Rebuild Displays around the canvas, and let the transaction keep color

Claude-Session: https://claude.ai/code/session_01Ms2FbjQy31TVf3CEvQhGM8

config/dot/quickshell/config/PreferenceSchema.qml

@@ -1583,16 +1583,16 @@ Singleton {
         },
 
         // ── Display configuration ───────────────────────────────────────────
-        // { "<output>": { mode, scale, transform, x, y, primary } }, applied by
-        // hypr/monitors.lua on top of the shipped values. Color management and
-        // bit depth are deliberately not here: those carry a documented
-        // screencopy tradeoff that a settings page cannot explain at the moment
-        // you would be changing it.
+        // { "<output>": { mode, scale, transform, x, y, primary, vrrMode,
+        // colorProfile, bitdepth, sdrBrightness, sdrSaturation, mirrorOf } },
+        // applied by hypr/monitors.lua on top of the shipped values. Everything
+        // past `primary` is optional, so records written before those fields
+        // existed still load and the shipped defaults stand for them.
         {
             key: "displays", type: "json", def: ({}), group: "display",
             internal: true,
             label: "Display configuration",
-            detail: "Resolution, scale, rotation, position, and primary display"
+            detail: "Resolution, scale, rotation, position, primary display, color, VRR override, and mirroring"
         },
 
         // ── Per-application notification rules ──────────────────────────────