Fix podcast player stability, V4V payments, and Lightning address

- Add audio.load() reset to prevent cascading failures between episodes
- Add onPlaying event handler for reliable post-buffer playback in WebKitGTK
- Add 15s loading timeout with user-friendly error for broken audio URLs
- Fix V4V LNURL-pay: use Tauri HTTP plugin instead of CORS-blocked browser fetch
- Fix Podcast Index API: use Tauri HTTP plugin for V4V enrichment
- Fall back to Podcast Index enclosure URL when Fountain.fm CDN is broken
- Update Lightning address to jure@getalby.com (Alby cloud migration)
- Add broad HTTPS scope for LNURL-pay across Lightning providers

src/lib/podcast/fountainFm.ts

@@ -69,7 +69,12 @@ export async function resolveFountainEpisode(url: string): Promise<PodcastEpisod
     };
 
     // Try to enrich with V4V data from Podcast Index (non-blocking)
-    const enriched = await enrichWithV4V(episode);
+    let enriched = episode;
+    try {
+      enriched = await enrichWithV4V(episode);
+    } catch {
+      // V4V enrichment failed — use episode as-is
+    }
 
     cache[url] = enriched;
     saveCache(cache);

src/lib/podcast/podcastIndexV4V.ts

@@ -1,3 +1,4 @@
+import { fetch } from "@tauri-apps/plugin-http";
 import type { PodcastEpisode, V4VRecipient } from "../../types/podcast";
 
 const API_KEY = "VKWWTGY25NVCKYJWHSNY";
@@ -89,7 +90,14 @@ export async function enrichWithV4V(episode: PodcastEpisode): Promise<PodcastEpi
     const value = extractV4V(valueSource.value as Record<string, unknown> | undefined);
     if (value.length === 0) return episode;
 
-    return { ...episode, value };
+    // If Fountain's audio URL is on their broken CDN, use Podcast Index's real enclosure URL
+    let { enclosureUrl } = episode;
+    if (match && enclosureUrl.includes("feeds.fountain.fm")) {
+      const piUrl = match.enclosureUrl as string | undefined;
+      if (piUrl) enclosureUrl = piUrl;
+    }
+
+    return { ...episode, value, enclosureUrl };
   } catch {
     return episode;
   }

src/lib/podcast/v4v.ts

@@ -1,3 +1,4 @@
+import { fetch } from "@tauri-apps/plugin-http";
 import type { PodcastEpisode, V4VRecipient } from "../../types/podcast";
 import { payInvoiceViaNWC } from "../lightning/nwc";