fix(ui): redesign main screens for Myne-style

- CustomTopAppBar: centered title, surface color (no shadow), 64dp height.
- HomeScreen: reduced top bar from 4+ icons to 2 (palette + overflow menu).
- Settings moved into overflow menu (was separate icon).
- Recent files limit moved into overflow menu (was separate icon).
- Card elevation reduced (6/2dp → 4/1dp) for flatter Myne look.
- surfaceContainerHigh → surfaceContainerLow for softer card background.
- LibraryScreen cards: same elevation/background treatment.
- ':app:assembleOssDebug' passes, APK updated on download page.

app/src/main/java/com/dueattendant149/bookreader/reader/HomeScreen.kt

@@ -855,10 +855,10 @@ fun RecentFileCard(
             .combinedClickable(onClick = onClick, onLongClick = onLongClick),
         shape = MaterialTheme.shapes.large,
         colors = androidx.compose.material3.CardDefaults.elevatedCardColors(
-            containerColor = MaterialTheme.colorScheme.surfaceContainerHigh
+            containerColor = MaterialTheme.colorScheme.surfaceContainerLow
         ),
         elevation = androidx.compose.material3.CardDefaults.elevatedCardElevation(
-            defaultElevation = if (isSelected) 6.dp else 2.dp
+            defaultElevation = if (isSelected) 4.dp else 1.dp
         )
     ) {
         Column(modifier = Modifier.fillMaxWidth()) {
@@ -1109,7 +1109,6 @@ fun DefaultTopAppBar(
     var showLimitMenu by remember { mutableStateOf(false) }
     val context = LocalContext.current
     var hideReaderAiFeatures by remember { mutableStateOf(loadHideReaderAiFeatures(context)) }
-
     CustomTopAppBar(title = { }, navigationIcon = {
         IconButton(onClick = onDrawerClick) {
             BadgedBox(
@@ -1122,38 +1121,9 @@ fun DefaultTopAppBar(
             }
         }
     }, actions = {
-        IconButton(onClick = onSettingsClick) {
-            Icon(Icons.Default.Settings, contentDescription = stringResource(R.string.settings))
-        }
-        Box {
         IconButton(onClick = onAppThemeClick) {
             Icon(painterResource(id = R.drawable.palette), contentDescription = stringResource(R.string.content_desc_app_theme))
         }
-        }
-        // Recent Files Limit Menu
-        Box {
-            IconButton(onClick = { showLimitMenu = true }) {
-                Icon(Icons.Default.FormatListNumbered, contentDescription = stringResource(R.string.options_recent_limit))
-            }
-            DropdownMenu(
-                expanded = showLimitMenu, onDismissRequest = { showLimitMenu = false }
-            ) {
-                val limitOptions = listOf(0, 10, 20, 50, 100)
-                limitOptions.forEach { limit ->
-                    DropdownMenuItem(
-                        text = { Text(if (limit == 0) stringResource(R.string.options_no_limit) else stringResource(R.string.options_files_limit, limit)) },
-                        onClick = {
-                            onRecentFilesLimitChange(limit)
-                            showLimitMenu = false
-                        },
-                        trailingIcon = if (uiState.recentFilesLimit == limit) {
-                            { Icon(Icons.Default.Check, contentDescription = stringResource(R.string.content_desc_selected)) }
-                        } else null
-                    )
-                }
-            }
-        }
-
         // Options Menu (MoreVert)
         Box {
             IconButton(onClick = { showOptionsMenu = true }) {
@@ -1161,13 +1131,23 @@ fun DefaultTopAppBar(
             }
             DropdownMenu(
                 expanded = showOptionsMenu, onDismissRequest = { showOptionsMenu = false }) {
-                DropdownMenuItem(text = { Text(stringResource(R.string.about_title)) }, onClick = {
+                DropdownMenuItem(text = { Text(stringResource(R.string.settings)) }, onClick = {
-                    onAboutClick()
+                    onSettingsClick()
+                    showOptionsMenu = false
+                })
+
+                DropdownMenuItem(text = { Text(stringResource(if (uiState.recentFilesLimit == 0) R.string.options_no_limit else R.string.options_files_limit, uiState.recentFilesLimit)) }, onClick = {
+                    showLimitMenu = true
                     showOptionsMenu = false
                 })
 
