greeter: New Greeter Settings UI & Sync fixes

- Add PAM Auth via GUI
- Added new sync flags
- Refactored cache directory management & many others
- Fix for wireplumber permissions
- Fix for polkit auth w/icon
- Add pam_fprintd timeout=5 to prevent 30s auth blocks when using password

quickshell/Modals/PolkitAuthModal.qml

@@ -1,5 +1,6 @@
 import QtQuick
 import Quickshell
+import Quickshell.Io
 import qs.Common
 import qs.Services
 import qs.Widgets
@@ -11,8 +12,45 @@ FloatingWindow {
     property string passwordInput: ""
     property var currentFlow: PolkitService.agent?.flow
     property bool isLoading: false
+    property bool awaitingFprintForPassword: false
     readonly property int inputFieldHeight: Theme.fontSizeMedium + Theme.spacingL * 2
 
+    property string polkitEtcPamText: ""
+    property string polkitLibPamText: ""
+    property string systemAuthPamText: ""
+    property string commonAuthPamText: ""
+    property string passwordAuthPamText: ""
+    readonly property bool polkitPamHasFprint: {
+        const polkitText = polkitEtcPamText !== "" ? polkitEtcPamText : polkitLibPamText;
+        if (!polkitText)
+            return false;
+        return pamModuleEnabled(polkitText, "pam_fprintd") || (polkitText.includes("system-auth") && pamModuleEnabled(systemAuthPamText, "pam_fprintd")) || (polkitText.includes("common-auth") && pamModuleEnabled(commonAuthPamText, "pam_fprintd")) || (polkitText.includes("password-auth") && pamModuleEnabled(passwordAuthPamText, "pam_fprintd"));
+    }
+
+    function stripPamComment(line) {
+        if (!line)
+            return "";
+        const trimmed = line.trim();
+        if (!trimmed || trimmed.startsWith("#"))
+            return "";
+        const hashIdx = trimmed.indexOf("#");
+        if (hashIdx >= 0)
+            return trimmed.substring(0, hashIdx).trim();
+        return trimmed;
+    }
+
+    function pamModuleEnabled(pamText, moduleName) {
+        if (!pamText || !moduleName)
+            return false;
+        const lines = pamText.split(/\r?\n/);
+        for (let i = 0; i < lines.length; i++) {
+            const line = stripPamComment(lines[i]);
+            if (line && line.includes(moduleName))
+                return true;
+        }
+        return false;
+    }
+
     function focusPasswordField() {
         passwordField.forceActiveFocus();
     }
@@ -20,6 +58,7 @@ FloatingWindow {
     function show() {
         passwordInput = "";
         isLoading = false;
+        awaitingFprintForPassword = false;
         visible = true;
         Qt.callLater(focusPasswordField);
     }
@@ -28,17 +67,27 @@ FloatingWindow {
         visible = false;
     }
 
+    function _commitSubmit() {
+        isLoading = true;
+        awaitingFprintForPassword = false;
+        currentFlow.submit(passwordInput);
+        passwordInput = "";
+    }
+
     function submitAuth() {
         if (!currentFlow || isLoading)
             return;
-        isLoading = true;
-        currentFlow.submit(passwordInput);
-        passwordInput = "";
+        if (!currentFlow.isResponseRequired) {
+            awaitingFprintForPassword = true;
+            return;
+        }
+        _commitSubmit();
     }
 
     function cancelAuth() {
         if (isLoading)
             return;
+        awaitingFprintForPassword = false;
         if (currentFlow) {
             currentFlow.cancelAuthenticationRequest();
             return;
@@ -60,6 +109,7 @@ FloatingWindow {
         }
         passwordInput = "";
         isLoading = false;
+        awaitingFprintForPassword = false;
     }
 
     Connections {
@@ -83,6 +133,11 @@ FloatingWindow {
         function onIsResponseRequiredChanged() {
             if (!currentFlow.isResponseRequired)
                 return;
+            if (awaitingFprintForPassword && passwordInput !== "") {
+                _commitSubmit();
+                return;
+            }
+            awaitingFprintForPassword = false;
             isLoading = false;
             passwordInput = "";
             passwordField.forceActiveFocus();
@@ -101,6 +156,41 @@ FloatingWindow {
         }
     }
 
