chore(Makefile): restructure Makefile to add new targets and improve clarity of commands

Makefile

@@ -1,10 +1,41 @@
-all: clean format build
+# -------- Config --------
+SHELL := /bin/sh
 
-format:
-	biome format --write .
+ZOLA ?= zola
+BIOME ?= npx biome
 
-build:
-	zola build
+BUILD_DIR := public
+
+# -------- Targets --------
+.PHONY: help serve build clean format lint fix fix-unsafe check ci
+
+help: ## Show this help
+	@awk 'BEGIN{FS":.*##"; printf "\nTargets:\n"} /^[a-zA-Z0-9_.-]+:.*##/{printf "  \033[36m%-14s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST); echo
+
+serve: ## Run Zola dev server (http://127.0.0.1:1111)
+	$(ZOLA) serve
+
+build: ## Build site into ./public
+	$(ZOLA) build
+
+clean: ## Remove ./public
+	rm -rf "$(BUILD_DIR)"
+
+format: ## Format JS/JSON/CSS with Biome (no linting)
+	$(BIOME) format --write .
+
+lint: ## Lint with Biome (no writes)
+	$(BIOME) ci .
+
+fix: ## Lint+auto-fix safe changes with Biome
+	$(BIOME) check --write .
+
+fix-unsafe: ## Lint+auto-fix incl. unsafe (e.g., template literals)
+	$(BIOME) check --write --unsafe .
+
+check: ## Zola link/content checks
+	$(ZOLA) check
+
+ci: ## CI-friendly: lint (Biome) + Zola checks
+	$(BIOME) ci . && $(ZOLA) check
 
-clean:
-	rm -rf public/