chore: add hooks target and 30s test timeout to Makefile

Add missing fmt-check to .PHONY, add hooks target for pre-commit
hook installation, and add 30-second timeout to test target per
repo policy.

Makefile

@@ -1,4 +1,4 @@
-.PHONY: check lint test fmt build clean docker docker-test devserver devserver-stop
+.PHONY: check lint test fmt fmt-check build clean docker docker-test devserver devserver-stop hooks
 
 VERSION := $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
 LDFLAGS := -X main.Version=$(VERSION)
@@ -21,10 +21,10 @@ lint:
 	@echo "Running linter..."
 	golangci-lint run
 
-# Run tests
+# Run tests (30-second timeout)
 test:
 	@echo "Running tests..."
-	go test -v ./...
+	go test -timeout 30s -v ./...
 
 # Build the binary
 build: ./bin/pixad
@@ -58,3 +58,10 @@ devserver: docker devserver-stop
 devserver-stop:
 	-docker stop pixad-dev 2>/dev/null
 	-docker rm pixad-dev 2>/dev/null
+
+# Install pre-commit hook
+hooks:
+	@printf '#!/bin/sh\nset -e\n' > .git/hooks/pre-commit
+	@printf 'go mod tidy\ngo fmt ./...\ngit diff --exit-code -- go.mod go.sum || { echo "go mod tidy changed files; please stage and retry"; exit 1; }\n' >> .git/hooks/pre-commit
+	@printf 'make check\n' >> .git/hooks/pre-commit
+	@chmod +x .git/hooks/pre-commit