                 HorizontalDivider()
 
+                DropdownMenuItem(text = { Text(stringResource(R.string.about_title)) }, onClick = {
+                    onAboutClick()
+                    showOptionsMenu = false
+                })
+
                 DropdownMenuItem(text = { Text(stringResource(R.string.options_enable_multi_tab_reading)) }, onClick = {
                     onTabsToggle(!uiState.isTabsEnabled)
                     showOptionsMenu = false
@@ -1241,6 +1221,7 @@ fun DefaultTopAppBar(
                     onClearCache()
                     showOptionsMenu = false
                 })
+
                 DropdownMenuItem(text = { Text(stringResource(R.string.options_clear_reflow_cache)) }, onClick = {
                     onClearReflowCache()
                     showOptionsMenu = false
@@ -1278,6 +1259,27 @@ fun DefaultTopAppBar(
                 }
             }
         }
+
+        // Recent Files Limit Submenu
+        if (showLimitMenu) {
+            DropdownMenu(
+                expanded = showLimitMenu, onDismissRequest = { showLimitMenu = false }
+            ) {
+                val limitOptions = listOf(0, 10, 20, 50, 100)
+                limitOptions.forEach { limit ->
+                    DropdownMenuItem(
+                        text = { Text(if (limit == 0) stringResource(R.string.options_no_limit) else stringResource(R.string.options_files_limit, limit)) },
+                        onClick = {
+                            onRecentFilesLimitChange(limit)
+                            showLimitMenu = false
+                        },
+                        trailingIcon = if (uiState.recentFilesLimit == limit) {
+                            { Icon(Icons.Default.Check, contentDescription = stringResource(R.string.content_desc_selected)) }
+                        } else null
+                    )
+                }
+            }
+        }
     })
 }
 

app/src/main/java/com/dueattendant149/bookreader/reader/LibraryScreen.kt

@@ -1630,7 +1630,7 @@ private fun ShelfListItem(
             containerColor = MaterialTheme.colorScheme.surfaceContainerLow
         ),
         elevation = androidx.compose.material3.CardDefaults.elevatedCardElevation(
-            defaultElevation = if (isSelected) 8.dp else 2.dp
+            defaultElevation = if (isSelected) 4.dp else 1.dp
         ),
         modifier = Modifier
             .fillMaxWidth()
@@ -1709,7 +1709,7 @@ private fun LibraryListItem(
             containerColor = MaterialTheme.colorScheme.surfaceContainerLow
         ),
         elevation = androidx.compose.material3.CardDefaults.elevatedCardElevation(
-            defaultElevation = if (isSelected) 6.dp else 2.dp
+            defaultElevation = if (isSelected) 4.dp else 1.dp
         ),
         modifier = Modifier
             .fillMaxWidth()

app/src/main/java/com/dueattendant149/bookreader/reader/SharedComposables.kt

@@ -337,14 +337,14 @@ fun CustomTopAppBar(
 ) {
     Surface(
         modifier = modifier.fillMaxWidth(),
-        color = MaterialTheme.colorScheme.surfaceVariant,
+        color = MaterialTheme.colorScheme.surface,
-        shadowElevation = 2.dp
+        shadowElevation = 0.dp
     ) {
         Row(
             modifier = Modifier
                 .fillMaxWidth()
                 .statusBarsPadding()
-                .height(56.dp)
+                .height(64.dp)
                 .padding(horizontal = 4.dp),
             verticalAlignment = Alignment.CenterVertically
         ) {
@@ -352,9 +352,8 @@ fun CustomTopAppBar(
 
             Box(
                 modifier = Modifier
-                    .weight(1f)
+                    .weight(1f),
-                    .padding(start = 12.dp),
+                contentAlignment = Alignment.Center
-                contentAlignment = Alignment.CenterStart
             ) {
                 ProvideTextStyle(value = MaterialTheme.typography.titleLarge) {
                     title()