizenThemeId.Aurora -> oklch(0.78f, 0.15f, 85f) to oklch(0.45f, 0.18f, 320f)
-                KaizenThemeId.Mono -> oklch(0.92f, 0f, 255f) to oklch(0.35f, 0f, 255f)
+                KaizenThemeId.AMBER -> oklch(0.76f, 0.14f, 83f) to oklch(0.55f, 0.16f, 83f)
+                KaizenThemeId.BLAU -> oklch(0.68f, 0.18f, 257f) to oklch(0.45f, 0.18f, 257f)
+                KaizenThemeId.AURORA -> oklch(0.78f, 0.15f, 85f) to oklch(0.45f, 0.18f, 320f)
+                KaizenThemeId.MONO -> oklch(0.92f, 0f, 255f) to oklch(0.35f, 0f, 255f)
             }
         } else {
             when (themeId) {
-                KaizenThemeId.Amber -> oklch(0.72f, 0.14f, 83f) to oklch(0.85f, 0.15f, 83f)
-                KaizenThemeId.Blue -> oklch(0.62f, 0.19f, 257f) to oklch(0.78f, 0.15f, 257f)
-                KaizenThemeId.Aurora -> oklch(0.62f, 0.20f, 320f) to oklch(0.75f, 0.16f, 320f)
-                KaizenThemeId.Mono -> oklch(0.22f, 0f, 255f) to oklch(0.85f, 0f, 255f)
+                KaizenThemeId.AMBER -> oklch(0.72f, 0.14f, 83f) to oklch(0.85f, 0.15f, 83f)
+                KaizenThemeId.BLAU -> oklch(0.62f, 0.19f, 257f) to oklch(0.78f, 0.15f, 257f)
+                KaizenThemeId.AURORA -> oklch(0.62f, 0.20f, 320f) to oklch(0.75f, 0.16f, 320f)
+                KaizenThemeId.MONO -> oklch(0.22f, 0f, 255f) to oklch(0.85f, 0f, 255f)
             }
         }
     }
@@ -251,7 +252,7 @@ fun ThemeOptionPill(
                 Icon(
                     imageVector = Icons.Rounded.Check,
                     contentDescription = null,
-                    tint = if (themeId == KaizenThemeId.Mono && isDark.not()) Color.White else Color.Black,
+                    tint = if (themeId == KaizenThemeId.MONO && isDark.not()) Color.White else Color.Black,
                     modifier = Modifier.size(16.dp)
                 )
             }

app/src/main/java/dev/kaizen/app/settings/SettingsScreen.kt

@@ -38,6 +38,9 @@ import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.res.stringResource
+import dev.kaizen.app.R
+import dev.kaizen.app.ui.theme.themes.KaizenThemeId
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
@@ -94,119 +97,48 @@ fun SettingsScreen(
                 
                 Spacer(Modifier.width(16.dp))
                 
-                Text(
-                    text = "Einstellungen",
-                    color = cs.onBackground,
-                    fontSize = 24.sp,
-                    fontWeight = FontWeight.Bold
-                )
+                Text(stringResource(R.string.settings_title), color = cs.onBackground, fontSize = 24.sp, fontWeight = FontWeight.Bold)
             }
 
-            // --- SEKTION 1: Erscheinungsbild (Theme & Appearance) ---
-            Text(
-                text = "ERSCHEINUNGSBILD",
-                color = cs.onSurfaceVariant.copy(alpha = 0.6f),
-                fontSize = 12.sp,
-                fontWeight = FontWeight.Bold,
-                modifier = Modifier.padding(start = 8.dp, bottom = 8.dp)
-            )
+            Text(stringResource(R.string.settings_section_appearance), color = cs.onSurfaceVariant.copy(alpha = 0.6f), fontSize = 12.sp, fontWeight = FontWeight.Bold, modifier = Modifier.padding(start = 8.dp, bottom = 8.dp))
 
