feat(storage): rename snapraid_content to snapraid_conf; clarify conf vs content file; add auto-detect and conf viewer

web/src/api.ts

@@ -170,7 +170,7 @@ export interface StorageConfig {
   mover_inplace: boolean;
   mover_rsync_options: string;
   mover_warning_threshold: number;
-  snapraid_content: string;
+  snapraid_conf: string;
   snapraid_data_dirs: string;
   snapraid_parity_dir: string;
   snapraid_scrub_plan: number;
@@ -322,6 +322,10 @@ export const api = {
     request<StorageJob>("POST", "/storage/jobs", { kind, args }),
   cancelStorageJob: (id: number) => request<{ ok: boolean }>("POST", `/storage/jobs/${id}/cancel`),
   storageJobStreamUrl: (id: number) => `/api/storage/jobs/${id}/stream`,
+  getStorageConfFile: () => fetch(`/api/storage/conf-file`).then(r => {
+    if (!r.ok) throw new Error(`HTTP ${r.status}: ${r.statusText}`);
+    return r.text();
+  }),
 };
 
 export function formatBytes(bytes: number): string {