fix: regenerate code for updated jni dependency, fix code generators

- Fix errcheck and ST1005 lint errors in mcp/auth.go, mcp/server_test.go,
  cmd/jnimcp/main.go
- Fix protogen: unify service eligibility check (IsServiceEligible) used
  by both protogen and grpcgen (single source of truth)
- Fix protogen: merge ProtoData from multiple specs targeting the same
  package instead of overwriting
- Fix grpcgen: generate service-specific client types (ManagerClient,
  WindowManagerClient) instead of conflicting generic Client
- Fix grpcgen: merge server/client data per package to handle multi-spec
  packages correctly
- Fix grpcgen: support per-service jni imports in server template for
  packages where services come from different jni Go packages
- Fix grpcgen: deduplicate composite entries and use package-prefixed
  field names in composite client to avoid collisions
- Fix Makefile: clean stale generated files before regenerating
- Fix .gitignore: anchor jnicli/jnimcp patterns to repo root
- Update mcp/tools_workflow.go for renamed client API

Author: xaionaro@dx.center

.gitignore

@@ -6,6 +6,6 @@ cover.out
 examples/test_results/
 go.work
 go.work.sum
-jnicli
-jnimcp
+/jnicli
+/jnimcp
 build/

Makefile

@@ -30,13 +30,25 @@ protoc: proto
 			--go-grpc_out=. --go-grpc_opt=paths=source_relative \
 			"$$dir$$pkg.proto"; \
 	done
+	@# Remove stale _grpc.pb.go files for protos that no longer define a service.
+	@for dir in proto/*/; do \
+		pkg=$$(basename "$$dir"); \
+		grpc_file="$${dir}$${pkg}_grpc.pb.go"; \
+		if [ -f "$$grpc_file" ] && ! grep -q 'service ' "$${dir}$${pkg}.proto"; then \
+			echo "removing stale $$grpc_file"; \
+			rm "$$grpc_file"; \
+		fi; \
+	done
 
 # Run grpcgen — generates gRPC server and client wrappers
 grpc: protoc
+	@rm -rf grpc/client/
+	@find grpc/server/ -name 'server.go' -exec grep -l 'Code generated by grpcgen' {} \; -exec rm {} \; 2>/dev/null || true
 	go run ./tools/cmd/grpcgen/ -specs $(JNI_DIR)/spec/java/ -overlays $(JNI_DIR)/spec/overlays/java/ -output . -go-module github.com/AndroidGoLab/jni-proxy -jni-module github.com/AndroidGoLab/jni
 
 # Run cligen — generates jnicli cobra commands from Java API specs
 cli: grpc
+	@grep -rl 'Code generated by cligen' cmd/jnicli/ 2>/dev/null | xargs rm -f
 	go run ./tools/cmd/cligen/ -specs $(JNI_DIR)/spec/java/ -overlays $(JNI_DIR)/spec/overlays/java/ -output cmd/jnicli/ -go-module github.com/AndroidGoLab/jni-proxy
 
 # Run only tool tests (no JDK needed)