fix: green brand theme, iOS launcher icon, password reveal, real login error

- Theme primary now the iOS brand green (#20A050), fixed app-wide (was tied
  to the server's blue primary_color)
- Launcher icon generated from the iOS AppIcon across all densities;
  dropped the placeholder adaptive icon
- PasswordField: eye toggle + brief last-character reveal; used on login,
  profile and CalDAV password inputs
- Login now surfaces the server's actual error detail (verified the JSON
  contract against the live server; a 401 is a genuine credential mismatch)
- CLAUDE.md: correct prod base URL to calendar.scarriffle.com

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/src/main/java/com/scarriffle/calendarr/data/CalendarRepository.kt

@@ -79,7 +79,7 @@ class CalendarRepository @Inject constructor(
                 JSONObject(resp.errorBody()?.string() ?: "").optString("detail")
             }.getOrNull()
             if (detail == "2fa_required") throw TwoFactorRequiredException()
-            throw UnauthorizedException()
+            throw UnauthorizedException(detail?.takeIf { it.isNotBlank() } ?: "Benutzername oder Passwort falsch")
         }
         if (!resp.isSuccessful) throw ApiException(errorDetail(resp.errorBody(), resp.code()))
 

app/src/main/java/com/scarriffle/calendarr/data/remote/ApiException.kt

@@ -7,8 +7,8 @@ import retrofit2.Response
 /** Generic server error carrying the `detail` message when available. */
 open class ApiException(message: String) : Exception(message)
 
-/** Credentials rejected (HTTP 401, not a 2FA prompt). */
-class UnauthorizedException : ApiException("Benutzername oder Passwort falsch")
+/** Credentials rejected (HTTP 401, not a 2FA prompt). Carries the server detail. */
+class UnauthorizedException(message: String = "Benutzername oder Passwort falsch") : ApiException(message)
 
 /** Server requires a TOTP code to finish login (HTTP 401, detail "2fa_required"). */
 class TwoFactorRequiredException : ApiException("2FA-Code erforderlich")

app/src/main/java/com/scarriffle/calendarr/ui/accounts/AccountsScreen.kt

@@ -40,6 +40,7 @@ import androidx.compose.ui.draw.clip
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
+import com.scarriffle.calendarr.ui.components.PasswordField
 import com.scarriffle.calendarr.ui.tr
 import com.scarriffle.calendarr.util.colorFromHex
 
@@ -193,7 +194,7 @@ private fun CalDAVDialog(onDismiss: () -> Unit, onConfirm: (String, String, Stri
         Spacer(Modifier.size(8.dp))
         OutlinedTextField(user, { user = it }, label = { Text(tr("caldav.username")) }, singleLine = true, modifier = Modifier.fillMaxWidth())
         Spacer(Modifier.size(8.dp))
-        OutlinedTextField(pass, { pass = it }, label = { Text(tr("caldav.password")) }, singleLine = true, visualTransformation = androidx.compose.ui.text.input.PasswordVisualTransformation(), modifier = Modifier.fillMaxWidth())
+        PasswordField(pass, { pass = it }, label = tr("caldav.password"), modifier = Modifier.fillMaxWidth())
     }
 }
 

app/src/main/java/com/scarriffle/calendarr/ui/auth/LoginScreen.kt

@@ -26,10 +26,10 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.input.KeyboardType
-import androidx.compose.ui.text.input.PasswordVisualTransformation
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import com.scarriffle.calendarr.data.CredentialStore
+import com.scarriffle.calendarr.ui.components.PasswordField
 import com.scarriffle.calendarr.ui.tr
 
 @Composable
@@ -63,16 +63,10 @@ fun LoginScreen(
                 modifier = Modifier.fillMaxWidth(),
             )
             Spacer(Modifier.height(12.dp))
-            OutlinedTextField(
+            PasswordField(
                 value = vm.password,
                 onValueChange = vm::onPasswordChange,
-                label = { Text(tr("auth.password")) },
-                singleLine = true,
-                visualTransformation = PasswordVisualTransformation(),
-                keyboardOptions = KeyboardOptions(
-                    keyboardType = KeyboardType.Password,
-                    imeAction = ImeAction.Done,
-                ),
+                label = tr("auth.password"),
                 modifier = Modifier.fillMaxWidth(),
             )
             AnimatedVisibility(vm.showTotp) {