             SettingsCard(modifier = Modifier.padding(bottom = 24.dp)) {
-                // Theme Picker Row (Oklab perception space stops)
-                SettingsOptionRow(
-                    title = "Akzentfarbe",
-                    description = "Wähle das Farbschema der App (Oklab perzeptiv)",
-                    icon = Icons.Rounded.Palette
-                ) {
-                    Row(
-                        horizontalArrangement = Arrangement.spacedBy(10.dp),
-                        verticalAlignment = Alignment.CenterVertically
-                    ) {
-                        KaizenThemeId.values().forEach { theme ->
-                            ThemeOptionPill(
-                                themeId = theme,
-                                selected = selectedTheme == theme,
-                                onClick = { viewModel.selectTheme(theme) }
-                            )
+                SettingsOptionRow(title = stringResource(R.string.settings_accent_title), description = stringResource(R.string.settings_accent_desc), icon = Icons.Rounded.Palette) {
+                    Row(horizontalArrangement = Arrangement.spacedBy(10.dp), verticalAlignment = Alignment.CenterVertically) {
+                        KaizenThemeId.entries.forEach { theme ->
+                            ThemeOptionPill(themeId = theme, selected = selectedTheme == theme, onClick = { viewModel.selectTheme(theme) })
                         }
                     }
                 }
-                
                 Spacer(Modifier.height(12.dp))
-                
-                // Light / Dark / System Appearance segmented toggle pills
-                SettingsOptionRow(
-                    title = "Helligkeitsmodus",
-                    description = "Passe das Hell/Dunkel-Erscheinungsbild an",
-                    icon = Icons.Rounded.Settings
-                ) {
-                    Row(
-                        horizontalArrangement = Arrangement.spacedBy(6.dp),
-                        verticalAlignment = Alignment.CenterVertically
-                    ) {
-                        AppAppearance.values().forEach { mode ->
+                SettingsOptionRow(title = stringResource(R.string.settings_appearance_title), description = stringResource(R.string.settings_appearance_desc), icon = Icons.Rounded.Settings) {
+                    Row(horizontalArrangement = Arrangement.spacedBy(6.dp), verticalAlignment = Alignment.CenterVertically) {
+                        AppAppearance.entries.forEach { mode ->
                             val label = when (mode) {
-                                AppAppearance.Light -> "Hell"
-                                AppAppearance.Dark -> "Dunkel"
-                                AppAppearance.System -> "System"
+                                AppAppearance.Light -> stringResource(R.string.settings_appearance_light)
+                                AppAppearance.Dark -> stringResource(R.string.settings_appearance_dark)
+                                AppAppearance.System -> stringResource(R.string.settings_appearance_system)
                             }
-                            AppearanceTogglePill(
-                                selected = appearanceMode == mode,
-                                label = label,
-                                onClick = { viewModel.selectAppearance(mode) }
-                            )
+                            AppearanceTogglePill(selected = appearanceMode == mode, label = label, onClick = { viewModel.selectAppearance(mode) })
                         }
                     }
                 }
             }
 
-            // --- SEKTION 2: Profil & Konto ---
-            Text(
-                text = "PROFIL & KONTO",
-                color = cs.onSurfaceVariant.copy(alpha = 0.6f),
-                fontSize = 12.sp,
-                fontWeight = FontWeight.Bold,
-                modifier = Modifier.padding(start = 8.dp, bottom = 8.dp)
-            )
+            Text(stringResource(R.string.settings_section_profile), color = cs.onSurfaceVariant.copy(alpha = 0.6f), fontSize = 12.sp, fontWeight = FontWeight.Bold, modifier = Modifier.padding(start = 8.dp, bottom = 8.dp))
 
             SettingsCard(modifier = Modifier.padding(bottom = 24.dp)) {
-                // Username editor row
-                SettingsOptionRow(
-                    title = "Benutzername",
-                    description = "Ändere deinen Anzeigenamen",
-                    icon = Icons.Rounded.Person
-                ) {
-                    SettingsInputCapsule(
-                        value = userName,
-                        onValueChange = { viewModel.updateUserName(it) }
-                    )
+                SettingsOptionRow(title = stringResource(R.string.settings_name_title), description = stringResource(R.string.settings_name_desc), icon = Icons.Rounded.Person) {
+                    SettingsInputCapsule(value = userName, onValueChange = { viewModel.updateUserName(it) })
                 }
-                
                 Spacer(Modifier.height(12.dp))
-                
-                // Email display row (read-only in this screen view)
-                SettingsOptionRow(
-                    title = "E-Mail-Adresse",
-                    description = userEmail,
-                    icon = Icons.Rounded.Settings
-                )
+                SettingsOptionRow(title = stringResource(R.string.settings_email_title), description = userEmail, icon = Icons.Rounded.Settings)
             }
 
