Add high contrast, and make remote desktop configurable

Two of the three panels still handed to GNOME, having actually checked
each rather than repeating that they were not worth owning.

Universal Access turned out to be mostly ours already: the magnifier,
pointer size, text scale, motion and dimming were all present. High
contrast was the real gap. It reaches GTK4 applications through the
desktop portal, which republishes GNOME's accessibility setting as
org.freedesktop.appearance contrast -- so no high-contrast theme is
involved, and none is installed here. Verified end to end: committing
the preference drove gsettings and the portal reported contrast 1.

Sticky, slow and bounce keys stay absent. There is no Wayland or
Hyprland implementation, and the compositor would store the XKB option
while nothing ever acted on it.

Remote desktop gained port, view-only, and clearing stored credentials.
SETTING credentials opens a terminal running grdctl, which prompts for
the password itself. That is not a hand-off for lack of effort: grdctl
takes the password on a terminal and core-dumps without one, and the
only alternative -- passing it as an argument -- would publish it
through /proc to every process on this machine. Typed into grdctl
directly it never passes through Panama, and a contract now fails if it
ever appears on a command line.

Color stays with GNOME, and not for lack of effort either. colord runs
here with seven profiles and zero devices registered, because the
daemons that register displays do not run under this session, and
Hyprland exposes no ICC, gamma, or color-management option at all. A
Color page could import a profile, attach it to nothing, and change
nothing -- the same failure refused for rollback and printer drivers.

Claude-Session: https://claude.ai/code/session_01BRvzt4H8XXLPVH5MyYdk9L

config/dot/quickshell/modules/settings/AccessibilityPage.qml

@@ -27,7 +27,12 @@ SettingsPage {
         title: "Text"
         subtitle: "Scales text in applications. The shell's own panels are drawn at their design size, so they are unaffected."
 
-        SliderRow { setting: "textScale"; divider: false }
+        SliderRow { setting: "textScale" }
+        // Reaches GTK4 applications through the desktop portal, which
+        // republishes it as org.freedesktop.appearance contrast. No
+        // high-contrast theme is involved, and none is installed here -- older
+        // GTK3 applications will not change.
+        ToggleRow { setting: "highContrast"; divider: false }
     }
 
     SettingsCard {

config/dot/quickshell/modules/settings/SharingPage.qml

@@ -114,14 +114,49 @@ SettingsPage {
             value: String(Sharing.remoteDesktop?.port ?? "")
         }
 
-        TextRow {
+        SwitchRow {
+            visible: Sharing.remoteDesktop?.available === true
+            label: "View only"
+            detail: "Let someone watch this desktop without controlling the pointer or keyboard"
+            checked: Sharing.remoteDesktop?.viewOnly === true
+            enabled: !Sharing.busy
+            onToggled: value => Sharing.setRdpViewOnly(value)
+        }
+
+        TextFieldRow {
+            visible: Sharing.remoteDesktop?.available === true
+            label: "Port"
+            detail: "The port other machines connect to"
+            text: String(Sharing.remoteDesktop?.port ?? "")
+            placeholder: "3389"
+            enabled: !Sharing.busy
+            onAccepted: value => Sharing.setRdpPort(value)
+        }
+
+        // The password is typed into gnome-remote-desktop's own tool in a
+        // terminal, never into this page. grdctl prompts for it on a terminal
+        // and crashes without one, and passing it as an argument would publish
+        // it through /proc to every process on this machine.
+        ActionRow {
             visible: Sharing.remoteDesktop?.available === true
             label: "Credentials"
             detail: Sharing.remoteDesktop?.hasCredentials === true
-                ? "Stored in the login keyring, where Privacy & Security can manage them"
-                : "None stored yet"
-            value: Sharing.remoteDesktop?.hasCredentials === true ? "Stored" : "Not set"
+                ? "Stored in the login keyring · setting new ones opens a terminal to type into"
+                : "None stored yet · remote desktop cannot be turned on without them"
+            action: "Set…"
+            enabled: !Sharing.busy
+            onTriggered: Sharing.setRdpCredentials(Quickshell.env("USER") || "")
+        }
+
+        ActionRow {
+            visible: Sharing.remoteDesktop?.available === true
+                && Sharing.remoteDesktop?.hasCredentials === true
+            label: "Forget the stored credentials"
+            detail: "Remote desktop cannot be turned on again until new ones are set"
+            action: "Clear"
+            enabled: !Sharing.busy
             divider: false
+            onTriggered: Sharing.clearRdpCredentials()
         }
     }