feat(completion): 自动安装 shell 补全，迁移旧配置并清理手动补全

Makefile

@@ -1,10 +1,6 @@
 ROOT_DIR := $(shell pwd)
-COMP_DIR := $(HOME)/.local/bin/completions
 PYTHON ?= python3
 
-# 手动安装的文件清单（与 bin/commands/self_mgmt.py 中的 _MANUAL_FILES 保持同步）
-MANUAL_FILES := $(COMP_DIR)/_mytoolkit $(COMP_DIR)/mytoolkit.bash
-
 .PHONY: help install uninstall sync-skill
 
 help:
@@ -12,22 +8,12 @@ help:
 	@echo ""
 	@echo "  install     Install mytoolkit in editable mode (current Python) and sync skill"
 	@echo "  sync-skill  Copy the bundled Claude skill to ~/.claude/skills/mytoolkit/"
-	@echo "  uninstall   Uninstall mytoolkit and remove completions"
+	@echo "  uninstall   Uninstall mytoolkit and remove shell completions"
 
 install:
 	$(PYTHON) -m pip install -e "$(ROOT_DIR)" --upgrade
-	@echo "Installing completions…"
-	@mkdir -p "$(COMP_DIR)"
-	@SHELL_NAME=$$(basename "$$SHELL"); \
-	if [ "$$SHELL_NAME" = "zsh" ]; then \
-		_MYTOOLKIT_COMPLETE=zsh_source mytoolkit > "$(COMP_DIR)/_mytoolkit" && \
-			echo "zsh completion: $(COMP_DIR)/_mytoolkit" || \
-			echo "Warning: zsh completion failed"; \
-	elif [ "$$SHELL_NAME" = "bash" ]; then \
-		_MYTOOLKIT_COMPLETE=bash_source mytoolkit > "$(COMP_DIR)/mytoolkit.bash" && \
-			echo "bash completion: $(COMP_DIR)/mytoolkit.bash" || \
-			echo "Warning: bash completion failed"; \
-	fi
+	@echo "Installing shell completions…"
+	@mytoolkit completion install || echo "Warning: completion install failed"
 	@$(MAKE) -s sync-skill
 
 sync-skill:
@@ -41,11 +27,4 @@ sync-skill:
 	fi
 
 uninstall:
-	$(PYTHON) -m pip uninstall mytoolkit -y
-	@for f in $(MANUAL_FILES); do \
-		if [ -e "$$f" ] || [ -L "$$f" ]; then \
-			rm -f "$$f"; \
-			echo "Removed $$f"; \
-		fi; \
-	done
-	@echo "Uninstalled mytoolkit and cleaned up manual files"
+	@mytoolkit uninstall || $(PYTHON) -m pip uninstall mytoolkit -y