-            // --- SEKTION 3: KI-Profil & Kontext ---
-            Text(
-                text = "KI-PROFIL & KONTEXT",
-                color = cs.onSurfaceVariant.copy(alpha = 0.6f),
-                fontSize = 12.sp,
-                fontWeight = FontWeight.Bold,
-                modifier = Modifier.padding(start = 8.dp, bottom = 8.dp)
-            )
+            Text(stringResource(R.string.settings_section_ai), color = cs.onSurfaceVariant.copy(alpha = 0.6f), fontSize = 12.sp, fontWeight = FontWeight.Bold, modifier = Modifier.padding(start = 8.dp, bottom = 8.dp))
 
             SettingsCard(modifier = Modifier.padding(bottom = 32.dp)) {
-                SettingsOptionRow(
-                    title = "System-Prompt & Fakten",
-                    description = "Aktive Regeln: 12, Pinned: 3, Verwendetes Budget: 412 / 1500 Tokens",
-                    icon = Icons.Rounded.AutoAwesome
-                )
+                SettingsOptionRow(title = stringResource(R.string.settings_ai_title), description = "", icon = Icons.Rounded.AutoAwesome)
             }
         }
     }

app/src/main/java/dev/kaizen/app/settings/SettingsViewModel.kt

@@ -1,67 +1,40 @@
 package dev.kaizen.app.settings
 
-import androidx.compose.runtime.State
-import androidx.compose.runtime.mutableStateOf
 import androidx.lifecycle.ViewModel
+import dev.kaizen.app.ui.theme.themes.KaizenThemeId
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 
-// Available Kaizen UI themes
-enum class KaizenThemeId { Amber, Blue, Aurora, Mono }
-
-// Available Light/Dark/System appearance modes
 enum class AppAppearance { Light, Dark, System }
 
-/**
- * Clean MVVM ViewModel for the Settings module.
- * 
- * Completely decoupled from Android UI classes, making it 100% unit-testable
- * on the JVM. Manages the state of the Oklab Theme Picker, selected model, 
- * and user profile options.
- */
 class SettingsViewModel : ViewModel() {
 
-    // 1. Reactive State Flow for Theme
-    private val _selectedTheme = MutableStateFlow(KaizenThemeId.Amber)
+    private val _selectedTheme = MutableStateFlow(KaizenThemeId.AMBER)
     val selectedTheme: StateFlow<KaizenThemeId> = _selectedTheme.asStateFlow()
 
-    // 2. Reactive State Flow for Appearance
-    private val _appearanceMode = MutableStateFlow(AppAppearance.Dark)
+    private val _appearanceMode = MutableStateFlow(AppAppearance.System)
     val appearanceMode: StateFlow<AppAppearance> = _appearanceMode.asStateFlow()
 
-    // 3. User profile details
     private val _userName = MutableStateFlow("Bruno")
     val userName: StateFlow<String> = _userName.asStateFlow()
 
-    private val _userEmail = MutableStateFlow("admin@kryptomrx.de")
+    private val _userEmail = MutableStateFlow("")
     val userEmail: StateFlow<String> = _userEmail.asStateFlow()
 
-    // 4. Default Chat Model
-    private val _defaultModel = MutableStateFlow("gemini-2.5-flash")
-    val defaultModel: StateFlow<String> = _defaultModel.asStateFlow()
-
-    /** Selects a new Kaizen UI theme and triggers an Oklab transition stops recalculation */
     fun selectTheme(themeId: KaizenThemeId) {
         _selectedTheme.value = themeId
     }
 
-    /** Changes the appearance mode (Light, Dark, or System Sync) */
     fun selectAppearance(mode: AppAppearance) {
         _appearanceMode.value = mode
     }
 
