logiguard fork v3: full patch set on verified 8c74db0 tree

Includes prior-session patches (carry forward so the app compiles):
  - crates/gpui/build.rs: cross-compile manifest fix
  - crates/gpui/src/platform.rs: PlatformWindow::activate_with_token trait method
  - crates/gpui/src/window.rs: Window::activate_with_token public API
  - crates/gpui_linux/src/linux/wayland/window.rs: WaylandWindow::activate_with_token + activate() keyboard-serial fix

Plus the focus-serial fix:
  - serial.rs: SerialKind::KeyboardEnter
  - client.rs: store wl_keyboard.enter serial; latest_serial_of()

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

nix/modules/partitions.nix

@@ -0,0 +1,25 @@
+{ inputs, ... }:
+{
+  imports = [
+    inputs.flake-parts.flakeModules.partitions
+  ];
+
+  partitionedAttrs = {
+    devShells = "dev";
+    formatter = "dev";
+    checks = "dev";
+  };
+
+  partitions.dev = {
+    extraInputsFlake = ../dev;
+    module =
+      { inputs, ... }:
+      {
+        imports = [
+          inputs.treefmt-nix.flakeModule
+          ./devshells.nix
+          ./treefmt.nix
+        ];
+      };
+  };
+}