feat(macos): add native menu bar app with notch overlay

Introduces a SwiftUI companion app for the Fail Well PWA: menu bar
status item, popover with task list / record / history views, command
palette, and a Dynamic Island-style notch overlay that shows the active
step and timer beside the hardware notch and expands on hover to reveal
pause/next controls.

macos/Makefile

@@ -0,0 +1,38 @@
+APP_NAME := FailWell
+BUNDLE   := $(APP_NAME).app
+CONFIG   := release
+BIN_DIR  := .build/$(CONFIG)
+BIN      := $(BIN_DIR)/$(APP_NAME)
+
+.PHONY: build release app run debug test clean
+
+build:
+	swift build
+
+release:
+	swift build -c release
+
+app: release
+	@rm -rf $(BUNDLE)
+	@mkdir -p $(BUNDLE)/Contents/MacOS $(BUNDLE)/Contents/Resources
+	@cp $(BIN) $(BUNDLE)/Contents/MacOS/$(APP_NAME)
+	@cp Info.plist $(BUNDLE)/Contents/Info.plist
+	@codesign --force --deep --sign - $(BUNDLE) 2>/dev/null || true
+	@echo "Built $(BUNDLE)"
+
+run: app
+	@open $(BUNDLE)
+
+debug: build
+	@rm -rf $(BUNDLE)
+	@mkdir -p $(BUNDLE)/Contents/MacOS $(BUNDLE)/Contents/Resources
+	@cp .build/debug/$(APP_NAME) $(BUNDLE)/Contents/MacOS/$(APP_NAME)
+	@cp Info.plist $(BUNDLE)/Contents/Info.plist
+	@codesign --force --deep --sign - $(BUNDLE) 2>/dev/null || true
+	@open $(BUNDLE)
+
+test:
+	swift test
+
+clean:
+	@rm -rf .build $(BUNDLE)