+    FileView {
+        path: "/etc/pam.d/polkit-1"
+        printErrors: false
+        onLoaded: root.polkitEtcPamText = text()
+        onLoadFailed: root.polkitEtcPamText = ""
+    }
+
+    FileView {
+        path: "/usr/lib/pam.d/polkit-1"
+        printErrors: false
+        onLoaded: root.polkitLibPamText = text()
+        onLoadFailed: root.polkitLibPamText = ""
+    }
+
+    FileView {
+        path: "/etc/pam.d/system-auth"
+        printErrors: false
+        onLoaded: root.systemAuthPamText = text()
+        onLoadFailed: root.systemAuthPamText = ""
+    }
+
+    FileView {
+        path: "/etc/pam.d/common-auth"
+        printErrors: false
+        onLoaded: root.commonAuthPamText = text()
+        onLoadFailed: root.commonAuthPamText = ""
+    }
+
+    FileView {
+        path: "/etc/pam.d/password-auth"
+        printErrors: false
+        onLoaded: root.passwordAuthPamText = text()
+        onLoadFailed: root.passwordAuthPamText = ""
+    }
+
     FocusScope {
         id: contentFocusScope
 
@@ -205,36 +295,30 @@ FloatingWindow {
                 visible: text !== ""
             }
 
-            Rectangle {
+            DankTextField {
+                id: passwordField
+
                 width: parent.width
                 height: inputFieldHeight
-                radius: Theme.cornerRadius
-                color: Theme.surfaceHover
-                border.color: passwordField.activeFocus ? Theme.primary : Theme.outlineStrong
-                border.width: passwordField.activeFocus ? 2 : 1
+                backgroundColor: Theme.surfaceHover
+                normalBorderColor: Theme.outlineStrong
+                focusedBorderColor: Theme.primary
+                borderWidth: 1
+                focusedBorderWidth: 2
+                leftIconName: polkitPamHasFprint ? "fingerprint" : ""
+                leftIconSize: 20
+                leftIconColor: Theme.primary
+                leftIconFocusedColor: Theme.primary
                 opacity: isLoading ? 0.5 : 1
-
-                MouseArea {
-                    anchors.fill: parent
-                    enabled: !isLoading
-                    onClicked: passwordField.forceActiveFocus()
-                }
-
-                DankTextField {
-                    id: passwordField
-
-                    anchors.fill: parent
-                    font.pixelSize: Theme.fontSizeMedium
-                    textColor: Theme.surfaceText
-                    text: passwordInput
-                    showPasswordToggle: !(currentFlow?.responseVisible ?? false)
-                    echoMode: (currentFlow?.responseVisible ?? false) || passwordVisible ? TextInput.Normal : TextInput.Password
-                    placeholderText: ""
-                    backgroundColor: "transparent"
-                    enabled: !isLoading
-                    onTextEdited: passwordInput = text
-                    onAccepted: submitAuth()
-                }
+                font.pixelSize: Theme.fontSizeMedium
+                textColor: Theme.surfaceText
+                text: passwordInput
+                showPasswordToggle: !(currentFlow?.responseVisible ?? false)
+                echoMode: (currentFlow?.responseVisible ?? false) || passwordVisible ? TextInput.Normal : TextInput.Password
+                placeholderText: ""
+                enabled: !isLoading
+                onTextEdited: passwordInput = text
+                onAccepted: submitAuth()
             }
 
             StyledText {

quickshell/Modals/Settings/SettingsContent.qml

@@ -241,6 +241,21 @@ FocusScope {
             }
         }
 
+        Loader {
+            id: greeterLoader
+            anchors.fill: parent
+            active: root.currentIndex === 31
+            visible: active
+            focus: active
+
+            sourceComponent: GreeterTab {}
+
+            onActiveChanged: {
+                if (active && item)
+                    Qt.callLater(() => item.forceActiveFocus());
+            }
+        }
+
         Loader {
             id: pluginsLoader
             anchors.fill: parent
@@ -470,7 +485,7 @@ FocusScope {
 
             onActiveChanged: {
                 if (active && item)
-                Qt.callLater(() => item.forceActiveFocus());
+                    Qt.callLater(() => item.forceActiveFocus());
             }
         }
 
@@ -485,7 +500,7 @@ FocusScope {
 
             onActiveChanged: {
                 if (active && item)
-                Qt.callLater(() => item.forceActiveFocus());
+                    Qt.callLater(() => item.forceActiveFocus());
             }
         }
     }

quickshell/Modals/Settings/SettingsSidebar.qml

@@ -287,6 +287,12 @@ Rectangle {
                     "icon": "lock",
                     "tabIndex": 11
                 },
+                {
+                    "id": "greeter",
+                    "text": I18n.tr("Greeter"),
+                    "icon": "login",
+                    "tabIndex": 31
+                },
                 {
                     "id": "power_sleep",
                     "text": I18n.tr("Power & Sleep"),