Fix warnings and update tracability

src/lib/components/player/VideoPlayer.svelte

@@ -1,3 +1,4 @@
+<!-- TRACES: UR-003, UR-005, UR-020, UR-021, UR-026 | DR-010, DR-023, DR-024 -->
 <script lang="ts">
   import { onMount, onDestroy } from "svelte";
   import { invoke } from "@tauri-apps/api/core";
@@ -312,8 +313,8 @@
       console.log("[VideoPlayer] Video element configured: muted=", videoElement.muted, "volume=", videoElement.volume);
 
       // DIAGNOSTIC: Check if video has audio tracks
-      if (videoElement.audioTracks) {
-        console.log("[VideoPlayer] Audio tracks count:", videoElement.audioTracks.length);
+      if ((videoElement as any).audioTracks) {
+        console.log("[VideoPlayer] Audio tracks count:", (videoElement as any).audioTracks.length);
 
         // Set initial audio track (prefer default track)
         if (selectedAudioTrackIndex === null && audioTracks().length > 0) {
@@ -322,11 +323,11 @@
           console.log("[VideoPlayer] Selected default audio track:", selectedAudioTrackIndex);
         }
       }
-      if (videoElement.mozHasAudio !== undefined) {
-        console.log("[VideoPlayer] mozHasAudio:", videoElement.mozHasAudio);
+      if ((videoElement as any).mozHasAudio !== undefined) {
+        console.log("[VideoPlayer] mozHasAudio:", (videoElement as any).mozHasAudio);
       }
-      if (videoElement.webkitAudioDecodedByteCount !== undefined) {
-        console.log("[VideoPlayer] webkitAudioDecodedByteCount:", videoElement.webkitAudioDecodedByteCount);
+      if ((videoElement as any).webkitAudioDecodedByteCount !== undefined) {
+        console.log("[VideoPlayer] webkitAudioDecodedByteCount:", (videoElement as any).webkitAudioDecodedByteCount);
       }
     }
   });
@@ -359,7 +360,7 @@
           const subtitles = media.mediaStreams.filter(s => s.type === "Subtitle");
           for (const sub of subtitles) {
             try {
-              const url = getSubtitleUrl(sub.index);
+              const url = await getSubtitleUrl(sub.index);
               if (url) {
                 subtitleTracks.push({
                   index: sub.index,
@@ -617,7 +618,7 @@
             videoElement?.removeEventListener("seeked", onSeeked);
             resolve();
           };
-          videoElement.addEventListener("seeked", onSeeked);
+          videoElement!.addEventListener("seeked", onSeeked);
           // Fallback timeout in case seeked event doesn't fire
           setTimeout(() => {
             videoElement?.removeEventListener("seeked", onSeeked);
@@ -951,7 +952,7 @@
       target: {
         value: newTime.toString()
       }
-    } as Event;
+    } as unknown as Event;
 
     await handleSeekBarChange(syntheticEvent);
   }
@@ -1120,7 +1121,7 @@
             videoElement?.removeEventListener("canplay", onCanPlay);
             resolve();
           };
-          videoElement.addEventListener("canplay", onCanPlay);
+          videoElement!.addEventListener("canplay", onCanPlay);
 
           // Timeout fallback
           setTimeout(() => {
@@ -1214,11 +1215,11 @@
   }
 
   // Get subtitle URL for a given stream index
-  function getSubtitleUrl(streamIndex: number): string {
+  async function getSubtitleUrl(streamIndex: number): Promise<string> {
     if (!media || !mediaSourceId) return "";
     try {
       const repo = auth.getRepository();
-      return repo.getSubtitleUrl(media.id, mediaSourceId ?? "", streamIndex, "vtt");
+      return await repo.getSubtitleUrl(media.id, mediaSourceId ?? "", streamIndex, "vtt");
     } catch {
       return "";
     }