add middlewares, handlers and database models

internal/middleware/config.go

@@ -0,0 +1,19 @@
+package middleware
+
+import (
+	"net/http"
+
+	"git.juancwu.dev/juancwu/budgething/internal/config"
+	"git.juancwu.dev/juancwu/budgething/internal/ctxkeys"
+)
+
+// Config middleware adds the sanitized app configuration to the request context.
+// Sensitive values like JWTSecret and DBPath are excluded for security.
+func Config(cfg *config.Config) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			ctx := ctxkeys.WithConfig(r.Context(), cfg.Sanitized())
+			next.ServeHTTP(w, r.WithContext(ctx))
+		})
+	}
+}