-    /** Updates the user's name in profile settings */
     fun updateUserName(name: String) {
-        if (name.isNotBlank()) {
-            _userName.value = name.trim()
-        }
+        if (name.isNotBlank()) _userName.value = name.trim()
     }
 
-    /** Updates the standard chat model */
-    fun updateDefaultModel(modelId: String) {
-        if (modelId.isNotBlank()) {
-            _defaultModel.value = modelId.trim()
-        }
+    fun updateUserEmail(email: String) {
+        _userEmail.value = email
     }
 }

app/src/main/java/dev/kaizen/app/ui/theme/Type.kt

@@ -2,33 +2,123 @@ package dev.kaizen.app.ui.theme
 
 import androidx.compose.material3.Typography
 import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontVariation
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.sp
+import dev.kaizen.app.R
+
+@OptIn(androidx.compose.ui.text.ExperimentalTextApi::class)
+val InterVariable = FontFamily(
+    Font(
+        R.font.inter_variable,
+        weight = FontWeight.W100,
+        variationSettings = FontVariation.Settings(FontVariation.weight(100)),
+    ),
+    Font(
+        R.font.inter_variable,
+        weight = FontWeight.W200,
+        variationSettings = FontVariation.Settings(FontVariation.weight(200)),
+    ),
+    Font(
+        R.font.inter_variable,
+        weight = FontWeight.W300,
+        variationSettings = FontVariation.Settings(FontVariation.weight(300)),
+    ),
+    Font(
+        R.font.inter_variable,
+        weight = FontWeight.W400,
+        variationSettings = FontVariation.Settings(FontVariation.weight(400)),
+    ),
+    Font(
+        R.font.inter_variable,
+        weight = FontWeight.W500,
+        variationSettings = FontVariation.Settings(FontVariation.weight(500)),
+    ),
+    Font(
+        R.font.inter_variable,
+        weight = FontWeight.W600,
+        variationSettings = FontVariation.Settings(FontVariation.weight(600)),
+    ),
+    Font(
+        R.font.inter_variable,
+        weight = FontWeight.W700,
+        variationSettings = FontVariation.Settings(FontVariation.weight(700)),
+    ),
+    Font(
+        R.font.inter_variable,
+        weight = FontWeight.W800,
+        variationSettings = FontVariation.Settings(FontVariation.weight(800)),
+    ),
+    Font(
+        R.font.inter_variable,
+        weight = FontWeight.W900,
+        variationSettings = FontVariation.Settings(FontVariation.weight(900)),
+    ),
+)
 
-// Set of Material typography styles to start with
 val Typography = Typography(
+    displayLarge = TextStyle(
+        fontFamily = InterVariable,
+        fontWeight = FontWeight.W600,
+        fontSize = 32.sp,
+        lineHeight = 38.sp,
+        letterSpacing = (-0.32).sp,
+    ),
+    displayMedium = TextStyle(
+        fontFamily = InterVariable,
+        fontWeight = FontWeight.W600,
+        fontSize = 24.sp,
+        lineHeight = 30.sp,
+        letterSpacing = (-0.12).sp,
+    ),
+    titleLarge = TextStyle(
+        fontFamily = InterVariable,
+        fontWeight = FontWeight.W600,
+        fontSize = 20.sp,
+        lineHeight = 26.sp,
+    ),
+    titleMedium = TextStyle(
+        fontFamily = InterVariable,
+        fontWeight = FontWeight.W500,
+        fontSize = 16.sp,
+        lineHeight = 22.sp,
+        letterSpacing = 0.05.sp,
+    ),
     bodyLarge = TextStyle(
-        fontFamily = FontFamily.Default,
-        fontWeight = FontWeight.Normal,
+        fontFamily = InterVariable,
+        fontWeight = FontWeight.W400,
         fontSize = 16.sp,
         lineHeight = 24.sp,
-        letterSpacing = 0.5.sp
-    )
-    /* Other default text styles to override
-    titleLarge = TextStyle(
-        fontFamily = FontFamily.Default,
-        fontWeight = FontWeight.Normal,
-        fontSize = 22.sp,
-        lineHeight = 28.sp,
-        letterSpacing = 0.sp
+        letterSpacing = 0.08.sp,
+    ),
+    bodyMedium = TextStyle(
+        fontFamily = InterVariable,
+        fontWeight = FontWeight.W400,
+        fontSize = 14.sp,
+        lineHeight = 20.sp,
+        letterSpacing = 0.11.sp,
+    ),
+    labelLarge = TextStyle(
+        fontFamily = InterVariable,
+        fontWeight = FontWeight.W500,
+        fontSize = 14.sp,
+        lineHeight = 20.sp,
+        letterSpacing = 0.14.sp,
+    ),
+    labelMedium = TextStyle(
+        fontFamily = InterVariable,
+        fontWeight = FontWeight.W500,
+        fontSize = 12.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.24.sp,
     ),
     labelSmall = TextStyle(
-        fontFamily = FontFamily.Default,
-        fontWeight = FontWeight.Medium,
+        fontFamily = InterVariable,
+        fontWeight = FontWeight.W500,
         fontSize = 11.sp,
         lineHeight = 16.sp,
-        letterSpacing = 0.5.sp
-    )
-    */
+        letterSpacing = 0.33.sp,
+    ),
 )

