build: make kill-daemon/install/reinstall — daemon survives reinstall

Rebuilding the .app never replaced the RUNNING daemon (it outlives the GUI),
so a stale spaceshd kept serving old code (e.g. the pre-TERM-fix daemon).
`make install` now stops the daemon, copies the fresh bundle to /Applications,
and clears quarantine; `make reinstall` does dmg+install in one shot.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Makefile

@@ -8,6 +8,8 @@ NATIVE_DMG_DIR  := $(APP_DIR)/src-tauri/target/release/bundle/dmg
 NATIVE_TRIPLE   := $(shell rustc -vV 2>/dev/null | awk '/^host:/{print $$2}')
 SIDECAR_DIR     := $(APP_DIR)/src-tauri/bin
 BUNDLE_CONFIG   := src-tauri/tauri.bundle.conf.json
+APP_BUNDLE      := $(APP_DIR)/src-tauri/target/$(TAURI_TARGET)/release/bundle/macos/spacesh.app
+NATIVE_APP_BUNDLE := $(APP_DIR)/src-tauri/target/release/bundle/macos/spacesh.app
 APP_VERSION     := $(shell node -p "require('./$(APP_DIR)/src-tauri/tauri.conf.json').version" 2>/dev/null || echo 0.0.0)
 
 LANDING_IMAGE   := spacesh-landing
@@ -62,6 +64,21 @@ dev: ## run the app in dev mode (tauri dev)
 daemon: ## build & run the daemon
 	cargo run -p spaceshd
 
+.PHONY: kill-daemon
+kill-daemon: ## stop a running spaceshd so a freshly-built one takes over
+	-pkill -x spaceshd
+	-rm -f $$HOME/.spacesh/sock
+
+.PHONY: install
+install: kill-daemon ## copy the built .app to /Applications, restart daemon, clear quarantine
+	rm -rf /Applications/spacesh.app
+	cp -R "$(APP_BUNDLE)" /Applications/ 2>/dev/null || cp -R "$(NATIVE_APP_BUNDLE)" /Applications/
+	xattr -dr com.apple.quarantine /Applications/spacesh.app
+	@echo "Installed. The bundled daemon (with the latest code) starts on next launch."
+
+.PHONY: reinstall
+reinstall: dmg install ## universal rebuild + reinstall + restart daemon (one shot)
+
 # ---- Tests ----
 
 .PHONY: test