lock: use TextInput for keyboard input instead of Keys on plain Item

modules/lock/LockAuth.qml

@@ -15,26 +15,11 @@ QtObject {
 
     signal authFailed
 
-    function handleKey(event) {
+    function submit() {
         if (_passwd.active || state === "max")
             return;
-
+        if (buffer.length > 0)
-        if (event.key === Qt.Key_Enter || event.key === Qt.Key_Return) {
+            _passwd.start();
-            if (buffer.length > 0)
-                _passwd.start();
-        } else if (event.key === Qt.Key_Backspace) {
-            if (event.modifiers & Qt.ControlModifier)
-                buffer = "";
-            else
-                buffer = buffer.slice(0, -1);
-        } else if (event.key === Qt.Key_Escape) {
-            buffer = "";
-        } else if (event.text && event.text.length === 1) {
-            const c = event.text;
-            // Accept printable ASCII
-            if (c.charCodeAt(0) >= 32 && c.charCodeAt(0) < 127)
-                buffer += c;
-        }
     }
 
     property PamContext _passwd: PamContext {

modules/lock/LockSurface.qml

@@ -139,17 +139,27 @@ WlSessionLockSurface {
         }
     }
 
-    // Keyboard input - focus lives on an Item since WlSessionLockSurface is a window.
+    // Keyboard input via TextInput - engages Qt's full input pipeline including
-    // Aggressively reclaim focus: Component.onCompleted may fire before the surface
+    // text-input protocol, which is more reliable than Keys on a plain Item in
-    // is configured, and other items can steal activeFocus during layout.
+    // layer-shell/lock surfaces where raw wl_keyboard delivery can be flaky.
-    Item {
+    TextInput {
         id: _keyInput
         anchors.fill: parent
         focus: true
-        Keys.onPressed: event => {
+        color: "transparent"
-            if (!root._unlocking)
+        selectionColor: "transparent"
-                root.auth.handleKey(event);
+        selectedTextColor: "transparent"
+        cursorVisible: false
+        enabled: !root._unlocking && root.auth.state !== "max" && root.auth.state !== "busy"
+
+        onTextChanged: root.auth.buffer = text
+
+        Keys.onReturnPressed: root.auth.submit()
+        Keys.onEnterPressed: root.auth.submit()
+        Keys.onEscapePressed: {
+            text = "";
         }
+
         onActiveFocusChanged: {
             if (!activeFocus)
                 forceActiveFocus();
@@ -161,6 +171,16 @@ WlSessionLockSurface {
             _keyInput.forceActiveFocus();
     }
 
+    // Sync TextInput when auth clears buffer externally (PAM submit, lock reset)
+    Connections {
+        target: root.auth
+
+        function onBufferChanged() {
+            if (_keyInput.text !== root.auth.buffer)
+                _keyInput.text = root.auth.buffer;
+        }
+    }
+
     // Unlock animation
     property bool _unlocking: false