refactor: 重写 Git hooks 体系，委托已有检查、新增模板与 LFS 校验

pre-commit 代码检查改为委托 _backend-lint / _versionctl-lint / _frontend-check，新增 LFS 指针校验；commit-msg 新增多行空行格式校验和模板注释忽略，移除 CJK/Python 字符集检测；新增 prepare-commit-msg 提交信息模板；hooks-install 增加 source 文件存在性校验；前端 check 补入 tsc -b 类型检查并修复暴露的类型错误

Makefile

@@ -70,15 +70,21 @@ clean: _backend-clean _frontend-clean _desktop-clean
 hooks-install:
 	@hooks_dir=$$(git rev-parse --git-path hooks); \
 	mkdir -p "$$hooks_dir"; \
-	cp scripts/git-hooks/pre-commit "$$hooks_dir/pre-commit"; \
-	cp scripts/git-hooks/commit-msg "$$hooks_dir/commit-msg"; \
-	chmod +x "$$hooks_dir/pre-commit" "$$hooks_dir/commit-msg"; \
+	for hook in pre-commit commit-msg prepare-commit-msg; do \
+		src="scripts/git-hooks/$$hook"; \
+		if [ ! -f "$$src" ]; then \
+			printf 'ERROR: source hook not found: %s\n' "$$src" >&2; \
+			exit 1; \
+		fi; \
+		cp "$$src" "$$hooks_dir/$$hook"; \
+		chmod +x "$$hooks_dir/$$hook"; \
+	done; \
 	printf 'Installed Git hooks to %s\n' "$$hooks_dir"
 
 hooks-check:
 	@hooks_dir=$$(git rev-parse --git-path hooks); \
 	status=0; \
-	for hook in pre-commit commit-msg; do \
+	for hook in pre-commit commit-msg prepare-commit-msg; do \
 		if [ -x "$$hooks_dir/$$hook" ]; then \
 			printf 'OK: %s\n' "$$hook"; \
 		else \
@@ -92,17 +98,18 @@ hooks-test:
 	@scripts/git-hooks/test-hooks.sh
 
 _hooks-pre-commit:
-	@set -e; \
+	@set -ef; \
 	staged_files=$$(git diff --cached --name-only --diff-filter=ACM); \
 	if [ -z "$$staged_files" ]; then \
 		printf 'No staged files to check\n'; \
 		exit 0; \
 	fi; \
-	backend_pkgs=''; \
-	versionctl_pkgs=''; \
+	run_backend_lint=; \
+	run_versionctl_lint=; \
+	run_frontend_check=; \
+	lfs_patterns=$$(grep 'filter=lfs' .gitattributes 2>/dev/null | awk '{print $$1}' || true); \
 	for file in $$staged_files; do \
 		[ -n "$$file" ] || continue; \
-		case "$$file" in scripts/git-hooks/*) continue ;; esac; \
 		if git show ":$$file" 2>/dev/null | grep -Eq '^(<<<<<<<|=======|>>>>>>>)'; then \
 			printf 'Found conflict markers in staged file: %s\n' "$$file" >&2; \
 			printf 'Resolve conflict markers before committing.\n' >&2; \
@@ -114,37 +121,41 @@ _hooks-pre-commit:
 				printf 'Warning: large staged text file (%s bytes): %s\n' "$$size" "$$file" >&2; \
 			fi; \
 		fi; \
+		if [ -n "$$lfs_patterns" ]; then \
+			for lfs_pat in $$lfs_patterns; do \
+				case "$$file" in $$lfs_pat) \
+					content=$$(git show ":$$file" 2>/dev/null | head -1); \
+					case "$$content" in \
+						"version https://git-lfs.github.com/spec/v1"*) ;; \
+						*) \
+							printf 'LFS-tracked file not using LFS pointer: %s\n' "$$file" >&2; \
+							printf 'Run "git lfs install" and re-add this file.\n' >&2; \
+							exit 1; \
+							;; \
+					esac; \
+					break; \
+					;; \
+				esac; \
+			done; \
+		fi; \
 		case "$$file" in \
-			backend/*.go) \
-				dir=$$(dirname "$${file#backend/}"); \
-				case " $$backend_pkgs " in *" $$dir "*) ;; *) backend_pkgs="$$backend_pkgs $$dir" ;; esac; \
-				;; \
-			versionctl/*.go) \
-				dir=$$(dirname "$${file#versionctl/}"); \
-				case " $$versionctl_pkgs " in *" $$dir "*) ;; *) versionctl_pkgs="$$versionctl_pkgs $$dir" ;; esac; \
-				;; \
-			frontend/*.ts|frontend/*.tsx) \
-				rel=$${file#frontend/}; \
-				printf 'Frontend lint: frontend/%s\n' "$$rel"; \
-				(cd frontend && bunx eslint "$$rel"); \
-				printf 'Frontend format: frontend/%s\n' "$$rel"; \
-				(cd frontend && bunx prettier --check "$$rel"); \
-				;; \
-			frontend/*.scss) \
-				rel=$${file#frontend/}; \
-				printf 'Frontend format: frontend/%s\n' "$$rel"; \
-				(cd frontend && bunx prettier --check "$$rel"); \
-				;; \
+			backend/*.go) run_backend_lint=1 ;; \
+			versionctl/*.go) run_versionctl_lint=1 ;; \
+			frontend/*.ts|frontend/*.tsx|frontend/*.scss) run_frontend_check=1 ;; \
 		esac; \
 	done; \
-	for dir in $$backend_pkgs; do \
-		printf 'Go lint: backend/%s\n' "$$dir"; \
-		(cd backend && go tool golangci-lint run "$$dir/"); \
-	done; \
-	for dir in $$versionctl_pkgs; do \
-		printf 'Go lint: versionctl/%s\n' "$$dir"; \
-		(cd versionctl && go tool golangci-lint run "$$dir/"); \
-	done; \
+	if [ -n "$$run_backend_lint" ]; then \
+		printf 'Running backend lint...\n'; \
+		$(MAKE) _backend-lint; \
+	fi; \
+	if [ -n "$$run_versionctl_lint" ]; then \
+		printf 'Running versionctl lint...\n'; \
+		$(MAKE) _versionctl-lint; \
+	fi; \
+	if [ -n "$$run_frontend_check" ]; then \
+		printf 'Running frontend check...\n'; \
+		$(MAKE) _frontend-check; \
+	fi; \
 	printf 'Pre-commit checks passed\n'
 
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