feat: add cycleProfile IPC command and default Mod+P keybind (#2411)

* feat: add cycleProfile IPC command for display outputs

Adds `dms ipc outputs cycleProfile` which cycles through configured display
profiles in order, wrapping around from the last back to the first.

Useful for binding to a compositor keybind (e.g. Super+P in niri/Hyprland)
without needing an external wrapper script.

* feat: add Mod+P default keybind for cycling display profiles

Binds Super+P to `dms ipc outputs cycleProfile` in both the niri and
Hyprland default keybind configs. Mod+Shift+P is already reserved for
powering off monitors on both compositors, so Mod+P is a natural fit.

core/internal/config/embedded/hypr-binds.conf

@@ -158,5 +158,8 @@ bind = , Print, exec, dms screenshot
 bind = CTRL, Print, exec, dms screenshot full
 bind = ALT, Print, exec, dms screenshot window
 
+# === Display Profiles ===
+bind = SUPER, P, exec, dms ipc outputs cycleProfile
+
 # === System Controls ===
 bind = SUPER SHIFT, P, dpms, toggle

core/internal/config/embedded/niri-binds.kdl

@@ -215,6 +215,11 @@ binds {
     Print { screenshot; }
     Ctrl+Print { screenshot-screen; }
     Alt+Print { screenshot-window; }
+    // === Display Profiles ===
+    Mod+P hotkey-overlay-title="Cycle Display Profile" {
+        spawn "dms" "ipc" "outputs" "cycleProfile";
+    }
+
     // === System Controls ===
     Mod+Escape allow-inhibiting=false { toggle-keyboard-shortcuts-inhibit; }
     Mod+Shift+P { power-off-monitors; }

quickshell/DMSShellIPC.qml

@@ -1726,6 +1726,22 @@ Item {
             return `PROFILE_SET_SUCCESS: ${profileName}`;
         }
 
+        function cycleProfile(): string {
+            if (SettingsData.displayProfileAutoSelect)
+                return "ERROR: Auto profile selection is enabled. Use toggleAuto first";
+
+            const profiles = DisplayConfigState.validatedProfiles;
+            const ids = Object.keys(profiles).filter(id => profiles[id].name);
+            if (ids.length === 0)
+                return "ERROR: No profiles configured";
+
+            const activeId = SettingsData.getActiveDisplayProfile(CompositorService.compositor);
+            const idx = ids.indexOf(activeId);
+            const nextId = ids[(idx + 1) % ids.length];
+            DisplayConfigState.activateProfile(nextId);
+            return `PROFILE_SET_SUCCESS: ${profiles[nextId].name}`;
+        }
+
         function toggleAuto(): string {
             SettingsData.displayProfileAutoSelect = !SettingsData.displayProfileAutoSelect;
             SettingsData.saveSettings();