app/src/main/java/com/scarriffle/calendarr/ui/components/PasswordField.kt

@@ -0,0 +1,88 @@
+package com.scarriffle.calendarr.ui.components
+
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Visibility
+import androidx.compose.material.icons.filled.VisibilityOff
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.AnnotatedString
+import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.OffsetMapping
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.text.input.TransformedText
+import androidx.compose.ui.text.input.VisualTransformation
+import kotlinx.coroutines.delay
+
+/**
+ * Password input with two affordances the plain field lacks:
+ *  - an eye toggle to reveal the full value, and
+ *  - a brief reveal of the most recently typed character (~1.2s) so the user
+ *    can tell whether a keystroke landed as intended.
+ */
+@Composable
+fun PasswordField(
+    value: String,
+    onValueChange: (String) -> Unit,
+    label: String,
+    modifier: Modifier = Modifier,
+    imeAction: ImeAction = ImeAction.Done,
+) {
+    var fullyVisible by remember { mutableStateOf(false) }
+    var revealLast by remember { mutableStateOf(false) }
+
+    // Reveal the last character briefly after each change.
+    LaunchedEffect(value) {
+        if (value.isNotEmpty() && !fullyVisible) {
+            revealLast = true
+            delay(1200)
+            revealLast = false
+        } else {
+            revealLast = false
+        }
+    }
+
+    val transformation = when {
+        fullyVisible -> VisualTransformation.None
+        revealLast -> LastCharVisibleTransformation
+        else -> PasswordVisualTransformation()
+    }
+
+    OutlinedTextField(
+        value = value,
+        onValueChange = onValueChange,
+        label = { Text(label) },
+        singleLine = true,
+        visualTransformation = transformation,
+        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password, imeAction = imeAction),
+        trailingIcon = {
+            IconButton(onClick = { fullyVisible = !fullyVisible }) {
+                Icon(
+                    imageVector = if (fullyVisible) Icons.Filled.VisibilityOff else Icons.Filled.Visibility,
+                    contentDescription = null,
+                )
+            }
+        },
+        modifier = modifier,
+    )
+}
+
+/** Masks every character except the last with a bullet. 1:1 char mapping → identity offsets. */
+private val LastCharVisibleTransformation = object : VisualTransformation {
+    override fun filter(text: AnnotatedString): TransformedText {
+        val masked = buildString {
+            for (i in text.indices) append(if (i == text.lastIndex) text[i] else '•')
+        }
+        return TransformedText(AnnotatedString(masked), OffsetMapping.Identity)
+    }
+}

app/src/main/java/com/scarriffle/calendarr/ui/profile/ProfileScreen.kt

@@ -32,9 +32,9 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.text.input.PasswordVisualTransformation
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
+import com.scarriffle.calendarr.ui.components.PasswordField
 import com.scarriffle.calendarr.ui.tr
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -105,11 +105,11 @@ private fun PasswordSection(vm: ProfileViewModel) {
     var localError by remember { mutableStateOf<String?>(null) }
 
     SectionTitle(tr("profile.change_password"))
-    OutlinedTextField(value = current, onValueChange = { current = it }, label = { Text(tr("profile.current_password")) }, singleLine = true, visualTransformation = PasswordVisualTransformation(), modifier = Modifier.fillMaxWidth())
+    PasswordField(value = current, onValueChange = { current = it }, label = tr("profile.current_password"), modifier = Modifier.fillMaxWidth())
     Spacer(Modifier.size(8.dp))
-    OutlinedTextField(value = new1, onValueChange = { new1 = it }, label = { Text(tr("profile.new_password")) }, singleLine = true, visualTransformation = PasswordVisualTransformation(), modifier = Modifier.fillMaxWidth())
+    PasswordField(value = new1, onValueChange = { new1 = it }, label = tr("profile.new_password"), modifier = Modifier.fillMaxWidth())
     Spacer(Modifier.size(8.dp))
-    OutlinedTextField(value = new2, onValueChange = { new2 = it }, label = { Text(tr("profile.new_password_repeat")) }, singleLine = true, visualTransformation = PasswordVisualTransformation(), modifier = Modifier.fillMaxWidth())
+    PasswordField(value = new2, onValueChange = { new2 = it }, label = tr("profile.new_password_repeat"), modifier = Modifier.fillMaxWidth())
     localError?.let { Text(it, color = MaterialTheme.colorScheme.error, style = MaterialTheme.typography.bodySmall) }
     Spacer(Modifier.size(8.dp))
     Button(onClick = {
@@ -127,7 +127,7 @@ private fun TwoFactorSection(vm: ProfileViewModel) {
     Text(if (enabled) tr("profile.twofa.active") else tr("profile.twofa.inactive"), color = MaterialTheme.colorScheme.onSurfaceVariant, style = MaterialTheme.typography.bodyMedium)
     Spacer(Modifier.size(8.dp))
     if (enabled) {
-        OutlinedTextField(value = disablePw, onValueChange = { disablePw = it }, label = { Text(tr("twofa.password_placeholder")) }, singleLine = true, visualTransformation = PasswordVisualTransformation(), modifier = Modifier.fillMaxWidth())
+        PasswordField(value = disablePw, onValueChange = { disablePw = it }, label = tr("twofa.password_placeholder"), modifier = Modifier.fillMaxWidth())
         Spacer(Modifier.size(8.dp))
         OutlinedButton(onClick = { vm.disable2fa(disablePw); disablePw = "" }) { Text(tr("profile.twofa.disable")) }
     } else {

