✨ feat(lock): add fingerprint support

Credit to @wooze-pao for providing the required code in #2162

dots/.config/quickshell/ii/modules/lock/LockContext.qml

@@ -2,6 +2,7 @@ import qs
 import qs.modules.common
 import QtQuick
 import Quickshell
+import Quickshell.Io
 import Quickshell.Services.Pam
 
 Scope {
@@ -18,8 +19,13 @@ Scope {
     property string currentText: ""
     property bool unlockInProgress: false
     property bool showFailure: false
+    property bool fingerprintsConfigured: false
     property var targetAction: LockContext.ActionEnum.Unlock
 
+    Component.onCompleted: {
+        fingerprintCheckProcess.running = true;
+    }
+
     function resetTargetAction() {
         root.targetAction = LockContext.ActionEnum.Unlock;
     }
@@ -37,6 +43,46 @@ Scope {
         root.clearText();
         root.unlockInProgress = false;
     }
+    
+    function tryFingerUnlock() {
+        fingerPam.start();
+    } 
+
+    function stopPam() {
+        fingerPam.abort();
+    }
+
+    Process {
+        id: fingerprintCheckProcess
+        command: ["bash", "-c", "fprintd-list $(whoami)"]
+        stdout: StdioCollector {
+            id: fingerprintOutputCollector
+            onStreamFinished: {
+                root.fingerprintsConfigured = fingerprintOutputCollector.text.includes("Fingerprints for user");
+            }
+        }
+        onExited: (exitCode, exitStatus) => {
+            if (exitCode !== 0) {
+                console.warn("fprintd-list command exited with error:", exitCode, exitStatus);
+                root.fingerprintsConfigured = false;
+            }
+        }
+    }
+
+    PamContext {
+        id: fingerPam
+
+        configDirectory: "pam"
+        config: "fprintd.conf"
+
+        onCompleted: result => {
+            if (result == PamResult.Success) {
+                root.unlocked(root.targetAction);
+            } else if (result == PamResult.Error){ // if timeout or etc..
+                tryFingerUnlock()
+            }
+        }
+    }
 
     Timer {
         id: passwordClearTimer