fix(preview): Symphonia format sniff and ranged stream startup (#1006)

* fix(preview): Symphonia format sniff and cluster member stream URLs

Resolve preview container hints from HTTP headers, Subsonic suffix, and
magic-byte sniff after Symphonia 0.6. Route preview streams through
clusterBrowseServerId like main playback; guard CoverArtImage when the
preview cover ref is still loading.

* fix(preview): adapt Symphonia sniff branch for main without cluster routing

Keep formatSuffix and cover-ref guards from the cluster work; use
buildStreamUrl on the active server instead of clusterBrowseServerId.

* fix(preview): use ranged HTTP so preview starts without full-file download

Open preview via RangedHttpSource when the server supports byte ranges;
fall back to buffered download otherwise. Gate in-memory probe with
ProbeSeekGate so Symphonia 0.6 does not scan the entire file before audio.

* docs: CHANGELOG and credits for preview fix PR #1006

* chore: drop PR #1006 from settings credits (minor fix)

* fix(preview): allow clippy too_many_arguments on audio_preview_play

formatSuffix pushed the Tauri command to 8 args; matches other IPC commands.

src/cover/CoverArtImage.tsx

@@ -13,7 +13,7 @@ import { useCoverArt } from './useCoverArt';
 import type { CoverArtRef, CoverPrefetchPriority, CoverSurfaceKind } from './types';
 
 export type CoverArtImageProps = {
-  coverRef: CoverArtRef;
+  coverRef: CoverArtRef | null | undefined;
   displayCssPx: number;
   surface?: CoverSurfaceKind;
   fullRes?: boolean;
@@ -39,6 +39,18 @@ export function CoverArtImage({
   onError: restOnError,
   ...rest
 }: CoverArtImageProps) {
+  if (!coverRef) {
+    return (
+      <div
+        className={className}
+        data-cover-provisional="true"
+        role="img"
+        aria-label={alt ?? ''}
+        {...(rest as React.HTMLAttributes<HTMLDivElement>)}
+      />
+    );
+  }
+
   const pinnedHigh = ensurePriorityProp === 'high';
   const [ensurePriority, setEnsurePriority] = useState<CoverPrefetchPriority>(
     ensurePriorityProp ?? 'middle',