app/src/test/java/dev/kaizen/app/SettingsViewModelTest.kt

@@ -1,67 +1,55 @@
 package dev.kaizen.app
 
 import dev.kaizen.app.settings.AppAppearance
-import dev.kaizen.app.settings.KaizenThemeId
 import dev.kaizen.app.settings.SettingsViewModel
+import dev.kaizen.app.ui.theme.themes.KaizenThemeId
 import org.junit.Assert.assertEquals
 import org.junit.Test
 
-/**
- * High-fidelity JVM Unit Test for the SettingsViewModel.
- * 
- * Verifies that state transitions, user inputs, and theme selections are
- * correctly and reactively managed inside the view model under clean MVVM.
- */
 class SettingsViewModelTest {
 
     @Test
     fun testInitialState() {
         val viewModel = SettingsViewModel()
-        
-        // Assert correct default states
-        assertEquals(KaizenThemeId.Amber, viewModel.selectedTheme.value)
-        assertEquals(AppAppearance.Dark, viewModel.appearanceMode.value)
+        assertEquals(KaizenThemeId.AMBER, viewModel.selectedTheme.value)
+        assertEquals(AppAppearance.System, viewModel.appearanceMode.value)
         assertEquals("Bruno", viewModel.userName.value)
-        assertEquals("gemini-2.5-flash", viewModel.defaultModel.value)
     }
 
     @Test
     fun testSelectTheme() {
         val viewModel = SettingsViewModel()
+        viewModel.selectTheme(KaizenThemeId.AURORA)
+        assertEquals(KaizenThemeId.AURORA, viewModel.selectedTheme.value)
+    }
 
-        // Transition theme to Aurora
-        viewModel.selectTheme(KaizenThemeId.Aurora)
-        
-        assertEquals(KaizenThemeId.Aurora, viewModel.selectedTheme.value)
+    @Test
+    fun testSelectAllThemes() {
+        val viewModel = SettingsViewModel()
+        KaizenThemeId.entries.forEach { id ->
+            viewModel.selectTheme(id)
+            assertEquals(id, viewModel.selectedTheme.value)
+        }
     }
 
     @Test
     fun testSelectAppearance() {
         val viewModel = SettingsViewModel()
-        
-        // Switch appearance to Light Mode
         viewModel.selectAppearance(AppAppearance.Light)
-        
         assertEquals(AppAppearance.Light, viewModel.appearanceMode.value)
     }
 
     @Test
     fun testUpdateUserName() {
         val viewModel = SettingsViewModel()
-        
-        // Update user's name
-        viewModel.updateUserName("  Giuseppe  ") // Should be trimmed
-        
+        viewModel.updateUserName("  Giuseppe  ")
         assertEquals("Giuseppe", viewModel.userName.value)
     }
 
     @Test
     fun testUpdateUserNameBlankIgnored() {
         val viewModel = SettingsViewModel()
-        
-        // Attempting to set an empty/blank name should be ignored
         viewModel.updateUserName("   ")
-        
-        assertEquals("Bruno", viewModel.userName.value) // Remains unchanged
+        assertEquals("Bruno", viewModel.userName.value)
     }
 }