feat: include app version in sidebar footer

internal/middleware/app_version.go

@@ -0,0 +1,16 @@
+package middleware
+
+import (
+	"net/http"
+
+	"git.juancwu.dev/juancwu/budgit/internal/ctxkeys"
+)
+
+func AppVersion(version string) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			ctx := ctxkeys.WithAppVersion(r.Context(), version)
+			next.ServeHTTP(w, r.WithContext(ctx))
+		})
+	}
+}