Remove unused Linux native code, dependencies, and dbusmenu integration.

Author: kdroidFilter

src/jvmMain/kotlin/com/kdroid/composetray/lib/linux/JniRunnable.kt

@@ -0,0 +1,11 @@
+package com.kdroid.composetray.lib.linux
+
+/**
+ * Concrete Runnable wrapper for JNI callbacks.
+ * GraalVM native-image cannot resolve run() on SAM-converted lambda classes
+ * because they are dynamically generated and not registered for JNI access.
+ * This wrapper provides a known, statically registered class.
+ */
+internal class JniRunnable(private val action: () -> Unit) : Runnable {
+    override fun run() = action()
+}

src/jvmMain/kotlin/com/kdroid/composetray/lib/linux/LinuxLibTray.kt

@@ -0,0 +1,69 @@
+package com.kdroid.composetray.lib.linux
+
+import com.kdroid.composetray.utils.NativeLibraryLoader
+
+/**
+ * JNI bridge to the native Linux tray library (libLinuxTray.so).
+ * Replaces the previous JNA/Go-based approach with a pure C + sd-bus implementation.
+ * Follows the same patterns as MacNativeBridge.
+ */
+internal object LinuxNativeBridge {
+
+    init {
+        NativeLibraryLoader.load("LinuxTray", LinuxNativeBridge::class.java)
+    }
+
+    // -- Lifecycle ---------------------------------------------------------------
+
+    /** Create a tray instance. Returns a native handle (pointer as long). */
+    @JvmStatic external fun nativeCreate(iconBytes: ByteArray?, tooltip: String?): Long
+
+    /** Start the D-Bus event loop (blocks until nativeQuit is called). */
+    @JvmStatic external fun nativeRun(handle: Long): Int
+
+    /** Signal the event loop to stop. Thread-safe. */
+    @JvmStatic external fun nativeQuit(handle: Long)
+
+    /** Destroy the tray and release all resources. Call after nativeRun returns. */
+    @JvmStatic external fun nativeDestroy(handle: Long)
+
+    // -- Tray properties ---------------------------------------------------------
+
+    @JvmStatic external fun nativeSetIcon(handle: Long, iconBytes: ByteArray)
+    @JvmStatic external fun nativeSetTitle(handle: Long, title: String?)
+    @JvmStatic external fun nativeSetTooltip(handle: Long, tooltip: String?)
+
+    // -- Callbacks ---------------------------------------------------------------
+
+    @JvmStatic external fun nativeSetClickCallback(handle: Long, callback: Runnable?)
+    @JvmStatic external fun nativeSetRClickCallback(handle: Long, callback: Runnable?)
+
+    /** Register a per-menu-item callback. The callback is keyed by menuId. */
+    @JvmStatic external fun nativeSetMenuItemCallback(handle: Long, menuId: Int, callback: Runnable?)
+
+    // -- Click position ----------------------------------------------------------
+
+    /** Writes [x, y] into outXY. */
+    @JvmStatic external fun nativeGetLastClickXY(handle: Long, outXY: IntArray)
+
+    // -- Menu management ---------------------------------------------------------
+
+    @JvmStatic external fun nativeResetMenu(handle: Long)
+    @JvmStatic external fun nativeAddMenuItem(handle: Long, title: String?, tooltip: String?): Int
+    @JvmStatic external fun nativeAddMenuItemCheckbox(handle: Long, title: String?, tooltip: String?, checked: Boolean): Int
+    @JvmStatic external fun nativeAddSeparator(handle: Long)
+    @JvmStatic external fun nativeAddSubMenuItem(handle: Long, parentId: Int, title: String?, tooltip: String?): Int
+    @JvmStatic external fun nativeAddSubMenuItemCheckbox(handle: Long, parentId: Int, title: String?, tooltip: String?, checked: Boolean): Int
+    @JvmStatic external fun nativeAddSubSeparator(handle: Long, parentId: Int)
+
+    // -- Per-item operations -----------------------------------------------------
+
+    @JvmStatic external fun nativeItemSetTitle(handle: Long, id: Int, title: String?): Int
+    @JvmStatic external fun nativeItemEnable(handle: Long, id: Int)
+    @JvmStatic external fun nativeItemDisable(handle: Long, id: Int)
+    @JvmStatic external fun nativeItemShow(handle: Long, id: Int)
+    @JvmStatic external fun nativeItemHide(handle: Long, id: Int)
+    @JvmStatic external fun nativeItemCheck(handle: Long, id: Int)
+    @JvmStatic external fun nativeItemUncheck(handle: Long, id: Int)
+    @JvmStatic external fun nativeItemSetIcon(handle: Long, id: Int, iconBytes: ByteArray)
+}