logiguard fork: GPUI xdg-activation keyboard-focus serial fix

Single-commit orphan branch: full zed-industries/zed @ 8c74db0 source tree
with a 3-file patch applied (no upstream history).

Patch (crates/gpui_linux/src/linux/wayland/):
  - serial.rs: add SerialKind::KeyboardEnter
  - client.rs: store wl_keyboard.enter serial; add latest_serial_of()
  - window.rs: activate() uses keyboard-enter serial (Mutter focus gate)

Mutter honors window activation only when the token carries the keyboard-
focus serial from wl_keyboard.enter; GPUI used a stale mouse-press serial.
See docs/tray-window-focus-wayland.md in logiguard.

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

crates/debugger_ui/Cargo.toml

@@ -0,0 +1,92 @@
+[package]
+name = "debugger_ui"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/debugger_ui.rs"
+doctest = false
+
+[features]
+test-support = [
+    "dap/test-support",
+    "dap_adapters/test-support",
+    "debugger_tools/test-support",
+    "editor/test-support",
+    "gpui/test-support",
+    "project/test-support",
+    "util/test-support",
+    "workspace/test-support",
+    "unindent",
+]
+
+[dependencies]
+alacritty_terminal.workspace = true
+anyhow.workspace = true
+bitflags.workspace = true
+client.workspace = true
+collections.workspace = true
+command_palette_hooks.workspace = true
+dap.workspace = true
+dap_adapters = { workspace = true, optional = true }
+db.workspace = true
+debugger_tools.workspace = true
+editor.workspace = true
+feature_flags.workspace = true
+file_icons.workspace = true
+futures.workspace = true
+fuzzy.workspace = true
+gpui.workspace = true
+hex.workspace = true
+indoc.workspace = true
+itertools.workspace = true
+language.workspace = true
+log.workspace = true
+menu.workspace = true
+notifications.workspace = true
+parking_lot.workspace = true
+parse_int.workspace = true
+paths.workspace = true
+picker.workspace = true
+pretty_assertions.workspace = true
+project.workspace = true
+rpc.workspace = true
+schemars.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+serde_json_lenient.workspace = true
+settings.workspace = true
+sysinfo.workspace = true
+task.workspace = true
+tasks_ui.workspace = true
+terminal_view.workspace = true
+text.workspace = true
+theme.workspace = true
+theme_settings.workspace = true
+tree-sitter-json.workspace = true
+tree-sitter.workspace = true
+ui.workspace = true
+ui_input.workspace = true
+unindent = { workspace = true, optional = true }
+util.workspace = true
+workspace.workspace = true
+zed_actions.workspace = true
+
+[dev-dependencies]
+dap = { workspace = true, features = ["test-support"] }
+dap_adapters = { workspace = true, features = ["test-support"] }
+debugger_tools = { workspace = true, features = ["test-support"] }
+editor = { workspace = true, features = ["test-support"] }
+gpui = { workspace = true, features = ["test-support"] }
+language = { workspace = true, features = ["test-support"] }
+project = { workspace = true, features = ["test-support"] }
+tree-sitter-go.workspace = true
+unindent.workspace = true
+util = { workspace = true, features = ["test-support"] }
+workspace = { workspace = true, features = ["test-support"] }
+zlog.workspace = true