Build native UI shell foundation

shared/src/iosMain/kotlin/com/vnidrop/app/logging/PlatformLogStore.ios.kt

@@ -0,0 +1,95 @@
+package com.vnidrop.app.logging
+
+import platform.Foundation.NSData
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.addressOf
+import kotlinx.cinterop.convert
+import kotlinx.cinterop.usePinned
+import platform.Foundation.NSDate
+import platform.Foundation.NSFileManager
+import platform.Foundation.NSFileModificationDate
+import platform.Foundation.NSFileSize
+import platform.Foundation.NSNumber
+import platform.Foundation.timeIntervalSince1970
+import platform.posix.fclose
+import platform.posix.fopen
+import platform.posix.fwrite
+
+actual fun createPlatformLogStore(appDataDir: String, policy: LogRotationPolicy): PlatformLogStore =
+	IosPlatformLogStore(appDataDir, policy)
+
+actual fun platformNowMillis(): Long =
+	(NSDate().timeIntervalSince1970 * 1000.0).toLong()
+
+@OptIn(ExperimentalForeignApi::class)
+private class IosPlatformLogStore(
+	appDataDir: String,
+	private val policy: LogRotationPolicy,
+) : PlatformLogStore {
+	private val fileManager = NSFileManager.defaultManager
+	private val directory = appDataDir.trimEnd('/') + "/logs"
+	private val activePath = "$directory/app.log"
+
+	override val logDirectory: String = directory
+
+	override fun append(line: String) {
+		ensureDirectory()
+		val bytes = line.encodeToByteArray()
+		if (policy.shouldRotate(fileSize(activePath), bytes.size.toLong())) {
+			rotate()
+		}
+		val file = fopen(activePath, "ab") ?: return
+		try {
+			bytes.usePinned { pinned ->
+				fwrite(pinned.addressOf(0), 1.convert(), bytes.size.convert(), file)
+			}
+		} finally {
+			fclose(file)
+		}
+	}
+
+	override fun listLogFiles(): List<LogFileInfo> {
+		ensureDirectory()
+		val names = fileManager.contentsOfDirectoryAtPath(directory, null).orEmpty()
+			.filterIsInstance<String>()
+			.filter { it.startsWith("app") && it.endsWith(".log") }
+		return names
+			.map { name ->
+				val path = "$directory/$name"
+				LogFileInfo(name, path, fileSize(path), modifiedAt(path))
+			}
+			.sortedByDescending { it.modifiedAtMillis }
+	}
+
+	private fun rotate() {
+		if (policy.maxFiles == 0) {
+			fileManager.removeItemAtPath(activePath, null)
+			return
+		}
+		fileManager.removeItemAtPath("$directory/app.${policy.maxFiles}.log", null)
+		for (index in policy.maxFiles - 1 downTo 1) {
+			val source = "$directory/app.$index.log"
+			if (fileManager.fileExistsAtPath(source)) {
+				fileManager.moveItemAtPath(source, "$directory/app.${index + 1}.log", null)
+			}
+		}
+		if (fileManager.fileExistsAtPath(activePath)) {
+			fileManager.moveItemAtPath(activePath, "$directory/app.1.log", null)
+		}
+	}
+
+	private fun ensureDirectory() {
+		fileManager.createDirectoryAtPath(directory, withIntermediateDirectories = true, attributes = null, error = null)
+	}
+
+	private fun fileSize(path: String): Long {
+		val attributes = fileManager.attributesOfItemAtPath(path, null) ?: return 0L
+		return (attributes[NSFileSize] as? NSNumber)?.longLongValue ?: 0L
+	}
+
+	private fun modifiedAt(path: String): Long {
+		val attributes = fileManager.attributesOfItemAtPath(path, null) ?: return 0L
+		val date = attributes[NSFileModificationDate] as? NSDate ?: return 0L
+		return (date.timeIntervalSince1970 * 1000.0).toLong()
+	}
+}

shared/src/iosMain/kotlin/com/vnidrop/app/platform/PlatformSystemAppearance.ios.kt

@@ -0,0 +1,19 @@
+package com.vnidrop.app.platform
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.SideEffect
+import platform.Foundation.NSNotificationCenter
+
+@Composable
+actual fun PlatformSystemAppearance(isDarkTheme: Boolean) {
+	SideEffect {
+		// The Swift host owns the actual UIKit status bar style. Compose publishes
+		// the resolved theme here so the wrapper can update without coupling common
+		// UI code to iOS-specific view controller APIs.
+		NSNotificationCenter.defaultCenter.postNotificationName(
+			aName = "VniDropThemeChanged",
+			`object` = null,
+			userInfo = mapOf("isDark" to if (isDarkTheme) "true" else "false"),
+		)
+	}
+}