kayla: drop Discover for Bazaar+flatpak, pin Breeze Dark palette, unmanage Chrome

hosts/FredOS-Kayla.nix

@@ -11,15 +11,50 @@
     };
     services.desktopManager.plasma6.enable = true;
 
-    # Dark mode: stylix (imported for every host by mkHost, polarity = "dark",
-    # autoEnable = true) drives its `kde` target off the HM user below, which
-    # writes kdeglobals + the Breeze colour scheme. No manual Plasma theming.
+    # Discover is a package manager for a machine that has one already, and it
+    # can't install anything here. Bazaar + Flatpak covers "I want an app".
+    environment.plasma6.excludePackages = [ pkgs.kdePackages.discover ];
+    services.flatpak.enable = true;
+
+    # Dark mode: stylix's `kde` target writes kdeglobals for the HM users below.
+    # The palette is pinned to Breeze Dark rather than left to derive itself
+    # from walls/wallpaper.png — otherwise her whole desktop re-colours every
+    # time *my* wallpaper changes. Fixed values, and they're the ones KDE's own
+    # apps ship with, so Plasma looks like stock Plasma.
+    stylix.base16Scheme = {
+      scheme = "Breeze Dark";
+      author = "KDE";
+      base00 = "232629";  # view background
+      base01 = "2a2e32";
+      base02 = "31363b";  # window background / raised surface
+      base03 = "4d5157";  # borders, disabled
+      base04 = "7f8c8d";  # inactive text
+      base05 = "eff0f1";  # normal text
+      base06 = "fcfcfc";
+      base07 = "ffffff";
+      base08 = "da4453";  # red
+      base09 = "f67400";  # orange
+      base0A = "fdbc4b";  # yellow
+      base0B = "27ae60";  # green
+      base0C = "1abc9c";  # cyan
+      base0D = "3daee9";  # blue — Breeze's accent
+      base0E = "9b59b6";  # purple
+      base0F = "8e44ad";  # base16's "brown" slot; Breeze has no brown
+    };
+
+    # Stylix's chromium target is a *managed policy* (BrowserThemeColor written
+    # to /etc/opt/chrome/policies), which is what makes Chrome say "your
+    # administrator has set a default theme" and greys out the appearance
+    # controls — including "use system title bar and borders". Off, so Chrome
+    # is hers to configure.
+    stylix.targets.chromium.enable = false;
 
     environment.systemPackages = with pkgs; [
       google-chrome
       spotify
       vesktop
       faugus-launcher
+      bazaar
       mangohud
       gamescope
     ];