app/src/main/java/com/scarriffle/calendarr/ui/theme/Theme.kt

@@ -10,23 +10,27 @@ import com.scarriffle.calendarr.util.colorFromHex
 import com.scarriffle.calendarr.util.contrastingTextColor
 
 /**
- * The Calendarr UI is a dark theme whose accent colours follow the user's
- * synced [AppSettings] (mirrors the iOS appearance settings).
+ * The Calendarr brand accent — the green from the iOS `AccentColor` asset
+ * (#20A050). This drives the global control tint (buttons, FAB, switches,
+ * top bar) regardless of the server's per-calendar colours, matching iOS
+ * where the app tint is fixed and `primary_color` only styles calendar
+ * elements (e.g. the "today" highlight, read from [AppSettings]).
  */
+val BrandGreen = Color(0xFF20A050)
+
 @Composable
 fun CalendarrTheme(
     settings: AppSettings = AppSettings(),
     content: @Composable () -> Unit,
 ) {
-    val primary = colorFromHex(settings.primaryColor, Color(0xFF4285F4))
-    val accent = colorFromHex(settings.accentColor, Color(0xFFEA4335))
+    val primary = BrandGreen
 
     val colors = darkColorScheme(
         primary = primary,
         onPrimary = primary.contrastingTextColor(),
-        secondary = accent,
-        onSecondary = accent.contrastingTextColor(),
-        tertiary = accent,
+        secondary = primary,
+        onSecondary = primary.contrastingTextColor(),
+        tertiary = primary,
         background = Color(0xFF000000),
         onBackground = Color(0xFFF2F2F7),
         surface = Color(0xFF1C1C1E),

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -1,27 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportWidth="108"
-    android:viewportHeight="108">
-    <path
-        android:fillColor="#FFFFFF"
-        android:pathData="M34,30h40a6,6 0 0 1 6,6v40a6,6 0 0 1 -6,6H34a6,6 0 0 1 -6,-6V36a6,6 0 0 1 6,-6z" />
-    <path
-        android:fillColor="#4285F4"
-        android:pathData="M34,30h40a6,6 0 0 1 6,6v8H28v-8a6,6 0 0 1 6,-6z" />
-    <path
-        android:fillColor="#4285F4"
-        android:pathData="M40,24h4v12h-4z M64,24h4v12h-4z" />
-    <path
-        android:fillColor="#EA4335"
-        android:pathData="M38,52h8v8h-8z" />
-    <path
-        android:fillColor="#34A853"
-        android:pathData="M50,52h8v8h-8z" />
-    <path
-        android:fillColor="#FBBC05"
-        android:pathData="M62,52h8v8h-8z" />
-    <path
-        android:fillColor="#7090C0"
-        android:pathData="M38,64h8v8h-8z M50,64h8v8h-8z" />
-</vector>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,4 +0,0 @@
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@color/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,4 +0,0 @@
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@color/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

app/src/main/res/values/ic_launcher_colors.xml

@@ -1,3 +0,0 @@
-<resources>
-    <color name="ic_launcher_background">#0B1220</color>
-</resources>

claude.md

@@ -12,7 +12,7 @@ Die folgenden Ordner dienen NUR zur Referenz. NIEMALS Dateien darin verändern,
 Alle Änderungen und neue Dateien kommen ausschliesslich in `../Calendarr Android/`.
 
 ## Server
-- Basis-URL (Prod): https://cal.scarriffle.com
+- Basis-URL (Prod): https://calendar.scarriffle.com
 - Auth: Erst Server-URL eingeben, dann Benutzername + Passwort
 - Credentials werden auf Android im EncryptedSharedPreferences gespeichert (Äquivalent zu Apple Keychain)