Rename app to Nikki, add about section with logo and author info

- App name: Memos App → Nikki (from Japanese 日記, diary)
- Theme: Theme.MemosApp → Theme.Nikki
- Composable: MemosAppTheme → NikkiTheme
- Backup filename: memos-backup.json → nikki-backup.json
- Settings about section: 96dp logo, app name, version,
  one-liner summary, author, and GitHub issues link
- Notification subtext fallback: "nikki"

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>
Co-Authored-By: Claude Opus 4.6 (1M context)

composeApp/src/androidMain/kotlin/com/avinal/memos/notifications/TaskNotificationManager.kt

@@ -84,7 +84,7 @@ object TaskNotificationManager {
             .setContentTitle(title)
             .setContentText(dueLabel)
             .setStyle(NotificationCompat.BigTextStyle().bigText(bigText))
-            .setSubText(when (priority) { 1 -> "p1 urgent"; 2 -> "p2 medium"; 3 -> "p3 low"; else -> "memos" })
+            .setSubText(when (priority) { 1 -> "p1 urgent"; 2 -> "p2 medium"; 3 -> "p3 low"; else -> "nikki" })
             .setWhen(System.currentTimeMillis())
             .setShowWhen(true)
             .setPriority(notifPriority)

composeApp/src/commonMain/kotlin/com/avinal/memos/App.kt

@@ -5,7 +5,7 @@ import coil3.ImageLoader
 import coil3.compose.setSingletonImageLoaderFactory
 import coil3.network.ktor3.KtorNetworkFetcherFactory
 import com.avinal.memos.ui.navigation.AppNavHost
-import com.avinal.memos.ui.theme.MemosAppTheme
+import com.avinal.memos.ui.theme.NikkiTheme
 import com.avinal.memos.util.LocalAppDependencies
 
 @Composable
@@ -20,7 +20,7 @@ fun App() {
             .build()
     }
 
-    MemosAppTheme {
+    NikkiTheme {
         AppNavHost(deps)
     }
 }

composeApp/src/commonMain/kotlin/com/avinal/memos/ui/settings/SettingsScreen.kt

@@ -215,7 +215,7 @@ fun SettingsScreen(
             fontSize = 15.sp, color = accent,
             modifier = Modifier.clickable {
                 viewModel.getExportJson { json ->
-                    saveFile("memos-backup.json", json)
+                    saveFile("nikki-backup.json", json)
                 }
             }.padding(vertical = 6.dp),
         )
@@ -231,16 +231,29 @@ fun SettingsScreen(
         Spacer(Modifier.height(36.dp))
         SectionHeader("about")
 
-        Column(
+        Row(
             modifier = Modifier.fillMaxWidth().padding(vertical = 12.dp),
-            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.spacedBy(16.dp),
         ) {
-            AppLogo(size = 64f)
-            Spacer(Modifier.height(10.dp))
-            Text("memosapp", fontSize = 18.sp, fontWeight = FontWeight.Light, color = MaterialTheme.colorScheme.onBackground)
-            Text("version 1.0.0", fontSize = 12.sp, color = MaterialTheme.colorScheme.onSurfaceVariant)
+            AppLogo(size = 96f)
+            Column {
+                Text("nikki", fontSize = 24.sp, fontWeight = FontWeight.Light, color = MaterialTheme.colorScheme.onBackground)
+                Text("v1.0.0", fontSize = 12.sp, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                Spacer(Modifier.height(4.dp))
+                Text("a memos client with todoist-style tasks", fontSize = 13.sp, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                Spacer(Modifier.height(2.dp))
+                Text("by avinal kumar", fontSize = 12.sp, color = MaterialTheme.colorScheme.onSurfaceVariant)
+            }
         }
 
+        Spacer(Modifier.height(8.dp))
+        Text(
+            "report issues at github.com/avinal/nikki",
+            fontSize = 12.sp,
+            color = accent,
+        )
+
         Spacer(Modifier.height(36.dp))
 
         Text(

composeApp/src/commonMain/kotlin/com/avinal/memos/ui/theme/Theme.kt

@@ -9,7 +9,7 @@ import androidx.compose.ui.graphics.Color
 import com.avinal.memos.util.LocalAppDependencies
 
 @Composable
-fun MemosAppTheme(content: @Composable () -> Unit) {
+fun NikkiTheme(content: @Composable () -> Unit) {
     val deps = LocalAppDependencies.current
     val themeName by deps.tokenStore.theme.collectAsState(initial = "DARK")
     val accentName by deps.tokenStore.accentColor.collectAsState(initial = "Cobalt")