fix: rename hls.min.js -> hls.js to match vite build output

The vite config outputs 'hls.js' but manifest.json and viewer.js
both referenced 'hls.min.js', causing chrome.runtime.getURL() to
return a 404 — triggering 'HLS player unavailable'.

- Update web_accessible_resources entry in manifest.json
- Update loadHlsJs() chrome.runtime.getURL reference
- Add debug log of manifest URL being loaded for diagnostics

manifest.json

@@ -6,7 +6,8 @@
   "permissions": [
     "storage",
     "tabs",
-    "scripting"
+    "scripting",
+    "webRequest"
   ],
   "host_permissions": [
     "<all_urls>"
@@ -33,7 +34,7 @@
   ],
   "web_accessible_resources": [
     {
-      "resources": ["interceptors.js", "hls.min.js"],
+      "resources": ["interceptors.js", "hls.js"],
       "matches": ["<all_urls>"]
     }
   ],