feat: add re-import from system buttons for Samba and NFS

Add 'Re-importar del sistema' buttons to the Samba and NFS pages,
mirroring the existing user import flow. Both buttons show a confirm
dialog before calling the respective /api/import/{samba,nfs} endpoints
which replace the DB table with the current system config.

Version bump: 0.6.0 → 0.6.1

Makefile

@@ -1,5 +1,5 @@
 BINARY=nasctl
-VERSION?=0.6.0
+VERSION?=0.6.1
 GO?=go
 LDFLAGS=-s -w -X github.com/darroyo/nasctl/internal/web.Version=$(VERSION) -X github.com/darroyo/nasctl/internal/web.Commit=$(shell git rev-parse --short HEAD 2>/dev/null || echo unknown)
 BUILD_FLAGS=CGO_ENABLED=0

web/src/api.ts

@@ -215,6 +215,8 @@ export const api = {
   deleteWatchedMount: (id: number) => request<void>("DELETE", `/system/watched-mounts/${id}`),
 
   // import
+  importSamba: () => request<{ imported: number; message?: string }>("POST", "/import/samba"),
+  importNfs:   () => request<{ imported: number; message?: string }>("POST", "/import/nfs"),
   importUsers: () => request<{ imported: number; message?: string }>("POST", "/import/users"),
 
   // files

web/src/pages/Nfs.tsx

@@ -150,10 +150,25 @@ export default function Nfs() {
     <div className="space-y-6">
       <div className="flex items-center justify-between">
         <h1 className="text-2xl font-bold text-white">Exports NFS</h1>
+        <div className="flex gap-2">
+          <button className="btn-ghost" onClick={async () => {
+            if (!confirm("Esto reemplazará todos los exports configurados con el contenido actual de /etc/exports. ¿Continuar?")) return;
+            try {
+              const res = await api.importNfs();
+              await load();
+              await refresh();
+              alert(`Importados ${res.imported} exports desde /etc/exports. Revisa y aplica los cambios.`);
+            } catch (err) {
+              alert(err instanceof Error ? err.message : "Error al importar");
+            }
+          }}>
+            Re-importar del sistema
+          </button>
           <button className="btn-primary" onClick={openNew}>
             Nuevo export
           </button>
         </div>
+      </div>
 
       <div className="card overflow-x-auto p-0">
         <table className="w-full text-left text-sm">

web/src/pages/Samba.tsx

@@ -133,6 +133,19 @@ export default function Samba() {
     <div className="space-y-6">
       <div className="flex items-center justify-between">
         <h1 className="text-2xl font-bold text-white">Shares SMB / Samba</h1>
+          <button className="btn-ghost" onClick={async () => {
+            if (!confirm("Esto reemplazará todos los shares configurados con el contenido actual de smb.conf. ¿Continuar?")) return;
+            try {
+              const res = await api.importSamba();
+              await load();
+              await refresh();
+              alert(`Importados ${res.imported} shares desde smb.conf. Revisa y aplica los cambios.`);
+            } catch (err) {
+              alert(err instanceof Error ? err.message : "Error al importar");
+            }
+          }}>
+            Re-importar del sistema
+          </button>
           <button className="btn-primary" onClick={() => openEditor(null)}>
             Nuevo share
           </button>