feat(builder): Android/iOS 构建与 copy_artifact 发布

新增 APK/IPA 轨道和 copy_artifact.sh（本地目录或 container:/dir）。
push 必须委托该脚本，禁止在 makefile 里内联 docker cp。

skills/builder/templates/env.builder

@@ -11,3 +11,5 @@
 # DOCKER_REPOSITORY=
 # IMAGE_TAG=
 # PLATFORMS=          # optional override; project ARCHES lives in makefile.builder
+# COPY_DEST=          # local dir, or docker dest container:/absolute/dir
+# COPY_AS=            # optional extra basenames for the first file

skills/builder/templates/makefile.android.builder

@@ -0,0 +1,57 @@
+# Builder 契约文件。放到项目根，用 `make -f makefile.builder <target>`。
+# Android 轨道：build 产出 dist/<name>_<version>_<arch>.apk，push 走 copy_artifact.sh。
+# ARCHES 是构建机 ISA；APK 可含多 ABI。不要把这些目标写进用户 Makefile。
+
+ARCHES ?= amd64
+ARCH ?= $(firstword $(ARCHES))
+ifeq ($(strip $(ARCHES)),)
+$(error ARCHES must not be empty)
+endif
+ifneq ($(filter-out amd64 arm64,$(ARCHES)),)
+$(error ARCHES entries must be amd64 or arm64)
+endif
+ifneq ($(filter $(ARCH),$(ARCHES)),$(ARCH))
+$(error ARCH must be one of: $(ARCHES))
+endif
+
+PROJECT_NAME ?= $(notdir $(CURDIR))
+DIST_DIR ?= dist
+
+ifneq ($(BUILDER_SKILL_DIR),)
+  include $(BUILDER_SKILL_DIR)/scripts/version.mk
+else
+  include $(HOME)/.pouch/skills/builder/scripts/version.mk
+endif
+
+BUILDER_SCRIPTS := $(or $(BUILDER_SKILL_DIR),$(HOME)/.pouch/skills/builder)/scripts
+APK_OUT := $(DIST_DIR)/$(PROJECT_NAME)_$(VERSION)_$(ARCH).apk
+
+.PHONY: help version arches clean build android push
+
+help:
+	@echo "$(PROJECT_NAME) $(VERSION)"
+	@echo "  ARCHES=$(ARCHES)  ARCH=$(ARCH)"
+	@echo "  make -f makefile.builder build [ARCH=amd64|arm64]  - 构建 Release APK"
+	@echo "  make -f makefile.builder version                   - 打印规范版本"
+	@echo "  make -f makefile.builder arches                    - 打印架构清单"
+	@echo "  make -f makefile.builder clean                     - 删除 $(DIST_DIR)"
+	@echo "  make -f makefile.builder push                      - copy_artifact.sh 拷到 COPY_DEST"
+
+version:
+	@echo $(VERSION)
+
+arches:
+	@echo $(ARCHES)
+
+clean:
+	rm -rf $(DIST_DIR)
+
+# 替换为项目真实 assemble 命令，且必须使用 $(ARCH)。不得 curl/scp/docker cp。
+build:
+	mkdir -p $(DIST_DIR)
+	cp app-release.apk $(APK_OUT)
+
+android: build
+
+push:
+	$(BUILDER_SCRIPTS)/copy_artifact.sh $(APK_OUT)

skills/builder/templates/makefile.ios.builder

@@ -0,0 +1,57 @@
+# Builder 契约文件。放到项目根，用 `make -f makefile.builder <target>`。
+# iOS 轨道：build 产出 dist/<name>_<version>_<arch>.ipa，push 走 copy_artifact.sh。
+# ARCHES 是构建机 ISA。不要把这些目标写进用户 Makefile。
+
+ARCHES ?= arm64
+ARCH ?= $(firstword $(ARCHES))
+ifeq ($(strip $(ARCHES)),)
+$(error ARCHES must not be empty)
+endif
+ifneq ($(filter-out amd64 arm64,$(ARCHES)),)
+$(error ARCHES entries must be amd64 or arm64)
+endif
+ifneq ($(filter $(ARCH),$(ARCHES)),$(ARCH))
+$(error ARCH must be one of: $(ARCHES))
+endif
+
+PROJECT_NAME ?= $(notdir $(CURDIR))
+DIST_DIR ?= dist
+
+ifneq ($(BUILDER_SKILL_DIR),)
+  include $(BUILDER_SKILL_DIR)/scripts/version.mk
+else
+  include $(HOME)/.pouch/skills/builder/scripts/version.mk
+endif
+
+BUILDER_SCRIPTS := $(or $(BUILDER_SKILL_DIR),$(HOME)/.pouch/skills/builder)/scripts
+IPA_OUT := $(DIST_DIR)/$(PROJECT_NAME)_$(VERSION)_$(ARCH).ipa
+
+.PHONY: help version arches clean build ios push
+
+help:
+	@echo "$(PROJECT_NAME) $(VERSION)"
+	@echo "  ARCHES=$(ARCHES)  ARCH=$(ARCH)"
+	@echo "  make -f makefile.builder build [ARCH=amd64|arm64]  - 构建 IPA"
+	@echo "  make -f makefile.builder version                   - 打印规范版本"
+	@echo "  make -f makefile.builder arches                    - 打印架构清单"
+	@echo "  make -f makefile.builder clean                     - 删除 $(DIST_DIR)"
+	@echo "  make -f makefile.builder push                      - copy_artifact.sh 拷到 COPY_DEST"
+
+version:
+	@echo $(VERSION)
+
+arches:
+	@echo $(ARCHES)
+
+clean:
+	rm -rf $(DIST_DIR)
+
+# 替换为项目真实 xcodebuild/export 命令，且必须使用 $(ARCH)。不得 curl/scp/docker cp。
+build:
+	mkdir -p $(DIST_DIR)
+	cp app.ipa $(IPA_OUT)
+
+ios: build
+
+push:
+	$(BUILDER_SCRIPTS)/copy_artifact.sh $(IPA_OUT)