fix(SearchLocal, locate-db): enhance database download progress tracking and UI feedback

src/app/components/SearchLocal.tsx

@@ -175,7 +175,7 @@ export default function SearchLocal({ config, setConfig, onClose, onOpenFolder }
   const [mountEntry, setMountEntry] = useState<SearchResult | null>(null);
   const [actionEntry, setActionEntry] = useState<SearchResult | null>(null);
   const [searchError, setSearchError] = useState<string | null>(null);
-  const [dbBytes, setDbBytes] = useState<number | null>(null);
+  const [dbProgress, setDbProgress] = useState<{ received: number; total: number | null }>({ received: 0, total: null });
   const [dbPhase, setDbPhase] = useState<'idle' | 'downloading' | 'ready'>('idle');
   const [showFilter, setShowFilter] = useState(() => _store.showFilter);
   const [filterSystem, setFilterSystem] = useState<string | null>(() => _store.filterSystem);
@@ -229,8 +229,8 @@ export default function SearchLocal({ config, setConfig, onClose, onOpenFolder }
     try {
       if (!isLocateDbLoaded()) {
         setDbPhase('downloading');
-        setDbBytes(null);
-        await openLocateDb(bytes => flushSync(() => setDbBytes(bytes)));
+        setDbProgress({ received: 0, total: null });
+        await openLocateDb(p => flushSync(() => setDbProgress(p)));
         setDbPhase('ready');
       }
       const needle = query.trim();
@@ -297,9 +297,17 @@ export default function SearchLocal({ config, setConfig, onClose, onOpenFolder }
   };
 
   const loadingLabel = dbPhase === 'downloading'
-    ? (dbBytes === null ? 'Loading database…' : `Loading database… ${humanFileSize(dbBytes)}`)
+    ? (dbProgress.received === 0
+        ? 'Loading database…'
+        : dbProgress.total === null
+          ? `Loading database… ${humanFileSize(dbProgress.received)}`
+          : `Loading database… ${humanFileSize(dbProgress.received)} / ${humanFileSize(dbProgress.total)}`)
     : 'Searching…';
 
+  const downloadPct = dbProgress.total && dbProgress.total > 0
+    ? Math.min(100, Math.round((dbProgress.received / dbProgress.total) * 100))
+    : null;
+
   const busy = isSearching || isScanning;
 
   const facets = useMemo(() => {
@@ -439,9 +447,22 @@ export default function SearchLocal({ config, setConfig, onClose, onOpenFolder }
           )}
 
           {isSearching && !hasSearched && (
-            <div className="flex flex-col items-center justify-center py-16 gap-3">
+            <div className="flex flex-col items-center justify-center py-16 gap-3 w-full px-8">
               <Loader2 className="w-8 h-8 text-blue-500 animate-spin" />
-              <p className="text-sm text-neutral-500">{loadingLabel}</p>
+              <p className="text-sm text-neutral-500 text-center">{loadingLabel}</p>
+              {dbPhase === 'downloading' && (
+                <div className="w-full max-w-xs">
+                  <div className="h-1.5 bg-neutral-200 rounded-full overflow-hidden">
+                    <div
+                      className={`h-full bg-blue-500 transition-all duration-150 ease-out ${downloadPct === null ? 'animate-pulse w-1/3' : ''}`}
+                      style={downloadPct !== null ? { width: `${downloadPct}%` } : undefined}
+                    />
+                  </div>
+                  {downloadPct !== null && (
+                    <p className="text-xs text-neutral-400 text-center mt-1.5">{downloadPct}%</p>
+                  )}
+                </div>
+              )}
             </div>
           )}
 

src/app/locate-db.ts

@@ -3,6 +3,12 @@ import { getWebDAVBaseUrl, basename, listDirectory, putFileContents, deletePath
 
 const LOCATE_PATH = '/sd/.locate';
 
+function parseContentLength(header: string | null): number | null {
+  if (!header) return null;
+  const n = Number(header);
+  return Number.isFinite(n) && n > 0 ? n : null;
+}
+
 // Memoize the module init — loading the WASM binary is expensive.
 let _sqlite3Promise: Promise<any> | null = null;
 function getSqlite3(): Promise<any> {
@@ -26,9 +32,13 @@ export function resetLocateDb(): void {
 /**
  * Fetch /sd/.locate and open it as an in-memory SQLite database.
  * Calling again when already loaded is a no-op unless you call resetLocateDb() first.
- * onProgress receives raw bytes received so far during the download.
+ * onProgress receives { received, total } for each chunk; total is the value
+ * of the Content-Length response header, or null if the server didn't send
+ * one (chunked transfer, etc.).
  */
-export async function openLocateDb(onProgress?: (bytes: number) => void): Promise<void> {
+export async function openLocateDb(
+  onProgress?: (progress: { received: number; total: number | null }) => void,
+): Promise<void> {
   if (_db) return;
 
   const sqlite3 = await getSqlite3();
@@ -37,6 +47,8 @@ export async function openLocateDb(onProgress?: (bytes: number) => void): Promis
   const response = await fetch(url);
   if (!response.ok) throw new Error(`Cannot fetch locate database: ${response.status} ${response.statusText}`);
 
+  const total = parseContentLength(response.headers.get('content-length'));
+
   // Stream the response body so onProgress gets called per chunk.
   let bytes: Uint8Array;
   if (response.body) {
@@ -48,7 +60,7 @@ export async function openLocateDb(onProgress?: (bytes: number) => void): Promis
       if (done) break;
       chunks.push(value);
       received += value.byteLength;
-      onProgress?.(received);
+      onProgress?.({ received, total });
     }
     const combined = new Uint8Array(received);
     let offset = 0;
@@ -56,6 +68,7 @@ export async function openLocateDb(onProgress?: (bytes: number) => void): Promis
     bytes = combined;
   } else {
     bytes = new Uint8Array(await response.arrayBuffer());
+    onProgress?.({ received: bytes.byteLength, total: total ?? bytes.byteLength });
   }
 
   // Allocate the bytes in WASM heap, then deserialize into a fresh in-memory DB.