improve the build system

Makefile

@@ -1,12 +1,13 @@
-EMIT_ASSETS := index.html 404.html info.html \
-			   styles.css icons.css \
-			   countdown.js theme.js theme.js \
-			   stallman.webp stallman_2024.webp
+PAGES := index.html 404.html info.html
+SHARED_FILES := stallman.webp stallman_2024.webp favicon.ico \
+				moon.svg sun.svg narrow_light.svg narrow_dark.svg wide_light.svg wide_dark.svg \
+				styles.css icons.css \
+				countdown.js theme.js
 SEARCH_REPLACE := lib/search_and_replace/target/release/search_and_replace
 COMPONENTS := head.html header.html nav.html footer.html
 
 .PHONY: build
-build: $(EMIT_ASSETS:%=dst/cz/%) $(EMIT_ASSETS:%=dst/en/%) dst/favicon.ico
+build: $(PAGES:%=dst/cz/%) $(PAGES:%=dst/en/%) $(SHARED_FILES:%=dst/%)
 
 .PHONY: clean
 clean:
@@ -25,38 +26,30 @@ define make_page
 	> $(2)
 endef
 
-dst/cz/%.html: cz_%.html $(SEARCH_REPLACE) $(COMPONENTS:%=components/cz/%)
+dst/cz/%.html: pages/cz/%.html $(SEARCH_REPLACE) $(COMPONENTS:%=components/cz/%)
 	@mkdir -p $(@D)
 	$(call make_page,$<,$@,cz)
 
-dst/cz/%.css: %.css
-	@mkdir -p $(@D)
-	ln -f $< $@
-
-dst/cz/%.js: js/%.js
-	@mkdir -p $(@D)
-	ln -f $< $@
-
-dst/cz/%.webp: images/%.jpg
-	@mkdir -p $(@D)
-	magick $< $@
-
-dst/en/%.html: en_%.html $(SEARCH_REPLACE) $(COMPONENTS:%=components/en/%)
+dst/en/%.html: pages/en/%.html $(SEARCH_REPLACE) $(COMPONENTS:%=components/en/%)
 	@mkdir -p $(@D)
 	$(call make_page,$<,$@,en)
 
-dst/en/%.css: %.css
+dst/%.css: styles/%.css
 	@mkdir -p $(@D)
 	ln -f $< $@
 
-dst/en/%.js: js/%.js
+dst/%.js: scripts/%.js
 	@mkdir -p $(@D)
 	ln -f $< $@
 
-dst/en/%.webp: images/%.jpg
+dst/%.webp: images/%.jpg
 	@mkdir -p $(@D)
 	magick $< $@
 
+dst/%.svg: icons/%.svg
+	@mkdir -p $(@D)
+	ln -f $< $@
+
 dst/favicon.ico: images/favicon.ico
 	@mkdir -p $(@D)
 	ln -f $< $@